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Stylistic changes. Plug an unlikely memory leak that occurred in

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2008-08-27  Tor Lillqvist  <tml@novell.com>

	* glib/giowin32.c: Stylistic changes. Plug an unlikely memory leak
	that occurred in create_thread() if closing the thread handle
	failed. Add more error messages to g_io_win32_free() that are
	printed only when debugging. Plug handle leak, a socket channel's
	event was never closed.


svn path=/trunk/; revision=7405
This commit is contained in:
Tor Lillqvist 2008-08-27 16:49:17 +00:00 committed by Tor Lillqvist
parent 82c17ccf4f
commit 2c5de8ed26
2 changed files with 106 additions and 47 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2008-08-27 Tor Lillqvist <tml@novell.com>
* glib/giowin32.c: Stylistic changes. Plug an unlikely memory leak
that occurred in create_thread() if closing the thread handle
failed. Add more error messages to g_io_win32_free() that are
printed only when debugging. Plug handle leak, a socket channel's
event was never closed.
2008-08-27 Tor Lillqvist <tml@novell.com>
* config.h.win32.in: Should not define HAVE_DIRENT_H when

145
glib/giowin32.c
View File

@ -163,9 +163,6 @@ struct _GIOWin32Channel {
gboolean ever_writable;
};
#define LOCK(mutex) EnterCriticalSection (&mutex)
#define UNLOCK(mutex) LeaveCriticalSection (&mutex)
struct _GIOWin32Watch {
GSource source;
GPollFD pollfd;
@ -276,19 +273,21 @@ static void
g_io_channel_win32_init (GIOWin32Channel *channel)
{
channel->debug = g_io_win32_get_debug_flag ();
channel->buffer = NULL;
InitializeCriticalSection (&channel->mutex);
channel->running = FALSE;
channel->needs_close = FALSE;
channel->thread_id = 0;
channel->data_avail_event = NULL;
channel->revents = 0;
channel->buffer = NULL;
channel->space_avail_event = NULL;
channel->event_mask = 0;
channel->last_events = 0;
channel->event = NULL;
channel->write_would_have_blocked = FALSE;
channel->ever_writable = FALSE;
InitializeCriticalSection (&channel->mutex);
}
static void
@ -307,6 +306,7 @@ create_events (GIOWin32Channel *channel)
|| !(channel->space_avail_event = CreateEvent (&sec_attrs, FALSE, FALSE, NULL)))
{
gchar *emsg = g_win32_error_message (GetLastError ());
g_error ("Error creating event: %s", emsg);
g_free (emsg);
}
@ -335,7 +335,7 @@ read_thread (void *parameter)
SetEvent (channel->space_avail_event);
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
while (channel->running)
{
if (channel->debug)
@ -351,9 +351,9 @@ read_thread (void *parameter)
if (channel->debug)
g_print ("read_thread %#x: waiting for space\n",
channel->thread_id);
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
WaitForSingleObject (channel->space_avail_event, INFINITE);
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("read_thread %#x: rdp=%d, wrp=%d\n",
channel->thread_id, channel->rdp, channel->wrp);
@ -371,11 +371,11 @@ read_thread (void *parameter)
g_print ("read_thread %#x: calling read() for %d bytes\n",
channel->thread_id, nbytes);
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
nbytes = read (channel->fd, buffer, nbytes);
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
channel->revents = G_IO_IN;
if (nbytes == 0)
@ -411,7 +411,7 @@ read_thread (void *parameter)
g_print ("read_thread %#x: EOF, rdp=%d, wrp=%d, setting data_avail\n",
channel->thread_id, channel->rdp, channel->wrp);
SetEvent (channel->data_avail_event);
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
g_io_channel_unref ((GIOChannel *)channel);
@ -452,7 +452,7 @@ write_thread (void *parameter)
* write buffer.
*/
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
while (channel->running || channel->rdp != channel->wrp)
{
if (channel->debug)
@ -470,10 +470,10 @@ write_thread (void *parameter)
channel->thread_id);
channel->revents = G_IO_OUT;
SetEvent (channel->data_avail_event);
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
WaitForSingleObject (channel->space_avail_event, INFINITE);
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
if (channel->rdp == channel->wrp)
break;
@ -492,9 +492,9 @@ write_thread (void *parameter)
g_print ("write_thread %#x: calling write() for %d bytes\n",
channel->thread_id, nbytes);
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
nbytes = write (channel->fd, buffer, nbytes);
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("write_thread %#x: write(%i) returned %d, rdp=%d, wrp=%d\n",
@ -527,7 +527,7 @@ write_thread (void *parameter)
channel->fd = -1;
}
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
g_io_channel_unref ((GIOChannel *)channel);
@ -547,8 +547,12 @@ create_thread (GIOWin32Channel *channel,
g_warning ("Error creating thread: %s.",
g_strerror (errno));
else if (!CloseHandle (thread_handle))
g_warning ("Error closing thread handle: %s.\n",
g_win32_error_message (GetLastError ()));
{
gchar *emsg = g_win32_error_message (GetLastError ());
g_warning ("Error closing thread handle: %s.", emsg);
g_free (emsg);
}
WaitForSingleObject (channel->space_avail_event, INFINITE);
}
@ -563,25 +567,25 @@ buffer_read (GIOWin32Channel *channel,
guint nbytes;
guint left = count;
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("reading from thread %#x %" G_GSIZE_FORMAT " bytes, rdp=%d, wrp=%d\n",
channel->thread_id, count, channel->rdp, channel->wrp);
if (channel->wrp == channel->rdp)
{
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("waiting for data from thread %#x\n", channel->thread_id);
WaitForSingleObject (channel->data_avail_event, INFINITE);
if (channel->debug)
g_print ("done waiting for data from thread %#x\n", channel->thread_id);
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
if (channel->wrp == channel->rdp && !channel->running)
{
if (channel->debug)
g_print ("wrp==rdp, !running\n");
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
*bytes_read = 0;
return G_IO_STATUS_EOF;
}
@ -591,7 +595,7 @@ buffer_read (GIOWin32Channel *channel,
nbytes = channel->wrp - channel->rdp;
else
nbytes = BUFFER_SIZE - channel->rdp;
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
nbytes = MIN (left, nbytes);
if (channel->debug)
g_print ("moving %d bytes from thread %#x\n",
@ -599,7 +603,7 @@ buffer_read (GIOWin32Channel *channel,
memcpy (dest, channel->buffer + channel->rdp, nbytes);
dest += nbytes;
left -= nbytes;
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
channel->rdp = (channel->rdp + nbytes) % BUFFER_SIZE;
if (channel->debug)
g_print ("setting space_avail for thread %#x\n", channel->thread_id);
@ -614,7 +618,7 @@ buffer_read (GIOWin32Channel *channel,
channel->thread_id);
ResetEvent (channel->data_avail_event);
};
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
/* We have no way to indicate any errors form the actual
* read() or recv() call in the reader thread. Should we have?
@ -634,7 +638,7 @@ buffer_write (GIOWin32Channel *channel,
guint nbytes;
guint left = count;
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("buffer_write: writing to thread %#x %" G_GSIZE_FORMAT " bytes, rdp=%d, wrp=%d\n",
channel->thread_id, count, channel->rdp, channel->wrp);
@ -649,9 +653,9 @@ buffer_write (GIOWin32Channel *channel,
if (channel->debug)
g_print ("buffer_write: tid %#x: waiting for space\n",
channel->thread_id);
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
WaitForSingleObject (channel->data_avail_event, INFINITE);
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("buffer_write: tid %#x: rdp=%d, wrp=%d\n",
channel->thread_id, channel->rdp, channel->wrp);
@ -660,7 +664,7 @@ buffer_write (GIOWin32Channel *channel,
nbytes = MIN ((channel->rdp + BUFFER_SIZE - channel->wrp - 1) % BUFFER_SIZE,
BUFFER_SIZE - channel->wrp);
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
nbytes = MIN (left, nbytes);
if (channel->debug)
g_print ("buffer_write: tid %#x: writing %d bytes\n",
@ -668,7 +672,7 @@ buffer_write (GIOWin32Channel *channel,
memcpy (channel->buffer + channel->wrp, dest, nbytes);
dest += nbytes;
left -= nbytes;
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
channel->wrp = (channel->wrp + nbytes) % BUFFER_SIZE;
if (channel->debug)
@ -685,7 +689,7 @@ buffer_write (GIOWin32Channel *channel,
ResetEvent (channel->data_avail_event);
}
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
/* We have no way to indicate any errors form the actual
* write() call in the writer thread. Should we have?
@ -730,7 +734,7 @@ g_io_win32_prepare (GSource *source,
condition_to_string (watch->pollfd.revents),
condition_to_string (channel->revents));
LOCK (channel->mutex);
EnterCriticalSection (&channel->mutex);
if (channel->running)
{
if (channel->direction == 0 && channel->wrp == channel->rdp)
@ -750,7 +754,7 @@ g_io_win32_prepare (GSource *source,
channel->revents = 0;
}
}
UNLOCK (channel->mutex);
LeaveCriticalSection (&channel->mutex);
break;
case G_IO_WIN32_SOCKET:
@ -771,7 +775,13 @@ g_io_win32_prepare (GSource *source,
event_mask_to_string (event_mask));
if (WSAEventSelect (channel->fd, (HANDLE) watch->pollfd.fd,
event_mask) == SOCKET_ERROR)
; /* What? */
if (channel->debug)
{
gchar *emsg = g_win32_error_message (WSAGetLastError ());
g_print (" failed: %s", emsg);
g_free (emsg);
}
channel->event_mask = event_mask;
if (channel->debug)
@ -1068,8 +1078,10 @@ g_io_win32_msg_write (GIOChannel *channel,
if (!PostMessage (win32_channel->hwnd, msg.message, msg.wParam, msg.lParam))
{
gchar *emsg = g_win32_error_message (GetLastError ());
g_set_error_literal (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_FAILED, emsg);
g_free (emsg);
return G_IO_STATUS_ERROR;
}
@ -1095,15 +1107,54 @@ g_io_win32_free (GIOChannel *channel)
if (win32_channel->debug)
g_print ("g_io_win32_free channel=%p fd=%d\n", channel, win32_channel->fd);
if (win32_channel->data_avail_event)
CloseHandle (win32_channel->data_avail_event);
if (win32_channel->space_avail_event)
CloseHandle (win32_channel->space_avail_event);
if (win32_channel->type == G_IO_WIN32_SOCKET)
WSAEventSelect (win32_channel->fd, NULL, 0);
DeleteCriticalSection (&win32_channel->mutex);
if (win32_channel->data_avail_event)
if (!CloseHandle (win32_channel->data_avail_event))
if (win32_channel->debug)
{
gchar *emsg = g_win32_error_message (GetLastError ());
g_print (" CloseHandle(%p) failed: %s\n",
win32_channel->data_avail_event, emsg);
g_free (emsg);
}
g_free (win32_channel->buffer);
if (win32_channel->space_avail_event)
if (!CloseHandle (win32_channel->space_avail_event))
if (win32_channel->debug)
{
gchar *emsg = g_win32_error_message (GetLastError ());
g_print (" CloseHandle(%p) failed: %s\n",
win32_channel->space_avail_event, emsg);
g_free (emsg);
}
if (win32_channel->type == G_IO_WIN32_SOCKET)
if (WSAEventSelect (win32_channel->fd, NULL, 0) == SOCKET_ERROR)
if (win32_channel->debug)
{
gchar *emsg = g_win32_error_message (WSAGetLastError ());
g_print (" WSAEventSelect(%d,NULL,{}) failed: %s\n",
win32_channel->fd, emsg);
g_free (emsg);
}
if (win32_channel->event)
if (!WSACloseEvent (win32_channel->event))
if (win32_channel->debug)
{
gchar *emsg = g_win32_error_message (WSAGetLastError ());
g_print (" WSACloseEvent(%p) failed: %s\n",
win32_channel->event, emsg);
g_free (emsg);
}
g_free (win32_channel);
}
@ -1280,7 +1331,7 @@ g_io_win32_fd_close (GIOChannel *channel,
g_print ("g_io_win32_fd_close: thread=%#x: fd=%d\n",
win32_channel->thread_id,
win32_channel->fd);
LOCK (win32_channel->mutex);
EnterCriticalSection (&win32_channel->mutex);
if (win32_channel->running)
{
if (win32_channel->debug)
@ -1303,7 +1354,7 @@ g_io_win32_fd_close (GIOChannel *channel,
win32_channel->fd);
win32_channel->fd = -1;
}
UNLOCK (win32_channel->mutex);
LeaveCriticalSection (&win32_channel->mutex);
/* FIXME error detection? */
@ -1334,7 +1385,7 @@ g_io_win32_fd_create_watch (GIOChannel *channel,
channel, win32_channel->fd,
condition_to_string (condition), (HANDLE) watch->pollfd.fd);
LOCK (win32_channel->mutex);
EnterCriticalSection (&win32_channel->mutex);
if (win32_channel->thread_id == 0)
{
if (condition & G_IO_IN)
@ -1344,7 +1395,7 @@ g_io_win32_fd_create_watch (GIOChannel *channel,
}
g_source_add_poll (source, &watch->pollfd);
UNLOCK (win32_channel->mutex);
LeaveCriticalSection (&win32_channel->mutex);
return source;
}
@ -1591,7 +1642,7 @@ g_io_channel_new_file (const gchar *filename,
mode_num = MODE_A;
break;
default:
g_warning ("Invalid GIOFileMode %s.\n", mode);
g_warning ("Invalid GIOFileMode %s.", mode);
return NULL;
}
@ -1607,7 +1658,7 @@ g_io_channel_new_file (const gchar *filename,
}
/* Fall through */
default:
g_warning ("Invalid GIOFileMode %s.\n", mode);
g_warning ("Invalid GIOFileMode %s.", mode);
return NULL;
}