Mercurial > hg > nginx

annotate src/os/unix/ngx_freebsd_rfork_thread.c @ 305:4b1a3a4acc60

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
nginx-0.0.3-2004-04-02-19:13:20 import
author Igor Sysoev <igor@sysoev.ru>
date Fri, 02 Apr 2004 15:13:20 +0000
parents d4e65d74db9f
children 55e496a8ece3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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1
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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2 /*
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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3 * Copyright (C) 2002-2004 Igor Sysoev, http://sysoev.ru/en/
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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4 */
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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5
3
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
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6
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
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7 #include <ngx_config.h>
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
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8 #include <ngx_core.h>
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
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9
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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10 /*
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
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11 * The threads implementation uses the rfork(RFPROC|RFTHREAD|RFMEM)
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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12 * to create threads. All threads use the stacks of the same size mmap()ed
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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parents: 208
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13 * below the main stack. Thus the stack pointer is used to determine
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
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14 * the current thread id.
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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15 *
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
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16 * The mutex implementation uses the ngx_atomic_cmp_set() operation
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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17 * to acquire mutex and the SysV semaphore to wait on a mutex or to wake up
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
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18 * the waiting threads.
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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19 *
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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20 * The condition variable implementation uses the SysV semaphore set of two
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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21 * semaphores. The first is used by the CV mutex, and the second is used
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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22 * by CV itself.
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83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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23 *
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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24 * This threads implementation currently works on i486 and amd64
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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25 * platforms only.
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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26 */
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fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
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27
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
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28
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d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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29 char *ngx_freebsd_kern_usrstack;
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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30 size_t ngx_thread_stack_size;
3
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31
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
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32
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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33 static size_t rz_size = /* STUB: PAGE_SIZE */ 4096;
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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34 static size_t usable_stack_size;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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35 static char *last_stack;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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36
266
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37 static ngx_uint_t nthreads;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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38 static ngx_uint_t max_threads;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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39 static ngx_tid_t *tids; /* the threads tids array */
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40
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
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41
267
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42 /* the thread-safe libc errno */
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
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43
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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44 static int errno0; /* the main thread's errno */
266
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45 static int *errnos; /* the threads errno's array */
3
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46
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
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47 int *__error()
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
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48 {
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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49 int tid;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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50
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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51 tid = ngx_gettid();
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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52
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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53 return tid ? &errnos[tid - 1] : &errno0;
3
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54 }
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
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55
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
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56
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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57 /*
272
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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58 * __isthreaded enables the spinlocks in some libc functions, i.e. in malloc()
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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59 * and some other places. Nevertheless we protect our malloc()/free() calls
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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60 * by own mutex that is more efficient than the spinlock.
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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61 *
272
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62 * _spinlock() is a weak referenced stub in src/lib/libc/gen/_spinlock_stub.c
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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63 * that does nothing.
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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64 */
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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65
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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66 extern int __isthreaded;
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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67
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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68 void _spinlock(ngx_atomic_t *lock)
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69 {
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70 ngx_int_t tries;
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71
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72 tries = 0;
272
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73
267
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74 for ( ;; ) {
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75
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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76 if (*lock) {
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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77 if (ngx_freebsd_hw_ncpu > 1 && tries++ < 1000) {
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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78 continue;
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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79 }
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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80
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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81 sched_yield();
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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82 tries = 0;
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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83
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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84 } else {
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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85 if (ngx_atomic_cmp_set(lock, 0, 1)) {
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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86 return;
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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87 }
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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88 }
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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89 }
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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90 }
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91
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
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92
272
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93 /*
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94 * Before FreeBSD 5.1 _spinunlock() is a simple #define in
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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95 * src/lib/libc/include/spinlock.h that zeroes lock.
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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96 *
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97 * Since FreeBSD 5.1 _spinunlock() is a weak referenced stub in
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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98 * src/lib/libc/gen/_spinlock_stub.c that does nothing.
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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99 */
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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100
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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101 #ifndef _spinunlock
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102
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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103 void _spinunlock(ngx_atomic_t *lock)
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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104 {
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105 *lock = 0;
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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106 }
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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107
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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108 #endif
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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109
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
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110
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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111 int ngx_create_thread(ngx_tid_t *tid, int (*func)(void *arg), void *arg,
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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112 ngx_log_t *log)
3
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113 {
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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114 int id, err;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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115 char *stack, *stack_top;
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
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116
266
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117 if (nthreads >= max_threads) {
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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118 ngx_log_error(NGX_LOG_CRIT, log, 0,
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
119 "no more than %d threads can be created", max_threads);
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
120 return NGX_ERROR;
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
121 }
3
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
122
272
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
123 last_stack -= ngx_thread_stack_size;
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
124
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
125 stack = mmap(last_stack, usable_stack_size, PROT_READ|PROT_WRITE,
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
126 MAP_STACK, -1, 0);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
127
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
128 if (stack == MAP_FAILED) {
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
129 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
130 "mmap(" PTR_FMT ":" SIZE_T_FMT
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
131 ", MAP_STACK) thread stack failed",
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
132 last_stack, usable_stack_size);
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
133 return NGX_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
134 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
135
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
136 if (stack != last_stack) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
137 ngx_log_error(NGX_LOG_ALERT, log, 0, "stack address was changed");
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
138 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
139
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
140 stack_top = stack + usable_stack_size;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
141
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
142 ngx_log_debug2(NGX_LOG_DEBUG_CORE, log, 0,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
143 "thread stack: " PTR_FMT "-" PTR_FMT, stack, stack_top);
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
144
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
145 #if 1
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
146 id = rfork_thread(RFPROC|RFTHREAD|RFMEM, stack_top, func, arg);
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
147 #elif 1
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
148 id = rfork_thread(RFPROC|RFMEM, stack_top, func, arg);
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
149 #elif 1
85
3549c2bf9eaf nginx-0.0.1-2003-05-07-21:32:45 import
Igor Sysoev <igor@sysoev.ru>
parents: 84
diff changeset
150 id = rfork_thread(RFFDG|RFCFDG, stack_top, func, arg);
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
151 #else
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
152 id = rfork(RFFDG|RFCFDG);
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
153 #endif
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
154
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
155 err = ngx_errno;
3
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
156
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
157 if (id == -1) {
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
158 ngx_log_error(NGX_LOG_ALERT, log, err, "rfork() failed");
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
159
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
160 } else {
3
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
161 *tid = id;
272
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
162 nthreads = (ngx_freebsd_kern_usrstack - stack_top)
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
163 / ngx_thread_stack_size;
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
164 tids[nthreads] = id;
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
165
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
166 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "rfork()ed thread: %d", id);
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
167 }
3
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
168
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
169 return err;
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
170 }
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
171
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
172
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents: 267
diff changeset
173 ngx_int_t ngx_init_threads(int n, size_t size, ngx_cycle_t *cycle)
3
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
174 {
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
175 size_t len;
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
176 char *red_zone, *zone;
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
177
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
178 max_threads = n;
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
179
272
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
180 len = sizeof(ngx_freebsd_kern_usrstack);
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
181 if (sysctlbyname("kern.usrstack", &ngx_freebsd_kern_usrstack, &len,
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
182 NULL, 0) == -1)
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
183 {
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents: 267
diff changeset
184 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
185 "sysctlbyname(kern.usrstack) failed");
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
186 return NGX_ERROR;
3
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
187 }
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
188
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
189 /* the main thread stack red zone */
272
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
190 red_zone = ngx_freebsd_kern_usrstack - (size + rz_size);
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
191
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents: 267
diff changeset
192 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
193 "usrstack: " PTR_FMT " red zone: " PTR_FMT,
272
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
194 ngx_freebsd_kern_usrstack, red_zone);
3
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
195
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
196 zone = mmap(red_zone, rz_size, PROT_NONE, MAP_ANON, -1, 0);
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
197 if (zone == MAP_FAILED) {
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents: 267
diff changeset
198 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
199 "mmap(" PTR_FMT ":" SIZE_T_FMT
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
200 ", PROT_NONE, MAP_ANON) red zone failed",
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
201 red_zone, rz_size);
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
202 return NGX_ERROR;
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
203 }
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
204
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
205 if (zone != red_zone) {
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents: 267
diff changeset
206 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents: 267
diff changeset
207 "red zone address was changed");
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
208 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
209
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
210 /* create the threads errno array */
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
211
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents: 267
diff changeset
212 if (!(errnos = ngx_calloc(n * sizeof(int), cycle->log))) {
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
213 return NGX_ERROR;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
214 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
215
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
216 /* create the threads tid array */
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
217
270
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents: 267
diff changeset
218 if (!(tids = ngx_calloc((n + 1) * sizeof(ngx_tid_t), cycle->log))) {
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
219 return NGX_ERROR;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
220 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
221
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
222 tids[0] = ngx_pid;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
223 nthreads = 1;
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
224
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
225 last_stack = zone + rz_size;
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 85
diff changeset
226 usable_stack_size = size;
272
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
227 ngx_thread_stack_size = size + rz_size;
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
228
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
229 /* allow the spinlock in libc malloc() */
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
230 __isthreaded = 1;
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
231
271
e16dfb9b9afa nginx-0.0.2-2004-02-26-20:10:01 import
Igor Sysoev <igor@sysoev.ru>
parents: 270
diff changeset
232 ngx_threaded = 1;
e16dfb9b9afa nginx-0.0.2-2004-02-26-20:10:01 import
Igor Sysoev <igor@sysoev.ru>
parents: 270
diff changeset
233
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
234 return NGX_OK;
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
235 }
3
34a521b1a148 nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
236
84
fab4cb00fe5b nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
237
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
238 ngx_tid_t ngx_thread_self()
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
239 {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
240 int tid;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
241 ngx_tid_t pid;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
242
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
243 tid = ngx_gettid();
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
244
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
245 if (tids == NULL) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
246 return ngx_pid;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
247 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
248
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
249 #if 0
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
250 if (tids[tid] == 0) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
251 pid = ngx_pid;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
252 tids[tid] = pid;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
253 return pid;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
254 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
255 #endif
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
256
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
257 return tids[tid];
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
258 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
259
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
260
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
261 ngx_mutex_t *ngx_mutex_init(ngx_log_t *log, uint flags)
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
262 {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
263 int nsem, i;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
264 ngx_mutex_t *m;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
265 union semun op;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
267 if (!(m = ngx_alloc(sizeof(ngx_mutex_t), log))) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
268 return NULL;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
269 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
270
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
271 m->lock = 0;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
272 m->log = log;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
273
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
274 if (flags & NGX_MUTEX_LIGHT) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
275 m->semid = -1;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
276 return m;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
277 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
278
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
279 nsem = flags & NGX_MUTEX_CV ? 2 : 1;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
280
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
281 m->semid = semget(IPC_PRIVATE, nsem, SEM_R|SEM_A);
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
282 if (m->semid == -1) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
283 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "semget() failed");
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
284 return NULL;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
285 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
286
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
287 op.val = 0;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
288 for (i = 0; i < nsem; i++) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
289 if (semctl(m->semid, i, SETVAL, op) == -1) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
290 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
291 "semctl(SETVAL) failed");
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
292
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
293 if (semctl(m->semid, 0, IPC_RMID) == -1) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
294 ngx_log_error(NGX_LOG_ALERT, m->log, ngx_errno,
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
295 "semctl(IPC_RMID) failed");
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
296 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
297
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
298 return NULL;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
299 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
300 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
301
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
302 return m;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
303 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
304
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
305
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
306 void ngx_mutex_done(ngx_mutex_t *m)
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
307 {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
308 if (semctl(m->semid, 0, IPC_RMID) == -1) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
309 ngx_log_error(NGX_LOG_ALERT, m->log, ngx_errno,
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
310 "semctl(IPC_RMID) failed");
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
311 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
312
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
313 ngx_free((void *) m);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
314 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
315
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
316
272
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
317 ngx_int_t ngx_mutex_dolock(ngx_mutex_t *m, ngx_int_t try)
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
318 {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
319 uint32_t lock, new, old;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
320 ngx_uint_t tries;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
321 struct sembuf op;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
322
271
e16dfb9b9afa nginx-0.0.2-2004-02-26-20:10:01 import
Igor Sysoev <igor@sysoev.ru>
parents: 270
diff changeset
323 if (!ngx_threaded) {
e16dfb9b9afa nginx-0.0.2-2004-02-26-20:10:01 import
Igor Sysoev <igor@sysoev.ru>
parents: 270
diff changeset
324 return NGX_OK;
e16dfb9b9afa nginx-0.0.2-2004-02-26-20:10:01 import
Igor Sysoev <igor@sysoev.ru>
parents: 270
diff changeset
325 }
e16dfb9b9afa nginx-0.0.2-2004-02-26-20:10:01 import
Igor Sysoev <igor@sysoev.ru>
parents: 270
diff changeset
326
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
327 #if (NGX_DEBUG)
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
328 if (try) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
329 ngx_log_debug2(NGX_LOG_DEBUG_CORE, m->log, 0,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
330 "try lock mutex " PTR_FMT " lock:%X", m, m->lock);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
331 } else {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
332 ngx_log_debug2(NGX_LOG_DEBUG_CORE, m->log, 0,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
333 "lock mutex " PTR_FMT " lock:%X", m, m->lock);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
334 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
335 #endif
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
336
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
337 old = m->lock;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
338 tries = 0;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
339
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
340 for ( ;; ) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
341 if (old & NGX_MUTEX_LOCK_BUSY) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
342
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
343 if (try) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
344 return NGX_AGAIN;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
345 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
346
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
347 if (ngx_freebsd_hw_ncpu > 1 && tries++ < 1000) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
348
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
349 /* the spinlock is used only on the SMP system */
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
350
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
351 old = m->lock;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
352 continue;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
353 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
354
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
355 if (m->semid == -1) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
356 sched_yield();
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
357
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
358 tries = 0;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
359 old = m->lock;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
360 continue;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
361 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
362
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
363 ngx_log_debug2(NGX_LOG_DEBUG_CORE, m->log, 0,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
364 "mutex " PTR_FMT " lock:%X", m, m->lock);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
365
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
366 /*
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
367 * The mutex is locked so we increase a number
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
368 * of the threads that are waiting on the mutex
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
369 */
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
370
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
371 lock = old + 1;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
372
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
373 if ((lock & ~NGX_MUTEX_LOCK_BUSY) > nthreads) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
374 ngx_log_error(NGX_LOG_ALERT, m->log, ngx_errno,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
375 "%d threads wait for mutex " PTR_FMT
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
376 ", while only %d threads are available",
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
377 lock & ~NGX_MUTEX_LOCK_BUSY, m, nthreads);
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
378 return NGX_ERROR;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
379 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
380
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
381 if (ngx_atomic_cmp_set(&m->lock, old, lock)) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
382
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
383 ngx_log_debug2(NGX_LOG_DEBUG_CORE, m->log, 0,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
384 "wait mutex " PTR_FMT " lock:%X", m, m->lock);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
385
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
386 /*
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
387 * The number of the waiting threads has been increased
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
388 * and we would wait on the SysV semaphore.
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
389 * A semaphore should wake up us more efficiently than
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
390 * a simple usleep().
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
391 */
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
392
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
393 op.sem_num = 0;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
394 op.sem_op = -1;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
395 op.sem_flg = SEM_UNDO;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
396
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
397 if (semop(m->semid, &op, 1) == -1) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
398 ngx_log_error(NGX_LOG_ALERT, m->log, ngx_errno,
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
399 "semop() failed while waiting "
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
400 "on mutex " PTR_FMT, m);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
401 return NGX_ERROR;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
402 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
403
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
404 tries = 0;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
405 old = m->lock;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
406 continue;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
407 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
408
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
409 old = m->lock;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
410
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
411 } else {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
412 lock = old | NGX_MUTEX_LOCK_BUSY;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
413
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
414 if (ngx_atomic_cmp_set(&m->lock, old, lock)) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
415
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
416 /* we locked the mutex */
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
417
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
418 break;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
419 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
420
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
421 old = m->lock;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
422 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
423
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
424 if (tries++ > 1000) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
425
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
426 ngx_log_debug1(NGX_LOG_DEBUG_CORE, m->log, 0,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
427 "mutex " PTR_FMT " is contested", m);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
428
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
429 /* the mutex is probably contested so we are giving up now */
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
430
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
431 sched_yield();
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
432
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
433 tries = 0;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
434 old = m->lock;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
435 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
436 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
437
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
438 ngx_log_debug2(NGX_LOG_DEBUG_CORE, m->log, 0,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
439 "mutex " PTR_FMT " is locked, lock:%X", m, m->lock);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
440
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
441 return NGX_OK;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
442 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
443
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
444
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
445 ngx_int_t ngx_mutex_unlock(ngx_mutex_t *m)
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
446 {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
447 uint32_t lock, new, old;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
448 struct sembuf op;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
449
271
e16dfb9b9afa nginx-0.0.2-2004-02-26-20:10:01 import
Igor Sysoev <igor@sysoev.ru>
parents: 270
diff changeset
450 if (!ngx_threaded) {
e16dfb9b9afa nginx-0.0.2-2004-02-26-20:10:01 import
Igor Sysoev <igor@sysoev.ru>
parents: 270
diff changeset
451 return NGX_OK;
e16dfb9b9afa nginx-0.0.2-2004-02-26-20:10:01 import
Igor Sysoev <igor@sysoev.ru>
parents: 270
diff changeset
452 }
e16dfb9b9afa nginx-0.0.2-2004-02-26-20:10:01 import
Igor Sysoev <igor@sysoev.ru>
parents: 270
diff changeset
453
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
454 old = m->lock;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
455
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
456 if (!(old & NGX_MUTEX_LOCK_BUSY)) {
272
d4e65d74db9f nginx-0.0.2-2004-03-01-00:03:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 271
diff changeset
457 ngx_log_error(NGX_LOG_ALERT, m->log, 0,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
458 "tring to unlock the free mutex " PTR_FMT, m);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
459 return NGX_ERROR;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
460 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
461
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
462 /* free the mutex */
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
463
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
464 for ( ;; ) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
465 lock = old & ~NGX_MUTEX_LOCK_BUSY;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
466
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
467 if (ngx_atomic_cmp_set(&m->lock, old, lock)) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
468 break;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
469 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
470
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
471 old = m->lock;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
472 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
473
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
474 if (m->semid == -1) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
475 ngx_log_debug1(NGX_LOG_DEBUG_CORE, m->log, 0,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
476 "mutex " PTR_FMT " is unlocked", m);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
477
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
478 return NGX_OK;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
479 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
480
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
481 /* check weather we need to wake up a waiting thread */
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
482
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
483 old = m->lock;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
484
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
485 for ( ;; ) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
486 if (old & NGX_MUTEX_LOCK_BUSY) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
487
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
488 /* the mutex is just locked by another thread */
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
489
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
490 break;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
491 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
492
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
493 if (old == 0) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
494 break;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
495 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
496
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
497 /* there are the waiting threads */
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
498
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
499 lock = old - 1;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
500
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
501 if (ngx_atomic_cmp_set(&m->lock, old, lock)) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
502
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
503 /* wake up the thread that waits on semaphore */
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
504
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
505 op.sem_num = 0;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
506 op.sem_op = 1;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
507 op.sem_flg = SEM_UNDO;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
508
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
509 if (semop(m->semid, &op, 1) == -1) {
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
510 ngx_log_error(NGX_LOG_ALERT, m->log, ngx_errno,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
511 "semop() failed while waking up on mutex "
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
512 PTR_FMT, m);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
513 return NGX_ERROR;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
514 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
515
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
516 break;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
517 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
518
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
519 old = m->lock;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
520 }
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
521
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
522 ngx_log_debug1(NGX_LOG_DEBUG_CORE, m->log, 0,
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
523 "mutex " PTR_FMT " is unlocked", m);
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
524
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
525 return NGX_OK;
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 208
diff changeset
526 }