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 const 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 static ULONG WINAPI SystemClockImpl_AddRef(IReferenceClock* iface) {
196 SystemClockImpl *This = (SystemClockImpl *)iface;
197 ULONG ref = InterlockedIncrement(&This->ref);
199 TRACE("(%p): AddRef from %ld\n", This, ref - 1);
204 static HRESULT WINAPI SystemClockImpl_QueryInterface(IReferenceClock* iface, REFIID riid, void** ppobj) {
205 SystemClockImpl *This = (SystemClockImpl *)iface;
206 TRACE("(%p, %s,%p)\n", This, debugstr_guid(riid), ppobj);
208 if (IsEqualIID (riid, &IID_IUnknown) ||
209 IsEqualIID (riid, &IID_IReferenceClock)) {
210 SystemClockImpl_AddRef(iface);
215 WARN("(%p, %s,%p): not found\n", This, debugstr_guid(riid), ppobj);
216 return E_NOINTERFACE;
219 static ULONG WINAPI SystemClockImpl_Release(IReferenceClock* iface) {
220 SystemClockImpl *This = (SystemClockImpl *)iface;
221 ULONG ref = InterlockedDecrement(&This->ref);
222 TRACE("(%p): ReleaseRef to %ld\n", This, ref);
224 if (SystemClockPostMessageToAdviseThread(This, ADVISE_EXIT)) {
225 WaitForSingleObject(This->adviseThread, INFINITE);
226 CloseHandle(This->adviseThread);
228 DeleteCriticalSection(&This->safe);
229 HeapFree(GetProcessHeap(), 0, This);
234 static HRESULT WINAPI SystemClockImpl_GetTime(IReferenceClock* iface, REFERENCE_TIME* pTime) {
235 SystemClockImpl *This = (SystemClockImpl *)iface;
236 DWORD curTimeTickCount;
239 TRACE("(%p, %p)\n", This, pTime);
245 curTimeTickCount = GetTickCount();
247 EnterCriticalSection(&This->safe);
248 /** TODO: safe this not using * 10000 */
249 This->lastRefTime += (REFERENCE_TIME) (DWORD) (curTimeTickCount - This->lastTimeTickCount) * (REFERENCE_TIME) 10000;
250 This->lastTimeTickCount = curTimeTickCount;
251 LeaveCriticalSection(&This->safe);
253 *pTime = This->lastRefTime;
254 if (This->lastTimeTickCount == curTimeTickCount) hr = S_FALSE;
255 This->lastTimeTickCount = curTimeTickCount;
259 static HRESULT WINAPI SystemClockImpl_AdviseTime(IReferenceClock* iface, REFERENCE_TIME rtBaseTime, REFERENCE_TIME rtStreamTime, HEVENT hEvent, DWORD_PTR* pdwAdviseCookie) {
260 SystemClockImpl *This = (SystemClockImpl *)iface;
261 SystemClockAdviseEntry* pEntry = NULL;
263 TRACE("(%p, %lld, %lld, %ld, %p)\n", This, rtBaseTime, rtStreamTime, hEvent, pdwAdviseCookie);
265 if ((HEVENT) 0 == hEvent) {
268 if (0 >= rtBaseTime + rtStreamTime) {
271 if (NULL == pdwAdviseCookie) {
274 pEntry = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SystemClockAdviseEntry));
275 if (NULL == pEntry) {
276 return E_OUTOFMEMORY;
279 pEntry->hEvent = (HANDLE) hEvent;
280 pEntry->rtBaseTime = rtBaseTime + rtStreamTime;
281 pEntry->rtIntervalTime = 0;
283 EnterCriticalSection(&This->safe);
284 QUARTZ_InsertAviseEntryFromQueue(This, pEntry, &This->pSingleShotAdvise);
285 LeaveCriticalSection(&This->safe);
287 SystemClockPostMessageToAdviseThread(This, ADVISE_ADD_SINGLESHOT);
289 *pdwAdviseCookie = (DWORD_PTR) (pEntry);
293 static HRESULT WINAPI SystemClockImpl_AdvisePeriodic(IReferenceClock* iface, REFERENCE_TIME rtStartTime, REFERENCE_TIME rtPeriodTime, HSEMAPHORE hSemaphore, DWORD_PTR* pdwAdviseCookie) {
294 SystemClockImpl *This = (SystemClockImpl *)iface;
295 SystemClockAdviseEntry* pEntry = NULL;
297 TRACE("(%p, %lld, %lld, %ld, %p)\n", This, rtStartTime, rtPeriodTime, hSemaphore, pdwAdviseCookie);
299 if ((HSEMAPHORE) 0 == hSemaphore) {
302 if (0 >= rtStartTime || 0 >= rtPeriodTime) {
305 if (NULL == pdwAdviseCookie) {
308 pEntry = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SystemClockAdviseEntry));
309 if (NULL == pEntry) {
310 return E_OUTOFMEMORY;
313 pEntry->hEvent = (HANDLE) hSemaphore;
314 pEntry->rtBaseTime = rtStartTime;
315 pEntry->rtIntervalTime = rtPeriodTime;
317 EnterCriticalSection(&This->safe);
318 QUARTZ_InsertAviseEntryFromQueue(This, pEntry, &This->pPeriodicAdvise);
319 LeaveCriticalSection(&This->safe);
321 SystemClockPostMessageToAdviseThread(This, ADVISE_ADD_PERIODIC);
323 *pdwAdviseCookie = (DWORD_PTR) (pEntry);
327 static HRESULT WINAPI SystemClockImpl_Unadvise(IReferenceClock* iface, DWORD_PTR dwAdviseCookie) {
328 SystemClockImpl *This = (SystemClockImpl *)iface;
329 SystemClockAdviseEntry* pEntry = NULL;
330 SystemClockAdviseEntry* it = NULL;
332 TRACE("(%p, %lu)\n", This, dwAdviseCookie);
334 pEntry = (SystemClockAdviseEntry*) dwAdviseCookie;
336 EnterCriticalSection(&This->safe);
337 for (it = This->pPeriodicAdvise; NULL != it && it != pEntry; it = it->next) ;
339 for (it = This->pSingleShotAdvise; NULL != it && it != pEntry; it = it->next) ;
346 QUARTZ_RemoveAviseEntryFromQueue(This, pEntry);
347 HeapFree(GetProcessHeap(), 0, pEntry);
349 SystemClockPostMessageToAdviseThread(This, ADVISE_REMOVE);
352 LeaveCriticalSection(&This->safe);
356 static const IReferenceClockVtbl SystemClock_Vtbl =
358 SystemClockImpl_QueryInterface,
359 SystemClockImpl_AddRef,
360 SystemClockImpl_Release,
361 SystemClockImpl_GetTime,
362 SystemClockImpl_AdviseTime,
363 SystemClockImpl_AdvisePeriodic,
364 SystemClockImpl_Unadvise
367 HRESULT QUARTZ_CreateSystemClock(IUnknown * pUnkOuter, LPVOID * ppv) {
368 SystemClockImpl* obj = NULL;
370 TRACE("(%p,%p)\n", ppv, pUnkOuter);
372 obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SystemClockImpl));
375 return E_OUTOFMEMORY;
377 obj->lpVtbl = &SystemClock_Vtbl;
378 obj->ref = 0; /* will be inited by QueryInterface */
380 obj->lastTimeTickCount = GetTickCount();
381 InitializeCriticalSection(&obj->safe);
383 return SystemClockImpl_QueryInterface((IReferenceClock*) obj, &IID_IReferenceClock, ppv);