273 lines
7.4 KiB
C
273 lines
7.4 KiB
C
/*
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* Win32 events
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*
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* Copyright 1998 Alexandre Julliard
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*/
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#include <assert.h>
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#include "windows.h"
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#include "winerror.h"
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#include "k32obj.h"
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#include "process.h"
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#include "thread.h"
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#include "heap.h"
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typedef struct
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{
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K32OBJ header;
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THREAD_QUEUE wait_queue;
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BOOL32 manual_reset;
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BOOL32 signaled;
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} EVENT;
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static BOOL32 EVENT_Signaled( K32OBJ *obj, DWORD thread_id );
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static BOOL32 EVENT_Satisfied( K32OBJ *obj, DWORD thread_id );
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static void EVENT_AddWait( K32OBJ *obj, DWORD thread_id );
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static void EVENT_RemoveWait( K32OBJ *obj, DWORD thread_id );
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static void EVENT_Destroy( K32OBJ *obj );
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const K32OBJ_OPS EVENT_Ops =
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{
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EVENT_Signaled, /* signaled */
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EVENT_Satisfied, /* satisfied */
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EVENT_AddWait, /* add_wait */
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EVENT_RemoveWait, /* remove_wait */
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EVENT_Destroy /* destroy */
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};
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/***********************************************************************
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* EVENT_Set
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*
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* Implementation of SetEvent. Used by ExitThread and ExitProcess.
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*/
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void EVENT_Set( K32OBJ *obj )
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{
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EVENT *event = (EVENT *)obj;
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assert( obj->type == K32OBJ_EVENT );
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SYSTEM_LOCK();
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event->signaled = TRUE;
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SYNC_WakeUp( &event->wait_queue, event->manual_reset ? INFINITE32 : 1 );
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SYSTEM_UNLOCK();
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}
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/***********************************************************************
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* EVENT_Create
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*
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* Partial implementation of CreateEvent.
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* Used internally by processes and threads.
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*/
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K32OBJ *EVENT_Create( BOOL32 manual_reset, BOOL32 initial_state )
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{
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EVENT *event;
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SYSTEM_LOCK();
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if ((event = HeapAlloc( SystemHeap, 0, sizeof(*event) )))
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{
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event->header.type = K32OBJ_EVENT;
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event->header.refcount = 1;
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event->wait_queue = NULL;
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event->manual_reset = manual_reset;
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event->signaled = initial_state;
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}
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SYSTEM_UNLOCK();
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return event ? &event->header : NULL;
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}
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/***********************************************************************
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* CreateEvent32A (KERNEL32.156)
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*/
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HANDLE32 WINAPI CreateEvent32A( SECURITY_ATTRIBUTES *sa, BOOL32 manual_reset,
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BOOL32 initial_state, LPCSTR name )
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{
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HANDLE32 handle;
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EVENT *event;
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SYSTEM_LOCK();
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event = (EVENT *)K32OBJ_Create( K32OBJ_EVENT, sizeof(*event),
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name, EVENT_ALL_ACCESS, &handle );
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if (event)
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{
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/* Finish initializing it */
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event->wait_queue = NULL;
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event->manual_reset = manual_reset;
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event->signaled = initial_state;
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K32OBJ_DecCount( &event->header );
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}
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SYSTEM_UNLOCK();
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return handle;
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}
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/***********************************************************************
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* CreateEvent32W (KERNEL32.157)
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*/
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HANDLE32 WINAPI CreateEvent32W( SECURITY_ATTRIBUTES *sa, BOOL32 manual_reset,
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BOOL32 initial_state, LPCWSTR name )
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{
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LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
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HANDLE32 ret = CreateEvent32A( sa, manual_reset, initial_state, nameA );
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if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
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return ret;
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}
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/***********************************************************************
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* OpenEvent32A (KERNEL32.536)
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*/
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HANDLE32 WINAPI OpenEvent32A( DWORD access, BOOL32 inherit, LPCSTR name )
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{
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HANDLE32 handle = 0;
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K32OBJ *obj;
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SYSTEM_LOCK();
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if ((obj = K32OBJ_FindNameType( name, K32OBJ_EVENT )) != NULL)
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{
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handle = HANDLE_Alloc( obj, access, inherit );
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K32OBJ_DecCount( obj );
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}
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SYSTEM_UNLOCK();
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return handle;
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}
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/***********************************************************************
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* OpenEvent32W (KERNEL32.537)
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*/
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HANDLE32 WINAPI OpenEvent32W( DWORD access, BOOL32 inherit, LPCWSTR name )
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{
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LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
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HANDLE32 ret = OpenEvent32A( access, inherit, nameA );
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if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
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return ret;
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}
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/***********************************************************************
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* PulseEvent (KERNEL32.557)
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*/
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BOOL32 WINAPI PulseEvent( HANDLE32 handle )
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{
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EVENT *event;
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SYSTEM_LOCK();
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if (!(event = (EVENT *)HANDLE_GetObjPtr( handle, K32OBJ_EVENT,
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EVENT_MODIFY_STATE )))
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{
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SYSTEM_UNLOCK();
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return FALSE;
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}
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event->signaled = TRUE;
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SYNC_WakeUp( &event->wait_queue, event->manual_reset ? INFINITE32 : 1 );
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event->signaled = FALSE;
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K32OBJ_DecCount( &event->header );
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SYSTEM_UNLOCK();
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return TRUE;
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}
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/***********************************************************************
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* SetEvent (KERNEL32.644)
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*/
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BOOL32 WINAPI SetEvent( HANDLE32 handle )
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{
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EVENT *event;
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SYSTEM_LOCK();
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if (!(event = (EVENT *)HANDLE_GetObjPtr( handle, K32OBJ_EVENT,
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EVENT_MODIFY_STATE )))
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{
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SYSTEM_UNLOCK();
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return FALSE;
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}
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event->signaled = TRUE;
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SYNC_WakeUp( &event->wait_queue, event->manual_reset ? INFINITE32 : 1 );
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K32OBJ_DecCount( &event->header );
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SYSTEM_UNLOCK();
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return TRUE;
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}
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/***********************************************************************
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* ResetEvent (KERNEL32.586)
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*/
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BOOL32 WINAPI ResetEvent( HANDLE32 handle )
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{
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EVENT *event;
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SYSTEM_LOCK();
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if (!(event = (EVENT *)HANDLE_GetObjPtr( handle, K32OBJ_EVENT,
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EVENT_MODIFY_STATE )))
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{
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SYSTEM_UNLOCK();
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return FALSE;
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}
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event->signaled = FALSE;
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K32OBJ_DecCount( &event->header );
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SYSTEM_UNLOCK();
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return TRUE;
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}
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/***********************************************************************
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* EVENT_Signaled
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*/
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static BOOL32 EVENT_Signaled( K32OBJ *obj, DWORD thread_id )
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{
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EVENT *event = (EVENT *)obj;
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assert( obj->type == K32OBJ_EVENT );
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return event->signaled;
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}
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/***********************************************************************
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* EVENT_Satisfied
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*
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* Wait on this object has been satisfied.
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*/
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static BOOL32 EVENT_Satisfied( K32OBJ *obj, DWORD thread_id )
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{
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EVENT *event = (EVENT *)obj;
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assert( obj->type == K32OBJ_EVENT );
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/* Reset if it's an auto-reset event */
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if (!event->manual_reset) event->signaled = FALSE;
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return FALSE; /* Not abandoned */
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}
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/***********************************************************************
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* EVENT_AddWait
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*
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* Add thread to object wait queue.
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*/
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static void EVENT_AddWait( K32OBJ *obj, DWORD thread_id )
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{
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EVENT *event = (EVENT *)obj;
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assert( obj->type == K32OBJ_EVENT );
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THREAD_AddQueue( &event->wait_queue, THREAD_ID_TO_THDB(thread_id) );
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}
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/***********************************************************************
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* EVENT_RemoveWait
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*
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* Remove thread from object wait queue.
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*/
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static void EVENT_RemoveWait( K32OBJ *obj, DWORD thread_id )
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{
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EVENT *event = (EVENT *)obj;
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assert( obj->type == K32OBJ_EVENT );
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THREAD_RemoveQueue( &event->wait_queue, THREAD_ID_TO_THDB(thread_id) );
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}
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/***********************************************************************
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* EVENT_Destroy
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*/
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static void EVENT_Destroy( K32OBJ *obj )
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{
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EVENT *event = (EVENT *)obj;
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assert( obj->type == K32OBJ_EVENT );
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/* There cannot be any thread on the list since the ref count is 0 */
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assert( event->wait_queue == NULL );
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obj->type = K32OBJ_UNKNOWN;
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HeapFree( SystemHeap, 0, event );
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}
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