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/*
This file is part of GNUnet
Copyright (C) 2015, 2016 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file curl/curl_reschedule.c
* @brief API for event loop integration with GNUnet SCHEDULER.
* @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet_curl_lib.h"
#include "gnunet_util_lib.h"
/**
* Closure for #GNUNET_CURL_gnunet_scheduler_reschedule().
*/
struct GNUNET_CURL_RescheduleContext
{
/**
* Just the task.
*/
struct GNUNET_SCHEDULER_Task *task;
/**
* Context we manage.
*/
struct GNUNET_CURL_Context *ctx;
};
/**
* Initialize reschedule context.
*
* @param ctx context to manage
* @return closure for #GNUNET_CURL_gnunet_scheduler_reschedule().
*/
struct GNUNET_CURL_RescheduleContext *
GNUNET_CURL_gnunet_rc_create (struct GNUNET_CURL_Context *ctx)
{
struct GNUNET_CURL_RescheduleContext *rc;
rc = GNUNET_new (struct GNUNET_CURL_RescheduleContext);
rc->ctx = ctx;
return rc;
}
/**
* Destroy reschedule context.
*
* @param rc context to destroy
*/
void
GNUNET_CURL_gnunet_rc_destroy (struct GNUNET_CURL_RescheduleContext *rc)
{
if (NULL != rc->task)
GNUNET_SCHEDULER_cancel (rc->task);
GNUNET_free (rc);
}
/**
* Task that runs the context's event loop with the GNUnet scheduler.
*
* @param cls a `struct GNUNET_CURL_RescheduleContext *`
*/
static void
context_task (void *cls)
{
struct GNUNET_CURL_RescheduleContext *rc = cls;
long timeout;
int max_fd;
fd_set read_fd_set;
fd_set write_fd_set;
fd_set except_fd_set;
struct GNUNET_NETWORK_FDSet *rs;
struct GNUNET_NETWORK_FDSet *ws;
struct GNUNET_TIME_Relative delay;
rc->task = NULL;
GNUNET_CURL_perform (rc->ctx);
max_fd = -1;
timeout = -1;
FD_ZERO (&read_fd_set);
FD_ZERO (&write_fd_set);
FD_ZERO (&except_fd_set);
GNUNET_CURL_get_select_info (rc->ctx,
&read_fd_set,
&write_fd_set,
&except_fd_set,
&max_fd,
&timeout);
if (timeout >= 0)
delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
timeout);
else
delay = GNUNET_TIME_UNIT_FOREVER_REL;
rs = GNUNET_NETWORK_fdset_create ();
GNUNET_NETWORK_fdset_copy_native (rs,
&read_fd_set,
max_fd + 1);
ws = GNUNET_NETWORK_fdset_create ();
GNUNET_NETWORK_fdset_copy_native (ws,
&write_fd_set,
max_fd + 1);
if (NULL == rc->task)
rc->task = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
delay,
rs,
ws,
&context_task,
rc);
GNUNET_NETWORK_fdset_destroy (rs);
GNUNET_NETWORK_fdset_destroy (ws);
}
/**
* Implementation of the #GNUNET_CURL_RescheduleCallback for GNUnet's
* scheduler. Will run the CURL context using GNUnet's scheduler.
* Note that you MUST immediately destroy the reschedule context after
* calling #GNUNET_CURL_fini().
*
* @param cls must point to a `struct GNUNET_CURL_RescheduleContext *`
* (pointer to a pointer!)
*/
void
GNUNET_CURL_gnunet_scheduler_reschedule (void *cls)
{
struct GNUNET_CURL_RescheduleContext *rc = *(void**) cls;
if (NULL != rc->task)
GNUNET_SCHEDULER_cancel (rc->task);
rc->task = GNUNET_SCHEDULER_add_now (&context_task,
rc);
}
/* end of curl_reschedule.c */
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