Sweden-Number/scheduler/mutex.c

88 lines
2.5 KiB
C

/*
* Win32 mutexes
*
* Copyright 1998 Alexandre Julliard
*/
#include <assert.h>
#include <string.h>
#include "winerror.h"
#include "heap.h"
#include "server/request.h"
#include "server.h"
/***********************************************************************
* CreateMutex32A (KERNEL32.166)
*/
HANDLE WINAPI CreateMutexA( SECURITY_ATTRIBUTES *sa, BOOL owner, LPCSTR name )
{
struct create_mutex_request req;
struct create_mutex_reply reply;
int len = name ? strlen(name) + 1 : 0;
req.owned = owner;
req.inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
CLIENT_SendRequest( REQ_CREATE_MUTEX, -1, 2, &req, sizeof(req), name, len );
SetLastError(0);
CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
if (reply.handle == -1) return 0;
return reply.handle;
}
/***********************************************************************
* CreateMutex32W (KERNEL32.167)
*/
HANDLE WINAPI CreateMutexW( SECURITY_ATTRIBUTES *sa, BOOL owner,
LPCWSTR name )
{
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
HANDLE ret = CreateMutexA( sa, owner, nameA );
if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
return ret;
}
/***********************************************************************
* OpenMutex32A (KERNEL32.541)
*/
HANDLE WINAPI OpenMutexA( DWORD access, BOOL inherit, LPCSTR name )
{
struct open_mutex_request req;
struct open_mutex_reply reply;
int len = name ? strlen(name) + 1 : 0;
req.access = access;
req.inherit = inherit;
CLIENT_SendRequest( REQ_OPEN_MUTEX, -1, 2, &req, sizeof(req), name, len );
CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
if (reply.handle == -1) return 0; /* must return 0 on failure, not -1 */
return reply.handle;
}
/***********************************************************************
* OpenMutex32W (KERNEL32.542)
*/
HANDLE WINAPI OpenMutexW( DWORD access, BOOL inherit, LPCWSTR name )
{
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
HANDLE ret = OpenMutexA( access, inherit, nameA );
if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
return ret;
}
/***********************************************************************
* ReleaseMutex (KERNEL32.582)
*/
BOOL WINAPI ReleaseMutex( HANDLE handle )
{
struct release_mutex_request req;
req.handle = handle;
CLIENT_SendRequest( REQ_RELEASE_MUTEX, -1, 1, &req, sizeof(req) );
return !CLIENT_WaitReply( NULL, NULL, 0 );
}