Mercurial > hg > nginx-vendor-current

comparison src/os/unix/ngx_shared.c @ 0:f0b350454894 NGINX_0_1_0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
nginx 0.1.0 *) The first public version.
author Igor Sysoev <http://sysoev.ru>
date Mon, 04 Oct 2004 00:00:00 +0400
parents
children 46833bd150cb
comparison
equal deleted inserted replaced
-1:000000000000 0:f0b350454894
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9
10
11 #if (HAVE_MAP_ANON)
12
13 void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
14 {
15 void *p;
16
17 p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0);
18
19 if (p == MAP_FAILED) {
20 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
21 "mmap(MAP_ANON|MAP_SHARED, " SIZE_T_FMT ") failed",
22 size);
23 return NULL;
24 }
25
26 return p;
27 }
28
29 #elif (HAVE_MAP_DEVZERO)
30
31 void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
32 {
33 void *p;
34 ngx_fd_t fd;
35
36 fd = open("/dev/zero", O_RDWR);
37
38 if (fd == -1) {
39 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
40 "open(/dev/zero) failed");
41 return NULL;
42 }
43
44 p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
45
46 if (p == MAP_FAILED) {
47 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
48 "mmap(/dev/zero, MAP_SHARED, " SIZE_T_FMT ") failed",
49 size);
50 p = NULL;
51 }
52
53 if (close(fd) == -1) {
54 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "close() failed");
55 }
56
57 return p;
58 }
59
60 #elif (HAVE_SYSVSHM)
61
62 #include <sys/ipc.h>
63 #include <sys/shm.h>
64
65
66 void *ngx_create_shared_memory(size_t size, ngx_log_t *log)
67 {
68 int id;
69 void *p;
70
71 id = shmget(IPC_PRIVATE, size, (SHM_R|SHM_W|IPC_CREAT));
72
73 if (id == -1) {
74 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
75 "shmget(" SIZE_T_FMT ") failed", size);
76 return NULL;
77 }
78
79 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "shmget id: %d", id);
80
81 p = shmat(id, NULL, 0);
82
83 if (p == (void *) -1) {
84 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmat() failed");
85 p = NULL;
86 }
87
88 if (shmctl(id, IPC_RMID, NULL) == -1) {
89 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmctl(IPC_RMID) failed");
90 p = NULL;
91 }
92
93 return p;
94 }
95
96 #endif