Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_shmem.c @ 638:76bf795b5a02
release-0.3.40 tag
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 19 Apr 2006 15:30:56 +0000 |
parents | 5dac8c7fb71b |
children | 715d24327080 |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 |
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10 |
469 | 11 #if (NGX_HAVE_MAP_ANON) |
358
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12 |
605 | 13 ngx_int_t |
14 ngx_shm_alloc(ngx_shm_t *shm) | |
358
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15 { |
605 | 16 shm->addr = mmap(NULL, shm->size, |
17 PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0); | |
358
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18 |
605 | 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; | |
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23 } |
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24 |
605 | 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 } | |
358
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36 } |
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37 |
469 | 38 #elif (NGX_HAVE_MAP_DEVZERO) |
358
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39 |
605 | 40 ngx_int_t |
41 ngx_shm_alloc(ngx_shm_t *shm) | |
358
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42 { |
605 | 43 ngx_fd_t fd; |
358
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44 |
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45 fd = open("/dev/zero", O_RDWR); |
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46 |
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47 if (fd == -1) { |
605 | 48 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
467 | 49 "open(\"/dev/zero\") failed"); |
605 | 50 return NGX_ERROR; |
358
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51 } |
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52 |
605 | 53 shm->addr = mmap(NULL, shm->size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); |
358
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54 |
605 | 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); | |
358
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58 } |
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59 |
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60 if (close(fd) == -1) { |
605 | 61 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
467 | 62 "close(\"/dev/zero\") failed"); |
358
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63 } |
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64 |
605 | 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 } | |
358
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76 } |
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77 |
469 | 78 #elif (NGX_HAVE_SYSVSHM) |
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79 |
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80 #include <sys/ipc.h> |
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81 #include <sys/shm.h> |
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82 |
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83 |
605 | 84 ngx_int_t |
85 ngx_shm_alloc(ngx_shm_t *shm) | |
358
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86 { |
605 | 87 int id; |
358
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88 |
605 | 89 id = shmget(IPC_PRIVATE, shm->size, (SHM_R|SHM_W|IPC_CREAT)); |
358
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90 |
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91 if (id == -1) { |
605 | 92 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
93 "shmget(%uz) failed", shm->size); | |
94 return NGX_ERROR; | |
358
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95 } |
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96 |
605 | 97 ngx_log_debug1(NGX_LOG_DEBUG_CORE, shm->log, 0, "shmget id: %d", id); |
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98 |
605 | 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"); | |
358
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103 } |
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104 |
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105 if (shmctl(id, IPC_RMID, NULL) == -1) { |
605 | 106 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
107 "shmctl(IPC_RMID) failed"); | |
358
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108 } |
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109 |
605 | 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 } | |
358
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121 } |
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122 |
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123 #endif |