Mercurial > hg > nginx-quic
comparison src/os/unix/ngx_shared.c @ 358:0a03c921c81d
nginx-0.0.7-2004-06-17-21:18:53 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 17 Jun 2004 17:18:53 +0000 |
parents | |
children | da8c5707af39 |
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357:e260514b9ad4 | 358:0a03c921c81d |
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1 | |
2 #include <ngx_config.h> | |
3 #include <ngx_core.h> | |
4 | |
5 | |
6 #if (HAVE_MAP_ANON) | |
7 | |
8 void *ngx_create_shared_memory(size_t size, ngx_log_t *log) | |
9 { | |
10 void *p; | |
11 | |
12 p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0); | |
13 | |
14 if (p == MAP_FAILED) { | |
15 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
16 "mmap(MAP_ANON|MAP_SHARED, " SIZE_T_FMT ") failed", | |
17 size); | |
18 return NULL; | |
19 } | |
20 | |
21 return p; | |
22 } | |
23 | |
24 #elif (HAVE_MAP_DEVZERO) | |
25 | |
26 void *ngx_create_shared_memory(size_t size, ngx_log_t *log) | |
27 { | |
28 void *p; | |
29 ngx_fd_t fd; | |
30 | |
31 fd = open("/dev/zero", O_RDWR); | |
32 | |
33 if (fd == -1) { | |
34 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
35 "open(/dev/zero) failed"); | |
36 return NULL; | |
37 } | |
38 | |
39 p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); | |
40 | |
41 if (p == MAP_FAILED) { | |
42 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
43 "mmap(/dev/zero, MAP_SHARED, " SIZE_T_FMT ") failed", | |
44 size); | |
45 p = NULL; | |
46 } | |
47 | |
48 if (close(fd) == -1) { | |
49 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "close() failed"); | |
50 } | |
51 | |
52 return p; | |
53 } | |
54 | |
55 #elif (HAVE_SYSVSHM) | |
56 | |
57 #include <sys/ipc.h> | |
58 #include <sys/shm.h> | |
59 | |
60 | |
61 void *ngx_create_shared_memory(size_t size, ngx_log_t *log) | |
62 { | |
63 int id; | |
64 void *p; | |
65 | |
66 id = shmget(IPC_PRIVATE, size, (SHM_R|SHM_W|IPC_CREAT)); | |
67 | |
68 if (id == -1) { | |
69 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
70 "shmget(" SIZE_T_FMT ") failed", size); | |
71 return NULL; | |
72 } | |
73 | |
74 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "shmget id: %d", id); | |
75 | |
76 p = shmat(id, NULL, 0); | |
77 | |
78 if (p == (void *) -1) { | |
79 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmat() failed"); | |
80 p = NULL; | |
81 } | |
82 | |
83 if (shmctl(id, IPC_RMID, NULL) == -1) { | |
84 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmctl(IPC_RMID) failed"); | |
85 p = NULL; | |
86 } | |
87 | |
88 return p; | |
89 } | |
90 | |
91 #endif |