+ return 0;
+}
+
+static unsigned __stdcall
+write_thread (void *parameter)
+{
+ GIOWin32Channel *channel = parameter;
+ guchar *buffer;
+ gint nbytes;
+
+ g_io_channel_ref ((GIOChannel *)channel);
+
+ if (channel->debug)
+ g_print ("write_thread %#x: start fd=%d, data_avail=%p space_avail=%p\n",
+ channel->thread_id,
+ channel->fd,
+ channel->data_avail_event,
+ channel->space_avail_event);
+
+ channel->direction = 1;
+ channel->buffer = g_malloc (BUFFER_SIZE);
+ channel->rdp = channel->wrp = 0;
+ channel->running = TRUE;
+
+ SetEvent (channel->space_avail_event);
+
+ /* We use the same event objects as for a reader thread, but with
+ * reversed meaning. So, space_avail is used if data is available
+ * for writing, and data_avail is used if space is available in the
+ * write buffer.
+ */
+
+ EnterCriticalSection (&channel->mutex);
+ while (channel->running || channel->rdp != channel->wrp)
+ {
+ if (channel->debug)
+ g_print ("write_thread %#x: rdp=%d, wrp=%d\n",
+ channel->thread_id, channel->rdp, channel->wrp);
+ if (channel->wrp == channel->rdp)
+ {
+ /* Buffer is empty. */
+ if (channel->debug)
+ g_print ("write_thread %#x: resetting space_avail\n",
+ channel->thread_id);
+ ResetEvent (channel->space_avail_event);
+ if (channel->debug)
+ g_print ("write_thread %#x: waiting for data\n",
+ channel->thread_id);
+ channel->revents = G_IO_OUT;
+ SetEvent (channel->data_avail_event);
+ LeaveCriticalSection (&channel->mutex);
+ WaitForSingleObject (channel->space_avail_event, INFINITE);
+
+ EnterCriticalSection (&channel->mutex);
+ if (channel->rdp == channel->wrp)
+ break;
+
+ if (channel->debug)
+ g_print ("write_thread %#x: rdp=%d, wrp=%d\n",
+ channel->thread_id, channel->rdp, channel->wrp);
+ }
+
+ buffer = channel->buffer + channel->rdp;
+ if (channel->rdp < channel->wrp)
+ nbytes = channel->wrp - channel->rdp;
+ else
+ nbytes = BUFFER_SIZE - channel->rdp;
+
+ if (channel->debug)
+ g_print ("write_thread %#x: calling write() for %d bytes\n",
+ channel->thread_id, nbytes);
+
+ LeaveCriticalSection (&channel->mutex);
+ nbytes = write (channel->fd, buffer, nbytes);
+ EnterCriticalSection (&channel->mutex);
+
+ if (channel->debug)
+ g_print ("write_thread %#x: write(%i) returned %d, rdp=%d, wrp=%d\n",
+ channel->thread_id, channel->fd, nbytes, channel->rdp, channel->wrp);
+
+ channel->revents = 0;
+ if (nbytes > 0)
+ channel->revents |= G_IO_OUT;
+ else if (nbytes <= 0)
+ channel->revents |= G_IO_ERR;
+
+ channel->rdp = (channel->rdp + nbytes) % BUFFER_SIZE;