Mercurial > hg > nginx

annotate src/os/unix/ngx_alloc.c @ 3440:88741ec7731a stable-0.7

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merge r3294, r3305: Fix a bug introduced in r2032: After a child process has read a terminate message from a channel, the process tries to read the channel again. The kernel (at least FreeBSD) may preempt the process and sends a SIGIO signal to a master process. The master process sends a new terminate message, the kernel switches again to the the child process, and the child process reads the messages instead of an EAGAIN error. And this may repeat over and over. Being that the child process can not exit the cycle and test the termination flag set by the message handler. The fix disallow the master process to send a new terminate message on SIGIO signal reception. It may send the message only on SIGALARM signal.
author Igor Sysoev <igor@sysoev.ru>
date Mon, 01 Feb 2010 15:49:36 +0000
parents c6a9e05de301
children 93e8daca5dbb
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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1
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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3 * Copyright (C) Igor Sysoev
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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4 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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5
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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6
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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7 #include <ngx_config.h>
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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8 #include <ngx_core.h>
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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10
860
201d017ea470 slab allocator in shared memory
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11 ngx_uint_t ngx_pagesize;
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12 ngx_uint_t ngx_pagesize_shift;
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d4e858a5751a nginx-0.3.16-RELEASE import
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13 ngx_uint_t ngx_cacheline_size;
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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16 void *
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17 ngx_alloc(size_t size, ngx_log_t *log)
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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18 {
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19 void *p;
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20
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21 p = malloc(size);
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22 if (p == NULL) {
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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23 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
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24 "malloc() %uz bytes failed", size);
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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25 }
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26
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27 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, log, 0, "malloc: %p:%uz", p, size);
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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28
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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29 return p;
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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30 }
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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32
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33 void *
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34 ngx_calloc(size_t size, ngx_log_t *log)
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35 {
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36 void *p;
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37
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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38 p = ngx_alloc(size, log);
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39
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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40 if (p) {
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41 ngx_memzero(p, size);
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42 }
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43
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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44 return p;
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45 }
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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47
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48 #if (NGX_HAVE_POSIX_MEMALIGN)
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49
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50 void *
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51 ngx_memalign(size_t alignment, size_t size, ngx_log_t *log)
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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52 {
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53 void *p;
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54 int err;
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55
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56 err = posix_memalign(&p, alignment, size);
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57
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58 if (err) {
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59 ngx_log_error(NGX_LOG_EMERG, log, err,
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60 "posix_memalign() %uz bytes aligned to %uz failed",
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61 size, alignment);
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62 p = NULL;
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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63 }
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64
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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65 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, log, 0,
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66 "posix_memalign: %p:%uz", p, size);
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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67
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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68 return p;
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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69 }
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70
469
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71 #elif (NGX_HAVE_MEMALIGN)
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73 void *
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74 ngx_memalign(size_t alignment, size_t size, ngx_log_t *log)
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75 {
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76 void *p;
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77
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78 p = memalign(alignment, size);
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79 if (p == NULL) {
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80 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
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81 "memalign() %uz bytes aligned to %uz failed",
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82 size, alignment);
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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83 }
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84
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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85 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, log, 0,
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86 "memalign: %p:%uz", p, size);
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55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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87
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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88 return p;
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89 }
55e496a8ece3 nginx-0.0.3-2004-06-06-23:49:18 import
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90
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91 #endif