370 lines
10 KiB
C
370 lines
10 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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#include "syslevel.h"
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#include "server/request.h"
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#include "server.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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NULL, /* read */
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NULL, /* write */
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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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struct create_event_request req;
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struct create_event_reply reply;
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int len = name ? strlen(name) + 1 : 0;
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HANDLE32 handle;
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EVENT *event;
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req.manual_reset = manual_reset;
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req.initial_state = initial_state;
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req.inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
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CLIENT_SendRequest( REQ_CREATE_EVENT, -1, 2, &req, sizeof(req), name, len );
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CLIENT_WaitReply( &len, NULL, 1, &reply, sizeof(reply) );
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CHECK_LEN( len, sizeof(reply) );
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if (reply.handle == -1) return NULL;
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SYSTEM_LOCK();
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event = (EVENT *)K32OBJ_Create( K32OBJ_EVENT, sizeof(*event), name,
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reply.handle, EVENT_ALL_ACCESS, sa, &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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* WIN16_CreateEvent (KERNEL.457)
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*/
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HANDLE32 WINAPI WIN16_CreateEvent( BOOL32 manual_reset, BOOL32 initial_state )
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{
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return CreateEvent32A( NULL, manual_reset, initial_state, NULL );
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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( PROCESS_Current(), obj, access, inherit, -1 );
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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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struct event_op_request req;
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EVENT *event;
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SYSTEM_LOCK();
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if (!(event = (EVENT *)HANDLE_GetObjPtr(PROCESS_Current(), handle,
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K32OBJ_EVENT, EVENT_MODIFY_STATE,
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&req.handle )))
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{
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SYSTEM_UNLOCK();
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return FALSE;
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}
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if (req.handle != -1)
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{
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SYSTEM_UNLOCK();
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req.op = PULSE_EVENT;
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CLIENT_SendRequest( REQ_EVENT_OP, -1, 1, &req, sizeof(req) );
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return !CLIENT_WaitReply( NULL, NULL, 0 );
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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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struct event_op_request req;
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EVENT *event;
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SYSTEM_LOCK();
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if (!(event = (EVENT *)HANDLE_GetObjPtr(PROCESS_Current(), handle,
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K32OBJ_EVENT, EVENT_MODIFY_STATE,
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&req.handle )))
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{
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SYSTEM_UNLOCK();
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return FALSE;
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}
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if (req.handle != -1)
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{
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SYSTEM_UNLOCK();
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req.op = SET_EVENT;
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CLIENT_SendRequest( REQ_EVENT_OP, -1, 1, &req, sizeof(req) );
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return !CLIENT_WaitReply( NULL, NULL, 0 );
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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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struct event_op_request req;
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EVENT *event;
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SYSTEM_LOCK();
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if (!(event = (EVENT *)HANDLE_GetObjPtr(PROCESS_Current(), handle,
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K32OBJ_EVENT, EVENT_MODIFY_STATE,
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&req.handle )))
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{
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SYSTEM_UNLOCK();
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return FALSE;
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}
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if (req.handle != -1)
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{
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SYSTEM_UNLOCK();
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req.op = RESET_EVENT;
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CLIENT_SendRequest( REQ_EVENT_OP, -1, 1, &req, sizeof(req) );
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return !CLIENT_WaitReply( NULL, NULL, 0 );
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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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/***********************************************************************
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* NOTE: The Win95 VWin32_Event routines given below are really low-level
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* routines implemented directly by VWin32. The user-mode libraries
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* implement Win32 synchronisation routines on top of these low-level
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* primitives. We do it the other way around here :-)
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*/
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/***********************************************************************
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* VWin32_EventCreate (KERNEL.442)
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*/
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HANDLE32 WINAPI VWin32_EventCreate(VOID)
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{
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return CreateEvent32A( NULL, FALSE, 0, NULL );
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}
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/***********************************************************************
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* VWin32_EventDestroy (KERNEL.443)
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*/
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VOID WINAPI VWin32_EventDestroy(HANDLE32 event)
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{
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CloseHandle( event );
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}
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/***********************************************************************
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* VWin32_EventWait (KERNEL.450)
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*/
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VOID WINAPI VWin32_EventWait(HANDLE32 event)
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{
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SYSLEVEL_ReleaseWin16Lock();
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WaitForSingleObject( event, INFINITE32 );
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SYSLEVEL_RestoreWin16Lock();
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}
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/***********************************************************************
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* VWin32_EventSet (KERNEL.451)
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*/
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VOID WINAPI VWin32_EventSet(HANDLE32 event)
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{
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SetEvent( event );
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}
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