Sweden-Number/scheduler/mutex.c

124 lines
3.7 KiB
C

/*
* Win32 mutexes
*
* Copyright 1998 Alexandre Julliard
*/
#include <assert.h>
#include "windows.h"
#include "winerror.h"
#include "k32obj.h"
#include "process.h"
#include "thread.h"
#include "heap.h"
#include "server/request.h"
#include "server.h"
typedef struct _MUTEX
{
K32OBJ header;
} MUTEX;
/***********************************************************************
* CreateMutex32A (KERNEL32.166)
*/
HANDLE32 WINAPI CreateMutex32A( SECURITY_ATTRIBUTES *sa, BOOL32 owner,
LPCSTR name )
{
struct create_mutex_request req;
struct create_mutex_reply reply;
int len = name ? strlen(name) + 1 : 0;
HANDLE32 handle;
MUTEX *mutex;
req.owned = owner;
req.inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
CLIENT_SendRequest( REQ_CREATE_MUTEX, -1, 2, &req, sizeof(req), name, len );
CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
if (reply.handle == -1) return 0;
SYSTEM_LOCK();
mutex = (MUTEX *)K32OBJ_Create( K32OBJ_MUTEX, sizeof(*mutex),
name, reply.handle, MUTEX_ALL_ACCESS,
sa, &handle );
if (mutex) K32OBJ_DecCount( &mutex->header );
if (handle == INVALID_HANDLE_VALUE32) handle = 0;
SYSTEM_UNLOCK();
return handle;
}
/***********************************************************************
* CreateMutex32W (KERNEL32.167)
*/
HANDLE32 WINAPI CreateMutex32W( SECURITY_ATTRIBUTES *sa, BOOL32 owner,
LPCWSTR name )
{
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
HANDLE32 ret = CreateMutex32A( sa, owner, nameA );
if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
return ret;
}
/***********************************************************************
* OpenMutex32A (KERNEL32.541)
*/
HANDLE32 WINAPI OpenMutex32A( DWORD access, BOOL32 inherit, LPCSTR name )
{
HANDLE32 handle = 0;
K32OBJ *obj;
struct open_named_obj_request req;
struct open_named_obj_reply reply;
int len = name ? strlen(name) + 1 : 0;
req.type = OPEN_MUTEX;
req.access = access;
req.inherit = inherit;
CLIENT_SendRequest( REQ_OPEN_NAMED_OBJ, -1, 2, &req, sizeof(req), name, len );
CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
if (reply.handle != -1)
{
SYSTEM_LOCK();
if ((obj = K32OBJ_FindNameType( name, K32OBJ_MUTEX )) != NULL)
{
handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, reply.handle );
K32OBJ_DecCount( obj );
if (handle == INVALID_HANDLE_VALUE32)
handle = 0; /* must return 0 on failure, not -1 */
}
else CLIENT_CloseHandle( reply.handle );
SYSTEM_UNLOCK();
}
return handle;
}
/***********************************************************************
* OpenMutex32W (KERNEL32.542)
*/
HANDLE32 WINAPI OpenMutex32W( DWORD access, BOOL32 inherit, LPCWSTR name )
{
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
HANDLE32 ret = OpenMutex32A( access, inherit, nameA );
if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
return ret;
}
/***********************************************************************
* ReleaseMutex (KERNEL32.582)
*/
BOOL32 WINAPI ReleaseMutex( HANDLE32 handle )
{
struct release_mutex_request req;
req.handle = HANDLE_GetServerHandle( PROCESS_Current(), handle,
K32OBJ_MUTEX, MUTEX_MODIFY_STATE );
if (req.handle == -1) return FALSE;
CLIENT_SendRequest( REQ_RELEASE_MUTEX, -1, 1, &req, sizeof(req) );
return !CLIENT_WaitReply( NULL, NULL, 0 );
}