Sweden-Number/scheduler/event.c

207 lines
5.9 KiB
C

/*
* Win32 events
*
* Copyright 1998 Alexandre Julliard
*/
#include <assert.h>
#include "winerror.h"
#include "k32obj.h"
#include "process.h"
#include "thread.h"
#include "heap.h"
#include "syslevel.h"
#include "server/request.h"
#include "server.h"
typedef struct
{
K32OBJ header;
} EVENT;
/***********************************************************************
* CreateEvent32A (KERNEL32.156)
*/
HANDLE WINAPI CreateEventA( SECURITY_ATTRIBUTES *sa, BOOL manual_reset,
BOOL initial_state, LPCSTR name )
{
struct create_event_request req;
struct create_event_reply reply;
int len = name ? strlen(name) + 1 : 0;
HANDLE handle;
EVENT *event;
req.manual_reset = manual_reset;
req.initial_state = initial_state;
req.inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
CLIENT_SendRequest( REQ_CREATE_EVENT, -1, 2, &req, sizeof(req), name, len );
CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
if (reply.handle == -1) return 0;
SYSTEM_LOCK();
event = (EVENT *)K32OBJ_Create( K32OBJ_EVENT, sizeof(*event), name,
reply.handle, EVENT_ALL_ACCESS, sa, &handle );
if (event)
K32OBJ_DecCount( &event->header );
SYSTEM_UNLOCK();
if (handle == INVALID_HANDLE_VALUE) handle = 0;
return handle;
}
/***********************************************************************
* CreateEvent32W (KERNEL32.157)
*/
HANDLE WINAPI CreateEventW( SECURITY_ATTRIBUTES *sa, BOOL manual_reset,
BOOL initial_state, LPCWSTR name )
{
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
HANDLE ret = CreateEventA( sa, manual_reset, initial_state, nameA );
if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
return ret;
}
/***********************************************************************
* WIN16_CreateEvent (KERNEL.457)
*/
HANDLE WINAPI WIN16_CreateEvent( BOOL manual_reset, BOOL initial_state )
{
return CreateEventA( NULL, manual_reset, initial_state, NULL );
}
/***********************************************************************
* OpenEvent32A (KERNEL32.536)
*/
HANDLE WINAPI OpenEventA( DWORD access, BOOL inherit, LPCSTR name )
{
HANDLE 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_EVENT;
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_EVENT )) != NULL)
{
handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, reply.handle );
K32OBJ_DecCount( obj );
if (handle == INVALID_HANDLE_VALUE)
handle = 0; /* must return 0 on failure, not -1 */
}
else CLIENT_CloseHandle( reply.handle );
SYSTEM_UNLOCK();
}
return handle;
}
/***********************************************************************
* OpenEvent32W (KERNEL32.537)
*/
HANDLE WINAPI OpenEventW( DWORD access, BOOL inherit, LPCWSTR name )
{
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
HANDLE ret = OpenEventA( access, inherit, nameA );
if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
return ret;
}
/***********************************************************************
* EVENT_Operation
*
* Execute an event operation (set,reset,pulse).
*/
static BOOL EVENT_Operation( HANDLE handle, enum event_op op )
{
struct event_op_request req;
req.handle = HANDLE_GetServerHandle( PROCESS_Current(), handle,
K32OBJ_EVENT, EVENT_MODIFY_STATE );
if (req.handle == -1) return FALSE;
req.op = op;
CLIENT_SendRequest( REQ_EVENT_OP, -1, 1, &req, sizeof(req) );
return !CLIENT_WaitReply( NULL, NULL, 0 );
}
/***********************************************************************
* PulseEvent (KERNEL32.557)
*/
BOOL WINAPI PulseEvent( HANDLE handle )
{
return EVENT_Operation( handle, PULSE_EVENT );
}
/***********************************************************************
* SetEvent (KERNEL32.644)
*/
BOOL WINAPI SetEvent( HANDLE handle )
{
return EVENT_Operation( handle, SET_EVENT );
}
/***********************************************************************
* ResetEvent (KERNEL32.586)
*/
BOOL WINAPI ResetEvent( HANDLE handle )
{
return EVENT_Operation( handle, RESET_EVENT );
}
/***********************************************************************
* NOTE: The Win95 VWin32_Event routines given below are really low-level
* routines implemented directly by VWin32. The user-mode libraries
* implement Win32 synchronisation routines on top of these low-level
* primitives. We do it the other way around here :-)
*/
/***********************************************************************
* VWin32_EventCreate (KERNEL.442)
*/
HANDLE WINAPI VWin32_EventCreate(VOID)
{
HANDLE hEvent = CreateEventA( NULL, FALSE, 0, NULL );
return ConvertToGlobalHandle( hEvent );
}
/***********************************************************************
* VWin32_EventDestroy (KERNEL.443)
*/
VOID WINAPI VWin32_EventDestroy(HANDLE event)
{
CloseHandle( event );
}
/***********************************************************************
* VWin32_EventWait (KERNEL.450)
*/
VOID WINAPI VWin32_EventWait(HANDLE event)
{
SYSLEVEL_ReleaseWin16Lock();
WaitForSingleObject( event, INFINITE );
SYSLEVEL_RestoreWin16Lock();
}
/***********************************************************************
* VWin32_EventSet (KERNEL.451)
*/
VOID WINAPI VWin32_EventSet(HANDLE event)
{
SetEvent( event );
}