Sweden-Number/scheduler/semaphore.c

159 lines
4.7 KiB
C

/*
* Win32 semaphores
*
* Copyright 1998 Alexandre Julliard
*/
#include <assert.h>
#include <string.h>
#include "winerror.h"
#include "wine/unicode.h"
#include "server.h"
/***********************************************************************
* CreateSemaphoreA (KERNEL32.174)
*/
HANDLE WINAPI CreateSemaphoreA( SECURITY_ATTRIBUTES *sa, LONG initial, LONG max, LPCSTR name )
{
HANDLE ret;
DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
/* Check parameters */
if ((max <= 0) || (initial < 0) || (initial > max))
{
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
if (len >= MAX_PATH)
{
SetLastError( ERROR_FILENAME_EXCED_RANGE );
return 0;
}
SERVER_START_REQ
{
struct create_semaphore_request *req = server_alloc_req( sizeof(*req),
len * sizeof(WCHAR) );
req->initial = (unsigned int)initial;
req->max = (unsigned int)max;
req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
SetLastError(0);
server_call( REQ_CREATE_SEMAPHORE );
ret = req->handle;
}
SERVER_END_REQ;
if (ret == -1) ret = 0; /* must return 0 on failure, not -1 */
return ret;
}
/***********************************************************************
* CreateSemaphoreW (KERNEL32.175)
*/
HANDLE WINAPI CreateSemaphoreW( SECURITY_ATTRIBUTES *sa, LONG initial,
LONG max, LPCWSTR name )
{
HANDLE ret;
DWORD len = name ? strlenW(name) : 0;
/* Check parameters */
if ((max <= 0) || (initial < 0) || (initial > max))
{
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
if (len >= MAX_PATH)
{
SetLastError( ERROR_FILENAME_EXCED_RANGE );
return 0;
}
SERVER_START_REQ
{
struct create_semaphore_request *req = server_alloc_req( sizeof(*req),
len * sizeof(WCHAR) );
req->initial = (unsigned int)initial;
req->max = (unsigned int)max;
req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
SetLastError(0);
server_call( REQ_CREATE_SEMAPHORE );
ret = req->handle;
}
SERVER_END_REQ;
if (ret == -1) ret = 0; /* must return 0 on failure, not -1 */
return ret;
}
/***********************************************************************
* OpenSemaphoreA (KERNEL32.545)
*/
HANDLE WINAPI OpenSemaphoreA( DWORD access, BOOL inherit, LPCSTR name )
{
HANDLE ret;
DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
if (len >= MAX_PATH)
{
SetLastError( ERROR_FILENAME_EXCED_RANGE );
return 0;
}
SERVER_START_REQ
{
struct open_semaphore_request *req = server_alloc_req( sizeof(*req),
len * sizeof(WCHAR) );
req->access = access;
req->inherit = inherit;
if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
server_call( REQ_OPEN_SEMAPHORE );
ret = req->handle;
}
SERVER_END_REQ;
if (ret == -1) ret = 0; /* must return 0 on failure, not -1 */
return ret;
}
/***********************************************************************
* OpenSemaphoreW (KERNEL32.546)
*/
HANDLE WINAPI OpenSemaphoreW( DWORD access, BOOL inherit, LPCWSTR name )
{
HANDLE ret;
DWORD len = name ? strlenW(name) : 0;
if (len >= MAX_PATH)
{
SetLastError( ERROR_FILENAME_EXCED_RANGE );
return 0;
}
SERVER_START_REQ
{
struct open_semaphore_request *req = server_alloc_req( sizeof(*req), len * sizeof(WCHAR) );
req->access = access;
req->inherit = inherit;
memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
server_call( REQ_OPEN_SEMAPHORE );
ret = req->handle;
}
SERVER_END_REQ;
if (ret == -1) ret = 0; /* must return 0 on failure, not -1 */
return ret;
}
/***********************************************************************
* ReleaseSemaphore (KERNEL32.583)
*/
BOOL WINAPI ReleaseSemaphore( HANDLE handle, LONG count, LONG *previous )
{
NTSTATUS status = NtReleaseSemaphore( handle, count, previous );
if (status) SetLastError( RtlNtStatusToDosError(status) );
return !status;
}