Mercurial > hg > nginx
view src/os/unix/ngx_shmem.c @ 5392:f1caf7b8ae1d
Upstream: subrequest_in_memory fix.
With previous code only part of u->buffer might be emptied in case
of special responses, resulting in partial responses seen by SSI set
in case of simple protocols, or spurious errors like "upstream sent
invalid chunked response" in case of complex ones.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Fri, 27 Sep 2013 16:50:26 +0400 |
parents | d620f497c50f |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #if (NGX_HAVE_MAP_ANON) ngx_int_t ngx_shm_alloc(ngx_shm_t *shm) { shm->addr = (u_char *) mmap(NULL, shm->size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0); if (shm->addr == MAP_FAILED) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "mmap(MAP_ANON|MAP_SHARED, %uz) failed", shm->size); return NGX_ERROR; } return NGX_OK; } void ngx_shm_free(ngx_shm_t *shm) { if (munmap((void *) shm->addr, shm->size) == -1) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "munmap(%p, %uz) failed", shm->addr, shm->size); } } #elif (NGX_HAVE_MAP_DEVZERO) ngx_int_t ngx_shm_alloc(ngx_shm_t *shm) { ngx_fd_t fd; fd = open("/dev/zero", O_RDWR); if (fd == -1) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "open(\"/dev/zero\") failed"); return NGX_ERROR; } shm->addr = (u_char *) mmap(NULL, shm->size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); if (shm->addr == MAP_FAILED) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "mmap(/dev/zero, MAP_SHARED, %uz) failed", shm->size); } if (close(fd) == -1) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "close(\"/dev/zero\") failed"); } return (shm->addr == MAP_FAILED) ? NGX_ERROR : NGX_OK; } void ngx_shm_free(ngx_shm_t *shm) { if (munmap((void *) shm->addr, shm->size) == -1) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "munmap(%p, %uz) failed", shm->addr, shm->size); } } #elif (NGX_HAVE_SYSVSHM) #include <sys/ipc.h> #include <sys/shm.h> ngx_int_t ngx_shm_alloc(ngx_shm_t *shm) { int id; id = shmget(IPC_PRIVATE, shm->size, (SHM_R|SHM_W|IPC_CREAT)); if (id == -1) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "shmget(%uz) failed", shm->size); return NGX_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_CORE, shm->log, 0, "shmget id: %d", id); shm->addr = shmat(id, NULL, 0); if (shm->addr == (void *) -1) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "shmat() failed"); } if (shmctl(id, IPC_RMID, NULL) == -1) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "shmctl(IPC_RMID) failed"); } return (shm->addr == (void *) -1) ? NGX_ERROR : NGX_OK; } void ngx_shm_free(ngx_shm_t *shm) { if (shmdt(shm->addr) == -1) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "shmdt(%p) failed", shm->addr); } } #endif