mirror of
https://github.com/nginx/nginx.git
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74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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ngx_int_t
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ngx_shm_alloc(ngx_shm_t *shm)
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{
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u_char *name;
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name = ngx_alloc(shm->name.len + 2 + sizeof(NGX_INT32_LEN), shm->log);
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if (name == NULL) {
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return NGX_ERROR;
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}
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ngx_sprintf(name, "%V_%s%Z", &shm->name, ngx_unique);
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ngx_set_errno(0);
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shm->handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE,
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0, shm->size, (char *) name);
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if (shm->handle == NULL) {
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ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
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"CreateFileMapping(%uz, %s) failed",
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shm->size, shm->name.data);
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goto failed;
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}
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if (ngx_errno == ERROR_ALREADY_EXISTS) {
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shm->exists = 1;
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}
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shm->addr = MapViewOfFile(shm->handle, FILE_MAP_WRITE, 0, 0, 0);
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if (shm->addr != NULL) {
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return NGX_OK;
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}
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ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
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"MapViewOfFile(%uz) failed", shm->size);
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if (CloseHandle(shm->handle) == 0) {
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ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
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"CloseHandle() failed");
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}
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failed:
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ngx_free(name);
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return NGX_ERROR;
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}
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void
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ngx_shm_free(ngx_shm_t *shm)
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{
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if (UnmapViewOfFile(shm->addr) == 0) {
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ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
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"UnmapViewOfFile(%p) failed", shm->addr);
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}
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if (CloseHandle(shm->handle) == 0) {
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ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
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"CloseHandle() failed");
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}
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}
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