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Resolved thread deadlocks in socket ichannel code to support

Browse Source 
* glib/giowin32.c: Resolved thread deadlocks in socket
	ichannel code to support Add-Cancel-Add watch functionality
	on windows. Also cleaned up socket error handling to not
	segfault and do the right thing.
This commit is contained in:
Andy Lanoix 2003-06-07 20:31:28 +00:00
parent a495b2cb03
commit be76dd63f9
7 changed files with 237 additions and 75 deletions
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7
ChangeLog
View File

@ -1,3 +1,10 @@
Sat Jun 6 16:18:10 2003 Andrew Lanoix <alanoix@umich.edu>
* glib/giowin32.c: Resolved thread deadlocks in socket
ichannel code to support Add-Cancel-Add watch functionality
on windows. Also cleaned up socket error handling to not
segfault and do the right thing.
Fri Jun 6 10:24:23 2003 Hidetoshi Tajima <hidetoshi.tajima@sun.com>
* m4macros/glib-gettext.m4: Test for Solaris native gettext

7
ChangeLog.pre-2-10
View File

@ -1,3 +1,10 @@
Sat Jun 6 16:18:10 2003 Andrew Lanoix <alanoix@umich.edu>
* glib/giowin32.c: Resolved thread deadlocks in socket
ichannel code to support Add-Cancel-Add watch functionality
on windows. Also cleaned up socket error handling to not
segfault and do the right thing.
Fri Jun 6 10:24:23 2003 Hidetoshi Tajima <hidetoshi.tajima@sun.com>
* m4macros/glib-gettext.m4: Test for Solaris native gettext

7
ChangeLog.pre-2-12
View File

@ -1,3 +1,10 @@
Sat Jun 6 16:18:10 2003 Andrew Lanoix <alanoix@umich.edu>
* glib/giowin32.c: Resolved thread deadlocks in socket
ichannel code to support Add-Cancel-Add watch functionality
on windows. Also cleaned up socket error handling to not
segfault and do the right thing.
Fri Jun 6 10:24:23 2003 Hidetoshi Tajima <hidetoshi.tajima@sun.com>
* m4macros/glib-gettext.m4: Test for Solaris native gettext

7
ChangeLog.pre-2-4
View File

@ -1,3 +1,10 @@
Sat Jun 6 16:18:10 2003 Andrew Lanoix <alanoix@umich.edu>
* glib/giowin32.c: Resolved thread deadlocks in socket
ichannel code to support Add-Cancel-Add watch functionality
on windows. Also cleaned up socket error handling to not
segfault and do the right thing.
Fri Jun 6 10:24:23 2003 Hidetoshi Tajima <hidetoshi.tajima@sun.com>
* m4macros/glib-gettext.m4: Test for Solaris native gettext

7
ChangeLog.pre-2-6
View File

@ -1,3 +1,10 @@
Sat Jun 6 16:18:10 2003 Andrew Lanoix <alanoix@umich.edu>
* glib/giowin32.c: Resolved thread deadlocks in socket
ichannel code to support Add-Cancel-Add watch functionality
on windows. Also cleaned up socket error handling to not
segfault and do the right thing.
Fri Jun 6 10:24:23 2003 Hidetoshi Tajima <hidetoshi.tajima@sun.com>
* m4macros/glib-gettext.m4: Test for Solaris native gettext

7
ChangeLog.pre-2-8
View File

@ -1,3 +1,10 @@
Sat Jun 6 16:18:10 2003 Andrew Lanoix <alanoix@umich.edu>
* glib/giowin32.c: Resolved thread deadlocks in socket
ichannel code to support Add-Cancel-Add watch functionality
on windows. Also cleaned up socket error handling to not
segfault and do the right thing.
Fri Jun 6 10:24:23 2003 Hidetoshi Tajima <hidetoshi.tajima@sun.com>
* m4macros/glib-gettext.m4: Test for Solaris native gettext

270
glib/giowin32.c
View File

@ -4,7 +4,7 @@
* giowin32.c: IO Channels for Win32.
* Copyright 1998 Owen Taylor and Tor Lillqvist
* Copyright 1999-2000 Tor Lillqvist and Craig Setera
* Copyright 2001 Andrew Lanoix
* Copyright 2001-2003 Andrew Lanoix
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -110,6 +110,8 @@ struct _GIOWin32Channel {
/* Following fields used by socket channels */
GSList *watches;
HANDLE data_avail_noticed_event;
gint reset_send; /* socket used to send data so select_thread() can reset/re-loop */
gint reset_recv; /* socket used to recv data so select_thread() can reset/re-loop */
};
#define LOCK(mutex) EnterCriticalSection (&mutex)
@ -340,6 +342,71 @@ create_thread (GIOWin32Channel *channel,
WaitForSingleObject (channel->space_avail_event, INFINITE);
}
static void
init_reset_sockets(GIOWin32Channel *channel)
{
struct sockaddr_in local, local2, server;
unsigned int addr;
int len;
struct hostent *hp;
channel->reset_send = (gint) socket(AF_INET, SOCK_DGRAM, 0);
if (channel->reset_send == INVALID_SOCKET)
{
g_warning (G_STRLOC ": Error creating reset_send socket: %s\n",
g_win32_error_message (WSAGetLastError ()));
}
local.sin_family = AF_INET;
local.sin_port = 0;
local.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
if (bind(channel->reset_send, (struct sockaddr *)&local, sizeof(local)) == SOCKET_ERROR)
{
g_warning (G_STRLOC ": Error binding to reset_send socket: %s\n",
g_win32_error_message (WSAGetLastError ()));
}
local2.sin_family = AF_INET;
local2.sin_port = 0;
local2.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
channel->reset_recv = (gint) socket(AF_INET, SOCK_DGRAM, 0);
if (channel->reset_recv == INVALID_SOCKET)
{
g_warning (G_STRLOC ": Error creating reset_recv socket: %s\n",
g_win32_error_message (WSAGetLastError ()));
}
if (bind(channel->reset_recv, (struct sockaddr *)&local2, sizeof(local)) == SOCKET_ERROR)
{
g_warning (G_STRLOC ": Error binding to reset_recv socket: %s\n",
g_win32_error_message (WSAGetLastError ()));
}
len = sizeof(local2);
if (getsockname(channel->reset_recv, (struct sockaddr *)&local2, &len) == SOCKET_ERROR)
{
g_warning (G_STRLOC ": Error getsockname with reset_recv socket: %s\n",
g_win32_error_message (WSAGetLastError ()));
}
addr = inet_addr("127.0.0.1");
hp = gethostbyaddr((char *)&addr,4,AF_INET);
memset(&server,0,sizeof(server));
memcpy(&(server.sin_addr),hp->h_addr,hp->h_length);
server.sin_family = hp->h_addrtype;
server.sin_port = local2.sin_port;
if (connect(channel->reset_send, (struct sockaddr *)&server, sizeof(server)) == SOCKET_ERROR)
{
g_warning (G_STRLOC ": connect to reset_recv socket: %s\n",
g_win32_error_message (WSAGetLastError ()));
}
}
static GIOStatus
buffer_read (GIOWin32Channel *channel,
guchar *dest,
@ -417,6 +484,7 @@ select_thread (void *parameter)
fd_set read_fds, write_fds, except_fds;
GSList *tmp;
int n;
char buffer[8];
g_io_channel_ref ((GIOChannel *)channel);
@ -437,30 +505,42 @@ select_thread (void *parameter)
FD_ZERO (&read_fds);
FD_ZERO (&write_fds);
FD_ZERO (&except_fds);
FD_SET(channel->reset_recv, &read_fds);
LOCK (channel->mutex);
tmp = channel->watches;
while (tmp)
{
GIOWin32Watch *watch = (GIOWin32Watch *)tmp->data;
{
GIOWin32Watch *watch = (GIOWin32Watch *)tmp->data;
if (watch->condition & (G_IO_IN | G_IO_HUP))
FD_SET (channel->fd, &read_fds);
if (watch->condition & G_IO_OUT)
FD_SET (channel->fd, &write_fds);
if (watch->condition & G_IO_ERR)
FD_SET (channel->fd, &except_fds);
if (watch->condition & (G_IO_IN | G_IO_HUP))
FD_SET (channel->fd, &read_fds);
if (watch->condition & G_IO_OUT)
FD_SET (channel->fd, &write_fds);
if (watch->condition & G_IO_ERR)
FD_SET (channel->fd, &except_fds);
tmp = tmp->next;
}
tmp = tmp->next;
}
UNLOCK (channel->mutex);
if (channel->debug)
g_print ("select_thread %#x: calling select() for%s%s%s\n",
channel->thread_id,
(FD_ISSET (channel->fd, &read_fds) ? " IN" : ""),
(FD_ISSET (channel->fd, &write_fds) ? " OUT" : ""),
(FD_ISSET (channel->fd, &except_fds) ? " ERR" : ""));
g_print ("select_thread %#x: calling select() for%s%s%s\n",
channel->thread_id,
(FD_ISSET (channel->fd, &read_fds) ? " IN" : ""),
(FD_ISSET (channel->fd, &write_fds) ? " OUT" : ""),
(FD_ISSET (channel->fd, &except_fds) ? " ERR" : ""));
n = select (1, &read_fds, &write_fds, &except_fds, NULL);
LOCK (channel->mutex);
if (channel->needs_close)
{
UNLOCK (channel->mutex);
break;
}
UNLOCK (channel->mutex);
if (n == SOCKET_ERROR)
{
if (channel->debug)
@ -469,60 +549,62 @@ select_thread (void *parameter)
break;
}
if (channel->debug)
g_print ("select_thread %#x: got%s%s%s\n",
channel->thread_id,
(FD_ISSET (channel->fd, &read_fds) ? " IN" : ""),
(FD_ISSET (channel->fd, &write_fds) ? " OUT" : ""),
(FD_ISSET (channel->fd, &except_fds) ? " ERR" : ""));
if (FD_ISSET (channel->fd, &read_fds))
channel->revents |= G_IO_IN;
if (FD_ISSET (channel->fd, &write_fds))
channel->revents |= G_IO_OUT;
if (FD_ISSET (channel->fd, &except_fds))
channel->revents |= G_IO_ERR;
if (channel->debug)
g_print ("select_thread %#x: resetting data_avail_noticed, setting data_avail\n",
channel->thread_id);
ResetEvent (channel->data_avail_noticed_event);
SetEvent (channel->data_avail_event);
LOCK (channel->mutex);
if (channel->needs_close)
{
UNLOCK (channel->mutex);
break;
}
UNLOCK (channel->mutex);
if (channel->debug)
g_print ("select_thread %#x: waiting for data_avail_noticed\n",
channel->thread_id);
WaitForSingleObject (channel->data_avail_noticed_event, INFINITE);
if (channel->debug)
g_print ("select_thread %#x: got data_avail_noticed\n",
channel->thread_id);
}
channel->running = FALSE;
LOCK (channel->mutex);
if (channel->fd != -1)
if (FD_ISSET(channel->reset_recv, &read_fds))
{
/* DO NOT close the fd here */
channel->fd = -1;
if (channel->debug)
g_print ("select_thread %#x: re-looping\n",
channel->thread_id);
recv(channel->reset_recv, (char *)&buffer, (int) sizeof(buffer), 0);
continue;
}
if (channel->debug)
g_print ("select_thread %#x: got%s%s%s\n",
channel->thread_id,
(FD_ISSET (channel->fd, &read_fds) ? " IN" : ""),
(FD_ISSET (channel->fd, &write_fds) ? " OUT" : ""),
(FD_ISSET (channel->fd, &except_fds) ? " ERR" : ""));
if (FD_ISSET (channel->fd, &read_fds))
channel->revents |= G_IO_IN;
if (FD_ISSET (channel->fd, &write_fds))
channel->revents |= G_IO_OUT;
if (FD_ISSET (channel->fd, &except_fds))
channel->revents |= G_IO_ERR;
if (channel->debug)
g_print ("select_thread %#x: resetting data_avail_noticed, setting data_avail\n",
channel->thread_id);
LOCK (channel->mutex);
ResetEvent (channel->data_avail_noticed_event);
SetEvent (channel->data_avail_event);
if (channel->needs_close)
{
UNLOCK (channel->mutex);
break;
}
UNLOCK (channel->mutex);
if (channel->debug)
g_print ("select_thread %#x: waiting for data_avail_noticed\n",
channel->thread_id);
WaitForSingleObject (channel->data_avail_noticed_event, INFINITE);
if (channel->debug)
g_print ("select_thread %#x: got data_avail_noticed\n",
channel->thread_id);
}
LOCK (channel->mutex);
channel->running = FALSE;
if (channel->debug)
g_print ("select_thread %#x: got error, setting data_avail\n",
channel->thread_id);
SetEvent (channel->data_avail_event);
UNLOCK (channel->mutex);
g_io_channel_unref((GIOChannel *)channel);
UNLOCK (channel->mutex);
/* No need to call _endthreadex(), the actual thread starter routine
* in MSVCRT (see crt/src/threadex.c:_threadstartex) calls
* _endthreadex() for us.
@ -561,8 +643,8 @@ g_io_win32_prepare (GSource *source,
}
else if (channel->type == G_IO_WIN32_SOCKET)
{
LOCK (channel->mutex);
channel->revents = 0;
if (channel->debug)
g_print ("g_io_win32_prepare: for thread %#x, setting data_avail_noticed\n",
channel->thread_id);
@ -570,6 +652,7 @@ g_io_win32_prepare (GSource *source,
if (channel->debug)
g_print ("g_io_win32_prepare: thread %#x, there.\n",
channel->thread_id);
UNLOCK (channel->mutex);
}
return ((watch->condition & buffer_condition) == watch->condition);
@ -600,6 +683,7 @@ g_io_win32_check (GSource *source)
if (channel->type == G_IO_WIN32_SOCKET)
{
LOCK (channel->mutex);
if (channel->debug)
g_print ("g_io_win32_check: thread %#x, resetting data_avail\n",
channel->thread_id);
@ -607,6 +691,7 @@ g_io_win32_check (GSource *source)
if (channel->debug)
g_print ("g_io_win32_check: thread %#x, there.\n",
channel->thread_id);
UNLOCK (channel->mutex);
}
return ((watch->pollfd.revents | buffer_condition) & watch->condition);
@ -638,7 +723,9 @@ g_io_win32_finalize (GSource *source)
{
GIOWin32Watch *watch = (GIOWin32Watch *)source;
GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
char send_buffer[] = "f";
LOCK (channel->mutex);
if (channel->debug)
g_print ("g_io_win32_finalize: channel with thread %#x\n",
channel->thread_id);
@ -646,7 +733,11 @@ g_io_win32_finalize (GSource *source)
channel->watches = g_slist_remove (channel->watches, watch);
SetEvent (channel->data_avail_noticed_event);
if (channel->type == G_IO_WIN32_SOCKET)
send(channel->reset_send, send_buffer, sizeof(send_buffer), 0);
g_io_channel_unref (watch->channel);
UNLOCK (channel->mutex);
}
#if defined(G_PLATFORM_WIN32) && defined(__GNUC__)
@ -667,6 +758,7 @@ g_io_win32_create_watch (GIOChannel *channel,
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
GIOWin32Watch *watch;
GSource *source;
char send_buffer[] = "c";
source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
watch = (GIOWin32Watch *)source;
@ -685,14 +777,18 @@ g_io_win32_create_watch (GIOChannel *channel,
if (win32_channel->debug)
g_print ("g_io_win32_create_watch: fd:%d condition:%#x handle:%#x\n",
win32_channel->fd, condition, watch->pollfd.fd);
LOCK (win32_channel->mutex);
win32_channel->watches = g_slist_append (win32_channel->watches, watch);
if (win32_channel->thread_id == 0)
create_thread (win32_channel, condition, thread);
else
send(win32_channel->reset_send, send_buffer, sizeof(send_buffer), 0);
g_source_add_poll (source, &watch->pollfd);
UNLOCK (win32_channel->mutex);
return source;
}
@ -709,7 +805,7 @@ g_io_win32_msg_read (GIOChannel *channel,
if (count < sizeof (MSG))
{
g_set_error(err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_INVAL,
_("Incorrect message size")); /* Informative enough error message? */
"Incorrect message size"); /* Informative enough error message? */
return G_IO_STATUS_ERROR;
}
@ -738,7 +834,7 @@ g_io_win32_msg_write (GIOChannel *channel,
if (count != sizeof (MSG))
{
g_set_error(err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_INVAL,
_("Incorrect message size")); /* Informative enough error message? */
"Incorrect message size"); /* Informative enough error message? */
return G_IO_STATUS_ERROR;
}
@ -776,6 +872,10 @@ g_io_win32_free (GIOChannel *channel)
win32_channel->thread_id,
win32_channel->fd);
if (win32_channel->reset_send)
closesocket(win32_channel->reset_send);
if (win32_channel->reset_recv)
closesocket(win32_channel->reset_recv);
if (win32_channel->data_avail_event)
CloseHandle (win32_channel->data_avail_event);
if (win32_channel->space_avail_event)
@ -999,7 +1099,9 @@ g_io_win32_sock_read (GIOChannel *channel,
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
gint result;
GIOChannelError error;
GIOChannelError error = G_IO_STATUS_NORMAL;
GIOStatus internal_status = G_IO_STATUS_NORMAL;
char send_buffer[] = "sr";
if (win32_channel->debug)
g_print ("g_io_win32_sock_read: sockfd:%d count:%d\n",
@ -1031,16 +1133,27 @@ repeat:
error = G_IO_CHANNEL_ERROR_FAILED;
break;
}
g_set_error(err, G_IO_CHANNEL_ERROR, error, _("Socket error"));
return G_IO_STATUS_ERROR;
g_set_error(err, G_IO_CHANNEL_ERROR, error, "Socket read error");
internal_status = G_IO_STATUS_ERROR;
/* FIXME get all errors, better error messages */
}
else
{
*bytes_read = result;
return (result > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
if (result == 0)
internal_status = G_IO_STATUS_EOF;
}
if ((internal_status == G_IO_STATUS_EOF) ||
(internal_status == G_IO_STATUS_ERROR))
{
LOCK (win32_channel->mutex);
SetEvent(win32_channel->data_avail_noticed_event);
win32_channel->needs_close = 1;
send(win32_channel->reset_send, send_buffer, sizeof(send_buffer), 0);
UNLOCK (win32_channel->mutex);
}
return internal_status;
}
static GIOStatus
@ -1052,7 +1165,8 @@ g_io_win32_sock_write (GIOChannel *channel,
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
gint result;
GIOChannelError error;
GIOChannelError error = G_IO_STATUS_NORMAL;
char send_buffer[] = "sw";
if (win32_channel->debug)
g_print ("g_io_win32_sock_write: sockfd:%d count:%d\n",
@ -1084,8 +1198,13 @@ repeat:
error = G_IO_CHANNEL_ERROR_FAILED;
break;
}
g_set_error(err, G_IO_CHANNEL_ERROR, error, _("Socket error"));
return G_IO_STATUS_ERROR;
g_set_error(err, G_IO_CHANNEL_ERROR, error, "Socket write error");
LOCK (win32_channel->mutex);
SetEvent(win32_channel->data_avail_noticed_event);
win32_channel->needs_close = 1;
send(win32_channel->reset_send, send_buffer, sizeof(send_buffer), 0);
UNLOCK (win32_channel->mutex);
return G_IO_STATUS_ERROR;
/* FIXME get all errors, better error messages */
}
else
@ -1471,6 +1590,7 @@ g_io_channel_win32_new_socket (int socket)
g_io_channel_init (channel);
g_io_channel_win32_init (win32_channel);
init_reset_sockets(channel);
if (win32_channel->debug)
g_print ("g_io_channel_win32_new_socket: sockfd:%d\n", socket);
channel->funcs = &win32_channel_sock_funcs;