dlls/quartz/systemclock.c

   1 /*
   2  * Implementation of IReferenceClock
   3  *
   4  * Copyright 2004 Raphael Junqueira
   5  *
   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.
  10  *
  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.
  15  *
  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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "quartz_private.h"
  22
  23 #include "wine/debug.h"
  24 #include "wine/unicode.h"
  25 #include "uuids.h"
  26 #include <assert.h>
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  29
  30 typedef struct SystemClockAdviseEntry SystemClockAdviseEntry;
  31 struct SystemClockAdviseEntry {
  32   SystemClockAdviseEntry* next;
  33   SystemClockAdviseEntry* prev;
  34
  35   HANDLE           hEvent;
  36   REFERENCE_TIME   rtBaseTime;
  37   REFERENCE_TIME   rtIntervalTime;
  38 };
  39
  40 typedef struct SystemClockImpl {
  41   const IReferenceClockVtbl *lpVtbl;
  42   LONG ref;
  43
  44   /** IReferenceClock */
  45   HANDLE         adviseThread;
  46   DWORD          adviseThreadId;
  47   BOOL           adviseThreadActive;
  48   REFERENCE_TIME lastRefTime;
  49   DWORD          lastTimeTickCount;
  50   CRITICAL_SECTION safe;
  51
  52   SystemClockAdviseEntry* pSingleShotAdvise;
  53   SystemClockAdviseEntry* pPeriodicAdvise;
  54 } SystemClockImpl;
  55
  56
  57 static void QUARTZ_RemoveAviseEntryFromQueue(SystemClockImpl* This, SystemClockAdviseEntry* pEntry) {
  58   if (pEntry->prev) pEntry->prev->next = pEntry->next;
  59   if (pEntry->next) pEntry->next->prev = pEntry->prev;
  60   if (This->pSingleShotAdvise == pEntry) This->pSingleShotAdvise = pEntry->next;
  61   if (This->pPeriodicAdvise == pEntry)    This->pPeriodicAdvise = pEntry->next;
  62 }
  63
  64 static void QUARTZ_InsertAviseEntryFromQueue(SystemClockImpl* This, SystemClockAdviseEntry* pEntry, SystemClockAdviseEntry** pQueue) {
  65   SystemClockAdviseEntry* prev_it = NULL;
  66   SystemClockAdviseEntry* it = NULL;
  67   REFERENCE_TIME bornTime =  pEntry->rtBaseTime + pEntry->rtIntervalTime;
  68
  69   for (it = *pQueue; NULL != it && (it->rtBaseTime + it->rtIntervalTime) < bornTime; it = it->next) {
  70     prev_it = it;
  71   }
  72   if (NULL == prev_it) {
  73     pEntry->prev = NULL;
  74     if (NULL != (*pQueue)) pEntry->next = (*pQueue)->next;
  75     /*assert( NULL == pEntry->next->prev );*/
  76     if (NULL != pEntry->next) pEntry->next->prev = pEntry;
  77     (*pQueue) = pEntry;
  78   } else {
  79     pEntry->prev = prev_it;
  80     pEntry->next = prev_it->next;
  81     prev_it->next = pEntry;
  82     if (NULL != pEntry->next) pEntry->next->prev = pEntry;
  83   }
  84 }
  85
  86 #define MAX_REFTIME            (REFERENCE_TIME)(0x7FFFFFFFFFFFFFFF)
  87 #define ADVISE_EXIT            (WM_APP + 0)
  88 #define ADVISE_REMOVE          (WM_APP + 2)
  89 #define ADVISE_ADD_SINGLESHOT  (WM_APP + 4)
  90 #define ADVISE_ADD_PERIODIC    (WM_APP + 8)
  91
  92 static DWORD WINAPI SystemClockAdviseThread(LPVOID lpParam) {
  93   SystemClockImpl* This = (SystemClockImpl*) lpParam;
  94   DWORD timeOut = INFINITE;
  95   DWORD tmpTimeOut;
  96   MSG msg;
  97   HRESULT hr;
  98   REFERENCE_TIME curTime;
  99   SystemClockAdviseEntry* it = NULL;
 100
 101   TRACE("(%p): Main Loop\n", This);
 102
 103   while (TRUE) {
 104     if (timeOut > 0) MsgWaitForMultipleObjects(0, NULL, FALSE, timeOut, QS_POSTMESSAGE|QS_SENDMESSAGE|QS_TIMER);
 105
 106     EnterCriticalSection(&This->safe);
 107     /*timeOut = IReferenceClock_OnTimerUpdated(This); */
 108     hr = IReferenceClock_GetTime((IReferenceClock*) This, &curTime);
 109     if (FAILED(hr)) {
 110       timeOut = INFINITE;
 111       goto outrefresh;
 112     }
 113
 114     /** First SingleShots Advice: sorted list */
 115     for (it = This->pSingleShotAdvise; NULL != it && (it->rtBaseTime + it->rtIntervalTime) <= curTime; it = it->next) {
 116       /** send event ... */
 117       SetEvent((HANDLE) it->hEvent);
 118       /** ... and Release it */
 119       QUARTZ_RemoveAviseEntryFromQueue(This, it);
 120       HeapFree(GetProcessHeap(), 0, it);
 121     }
 122     if (NULL != it) timeOut = (DWORD) ((it->rtBaseTime + it->rtIntervalTime) - curTime) / (REFERENCE_TIME)10000;
 123
 124     /** Now Periodics Advice: semi sorted list (sort cannot be used) */
 125     for (it = This->pPeriodicAdvise; NULL != it; it = it->next) {
 126       if (it->rtBaseTime <= curTime) {
 127         DWORD nPeriods = (DWORD) ((curTime - it->rtBaseTime) / it->rtIntervalTime);
 128         /** Release the semaphore ... */
 129         ReleaseSemaphore((HANDLE) it->hEvent, nPeriods, NULL);
 130         /** ... and refresh time */
 131         it->rtBaseTime += nPeriods * it->rtIntervalTime;
 132         /*assert( it->rtBaseTime + it->rtIntervalTime < curTime );*/
 133       }
 134       tmpTimeOut = (DWORD) ((it->rtBaseTime + it->rtIntervalTime) - curTime) / (REFERENCE_TIME)10000;
 135       if (timeOut > tmpTimeOut) timeOut = tmpTimeOut;
 136     }
 137
 138 outrefresh:
 139     LeaveCriticalSection(&This->safe);
 140
 141     while (PeekMessageA(&msg, NULL, 0, 0, PM_REMOVE)) {
 142       /** if hwnd we suppose that is a windows event ... */
 143       if  (NULL != msg.hwnd) {
 144         TranslateMessage(&msg);
 145         DispatchMessageA(&msg);
 146       } else {
 147         switch (msg.message) {
 148         case WM_QUIT:
 149         case ADVISE_EXIT:
 150           goto outofthread;
 151         case ADVISE_ADD_SINGLESHOT:
 152         case ADVISE_ADD_PERIODIC:
 153           /** set timeout to 0 to do a rescan now */
 154           timeOut = 0;
 155           break;
 156         case ADVISE_REMOVE:
 157           /** hmmmm what we can do here ... */
 158           timeOut = INFINITE;
 159           break;
 160         default:
 161           ERR("Unhandled message %u. Critical Path\n", msg.message);
 162           break;
 163         }
 164       }
 165     }
 166   }
 167
 168 outofthread:
 169   TRACE("(%p): Exiting\n", This);
 170   return 0;
 171 }
 172 /*static DWORD WINAPI SystemClockAdviseThread(LPVOID lpParam) { */
 173
 174 static BOOL SystemClockPostMessageToAdviseThread(SystemClockImpl* This, UINT iMsg) {
 175   if (FALSE == This->adviseThreadActive) {
 176     BOOL res;
 177     This->adviseThread = CreateThread(NULL, 0, SystemClockAdviseThread, This, 0, &This->adviseThreadId);
 178     if (NULL == This->adviseThread) return FALSE;
 179     SetThreadPriority(This->adviseThread, THREAD_PRIORITY_TIME_CRITICAL);
 180     This->adviseThreadActive = TRUE;
 181     while(1) {
 182       res = PostThreadMessageA(This->adviseThreadId, iMsg, 0, 0);
 183       /* Let the thread creates its message queue (with MsgWaitForMultipleObjects call) by yielding and retrying */
 184       if (!res && (GetLastError() == ERROR_INVALID_THREAD_ID))
 185         Sleep(0);
 186       else
 187         break;
 188     }
 189     return res;
 190   }
 191   return PostThreadMessageA(This->adviseThreadId, iMsg, 0, 0);
 192 }
 193
 194 static ULONG WINAPI SystemClockImpl_AddRef(IReferenceClock* iface) {
 195   SystemClockImpl *This = (SystemClockImpl *)iface;
 196   ULONG ref = InterlockedIncrement(&This->ref);
 197
 198   TRACE("(%p): AddRef from %d\n", This, ref - 1);
 199
 200   return ref;
 201 }
 202
 203 static HRESULT WINAPI SystemClockImpl_QueryInterface(IReferenceClock* iface, REFIID riid, void** ppobj) {
 204   SystemClockImpl *This = (SystemClockImpl *)iface;
 205   TRACE("(%p, %s,%p)\n", This, debugstr_guid(riid), ppobj);
 206
 207   if (IsEqualIID (riid, &IID_IUnknown) ||
 208       IsEqualIID (riid, &IID_IReferenceClock)) {
 209     SystemClockImpl_AddRef(iface);
 210     *ppobj = This;
 211     return S_OK;
 212   }
 213
 214   WARN("(%p, %s,%p): not found\n", This, debugstr_guid(riid), ppobj);
 215   return E_NOINTERFACE;
 216 }
 217
 218 static ULONG WINAPI SystemClockImpl_Release(IReferenceClock* iface) {
 219   SystemClockImpl *This = (SystemClockImpl *)iface;
 220   ULONG ref = InterlockedDecrement(&This->ref);
 221   TRACE("(%p): ReleaseRef to %d\n", This, ref);
 222   if (ref == 0) {
 223     if (SystemClockPostMessageToAdviseThread(This, ADVISE_EXIT)) {
 224       WaitForSingleObject(This->adviseThread, INFINITE);
 225       CloseHandle(This->adviseThread);
 226     }
 227     DeleteCriticalSection(&This->safe);
 228     HeapFree(GetProcessHeap(), 0, This);
 229   }
 230   return ref;
 231 }
 232
 233 static HRESULT WINAPI SystemClockImpl_GetTime(IReferenceClock* iface, REFERENCE_TIME* pTime) {
 234   SystemClockImpl *This = (SystemClockImpl *)iface;
 235   DWORD curTimeTickCount;
 236   HRESULT hr = S_OK;
 237
 238   TRACE("(%p, %p)\n", This, pTime);
 239
 240   if (NULL == pTime) {
 241     return E_POINTER;
 242   }
 243
 244   curTimeTickCount = GetTickCount();
 245
 246   EnterCriticalSection(&This->safe);
 247   /** TODO: safe this not using * 10000 */
 248   This->lastRefTime += (REFERENCE_TIME) (DWORD) (curTimeTickCount - This->lastTimeTickCount) * (REFERENCE_TIME) 10000;
 249   This->lastTimeTickCount = curTimeTickCount;
 250   LeaveCriticalSection(&This->safe);
 251
 252   *pTime = This->lastRefTime;
 253   if (This->lastTimeTickCount == curTimeTickCount) hr = S_FALSE;
 254   This->lastTimeTickCount = curTimeTickCount;
 255   return hr;
 256 }
 257
 258 static HRESULT WINAPI SystemClockImpl_AdviseTime(IReferenceClock* iface, REFERENCE_TIME rtBaseTime, REFERENCE_TIME rtStreamTime, HEVENT hEvent, DWORD_PTR* pdwAdviseCookie) {
 259   SystemClockImpl *This = (SystemClockImpl *)iface;
 260   SystemClockAdviseEntry* pEntry = NULL;
 261
 262   TRACE("(%p, 0x%s, 0x%s, %ld, %p)\n", This, wine_dbgstr_longlong(rtBaseTime),
 263       wine_dbgstr_longlong(rtStreamTime), hEvent, pdwAdviseCookie);
 264
 265   if ((HEVENT) 0 == hEvent) {
 266     return E_INVALIDARG;
 267   }
 268   if (0 >= rtBaseTime + rtStreamTime) {
 269     return E_INVALIDARG;
 270   }
 271   if (NULL == pdwAdviseCookie) {
 272     return E_POINTER;
 273   }
 274   pEntry = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SystemClockAdviseEntry));
 275   if (NULL == pEntry) {
 276     return E_OUTOFMEMORY;
 277   }
 278
 279   pEntry->hEvent = (HANDLE) hEvent;
 280   pEntry->rtBaseTime = rtBaseTime + rtStreamTime;
 281   pEntry->rtIntervalTime = 0;
 282
 283   EnterCriticalSection(&This->safe);
 284   QUARTZ_InsertAviseEntryFromQueue(This, pEntry, &This->pSingleShotAdvise);
 285   LeaveCriticalSection(&This->safe);
 286
 287   SystemClockPostMessageToAdviseThread(This, ADVISE_ADD_SINGLESHOT);
 288
 289   *pdwAdviseCookie = (DWORD_PTR) (pEntry);
 290   return S_OK;
 291 }
 292
 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;
 296
 297   TRACE("(%p, 0x%s, 0x%s, %ld, %p)\n", This, wine_dbgstr_longlong(rtStartTime),
 298       wine_dbgstr_longlong(rtPeriodTime), hSemaphore, pdwAdviseCookie);
 299
 300   if ((HSEMAPHORE) 0 == hSemaphore) {
 301     return E_INVALIDARG;
 302   }
 303   if (0 >= rtStartTime || 0 >= rtPeriodTime) {
 304     return E_INVALIDARG;
 305   }
 306   if (NULL == pdwAdviseCookie) {
 307     return E_POINTER;
 308   }
 309   pEntry = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SystemClockAdviseEntry));
 310   if (NULL == pEntry) {
 311     return E_OUTOFMEMORY;
 312   }
 313
 314   pEntry->hEvent = (HANDLE) hSemaphore;
 315   pEntry->rtBaseTime = rtStartTime;
 316   pEntry->rtIntervalTime = rtPeriodTime;
 317
 318   EnterCriticalSection(&This->safe);
 319   QUARTZ_InsertAviseEntryFromQueue(This, pEntry, &This->pPeriodicAdvise);
 320   LeaveCriticalSection(&This->safe);
 321
 322   SystemClockPostMessageToAdviseThread(This, ADVISE_ADD_PERIODIC);
 323
 324   *pdwAdviseCookie = (DWORD_PTR) (pEntry);
 325   return S_OK;
 326 }
 327
 328 static HRESULT WINAPI SystemClockImpl_Unadvise(IReferenceClock* iface, DWORD_PTR dwAdviseCookie) {
 329   SystemClockImpl *This = (SystemClockImpl *)iface;
 330   SystemClockAdviseEntry* pEntry = NULL;
 331   SystemClockAdviseEntry* it = NULL;
 332   HRESULT ret = S_OK;
 333   TRACE("(%p, %lu)\n", This, dwAdviseCookie);
 334
 335   pEntry = (SystemClockAdviseEntry*) dwAdviseCookie;
 336
 337   EnterCriticalSection(&This->safe);
 338   for (it = This->pPeriodicAdvise; NULL != it && it != pEntry; it = it->next) ;
 339   if (it != pEntry) {
 340     for (it = This->pSingleShotAdvise; NULL != it && it != pEntry; it = it->next) ;
 341     if (it != pEntry) {
 342       ret = S_FALSE;
 343       goto out;
 344     }
 345   }
 346
 347   QUARTZ_RemoveAviseEntryFromQueue(This, pEntry);
 348   HeapFree(GetProcessHeap(), 0, pEntry);
 349
 350   SystemClockPostMessageToAdviseThread(This, ADVISE_REMOVE);
 351
 352 out:
 353   LeaveCriticalSection(&This->safe);
 354   return ret;
 355 }
 356
 357 static const IReferenceClockVtbl SystemClock_Vtbl =
 358 {
 359     SystemClockImpl_QueryInterface,
 360     SystemClockImpl_AddRef,
 361     SystemClockImpl_Release,
 362     SystemClockImpl_GetTime,
 363     SystemClockImpl_AdviseTime,
 364     SystemClockImpl_AdvisePeriodic,
 365     SystemClockImpl_Unadvise
 366 };
 367
 368 HRESULT QUARTZ_CreateSystemClock(IUnknown * pUnkOuter, LPVOID * ppv) {
 369   SystemClockImpl* obj = NULL;
 370
 371   TRACE("(%p,%p)\n", ppv, pUnkOuter);
 372
 373   obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SystemClockImpl));
 374   if (NULL == obj)      {
 375     *ppv = NULL;
 376     return E_OUTOFMEMORY;
 377   }
 378   obj->lpVtbl = &SystemClock_Vtbl;
 379   obj->ref = 0;  /* will be inited by QueryInterface */
 380
 381   obj->lastTimeTickCount = GetTickCount();
 382   InitializeCriticalSection(&obj->safe);
 383
 384   return SystemClockImpl_QueryInterface((IReferenceClock*) obj, &IID_IReferenceClock, ppv);
 385 }