blob: 07a6714387830fb2b61c695f595adb8fa93f0e8d [file] [log] [blame]
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#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);
}
}