Mercurial > hg > nginx-vendor-0-8
view src/os/unix/ngx_shared.c @ 77:e6b3de2dc637
Added tag NGINX_0_1_38 for changeset da9a3b14312d
author | Igor Sysoev <http://sysoev.ru> |
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date | Fri, 08 Jul 2005 00:00:00 +0400 |
parents | 6f8b0dc0f8dd |
children |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #if (NGX_HAVE_MAP_ANON) void *ngx_create_shared_memory(size_t size, ngx_log_t *log) { void *p; p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0); if (p == MAP_FAILED) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "mmap(MAP_ANON|MAP_SHARED, %uz) failed", size); return NULL; } return p; } #elif (NGX_HAVE_MAP_DEVZERO) void *ngx_create_shared_memory(size_t size, ngx_log_t *log) { void *p; ngx_fd_t fd; fd = open("/dev/zero", O_RDWR); if (fd == -1) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "open(\"/dev/zero\") failed"); return NULL; } p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); if (p == MAP_FAILED) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "mmap(/dev/zero, MAP_SHARED, %uz) failed", size); p = NULL; } if (close(fd) == -1) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "close(\"/dev/zero\") failed"); } return p; } #elif (NGX_HAVE_SYSVSHM) #include <sys/ipc.h> #include <sys/shm.h> void *ngx_create_shared_memory(size_t size, ngx_log_t *log) { int id; void *p; id = shmget(IPC_PRIVATE, size, (SHM_R|SHM_W|IPC_CREAT)); if (id == -1) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmget(%uz) failed", size); return NULL; } ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "shmget id: %d", id); p = shmat(id, NULL, 0); if (p == (void *) -1) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmat() failed"); p = NULL; } if (shmctl(id, IPC_RMID, NULL) == -1) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmctl(IPC_RMID) failed"); p = NULL; } return p; } #endif