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);
}
}
}
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();
}
}