Mercurial > hg > nginx
annotate src/os/unix/ngx_freebsd_rfork_thread.c @ 270:7bb9562216ce
nginx-0.0.2-2004-02-25-23:16:15 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 25 Feb 2004 20:16:15 +0000 |
parents | 83205e0b5522 |
children | e16dfb9b9afa |
rev | line source |
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2 #include <ngx_config.h> |
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3 #include <ngx_core.h> |
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5 /* |
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6 * The threads implementation uses the rfork(RFPROC|RFTHREAD|RFMEM) |
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7 * to create threads. All threads use the stacks of the same size mmap()ed |
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8 * below the main stack. Thus the stack pointer is used to determine |
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9 * the current thread id. |
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10 * |
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11 * The mutex implementation uses the ngx_atomic_cmp_set() operation |
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12 * to acquire mutex and the SysV semaphore to wait on a mutex or to wake up |
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13 * the waiting threads. |
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14 * |
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15 * The condition variable implementation uses the SysV semaphore set of two |
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16 * semaphores. The first is used by the CV mutex, and the second is used |
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17 * by CV itself. |
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18 * |
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19 * This threads implementation currently works on i486 and amd64 |
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20 * platforms only. |
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21 */ |
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24 static inline int ngx_gettid(); |
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27 static char *usrstack; |
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28 static size_t rz_size = /* STUB: PAGE_SIZE */ 4096; |
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29 |
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30 static size_t stack_size; |
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31 static size_t usable_stack_size; |
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32 static char *last_stack; |
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33 |
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34 static ngx_uint_t nthreads; |
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35 static ngx_uint_t max_threads; |
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36 static ngx_tid_t *tids; /* the threads tids array */ |
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39 /* the thread-safe libc errno */ |
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41 static int errno0; /* the main thread's errno */ |
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42 static int *errnos; /* the threads errno's array */ |
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43 |
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44 int *__error() |
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45 { |
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46 int tid; |
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48 tid = ngx_gettid(); |
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49 |
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50 return tid ? &errnos[tid - 1] : &errno0; |
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51 } |
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52 |
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53 |
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54 /* |
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55 * __isthreaded enables spinlock() in some libc functions, i.e. in malloc() |
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56 * and some other places. Nevertheless we protect our malloc()/free() calls |
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57 * by own mutex that is more efficient than the spinlock. |
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58 * |
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59 * We define own _spinlock() because a weak referenced _spinlock() stub in |
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60 * src/lib/libc/gen/_spinlock_stub.c does nothing. |
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61 */ |
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62 |
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63 extern int __isthreaded; |
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64 |
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65 void _spinlock(ngx_atomic_t *lock) |
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66 { |
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67 ngx_int_t tries; |
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68 |
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69 tries = 0; |
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70 for ( ;; ) { |
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71 |
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72 if (*lock) { |
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73 if (ngx_freebsd_hw_ncpu > 1 && tries++ < 1000) { |
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74 continue; |
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75 } |
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76 |
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77 sched_yield(); |
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78 tries = 0; |
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79 |
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80 } else { |
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81 if (ngx_atomic_cmp_set(lock, 0, 1)) { |
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82 return; |
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83 } |
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84 } |
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85 } |
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86 } |
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87 |
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88 |
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89 int ngx_create_thread(ngx_tid_t *tid, int (*func)(void *arg), void *arg, |
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90 ngx_log_t *log) |
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91 { |
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92 int id, err; |
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93 char *stack, *stack_top; |
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94 |
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95 if (nthreads >= max_threads) { |
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96 ngx_log_error(NGX_LOG_CRIT, log, 0, |
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97 "no more than %d threads can be created", max_threads); |
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98 return NGX_ERROR; |
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99 } |
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100 |
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101 last_stack -= stack_size; |
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102 |
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103 stack = mmap(last_stack, usable_stack_size, PROT_READ|PROT_WRITE, |
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104 MAP_STACK, -1, 0); |
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nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
105 |
86
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
106 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
|
107 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
|
108 "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
|
109 ", 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
|
110 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
|
111 return NGX_ERROR; |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
112 } |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
113 |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
114 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
|
115 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
|
116 } |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
117 |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
118 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
|
119 |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
120 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
|
121 "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
|
122 |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
123 #if 1 |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
124 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
|
125 #elif 1 |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
126 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
|
127 #elif 1 |
85
3549c2bf9eaf
nginx-0.0.1-2003-05-07-21:32:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
84
diff
changeset
|
128 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
|
129 #else |
86
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
130 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
|
131 #endif |
86
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
132 |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
133 err = ngx_errno; |
3
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
134 |
84
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
changeset
|
135 if (id == -1) { |
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
changeset
|
136 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
|
137 |
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
changeset
|
138 } else { |
3
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
139 *tid = id; |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
140 nthreads = (usrstack - stack_top) / stack_size; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
141 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
|
142 |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
143 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
|
144 } |
3
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
145 |
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
146 return err; |
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
147 } |
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
148 |
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
149 |
270
7bb9562216ce
nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
267
diff
changeset
|
150 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
|
151 { |
267
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
266
diff
changeset
|
152 size_t len; |
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
266
diff
changeset
|
153 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
|
154 |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
155 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
|
156 |
267
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
266
diff
changeset
|
157 len = sizeof(usrstack); |
84
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
changeset
|
158 if (sysctlbyname("kern.usrstack", &usrstack, &len, NULL, 0) == -1) { |
270
7bb9562216ce
nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
267
diff
changeset
|
159 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
|
160 "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
|
161 return NGX_ERROR; |
3
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
162 } |
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
163 |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
164 /* the main thread stack red zone */ |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
165 red_zone = 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
|
166 |
270
7bb9562216ce
nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
267
diff
changeset
|
167 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
|
168 "usrstack: " PTR_FMT " red zone: " PTR_FMT, |
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
266
diff
changeset
|
169 usrstack, red_zone); |
3
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
170 |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
171 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
|
172 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
|
173 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
|
174 "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
|
175 ", 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
|
176 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
|
177 return NGX_ERROR; |
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
changeset
|
178 } |
86
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
179 |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
180 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
|
181 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
|
182 "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
|
183 } |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
85
diff
changeset
|
184 |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
185 /* 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
|
186 |
270
7bb9562216ce
nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
267
diff
changeset
|
187 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
|
188 return NGX_ERROR; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
189 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
190 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
191 /* 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
|
192 |
270
7bb9562216ce
nginx-0.0.2-2004-02-25-23:16:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
267
diff
changeset
|
193 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
|
194 return NGX_ERROR; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
195 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
196 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
197 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
|
198 nthreads = 1; |
84
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
changeset
|
199 |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
200 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
|
201 usable_stack_size = size; |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
202 stack_size = size + rz_size; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
203 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
204 /* 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
|
205 __isthreaded = 1; |
84
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
changeset
|
206 |
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
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|
207 return NGX_OK; |
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
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diff
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|
208 } |
3
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
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|
209 |
84
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
3
diff
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210 |
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
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parents:
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diff
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|
211 static inline int ngx_gettid() |
93
738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
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parents:
86
diff
changeset
|
212 { |
84
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
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parents:
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diff
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|
213 char *sp; |
fab4cb00fe5b
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diff
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214 |
86
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
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parents:
85
diff
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|
215 if (stack_size == 0) { |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
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parents:
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216 return 0; |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
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parents:
85
diff
changeset
|
217 } |
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
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parents:
85
diff
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|
218 |
267
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
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parents:
266
diff
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|
219 #if ( __i386__ ) |
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
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diff
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220 |
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parents:
266
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|
221 __asm__ volatile ("mov %%esp, %0" : "=q" (sp)); |
83205e0b5522
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parents:
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diff
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222 |
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nginx-0.0.2-2004-02-24-20:31:46 import
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parents:
266
diff
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|
223 #elif ( __amd64__ ) |
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
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parents:
266
diff
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224 |
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
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parents:
266
diff
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|
225 __asm__ volatile ("mov %%rsp, %0" : "=q" (sp)); |
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
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parents:
266
diff
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|
226 |
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
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parents:
266
diff
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|
227 #endif |
84
fab4cb00fe5b
nginx-0.0.1-2003-05-06-21:03:16 import
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parents:
3
diff
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|
228 |
86
3973260705cc
nginx-0.0.1-2003-05-12-19:52:24 import
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parents:
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|
229 return (usrstack - sp) / stack_size; |
3
34a521b1a148
nginx-0.0.1-2002-08-20-18:48:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
230 } |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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231 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
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232 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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233 ngx_tid_t ngx_thread_self() |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
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234 { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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235 int tid; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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|
236 ngx_tid_t pid; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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237 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
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|
238 tid = ngx_gettid(); |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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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 if (tids == NULL) { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
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diff
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|
241 return ngx_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 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
244 #if 0 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
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diff
changeset
|
245 if (tids[tid] == 0) { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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246 pid = ngx_pid; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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diff
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247 tids[tid] = pid; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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248 return pid; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
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249 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
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250 #endif |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
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251 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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252 return tids[tid]; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
253 } |
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 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
256 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
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257 { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
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|
258 int nsem, i; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
changeset
|
259 ngx_mutex_t *m; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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|
260 union semun op; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
changeset
|
261 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
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262 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
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263 return NULL; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
264 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
265 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
266 m->lock = 0; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
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|
267 m->log = log; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
268 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
269 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
|
270 m->semid = -1; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
271 return m; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
272 } |
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 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
|
275 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
276 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
|
277 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
|
278 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
|
279 return NULL; |
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 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
282 op.val = 0; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
283 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
|
284 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
|
285 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
|
286 "semctl(SETVAL) failed"); |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
287 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
288 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
|
289 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
|
290 "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
|
291 } |
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 return NULL; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
294 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
295 } |
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 return m; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
298 } |
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 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
|
302 { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
303 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
|
304 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
|
305 "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
|
306 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
307 |
267
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
266
diff
changeset
|
308 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
|
309 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
310 |
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 ngx_int_t ngx_mutex_do_lock(ngx_mutex_t *m, ngx_int_t try) |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
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|
313 { |
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314 uint32_t lock, new, old; |
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315 ngx_uint_t tries; |
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316 struct sembuf op; |
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317 |
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318 #if (NGX_DEBUG) |
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319 if (try) { |
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320 ngx_log_debug2(NGX_LOG_DEBUG_CORE, m->log, 0, |
267
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321 "try lock mutex " PTR_FMT " lock:%X", m, m->lock); |
266
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322 } else { |
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323 ngx_log_debug2(NGX_LOG_DEBUG_CORE, m->log, 0, |
267
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324 "lock mutex " PTR_FMT " lock:%X", m, m->lock); |
266
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325 } |
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326 #endif |
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327 |
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328 old = m->lock; |
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nginx-0.0.2-2004-02-23-23:57:12 import
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329 tries = 0; |
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diff
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330 |
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nginx-0.0.2-2004-02-23-23:57:12 import
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diff
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331 for ( ;; ) { |
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nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
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diff
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332 if (old & NGX_MUTEX_LOCK_BUSY) { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
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diff
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|
333 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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|
334 if (try) { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
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diff
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335 return NGX_AGAIN; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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|
336 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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diff
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|
337 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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|
338 if (ngx_freebsd_hw_ncpu > 1 && tries++ < 1000) { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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208
diff
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|
339 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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|
340 /* the spinlock is used only on the SMP system */ |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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208
diff
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|
341 |
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nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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|
342 old = m->lock; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
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|
343 continue; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
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|
344 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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|
345 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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|
346 if (m->semid == -1) { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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|
347 sched_yield(); |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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|
348 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
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parents:
208
diff
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349 tries = 0; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
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|
350 old = m->lock; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
351 continue; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
352 } |
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
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|
354 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
|
355 "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
|
356 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
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|
357 /* |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
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|
358 * 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
|
359 * 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
|
360 */ |
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
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|
362 lock = old + 1; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
363 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
364 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
|
365 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
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|
366 "%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
|
367 ", 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
|
368 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
|
369 return NGX_ERROR; |
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 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
372 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
|
373 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
374 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
|
375 "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
|
376 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
377 /* |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
378 * 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
|
379 * 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
|
380 * 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
|
381 * a simple usleep(). |
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 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
384 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
|
385 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
|
386 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
|
387 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
388 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
|
389 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
|
390 "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
|
391 "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
|
392 return NGX_ERROR; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
393 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
394 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
395 tries = 0; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
396 old = m->lock; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
397 continue; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
398 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
399 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
400 old = m->lock; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
401 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
402 } else { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
403 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
|
404 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
405 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
|
406 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
407 /* 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
|
408 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
409 break; |
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 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
412 old = m->lock; |
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 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
415 if (tries++ > 1000) { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
416 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
417 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
|
418 "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
|
419 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
420 /* 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
|
421 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
422 sched_yield(); |
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 tries = 0; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
425 old = m->lock; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
426 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
427 } |
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 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
|
430 "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
|
431 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
432 return NGX_OK; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
433 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
434 |
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 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
|
437 { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
438 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
|
439 struct sembuf op; |
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 old = m->lock; |
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 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
|
444 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
|
445 "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
|
446 return NGX_ERROR; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
447 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
448 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
449 /* free the mutex */ |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
450 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
451 for ( ;; ) { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
452 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
|
453 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
454 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
|
455 break; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
456 } |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
457 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
458 old = m->lock; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
459 } |
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 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
|
462 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
|
463 "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
|
464 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
465 return NGX_OK; |
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 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
468 /* 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
|
469 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
470 old = m->lock; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
471 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
472 for ( ;; ) { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
473 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
|
474 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
475 /* 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
|
476 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
477 break; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
478 } |
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 if (old == 0) { |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
481 break; |
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 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
484 /* 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
|
485 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
486 lock = old - 1; |
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 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
|
489 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
490 /* 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
|
491 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
492 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
|
493 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
|
494 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
|
495 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
496 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
|
497 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
|
498 "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
|
499 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
|
500 return NGX_ERROR; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
501 } |
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 break; |
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 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
506 old = m->lock; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
507 } |
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 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
|
510 "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
|
511 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
512 return NGX_OK; |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
208
diff
changeset
|
513 } |