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comparison src/os/unix/ngx_shmem.c @ 154:bb61aa162c6b NGINX_0_3_24

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nginx 0.3.24 *) Workaround: for bug in FreeBSD kqueue. *) Bugfix: now a response generated by the "post_action" directive is not transferred to a client. *) Bugfix: the memory leaks were occurring if many log files were used. *) Bugfix: the first "proxy_redirect" directive was working inside one location. *) Bugfix: on 64-bit platforms segmentation fault may occurred on start if the many names were used in the "server_name" directives; bug appeared in 0.3.18.
author Igor Sysoev <http://sysoev.ru>
date Wed, 01 Feb 2006 00:00:00 +0300
parents
children af37b7cb6698
comparison
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153:c73ae658b822 154:bb61aa162c6b
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9
10
11 #if (NGX_HAVE_MAP_ANON)
12
13 ngx_int_t
14 ngx_shm_alloc(ngx_shm_t *shm)
15 {
16 shm->addr = mmap(NULL, shm->size,
17 PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0);
18
19 if (shm->addr == MAP_FAILED) {
20 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
21 "mmap(MAP_ANON|MAP_SHARED, %uz) failed", shm->size);
22 return NGX_ERROR;
23 }
24
25 return NGX_OK;
26 }
27
28
29 void
30 ngx_shm_free(ngx_shm_t *shm)
31 {
32 if (munmap(shm->addr, shm->size) == -1) {
33 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
34 "munmap(%p, %uz) failed", shm->addr, shm->size);
35 }
36 }
37
38 #elif (NGX_HAVE_MAP_DEVZERO)
39
40 ngx_int_t
41 ngx_shm_alloc(ngx_shm_t *shm)
42 {
43 ngx_fd_t fd;
44
45 fd = open("/dev/zero", O_RDWR);
46
47 if (fd == -1) {
48 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
49 "open(\"/dev/zero\") failed");
50 return NGX_ERROR;
51 }
52
53 shm->addr = mmap(NULL, shm->size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
54
55 if (shm->addr == MAP_FAILED) {
56 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
57 "mmap(/dev/zero, MAP_SHARED, %uz) failed", shm->size);
58 }
59
60 if (close(fd) == -1) {
61 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
62 "close(\"/dev/zero\") failed");
63 }
64
65 return (shm->addr == MAP_FAILED) ? NGX_ERROR : NGX_OK;
66 }
67
68
69 void
70 ngx_shm_free(ngx_shm_t *shm)
71 {
72 if (munmap(shm->addr, shm->size) == -1) {
73 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
74 "munmap(%p, %uz) failed", shm->addr, shm->size);
75 }
76 }
77
78 #elif (NGX_HAVE_SYSVSHM)
79
80 #include <sys/ipc.h>
81 #include <sys/shm.h>
82
83
84 ngx_int_t
85 ngx_shm_alloc(ngx_shm_t *shm)
86 {
87 int id;
88
89 id = shmget(IPC_PRIVATE, shm->size, (SHM_R|SHM_W|IPC_CREAT));
90
91 if (id == -1) {
92 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
93 "shmget(%uz) failed", shm->size);
94 return NGX_ERROR;
95 }
96
97 ngx_log_debug1(NGX_LOG_DEBUG_CORE, shm->log, 0, "shmget id: %d", id);
98
99 shm->addr = shmat(id, NULL, 0);
100
101 if (shm->addr == (void *) -1) {
102 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "shmat() failed");
103 }
104
105 if (shmctl(id, IPC_RMID, NULL) == -1) {
106 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
107 "shmctl(IPC_RMID) failed");
108 }
109
110 return (shm->addr == (void *) -1) ? NGX_ERROR : NGX_OK;
111 }
112
113
114 void
115 ngx_shm_free(ngx_shm_t *shm)
116 {
117 if (shmdt(shm->addr) == -1) {
118 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
119 "shmdt(%p) failed", shm->addr);
120 }
121 }
122
123 #endif