C++ (Cpp) Iterator Examples

Example #1

File: fifo.cpp Project: mylegacy/haiku

void
Inode::NotifyEndClosed(bool writer)
{
	TRACE("Inode %p::%s(%s)\n", this, __FUNCTION__,
		writer ? "writer" : "reader");

	if (writer) {
		// Our last writer has been closed; if the pipe
		// contains no data, unlock all waiting readers
		TRACE("  buffer readable: %zu\n", fBuffer.Readable());
		if (fBuffer.Readable() == 0) {
			ReadRequestList::Iterator iterator = fReadRequests.GetIterator();
			while (ReadRequest* request = iterator.Next())
				request->Notify();

			if (fReadSelectSyncPool)
				notify_select_event_pool(fReadSelectSyncPool, B_SELECT_READ);
		}
	} else {
		// Last reader is gone. Wake up all writers.
		fWriteCondition.NotifyAll();

		if (fWriteSelectSyncPool) {
			notify_select_event_pool(fWriteSelectSyncPool, B_SELECT_WRITE);
			notify_select_event_pool(fWriteSelectSyncPool, B_SELECT_ERROR);
		}
	}
}

Example #2

File: fifo.cpp Project: mmadia/Haiku-services-branch

void
Inode::Close(int openMode, file_cookie* cookie)
{
	TRACE("Inode %p::Close(openMode = %d)\n", this, openMode);

	MutexLocker locker(RequestLock());

	// Notify all currently reading file descriptors
	ReadRequestList::Iterator iterator = fReadRequests.GetIterator();
	while (ReadRequest* request = iterator.Next()) {
		if (request->Cookie() == cookie)
			request->Notify(B_FILE_ERROR);
	}

	if ((openMode & O_ACCMODE) == O_WRONLY && --fWriterCount == 0)
		NotifyEndClosed(true);

	if ((openMode & O_ACCMODE) == O_RDONLY
		|| (openMode & O_ACCMODE) == O_RDWR) {
		if (--fReaderCount == 0)
			NotifyEndClosed(false);
	}

	if (fWriterCount == 0) {
		// Notify any still reading writers to stop
		// TODO: This only works reliable if there is only one writer - we could
		// do the same thing done for the read requests.
		fWriteCondition.NotifyAll(B_FILE_ERROR);
	}

	if (fReaderCount == 0 && fWriterCount == 0) {
		fActive = false;
		fBuffer.DeleteBuffer();
	}
}