2 * Implementation of IReferenceClock
4 * Copyright 2004 Raphael Junqueira
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #define COM_NO_WINDOWS_H
22 #include "quartz_private.h"
24 #include "wine/debug.h"
25 #include "wine/unicode.h"
29 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
31 typedef struct SystemClockAdviseEntry SystemClockAdviseEntry;
32 struct SystemClockAdviseEntry {
33 SystemClockAdviseEntry* next;
34 SystemClockAdviseEntry* prev;
37 REFERENCE_TIME rtBaseTime;
38 REFERENCE_TIME rtIntervalTime;
41 typedef struct SystemClockImpl {
42 IReferenceClockVtbl *lpVtbl;
45 /** IReferenceClock */
48 BOOL adviseThreadActive;
49 REFERENCE_TIME lastRefTime;
50 DWORD lastTimeTickCount;
51 CRITICAL_SECTION safe;
53 SystemClockAdviseEntry* pSingleShotAdvise;
54 SystemClockAdviseEntry* pPeriodicAdvise;
58 static void QUARTZ_RemoveAviseEntryFromQueue(SystemClockImpl* This, SystemClockAdviseEntry* pEntry) {
59 if (pEntry->prev) pEntry->prev->next = pEntry->next;
60 if (pEntry->next) pEntry->next->prev = pEntry->prev;
61 if (This->pSingleShotAdvise == pEntry) This->pSingleShotAdvise = pEntry->next;
62 if (This->pPeriodicAdvise == pEntry) This->pPeriodicAdvise = pEntry->next;
65 static void QUARTZ_InsertAviseEntryFromQueue(SystemClockImpl* This, SystemClockAdviseEntry* pEntry, SystemClockAdviseEntry** pQueue) {
66 SystemClockAdviseEntry* prev_it = NULL;
67 SystemClockAdviseEntry* it = NULL;
68 REFERENCE_TIME bornTime = pEntry->rtBaseTime + pEntry->rtIntervalTime;
70 for (it = *pQueue; NULL != it && (it->rtBaseTime + it->rtIntervalTime) < bornTime; it = it->next) {
73 if (NULL == prev_it) {
75 if (NULL != (*pQueue)) pEntry->next = (*pQueue)->next;
76 /*assert( NULL == pEntry->next->prev );*/
77 if (NULL != pEntry->next) pEntry->next->prev = pEntry;
80 pEntry->prev = prev_it;
81 pEntry->next = prev_it->next;
82 prev_it->next = pEntry;
83 if (NULL != pEntry->next) pEntry->next->prev = pEntry;
87 #define MAX_REFTIME (REFERENCE_TIME)(0x7FFFFFFFFFFFFFFF)
88 #define ADVISE_EXIT (WM_APP + 0)
89 #define ADVISE_REMOVE (WM_APP + 2)
90 #define ADVISE_ADD_SINGLESHOT (WM_APP + 4)
91 #define ADVISE_ADD_PERIODIC (WM_APP + 8)
93 static DWORD WINAPI SystemClockAdviseThread(LPVOID lpParam) {
94 SystemClockImpl* This = (SystemClockImpl*) lpParam;
95 DWORD timeOut = INFINITE;
99 REFERENCE_TIME curTime;
100 SystemClockAdviseEntry* it = NULL;
102 TRACE("(%p): Main Loop\n", This);
105 if (timeOut > 0) MsgWaitForMultipleObjects(0, NULL, FALSE, timeOut, QS_POSTMESSAGE|QS_SENDMESSAGE|QS_TIMER);
107 EnterCriticalSection(&This->safe);
108 /*timeOut = IReferenceClock_OnTimerUpdated(This); */
109 hr = IReferenceClock_GetTime((IReferenceClock*) This, &curTime);
115 /** First SingleShots Advice: sorted list */
116 for (it = This->pSingleShotAdvise; NULL != it && (it->rtBaseTime + it->rtIntervalTime) <= curTime; it = it->next) {
117 /** send event ... */
118 SetEvent((HANDLE) it->hEvent);
119 /** ... and Release it */
120 QUARTZ_RemoveAviseEntryFromQueue(This, it);
121 HeapFree(GetProcessHeap(), 0, it);
123 if (NULL != it) timeOut = (DWORD) ((it->rtBaseTime + it->rtIntervalTime) - curTime) / (REFERENCE_TIME)10000;
125 /** Now Periodics Advice: semi sorted list (sort cannot be used) */
126 for (it = This->pPeriodicAdvise; NULL != it; it = it->next) {
127 if (it->rtBaseTime <= curTime) {
128 DWORD nPeriods = (DWORD) ((curTime - it->rtBaseTime) / it->rtIntervalTime);
129 /** Release the semaphore ... */
130 ReleaseSemaphore((HANDLE) it->hEvent, nPeriods, NULL);
131 /** ... and refresh time */
132 it->rtBaseTime += nPeriods * it->rtIntervalTime;
133 /*assert( it->rtBaseTime + it->rtIntervalTime < curTime );*/
135 tmpTimeOut = (DWORD) ((it->rtBaseTime + it->rtIntervalTime) - curTime) / (REFERENCE_TIME)10000;
136 if (timeOut > tmpTimeOut) timeOut = tmpTimeOut;
140 LeaveCriticalSection(&This->safe);
142 while (PeekMessageA(&msg, NULL, 0, 0, PM_REMOVE)) {
143 /** if hwnd we suppose that is a windows event ... */
144 if (NULL != msg.hwnd) {
145 TranslateMessage(&msg);
146 DispatchMessageA(&msg);
148 switch (msg.message) {
152 case ADVISE_ADD_SINGLESHOT:
153 case ADVISE_ADD_PERIODIC:
154 /** set timeout to 0 to do a rescan now */
158 /** hmmmm what we can do here ... */
162 ERR("Unhandled message %u. Critical Path\n", msg.message);
170 TRACE("(%p): Exiting\n", This);
173 /*static DWORD WINAPI SystemClockAdviseThread(LPVOID lpParam) { */
175 static BOOL SystemClockPostMessageToAdviseThread(SystemClockImpl* This, UINT iMsg) {
176 if (FALSE == This->adviseThreadActive) {
178 This->adviseThread = CreateThread(NULL, 0, SystemClockAdviseThread, This, 0, &This->adviseThreadId);
179 if (NULL == This->adviseThread) return FALSE;
180 SetThreadPriority(This->adviseThread, THREAD_PRIORITY_TIME_CRITICAL);
181 This->adviseThreadActive = TRUE;
183 res = PostThreadMessageA(This->adviseThreadId, iMsg, 0, 0);
184 /* Let the thread creates its message queue (with MsgWaitForMultipleObjects call) by yielding and retrying */
185 if (!res && (GetLastError() == ERROR_INVALID_THREAD_ID))
192 return PostThreadMessageA(This->adviseThreadId, iMsg, 0, 0);
195 IReferenceClockVtbl SystemClock_Vtbl;
197 static ULONG WINAPI SystemClockImpl_AddRef(IReferenceClock* iface) {
198 SystemClockImpl *This = (SystemClockImpl *)iface;
199 ULONG ref = InterlockedIncrement(&This->ref);
201 TRACE("(%p): AddRef from %ld\n", This, ref - 1);
206 static HRESULT WINAPI SystemClockImpl_QueryInterface(IReferenceClock* iface, REFIID riid, void** ppobj) {
207 SystemClockImpl *This = (SystemClockImpl *)iface;
208 TRACE("(%p, %s,%p)\n", This, debugstr_guid(riid), ppobj);
210 if (IsEqualIID (riid, &IID_IUnknown) ||
211 IsEqualIID (riid, &IID_IReferenceClock)) {
212 SystemClockImpl_AddRef(iface);
217 WARN("(%p, %s,%p): not found\n", This, debugstr_guid(riid), ppobj);
218 return E_NOINTERFACE;
221 static ULONG WINAPI SystemClockImpl_Release(IReferenceClock* iface) {
222 SystemClockImpl *This = (SystemClockImpl *)iface;
223 ULONG ref = InterlockedDecrement(&This->ref);
224 TRACE("(%p): ReleaseRef to %ld\n", This, ref);
226 if (SystemClockPostMessageToAdviseThread(This, ADVISE_EXIT)) {
227 WaitForSingleObject(This->adviseThread, INFINITE);
228 CloseHandle(This->adviseThread);
230 DeleteCriticalSection(&This->safe);
231 HeapFree(GetProcessHeap(), 0, This);
236 static HRESULT WINAPI SystemClockImpl_GetTime(IReferenceClock* iface, REFERENCE_TIME* pTime) {
237 SystemClockImpl *This = (SystemClockImpl *)iface;
238 DWORD curTimeTickCount;
241 TRACE("(%p, %p)\n", This, pTime);
247 curTimeTickCount = GetTickCount();
249 EnterCriticalSection(&This->safe);
250 /** TODO: safe this not using * 10000 */
251 This->lastRefTime += (REFERENCE_TIME) (DWORD) (curTimeTickCount - This->lastTimeTickCount) * (REFERENCE_TIME) 10000;
252 This->lastTimeTickCount = curTimeTickCount;
253 LeaveCriticalSection(&This->safe);
255 *pTime = This->lastRefTime;
256 if (This->lastTimeTickCount == curTimeTickCount) hr = S_FALSE;
257 This->lastTimeTickCount = curTimeTickCount;
261 static HRESULT WINAPI SystemClockImpl_AdviseTime(IReferenceClock* iface, REFERENCE_TIME rtBaseTime, REFERENCE_TIME rtStreamTime, HEVENT hEvent, DWORD_PTR* pdwAdviseCookie) {
262 SystemClockImpl *This = (SystemClockImpl *)iface;
263 SystemClockAdviseEntry* pEntry = NULL;
265 TRACE("(%p, %lld, %lld, %ld, %p)\n", This, rtBaseTime, rtStreamTime, hEvent, pdwAdviseCookie);
267 if ((HEVENT) 0 == hEvent) {
270 if (0 >= rtBaseTime + rtStreamTime) {
273 if (NULL == pdwAdviseCookie) {
276 pEntry = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SystemClockAdviseEntry));
277 if (NULL == pEntry) {
278 return E_OUTOFMEMORY;
281 pEntry->hEvent = (HANDLE) hEvent;
282 pEntry->rtBaseTime = rtBaseTime + rtStreamTime;
283 pEntry->rtIntervalTime = 0;
285 EnterCriticalSection(&This->safe);
286 QUARTZ_InsertAviseEntryFromQueue(This, pEntry, &This->pSingleShotAdvise);
287 LeaveCriticalSection(&This->safe);
289 SystemClockPostMessageToAdviseThread(This, ADVISE_ADD_SINGLESHOT);
291 *pdwAdviseCookie = (DWORD_PTR) (pEntry);
295 static HRESULT WINAPI SystemClockImpl_AdvisePeriodic(IReferenceClock* iface, REFERENCE_TIME rtStartTime, REFERENCE_TIME rtPeriodTime, HSEMAPHORE hSemaphore, DWORD_PTR* pdwAdviseCookie) {
296 SystemClockImpl *This = (SystemClockImpl *)iface;
297 SystemClockAdviseEntry* pEntry = NULL;
299 TRACE("(%p, %lld, %lld, %ld, %p)\n", This, rtStartTime, rtPeriodTime, hSemaphore, pdwAdviseCookie);
301 if ((HSEMAPHORE) 0 == hSemaphore) {
304 if (0 >= rtStartTime || 0 >= rtPeriodTime) {
307 if (NULL == pdwAdviseCookie) {
310 pEntry = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SystemClockAdviseEntry));
311 if (NULL == pEntry) {
312 return E_OUTOFMEMORY;
315 pEntry->hEvent = (HANDLE) hSemaphore;
316 pEntry->rtBaseTime = rtStartTime;
317 pEntry->rtIntervalTime = rtPeriodTime;
319 EnterCriticalSection(&This->safe);
320 QUARTZ_InsertAviseEntryFromQueue(This, pEntry, &This->pPeriodicAdvise);
321 LeaveCriticalSection(&This->safe);
323 SystemClockPostMessageToAdviseThread(This, ADVISE_ADD_PERIODIC);
325 *pdwAdviseCookie = (DWORD_PTR) (pEntry);
329 static HRESULT WINAPI SystemClockImpl_Unadvise(IReferenceClock* iface, DWORD_PTR dwAdviseCookie) {
330 SystemClockImpl *This = (SystemClockImpl *)iface;
331 SystemClockAdviseEntry* pEntry = NULL;
332 SystemClockAdviseEntry* it = NULL;
334 TRACE("(%p, %lu)\n", This, dwAdviseCookie);
336 pEntry = (SystemClockAdviseEntry*) dwAdviseCookie;
338 EnterCriticalSection(&This->safe);
339 for (it = This->pPeriodicAdvise; NULL != it && it != pEntry; it = it->next) ;
341 for (it = This->pSingleShotAdvise; NULL != it && it != pEntry; it = it->next) ;
348 QUARTZ_RemoveAviseEntryFromQueue(This, pEntry);
349 HeapFree(GetProcessHeap(), 0, pEntry);
351 SystemClockPostMessageToAdviseThread(This, ADVISE_REMOVE);
354 LeaveCriticalSection(&This->safe);
358 IReferenceClockVtbl SystemClock_Vtbl =
360 SystemClockImpl_QueryInterface,
361 SystemClockImpl_AddRef,
362 SystemClockImpl_Release,
363 SystemClockImpl_GetTime,
364 SystemClockImpl_AdviseTime,
365 SystemClockImpl_AdvisePeriodic,
366 SystemClockImpl_Unadvise
369 HRESULT QUARTZ_CreateSystemClock(IUnknown * pUnkOuter, LPVOID * ppv) {
370 SystemClockImpl* obj = NULL;
372 TRACE("(%p,%p)\n", ppv, pUnkOuter);
374 obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SystemClockImpl));
377 return E_OUTOFMEMORY;
379 obj->lpVtbl = &SystemClock_Vtbl;
380 obj->ref = 0; /* will be inited by QueryInterface */
382 obj->lastTimeTickCount = GetTickCount();
383 InitializeCriticalSection(&obj->safe);
385 return SystemClockImpl_QueryInterface((IReferenceClock*) obj, &IID_IReferenceClock, ppv);