void MtSync_GetNextBlock(CMtSync *p)
{
  if (p->needStart)
  {
    p->numProcessedBlocks = 1;
    p->needStart = False;
    p->stopWriting = False;
    p->exit = False;
    Event_Reset(&p->wasStarted);
    Event_Reset(&p->wasStopped);

    Event_Set(&p->canStart);
    Event_Wait(&p->wasStarted);
  }
  else
  {
    CriticalSection_Leave(&p->cs);
    p->csWasEntered = False;
    p->numProcessedBlocks++;
    Semaphore_Release1(&p->freeSemaphore);
  }
  Semaphore_Wait(&p->filledSemaphore);
  CriticalSection_Enter(&p->cs);
  p->csWasEntered = True;
}
Beispiel #2
0
void BtThreadFunc(CMatchFinderMt *mt)
{
  CMtSync *p = &mt->btSync;
  for (;;)
  {
    UInt32 blockIndex = 0;
    Event_Wait(&p->canStart);
    Event_Set(&p->wasStarted);
    for (;;)
    {
      if (p->exit)
        return;
      if (p->stopWriting)
      {
        p->numProcessedBlocks = blockIndex;
        MtSync_StopWriting(&mt->hashSync);
        Event_Set(&p->wasStopped);
        break;
      }
      Semaphore_Wait(&p->freeSemaphore);
      BtFillBlock(mt, blockIndex++);
      Semaphore_Release1(&p->filledSemaphore);
    }
  }
}
Beispiel #3
0
void MtSync_StopWriting(CMtSync *p)
{
  UInt32 myNumBlocks = p->numProcessedBlocks;
  if (!Thread_WasCreated(&p->thread) || p->needStart)
    return;
  EnterGlobalLock();
  TraceObjectSync("MtSync_StopWriting:stop", p);
  p->stopWriting = True;
  TraceObjectSync("MtSync_StopWriting:stop", p);
  LeaveGlobalLock();
  if (p->csWasEntered)
  {
    CriticalSection_Leave(&p->cs);
    p->csWasEntered = False;
  }
  Semaphore_Release1(&p->freeSemaphore);
 
  Event_Wait(&p->wasStopped);

  while (myNumBlocks++ != p->numProcessedBlocks)
  {
    Semaphore_Wait(&p->filledSemaphore);
    Semaphore_Release1(&p->freeSemaphore);
  }
  p->needStart = True;
}
Beispiel #4
0
void HashThreadFunc(CMatchFinderMt *mt)
{
  CMtSync *p = &mt->hashSync;
  for (;;)
  {
    UInt32 numProcessedBlocks = 0;
    Event_Wait(&p->canStart);
    Event_Set(&p->wasStarted);
    for (;;)
    {
      if (p->exit)
        return;
      if (p->stopWriting)
      {
        p->numProcessedBlocks = numProcessedBlocks;
        Event_Set(&p->wasStopped);
        break;
      }

      {
        CMatchFinder *mf = mt->MatchFinder;
        if (MatchFinder_NeedMove(mf))
        {
          CriticalSection_Enter(&mt->btSync.cs);
          CriticalSection_Enter(&mt->hashSync.cs);
          {
            const Byte *beforePtr = MatchFinder_GetPointerToCurrentPos(mf);
            const Byte *afterPtr;
            MatchFinder_MoveBlock(mf);
            afterPtr = MatchFinder_GetPointerToCurrentPos(mf);
            mt->pointerToCurPos -= beforePtr - afterPtr;
            mt->buffer -= beforePtr - afterPtr;
          }
          CriticalSection_Leave(&mt->btSync.cs);
          CriticalSection_Leave(&mt->hashSync.cs);
          continue;
        }

        Semaphore_Wait(&p->freeSemaphore);

        MatchFinder_ReadIfRequired(mf);
        if (mf->pos > (kMtMaxValForNormalize - kMtHashBlockSize))
        {
          UInt32 subValue = (mf->pos - mf->historySize - 1);
          MatchFinder_ReduceOffsets(mf, subValue);
          MatchFinder_Normalize3(subValue, mf->hash + mf->fixedHashSize, mf->hashMask + 1);
        }
        {
          UInt32 *heads = mt->hashBuf + ((numProcessedBlocks++) & kMtHashNumBlocksMask) * kMtHashBlockSize;
          UInt32 num = mf->streamPos - mf->pos;
          heads[0] = 2;
          heads[1] = num;
          if (num >= mf->numHashBytes)
          {
            num = num - mf->numHashBytes + 1;
            if (num > kMtHashBlockSize - 2)
              num = kMtHashBlockSize - 2;
            mt->GetHeadsFunc(mf->buffer, mf->pos, mf->hash + mf->fixedHashSize, mf->hashMask, heads + 2, num);
            heads[0] += num;
          }
          mf->pos += num;
          mf->buffer += num;
        }
      }

      Semaphore_Release1(&p->filledSemaphore);
    }
  }
}