| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| |
| |
| ngx_int_t |
| ngx_shm_alloc(ngx_shm_t *shm) |
| { |
| u_char *name; |
| uint64_t size; |
| |
| name = ngx_alloc(shm->name.len + 2 + sizeof(NGX_INT32_LEN), shm->log); |
| if (name == NULL) { |
| return NGX_ERROR; |
| } |
| |
| (void) ngx_sprintf(name, "%V_%s%Z", &shm->name, ngx_unique); |
| |
| ngx_set_errno(0); |
| |
| size = shm->size; |
| |
| shm->handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, |
| (u_long) (size >> 32), |
| (u_long) (size & 0xffffffff), |
| (char *) name); |
| |
| if (shm->handle == NULL) { |
| ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
| "CreateFileMapping(%uz, %s) failed", |
| shm->size, name); |
| ngx_free(name); |
| |
| return NGX_ERROR; |
| } |
| |
| ngx_free(name); |
| |
| if (ngx_errno == ERROR_ALREADY_EXISTS) { |
| shm->exists = 1; |
| } |
| |
| shm->addr = MapViewOfFile(shm->handle, FILE_MAP_WRITE, 0, 0, 0); |
| |
| if (shm->addr != NULL) { |
| return NGX_OK; |
| } |
| |
| ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
| "MapViewOfFile(%uz) of file mapping \"%V\" failed", |
| shm->size, &shm->name); |
| |
| if (CloseHandle(shm->handle) == 0) { |
| ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
| "CloseHandle() of file mapping \"%V\" failed", |
| &shm->name); |
| } |
| |
| return NGX_ERROR; |
| } |
| |
| |
| void |
| ngx_shm_free(ngx_shm_t *shm) |
| { |
| if (UnmapViewOfFile(shm->addr) == 0) { |
| ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
| "UnmapViewOfFile(%p) of file mapping \"%V\" failed", |
| shm->addr, &shm->name); |
| } |
| |
| if (CloseHandle(shm->handle) == 0) { |
| ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
| "CloseHandle() of file mapping \"%V\" failed", |
| &shm->name); |
| } |
| } |