Sweden-Number/scheduler/event.c

370 lines
10 KiB
C

/*
* Win32 events
*
* 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 "syslevel.h"
#include "server/request.h"
#include "server.h"
typedef struct
{
K32OBJ header;
THREAD_QUEUE wait_queue;
BOOL32 manual_reset;
BOOL32 signaled;
} EVENT;
static BOOL32 EVENT_Signaled( K32OBJ *obj, DWORD thread_id );
static BOOL32 EVENT_Satisfied( K32OBJ *obj, DWORD thread_id );
static void EVENT_AddWait( K32OBJ *obj, DWORD thread_id );
static void EVENT_RemoveWait( K32OBJ *obj, DWORD thread_id );
static void EVENT_Destroy( K32OBJ *obj );
const K32OBJ_OPS EVENT_Ops =
{
EVENT_Signaled, /* signaled */
EVENT_Satisfied, /* satisfied */
EVENT_AddWait, /* add_wait */
EVENT_RemoveWait, /* remove_wait */
NULL, /* read */
NULL, /* write */
EVENT_Destroy /* destroy */
};
/***********************************************************************
* EVENT_Set
*
* Implementation of SetEvent. Used by ExitThread and ExitProcess.
*/
void EVENT_Set( K32OBJ *obj )
{
EVENT *event = (EVENT *)obj;
assert( obj->type == K32OBJ_EVENT );
SYSTEM_LOCK();
event->signaled = TRUE;
SYNC_WakeUp( &event->wait_queue, event->manual_reset ? INFINITE32 : 1 );
SYSTEM_UNLOCK();
}
/***********************************************************************
* EVENT_Create
*
* Partial implementation of CreateEvent.
* Used internally by processes and threads.
*/
K32OBJ *EVENT_Create( BOOL32 manual_reset, BOOL32 initial_state )
{
EVENT *event;
SYSTEM_LOCK();
if ((event = HeapAlloc( SystemHeap, 0, sizeof(*event) )))
{
event->header.type = K32OBJ_EVENT;
event->header.refcount = 1;
event->wait_queue = NULL;
event->manual_reset = manual_reset;
event->signaled = initial_state;
}
SYSTEM_UNLOCK();
return event ? &event->header : NULL;
}
/***********************************************************************
* CreateEvent32A (KERNEL32.156)
*/
HANDLE32 WINAPI CreateEvent32A( SECURITY_ATTRIBUTES *sa, BOOL32 manual_reset,
BOOL32 initial_state, LPCSTR name )
{
struct create_event_request req;
struct create_event_reply reply;
int len = name ? strlen(name) + 1 : 0;
HANDLE32 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_WaitReply( &len, NULL, 1, &reply, sizeof(reply) );
CHECK_LEN( len, sizeof(reply) );
if (reply.handle == -1) return NULL;
SYSTEM_LOCK();
event = (EVENT *)K32OBJ_Create( K32OBJ_EVENT, sizeof(*event), name,
reply.handle, EVENT_ALL_ACCESS, sa, &handle );
if (event)
{
/* Finish initializing it */
event->wait_queue = NULL;
event->manual_reset = manual_reset;
event->signaled = initial_state;
K32OBJ_DecCount( &event->header );
}
SYSTEM_UNLOCK();
return handle;
}
/***********************************************************************
* CreateEvent32W (KERNEL32.157)
*/
HANDLE32 WINAPI CreateEvent32W( SECURITY_ATTRIBUTES *sa, BOOL32 manual_reset,
BOOL32 initial_state, LPCWSTR name )
{
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
HANDLE32 ret = CreateEvent32A( sa, manual_reset, initial_state, nameA );
if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
return ret;
}
/***********************************************************************
* WIN16_CreateEvent (KERNEL.457)
*/
HANDLE32 WINAPI WIN16_CreateEvent( BOOL32 manual_reset, BOOL32 initial_state )
{
return CreateEvent32A( NULL, manual_reset, initial_state, NULL );
}
/***********************************************************************
* OpenEvent32A (KERNEL32.536)
*/
HANDLE32 WINAPI OpenEvent32A( DWORD access, BOOL32 inherit, LPCSTR name )
{
HANDLE32 handle = 0;
K32OBJ *obj;
SYSTEM_LOCK();
if ((obj = K32OBJ_FindNameType( name, K32OBJ_EVENT )) != NULL)
{
handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, -1 );
K32OBJ_DecCount( obj );
}
SYSTEM_UNLOCK();
return handle;
}
/***********************************************************************
* OpenEvent32W (KERNEL32.537)
*/
HANDLE32 WINAPI OpenEvent32W( DWORD access, BOOL32 inherit, LPCWSTR name )
{
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
HANDLE32 ret = OpenEvent32A( access, inherit, nameA );
if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
return ret;
}
/***********************************************************************
* PulseEvent (KERNEL32.557)
*/
BOOL32 WINAPI PulseEvent( HANDLE32 handle )
{
struct event_op_request req;
EVENT *event;
SYSTEM_LOCK();
if (!(event = (EVENT *)HANDLE_GetObjPtr(PROCESS_Current(), handle,
K32OBJ_EVENT, EVENT_MODIFY_STATE,
&req.handle )))
{
SYSTEM_UNLOCK();
return FALSE;
}
if (req.handle != -1)
{
SYSTEM_UNLOCK();
req.op = PULSE_EVENT;
CLIENT_SendRequest( REQ_EVENT_OP, -1, 1, &req, sizeof(req) );
return !CLIENT_WaitReply( NULL, NULL, 0 );
}
event->signaled = TRUE;
SYNC_WakeUp( &event->wait_queue, event->manual_reset ? INFINITE32 : 1 );
event->signaled = FALSE;
K32OBJ_DecCount( &event->header );
SYSTEM_UNLOCK();
return TRUE;
}
/***********************************************************************
* SetEvent (KERNEL32.644)
*/
BOOL32 WINAPI SetEvent( HANDLE32 handle )
{
struct event_op_request req;
EVENT *event;
SYSTEM_LOCK();
if (!(event = (EVENT *)HANDLE_GetObjPtr(PROCESS_Current(), handle,
K32OBJ_EVENT, EVENT_MODIFY_STATE,
&req.handle )))
{
SYSTEM_UNLOCK();
return FALSE;
}
if (req.handle != -1)
{
SYSTEM_UNLOCK();
req.op = SET_EVENT;
CLIENT_SendRequest( REQ_EVENT_OP, -1, 1, &req, sizeof(req) );
return !CLIENT_WaitReply( NULL, NULL, 0 );
}
event->signaled = TRUE;
SYNC_WakeUp( &event->wait_queue, event->manual_reset ? INFINITE32 : 1 );
K32OBJ_DecCount( &event->header );
SYSTEM_UNLOCK();
return TRUE;
}
/***********************************************************************
* ResetEvent (KERNEL32.586)
*/
BOOL32 WINAPI ResetEvent( HANDLE32 handle )
{
struct event_op_request req;
EVENT *event;
SYSTEM_LOCK();
if (!(event = (EVENT *)HANDLE_GetObjPtr(PROCESS_Current(), handle,
K32OBJ_EVENT, EVENT_MODIFY_STATE,
&req.handle )))
{
SYSTEM_UNLOCK();
return FALSE;
}
if (req.handle != -1)
{
SYSTEM_UNLOCK();
req.op = RESET_EVENT;
CLIENT_SendRequest( REQ_EVENT_OP, -1, 1, &req, sizeof(req) );
return !CLIENT_WaitReply( NULL, NULL, 0 );
}
event->signaled = FALSE;
K32OBJ_DecCount( &event->header );
SYSTEM_UNLOCK();
return TRUE;
}
/***********************************************************************
* EVENT_Signaled
*/
static BOOL32 EVENT_Signaled( K32OBJ *obj, DWORD thread_id )
{
EVENT *event = (EVENT *)obj;
assert( obj->type == K32OBJ_EVENT );
return event->signaled;
}
/***********************************************************************
* EVENT_Satisfied
*
* Wait on this object has been satisfied.
*/
static BOOL32 EVENT_Satisfied( K32OBJ *obj, DWORD thread_id )
{
EVENT *event = (EVENT *)obj;
assert( obj->type == K32OBJ_EVENT );
/* Reset if it's an auto-reset event */
if (!event->manual_reset) event->signaled = FALSE;
return FALSE; /* Not abandoned */
}
/***********************************************************************
* EVENT_AddWait
*
* Add thread to object wait queue.
*/
static void EVENT_AddWait( K32OBJ *obj, DWORD thread_id )
{
EVENT *event = (EVENT *)obj;
assert( obj->type == K32OBJ_EVENT );
THREAD_AddQueue( &event->wait_queue, THREAD_ID_TO_THDB(thread_id) );
}
/***********************************************************************
* EVENT_RemoveWait
*
* Remove thread from object wait queue.
*/
static void EVENT_RemoveWait( K32OBJ *obj, DWORD thread_id )
{
EVENT *event = (EVENT *)obj;
assert( obj->type == K32OBJ_EVENT );
THREAD_RemoveQueue( &event->wait_queue, THREAD_ID_TO_THDB(thread_id) );
}
/***********************************************************************
* EVENT_Destroy
*/
static void EVENT_Destroy( K32OBJ *obj )
{
EVENT *event = (EVENT *)obj;
assert( obj->type == K32OBJ_EVENT );
/* There cannot be any thread on the list since the ref count is 0 */
assert( event->wait_queue == NULL );
obj->type = K32OBJ_UNKNOWN;
HeapFree( SystemHeap, 0, 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)
*/
HANDLE32 WINAPI VWin32_EventCreate(VOID)
{
return CreateEvent32A( NULL, FALSE, 0, NULL );
}
/***********************************************************************
* VWin32_EventDestroy (KERNEL.443)
*/
VOID WINAPI VWin32_EventDestroy(HANDLE32 event)
{
CloseHandle( event );
}
/***********************************************************************
* VWin32_EventWait (KERNEL.450)
*/
VOID WINAPI VWin32_EventWait(HANDLE32 event)
{
SYSLEVEL_ReleaseWin16Lock();
WaitForSingleObject( event, INFINITE32 );
SYSLEVEL_RestoreWin16Lock();
}
/***********************************************************************
* VWin32_EventSet (KERNEL.451)
*/
VOID WINAPI VWin32_EventSet(HANDLE32 event)
{
SetEvent( event );
}