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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#if (NGX_HAVE_ATOMIC_OPS)
ngx_int_t
ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name, ngx_log_t *log)
{
mtx->lock = addr;
return NGX_OK;
}
#else
ngx_int_t
ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name, ngx_log_t *log)
{
if (mtx->name) {
if (ngx_strcmp(name, mtx->name) == 0) {
mtx->name = name;
mtx->log = log;
return NGX_OK;
}
ngx_shmtx_destory(mtx);
}
mtx->fd = ngx_open_file(name, NGX_FILE_RDWR, NGX_FILE_CREATE_OR_OPEN);
if (mtx->fd == NGX_INVALID_FILE) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
ngx_open_file_n " \"%s\" failed", name);
return NGX_ERROR;
}
if (ngx_delete_file(name) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
ngx_delete_file_n " \"%s\" failed", name);
}
mtx->name = name;
mtx->log = log;
return NGX_OK;
}
void
ngx_shmtx_destory(ngx_shmtx_t *mtx)
{
if (ngx_close_file(mtx->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, mtx->log, ngx_errno,
ngx_close_file_n " \"%s\" failed", mtx->name);
}
}
#endif
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