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|
/*
This file is part of GNUnet.
(C) 2010, 2011 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file src/lib/eventloop.c
* @brief code for merging GNUnet scheduler and Gtk Main Loop event loops
* @author Christian Grothoff
*/
#include "gnunet_gtk.h"
#define DEBUG_EVENTLOOP GNUNET_NO
/**
* Initial size of our poll array cache.
*
* TODO: get some statistics, find the maximum number of fds ever
* polled during normal gnunet-gtk operation, and set this to that number.
*/
#define INITIAL_POLL_ARRAY_SIZE 30
/**
* Main context for our event loop.
*/
struct GNUNET_GTK_MainLoop
{
/**
* Our configuration.
*/
const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* Name of the glade file for the main window
*/
const char *main_window_file;
/**
* Initial task to run to setup the system.
*/
GNUNET_SCHEDULER_Task main_task;
/**
* Builder for the main window.
*/
GtkBuilder *builder;
/**
* Gib's Main loop.
*/
GMainLoop *gml;
/**
* GTK's main context.
*/
GMainContext *gmc;
/**
* Read set.
*/
struct GNUNET_NETWORK_FDSet *rs;
/**
* Write set.
*/
struct GNUNET_NETWORK_FDSet *ws;
/**
* Recycled array of polling descriptors.
*/
GPollFD *cached_poll_array;
/**
* Name of the configuration file.
*/
char *cfgfile;
/**
* Size of the 'cached_poll_array'.
*/
guint cached_poll_array_size;
/**
* Task we keep around just to keep the event loop running.
*/
GNUNET_SCHEDULER_TaskIdentifier dummy_task;
#if WINDOWS
/**
* Array to hold pipe handles during a select() call
*/
struct GNUNET_DISK_FileHandle **read_array;
/**
* Allocated length of read_array
*/
int read_array_length;
/**
* Event to fire when a socket is ready for reading
*/
HANDLE hEventRead;
/**
* Event to fire when a socket is ready for writing
*/
HANDLE hEventWrite;
/**
* Event to fire when a socket had an error
*/
HANDLE hEventException;
/**
* Event that is permanently enabled and is used to signal a pipe
* that is ready for writing (asynchronous pipes are always writable)
*/
HANDLE hEventPipeWrite;
/**
* Event that is permanently enabled and is used to signal a pipe
* that is ready for reading (used to wake up early on a pipe that
* is known to be readable)
*/
HANDLE hEventReadReady;
/**
* A list to hold file handles that are ready for reading
*/
struct GNUNET_CONTAINER_SList *handles_read;
/**
* A list to hold file handles that are ready for writing
*/
struct GNUNET_CONTAINER_SList *handles_write;
/**
* A list to hold file handles that are broken
*/
struct GNUNET_CONTAINER_SList *handles_except;
#endif
};
/**
* Get the configuration.
*
* @param ml handle to the main loop
* @return handle to the configuration, never NULL
*/
const struct GNUNET_CONFIGURATION_Handle *
GNUNET_GTK_main_loop_get_configuration (struct GNUNET_GTK_MainLoop *ml)
{
return ml->cfg;
}
/**
* Trigger shutdown of the GUI and exit the main loop.
*
* @param ml handle to the main loop
*/
void
GNUNET_GTK_main_loop_quit (struct GNUNET_GTK_MainLoop *ml)
{
g_main_loop_quit (ml->gml);
ml->gml = NULL;
if (GNUNET_SCHEDULER_NO_TASK != ml->dummy_task)
{
GNUNET_SCHEDULER_cancel (ml->dummy_task);
ml->dummy_task = GNUNET_SCHEDULER_NO_TASK;
}
}
/**
* Get the builder from the main window.
*
* @param ml handle to the main loop
* @return NULL on error, otherwise the builder
*/
GtkBuilder *
GNUNET_GTK_main_loop_get_builder (struct GNUNET_GTK_MainLoop *ml)
{
return ml->builder;
}
int
GNUNET_GTK_main_loop_build_window (struct GNUNET_GTK_MainLoop *ml, gpointer data)
{
ml->builder = GNUNET_GTK_get_new_builder (ml->main_window_file, data);
if (ml->builder == NULL)
{
GNUNET_GTK_main_loop_quit (ml);
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Obtain the name of the configuration file that is being used.
*
* @param ml handle to the main loop
* @return name of configuration file
*/
const char *
GNUNET_GTK_main_loop_get_configuration_file (struct GNUNET_GTK_MainLoop *ml)
{
return ml->cfgfile;
}
/**
* Get an object from the main window.
*
* @param ml handle to the main loop
* @param name name of the object
* @return NULL on error, otherwise the object
*/
GObject *
GNUNET_GTK_main_loop_get_object (struct GNUNET_GTK_MainLoop * ml,
const char *name)
{
return gtk_builder_get_object (ml->builder, name);
}
/**
* Task to run Gtk events (within a GNUnet scheduler task).
*
* @param cls the main loop handle
* @param tc scheduler context
*/
static void
dispatch_gtk_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_GTK_MainLoop *ml = cls;
g_main_context_dispatch (ml->gmc);
}
/**
* Change the size of the cached poll array to the given value.
*
* @param ml main loop context with the cached poll array
* @param new_size desired size of the cached poll array
*/
static void
resize_cached_poll_array (struct GNUNET_GTK_MainLoop *ml, guint new_size)
{
if (NULL == ml->cached_poll_array)
ml->cached_poll_array = g_new (GPollFD, new_size);
else
ml->cached_poll_array = g_renew (GPollFD, ml->cached_poll_array, new_size);
ml->cached_poll_array_size = new_size;
}
/**
* Dummy task to keep our scheduler running.
*/
static void
keepalive_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_GTK_MainLoop *ml = cls;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Dummy task was scheduled\n");
ml->dummy_task =
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
&keepalive_task, ml);
}
#ifndef FD_COPY
#define FD_COPY(s, d) (memcpy ((d), (s), sizeof (fd_set)))
#endif
/**
* Replacement for the GNUnet scheduler's "select" that integrates the
* Gtk event loop. We merge Gtk's events with those from GNUnet's
* scheduler and then use 'g_poll' on both. Then we process the Gtk
* events (by adding a task to do so to the GNUnet scheduler), and, if
* applicable, return the GNUnet-scheduler events back to GNUnet.
*
* @param cls the 'struct GNUNET_GTK_MainLoop'
* @param rfds set of sockets to be checked for readability
* @param wfds set of sockets to be checked for writability
* @param efds set of sockets to be checked for exceptions
* @param timeout relative value when to return
* @return number of selected sockets, GNUNET_SYSERR on error
*/
static int
gnunet_gtk_select (void *cls, struct GNUNET_NETWORK_FDSet *rfds,
struct GNUNET_NETWORK_FDSet *wfds,
struct GNUNET_NETWORK_FDSet *efds,
const struct GNUNET_TIME_Relative timeout)
{
struct GNUNET_GTK_MainLoop *ml = cls;
int max_nfds;
gint poll_result;
gint delay = INT_MAX;
int i;
guint ui;
guint fd_counter;
guint need_gfds = 0;
fd_set aread;
fd_set awrite;
fd_set aexcept;
int result = 0;
gint max_priority;
#if WINDOWS
int pre_ret = 0;
int sock_read = 0;
int sock_write = 0;
int sock_err = 0;
int socks;
int always_ready_write_fd = -1;
int select_ret = 0;
int read_handles = 0;
DWORD waitstatus;
#endif
if (ml->gml == NULL || TRUE != g_main_loop_is_running (ml->gml))
return GNUNET_NETWORK_socket_select (rfds, wfds, efds, timeout);
if (NULL != rfds)
FD_COPY (&rfds->sds, &aread);
else
FD_ZERO (&aread);
if (NULL != wfds)
FD_COPY (&wfds->sds, &awrite);
else
FD_ZERO (&awrite);
if (NULL != efds)
FD_COPY (&efds->sds, &aexcept);
else
FD_ZERO (&aexcept);
#if WINDOWS
ResetEvent (ml->hEventRead);
ResetEvent (ml->hEventWrite);
ResetEvent (ml->hEventException);
GNUNET_CONTAINER_slist_clear (ml->handles_read);
GNUNET_CONTAINER_slist_clear (ml->handles_write);
GNUNET_CONTAINER_slist_clear (ml->handles_except);
#endif
max_nfds = -1;
if (rfds != NULL)
max_nfds = GNUNET_MAX (max_nfds, rfds->nsds);
if (wfds != NULL)
max_nfds = GNUNET_MAX (max_nfds, wfds->nsds);
if (efds != NULL)
max_nfds = GNUNET_MAX (max_nfds, efds->nsds);
if (ml->cached_poll_array_size == 0)
resize_cached_poll_array (ml, INITIAL_POLL_ARRAY_SIZE);
#if !WINDOWS
fd_counter = 0;
for (i = 0; i < max_nfds; i++)
{
int isset[3];
isset[0] = (rfds == NULL) ? 0 : FD_ISSET (i, &rfds->sds);
isset[1] = (wfds == NULL) ? 0 : FD_ISSET (i, &wfds->sds);
isset[2] = (efds == NULL) ? 0 : FD_ISSET (i, &efds->sds);
if ((!isset[0]) && (!isset[1]) && (!isset[2]))
continue;
if (fd_counter >= ml->cached_poll_array_size)
resize_cached_poll_array (ml, ml->cached_poll_array_size * 2);
ml->cached_poll_array[fd_counter].fd = i;
ml->cached_poll_array[fd_counter].events =
(isset[0] ? G_IO_IN | G_IO_HUP | G_IO_ERR : 0) | (isset[1] ? G_IO_OUT |
G_IO_ERR : 0) |
(isset[2] ? G_IO_ERR : 0);
fd_counter++;
}
#else
{
struct GNUNET_CONTAINER_SList_Iterator t;
fd_counter = 0;
/* We might overshoot a little, but that won't hurt very much */
int need_nfds =
(rfds->sds.fd_count + rfds->sds.fd_count + rfds->sds.fd_count >
0 ? 3 : 0) + (rfds ==
NULL ? 0 : GNUNET_CONTAINER_slist_count (rfds->
handles)) +
(wfds == NULL ? 0 : 1) + 1;
if (need_nfds >= ml->cached_poll_array_size)
resize_cached_poll_array (ml, need_nfds * 2);
/* Since there are also gmainloop's own fds, just need_nfds won't be
* enough, so make it twice as long.
*/
if (ml->read_array_length < GNUNET_CONTAINER_slist_count (rfds->handles))
{
ml->read_array =
GNUNET_realloc (ml->read_array,
GNUNET_CONTAINER_slist_count (rfds->handles) *
sizeof (struct GNUNET_DISK_FileHandle *));
ml->read_array_length = GNUNET_CONTAINER_slist_count (rfds->handles);
}
if (rfds != NULL)
{
for (t = GNUNET_CONTAINER_slist_begin (rfds->handles), i = 0;
GNUNET_CONTAINER_slist_end (&t) != GNUNET_YES;
GNUNET_CONTAINER_slist_next (&t), i += 1)
{
struct GNUNET_DISK_FileHandle *fh =
GNUNET_CONTAINER_slist_get (&t, NULL);
if (fh->type == GNUNET_PIPE)
{
if (!ReadFile (fh->h, NULL, 0, NULL, fh->oOverlapRead))
{
DWORD error_code = GetLastError ();
if (error_code == ERROR_IO_PENDING)
{
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Adding the pipe's 0x%x overlapped event to the array as %d\n",
fh->h, nhandles);
#endif
ml->cached_poll_array[fd_counter].fd =
(intptr_t) fh->oOverlapRead->hEvent;
/* On W32 .events makes no sense - g_poll will just OR its
* contents into .revents when the .fd event fires.
* So we'll use it in the way that suits us the best.
*/
ml->cached_poll_array[fd_counter].events = G_IO_IN;
fd_counter += 1;
ml->read_array[read_handles] = fh;
read_handles += 1;
}
else
{
ml->cached_poll_array[fd_counter].fd =
(intptr_t) ml->hEventReadReady;
ml->cached_poll_array[fd_counter].events = G_IO_HUP;
fd_counter += 1;
ml->read_array[read_handles] = fh;
read_handles += 1;
}
}
else
{
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Adding the read ready event to the array as %d\n",
nhandles);
#endif
ml->cached_poll_array[fd_counter].fd =
(intptr_t) ml->hEventReadReady;
ml->cached_poll_array[fd_counter].events = G_IO_IN;
fd_counter += 1;
ml->read_array[read_handles] = fh;
read_handles += 1;
}
}
else
{
GNUNET_CONTAINER_slist_add (ml->handles_read,
GNUNET_CONTAINER_SLIST_DISPOSITION_TRANSIENT,
fh,
sizeof (struct GNUNET_DISK_FileHandle));
pre_ret++;
}
}
}
if ((wfds != NULL) && (GNUNET_CONTAINER_slist_count (wfds->handles) > 0))
{
ml->cached_poll_array[fd_counter].fd = (intptr_t) ml->hEventPipeWrite;
ml->cached_poll_array[fd_counter].events = G_IO_OUT;
always_ready_write_fd = fd_counter;
fd_counter += 1;
}
if (efds != NULL)
{
for (t = GNUNET_CONTAINER_slist_begin (efds->handles), i = 0;
GNUNET_CONTAINER_slist_end (&t) != GNUNET_YES;
GNUNET_CONTAINER_slist_next (&t), i += 1)
{
struct GNUNET_DISK_FileHandle *fh =
GNUNET_CONTAINER_slist_get (&t, NULL);
DWORD dwBytes;
if (fh->type == GNUNET_PIPE)
{
if (!PeekNamedPipe (fh->h, NULL, 0, NULL, &dwBytes, NULL))
{
GNUNET_CONTAINER_slist_add (ml->handles_except,
GNUNET_CONTAINER_SLIST_DISPOSITION_TRANSIENT,
fh,
sizeof (struct GNUNET_DISK_FileHandle));
pre_ret++;
}
}
}
}
if ((rfds != NULL) && (rfds->sds.fd_count > 0))
{
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Adding the socket read event to the array as %d\n",
fd_counter);
#endif
ml->cached_poll_array[fd_counter].fd = (intptr_t) ml->hEventRead;
ml->cached_poll_array[fd_counter].events = G_IO_IN;
for (i = 0; i < rfds->sds.fd_count; i++)
WSAEventSelect (rfds->sds.fd_array[i], ml->hEventRead,
FD_ACCEPT | FD_READ | FD_CLOSE);
fd_counter += 1;
sock_read = rfds->sds.fd_count;
}
if ((wfds != NULL) && (wfds->sds.fd_count > 0))
{
int wakeup = 0;
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Adding the socket write event to the array as %d\n",
fd_counter);
#endif
ml->cached_poll_array[fd_counter].fd = (intptr_t) ml->hEventWrite;
ml->cached_poll_array[fd_counter].events = G_IO_OUT;
for (ui = 0; ui < wfds->sds.fd_count; ui++)
{
DWORD error;
int status;
status = send (wfds->sds.fd_array[ui], NULL, 0, 0);
error = GetLastError ();
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"pre-send to the socket %u returned %d (%u)\n", ui, status,
error);
#endif
if (status == 0 || (error != WSAEWOULDBLOCK && error != WSAENOTCONN))
wakeup = 1;
WSAEventSelect (wfds->sds.fd_array[ui], ml->hEventWrite,
FD_WRITE | FD_CONNECT | FD_CLOSE);
}
if (wakeup)
SetEvent (ml->hEventWrite);
fd_counter += 1;
sock_write = wfds->sds.fd_count;
}
if ((efds != NULL) && (efds->sds.fd_count > 0))
{
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Adding the socket error event to the array as %d\n",
fd_counter);
#endif
ml->cached_poll_array[fd_counter].fd = (intptr_t) ml->hEventException;
ml->cached_poll_array[fd_counter].events = G_IO_ERR;
for (ui = 0; ui < efds->sds.fd_count; ui++)
WSAEventSelect (efds->sds.fd_array[ui], ml->hEventException,
FD_OOB | FD_CLOSE);
fd_counter++;
sock_err = efds->sds.fd_count;
}
}
socks = sock_read + sock_write + sock_err;
#endif
/* combine with Gtk events */
if (NULL != ml->gmc)
{
g_main_context_prepare (ml->gmc, &max_priority);
while (1)
{
need_gfds =
g_main_context_query (ml->gmc, max_priority, &delay,
&ml->cached_poll_array[fd_counter],
ml->cached_poll_array_size - fd_counter);
if (ml->cached_poll_array_size >= need_gfds + fd_counter)
break;
resize_cached_poll_array (ml, fd_counter + need_gfds);
}
}
if (timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
{
if (delay >= 0)
delay =
GNUNET_MIN (timeout.rel_value /
GNUNET_TIME_UNIT_MILLISECONDS.rel_value, delay);
else
delay = timeout.rel_value / GNUNET_TIME_UNIT_MILLISECONDS.rel_value;
}
#if WINDOWS
if (pre_ret > 0)
{
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "pre_ret is %d, setting delay to 0\n",
pre_ret);
#endif
delay = 0;
}
#endif
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"We have %d of our FDs and %d of GMC ones, going to wait %6dms\n",
fd_counter, need_gfds, delay);
#endif
poll_result = g_poll (ml->cached_poll_array, fd_counter + need_gfds, delay);
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "g_poll returned : %d\n", poll_result);
#endif
if (-1 == poll_result)
return GNUNET_SYSERR;
/* Take care of GUI events.
* Dispatching the events here will eventually crash the scheduler, must do this
* from within a task (currently we're not in a task, but in a select() call, remember)
* Startup reason is used to pass the scheduler sanity check.
*/
if (NULL != ml->gmc)
{
if (TRUE ==
g_main_context_check (ml->gmc, max_priority,
&ml->cached_poll_array[fd_counter], need_gfds))
GNUNET_SCHEDULER_add_continuation_with_priority (&dispatch_gtk_task, ml,
GNUNET_SCHEDULER_REASON_STARTUP,
GNUNET_SCHEDULER_PRIORITY_UI);
}
/* Now map back GNUnet scheduler events ... */
#if !WINDOWS
if (NULL != rfds)
GNUNET_NETWORK_fdset_zero (rfds);
if (NULL != wfds)
GNUNET_NETWORK_fdset_zero (wfds);
if (NULL != efds)
GNUNET_NETWORK_fdset_zero (efds);
for (ui = 0; ui < fd_counter; ui++)
{
int set = 0;
if ((NULL != rfds) &&
(set |=
(FD_ISSET (ml->cached_poll_array[ui].fd, &aread) &&
(0 !=
(ml->cached_poll_array[ui].
revents & (G_IO_IN | G_IO_HUP | G_IO_ERR))))))
GNUNET_NETWORK_fdset_set_native (rfds, ml->cached_poll_array[ui].fd);
if ((NULL != wfds) &&
(set |=
(FD_ISSET (ml->cached_poll_array[ui].fd, &awrite) &&
(0 != (ml->cached_poll_array[ui].revents & (G_IO_OUT | G_IO_ERR))))))
GNUNET_NETWORK_fdset_set_native (wfds, ml->cached_poll_array[ui].fd);
if ((NULL != efds) &&
(set |=
(FD_ISSET (ml->cached_poll_array[ui].fd, &aexcept) &&
(0 != (ml->cached_poll_array[ui].revents & G_IO_ERR)))))
GNUNET_NETWORK_fdset_set_native (efds, ml->cached_poll_array[ui].fd);
if (set)
result++;
}
#else
if (socks > 0)
{
struct timeval tvslice;
tvslice.tv_sec = 0;
tvslice.tv_usec = 0;
select_ret = select (max_nfds, &aread, &awrite, &aexcept, &tvslice);
if (select_ret == -1)
select_ret = 0;
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "select() returned %d\n", select_ret);
#endif
}
if (always_ready_write_fd >= 0 &&
ml->cached_poll_array[always_ready_write_fd].revents & G_IO_OUT)
{
GNUNET_CONTAINER_slist_append (ml->handles_write, wfds->handles);
result += GNUNET_CONTAINER_slist_count (ml->handles_write);
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Added write pipe\n");
#endif
}
for (i = 0; i < read_handles; i++)
{
DWORD error;
BOOL bret;
if (!(ml->cached_poll_array[i].revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)))
continue;
SetLastError (0);
waitstatus = 0;
bret =
PeekNamedPipe (ml->read_array[i]->h, NULL, 0, NULL, &waitstatus, NULL);
error = GetLastError ();
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Peek at read pipe %d (0x%x) returned %d (%d bytes available) GLE %u\n",
i, ml->read_array[i]->h, bret, waitstatus, error);
#endif
if (bret == 0 || (ml->cached_poll_array[i].revents & G_IO_ERR))
{
if (efds != NULL)
{
struct GNUNET_CONTAINER_SList_Iterator t;
for (t = GNUNET_CONTAINER_slist_begin (efds->handles), i = 0;
GNUNET_CONTAINER_slist_end (&t) != GNUNET_YES;
GNUNET_CONTAINER_slist_next (&t), i += 1)
{
struct GNUNET_DISK_FileHandle *fh =
GNUNET_CONTAINER_slist_get (&t, NULL);
if (fh == ml->read_array[i])
{
GNUNET_CONTAINER_slist_add (ml->handles_except,
GNUNET_CONTAINER_SLIST_DISPOSITION_TRANSIENT,
fh,
sizeof (struct GNUNET_DISK_FileHandle));
break;
}
}
}
}
else if (waitstatus <= 0)
continue;
GNUNET_CONTAINER_slist_add (ml->handles_read,
GNUNET_CONTAINER_SLIST_DISPOSITION_TRANSIENT,
ml->read_array[i],
sizeof (struct GNUNET_DISK_FileHandle));
result += 1;
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Added read Pipe 0x%x (0x%x)\n",
ml->read_array[i], ml->read_array[i]->h);
#endif
}
waitstatus = WaitForSingleObject (ml->hEventWrite, 0);
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Wait for the write event returned %d\n",
waitstatus);
#endif
if (waitstatus == WAIT_OBJECT_0)
{
for (ui = 0; ui < wfds->sds.fd_count; ui++)
{
DWORD error;
int status;
int so_error = 0;
int sizeof_so_error = sizeof (so_error);
int gso_result = getsockopt (wfds->sds.fd_array[ui],
SOL_SOCKET, SO_ERROR,
(char *) &so_error, &sizeof_so_error);
status = send (wfds->sds.fd_array[ui], NULL, 0, 0);
error = GetLastError ();
#if DEBUG_EVENTLOOP
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"send to the socket %u returned %d (%u)\n", ui, status,
error);
#endif
if (status == 0 || (error != WSAEWOULDBLOCK && error != WSAENOTCONN) ||
(status == -1 && gso_result == 0 && error == WSAENOTCONN &&
so_error == WSAECONNREFUSED))
{
FD_SET (wfds->sds.fd_array[ui], &awrite);
result += 1;
}
}
}
if (rfds)
{
struct GNUNET_CONTAINER_SList_Iterator t;
for (ui = 0; ui < rfds->sds.fd_count; ui++)
WSAEventSelect (rfds->sds.fd_array[ui], ml->hEventRead, 0);
for (t = GNUNET_CONTAINER_slist_begin (rfds->handles);
GNUNET_CONTAINER_slist_end (&t) != GNUNET_YES;
GNUNET_CONTAINER_slist_next (&t))
{
struct GNUNET_DISK_FileHandle *fh = GNUNET_CONTAINER_slist_get (&t, NULL);
if (fh->type == GNUNET_PIPE)
CancelIo (fh->h);
}
GNUNET_NETWORK_fdset_zero (rfds);
if (select_ret != -1 && socks > 0)
GNUNET_NETWORK_fdset_copy_native (rfds, &aread, select_ret);
GNUNET_CONTAINER_slist_append (rfds->handles, ml->handles_read);
}
if (wfds)
{
for (ui = 0; ui < wfds->sds.fd_count; ui++)
WSAEventSelect (wfds->sds.fd_array[ui], ml->hEventWrite, 0);
GNUNET_NETWORK_fdset_zero (wfds);
if (select_ret != -1 && socks > 0)
GNUNET_NETWORK_fdset_copy_native (wfds, &awrite, select_ret);
GNUNET_CONTAINER_slist_append (wfds->handles, ml->handles_write);
}
if (efds)
{
for (ui = 0; ui < efds->sds.fd_count; ui++)
WSAEventSelect (efds->sds.fd_array[ui], ml->hEventException, 0);
GNUNET_NETWORK_fdset_zero (efds);
if (select_ret != -1 && socks > 0)
GNUNET_NETWORK_fdset_copy_native (efds, &aexcept, select_ret);
GNUNET_CONTAINER_slist_append (efds->handles, ml->handles_except);
result += GNUNET_CONTAINER_slist_count (ml->handles_except);
}
if (fd_counter > 0)
/* This is not accurate (select_ret counts write-ready sockets,
* and result does as well. Anything out there actually cares
* about this?
*/
result = select_ret + result;
else
result = 0;
#endif
return result;
}
/**
* Actual main function run right after GNUnet's scheduler
* is initialized. Initializes up GTK and Glade and starts the
* combined event loop.
*
* @param cls the 'struct GNUNET_GTK_MainLoop'
* @param args leftover command line arguments (go to gtk)
* @param cfgfile name of the configuration file
* @param cfg handle to the configuration
*/
static void
run_main_loop (void *cls, char *const *args, const char *cfgfile,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
struct GNUNET_GTK_MainLoop *ml = cls;
int argc;
/* command-line processing for Gtk arguments */
argc = 0;
while (args[argc] != NULL)
argc++;
gtk_init (&argc, (char ***) &args);
ml->rs = GNUNET_NETWORK_fdset_create ();
ml->ws = GNUNET_NETWORK_fdset_create ();
ml->gml = g_main_loop_new (NULL, TRUE);
ml->gmc = g_main_loop_get_context (ml->gml);
ml->cfg = cfg;
ml->cfgfile = GNUNET_strdup (cfgfile);
#if WINDOWS
ml->hEventRead = CreateEvent (NULL, TRUE, FALSE, NULL);
ml->hEventReadReady = CreateEvent (NULL, TRUE, TRUE, NULL);
ml->hEventWrite = CreateEvent (NULL, TRUE, FALSE, NULL);
ml->hEventException = CreateEvent (NULL, TRUE, FALSE, NULL);
ml->hEventPipeWrite = CreateEvent (NULL, TRUE, TRUE, NULL);
ml->handles_read = GNUNET_CONTAINER_slist_create ();
ml->handles_write = GNUNET_CONTAINER_slist_create ();
ml->handles_except = GNUNET_CONTAINER_slist_create ();
ml->read_array = NULL;
ml->read_array_length = 0;
#endif
/* run main task of the application */
GNUNET_SCHEDULER_add_continuation (ml->main_task, ml,
GNUNET_SCHEDULER_REASON_STARTUP);
/* start the Gtk event loop */
GNUNET_assert (TRUE == g_main_context_acquire (ml->gmc));
GNUNET_SCHEDULER_set_select (&gnunet_gtk_select, ml);
/* keep Gtk event loop running even if there are no GNUnet tasks */
ml->dummy_task =
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
&keepalive_task, ml);
}
/**
* Initialize the main loop.
*
* @param binary_name binary name
* @param binary_help help text for the binary
* @param argc number of command line options
* @param argv command line options
* @param options allowed command line options
* @param main_window_file glade file for the main window
* @param main_task first task to run, closure will be set to the 'struct GNUNET_GTK_MainLoop'
* @return GNUNET_OK on success, GNUNET_SYSERR on error (i.e. bad command-line options, etc)
*/
int
GNUNET_GTK_main_loop_start (const char *binary_name, const char *binary_help,
int argc, char *const *argv,
struct GNUNET_GETOPT_CommandLineOption *options,
const char *main_window_file,
GNUNET_SCHEDULER_Task main_task)
{
struct GNUNET_GTK_MainLoop ml;
int ret;
memset (&ml, 0, sizeof (ml));
ml.main_window_file = main_window_file;
ml.main_task = main_task;
ret =
GNUNET_PROGRAM_run (argc, argv, binary_name, binary_help, options,
&run_main_loop, &ml);
if (NULL != ml.cached_poll_array)
g_free (ml.cached_poll_array);
if (NULL != ml.rs)
GNUNET_NETWORK_fdset_destroy (ml.rs);
if (NULL != ml.ws)
GNUNET_NETWORK_fdset_destroy (ml.ws);
if (NULL != ml.builder)
g_object_unref (G_OBJECT (ml.builder));
if (NULL != ml.gml)
g_main_loop_unref (ml.gml);
GNUNET_free_non_null (ml.cfgfile);
return ret;
}
/* end of eventloop.c */
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