Mercurial > hg > nginx-vendor-1-0
comparison src/os/unix/ngx_shared.c @ 0:f0b350454894 NGINX_0_1_0
nginx 0.1.0
*) The first public version.
author | Igor Sysoev <http://sysoev.ru> |
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date | Mon, 04 Oct 2004 00:00:00 +0400 |
parents | |
children | 46833bd150cb |
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-1:000000000000 | 0:f0b350454894 |
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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 |