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https://github.com/nginx/nginx.git
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69 lines
1.3 KiB
C
69 lines
1.3 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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#if (NGX_HAVE_ATOMIC_OPS)
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ngx_int_t
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ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name)
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{
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mtx->lock = addr;
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return NGX_OK;
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}
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#else
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ngx_int_t
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ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name)
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{
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if (mtx->name) {
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if (ngx_strcmp(name, mtx->name) == 0) {
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mtx->name = name;
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return NGX_OK;
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}
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ngx_shmtx_destory(mtx);
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}
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mtx->fd = ngx_open_file(name, NGX_FILE_RDWR, NGX_FILE_CREATE_OR_OPEN,
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NGX_FILE_DEFAULT_ACCESS);
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if (mtx->fd == NGX_INVALID_FILE) {
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ngx_log_error(NGX_LOG_EMERG, ngx_cycle->log, ngx_errno,
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ngx_open_file_n " \"%s\" failed", name);
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return NGX_ERROR;
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}
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if (ngx_delete_file(name) == NGX_FILE_ERROR) {
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ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
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ngx_delete_file_n " \"%s\" failed", name);
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}
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mtx->name = name;
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return NGX_OK;
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}
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void
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ngx_shmtx_destory(ngx_shmtx_t *mtx)
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{
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if (ngx_close_file(mtx->fd) == NGX_FILE_ERROR) {
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ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
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ngx_close_file_n " \"%s\" failed", mtx->name);
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}
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}
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#endif
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