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/*
* Copyright (c) 2002-2013 Balabit
* Copyright (c) 1998-2013 Balázs Scheidler
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "mainloop-io-worker.h"
#include "mainloop-worker.h"
#include "mainloop-call.h"
#include "logqueue.h"
#include "apphook.h"
/************************************************************************************
* I/O worker threads
************************************************************************************/
static struct iv_work_pool main_loop_io_workers;
static void
_release(MainLoopIOWorkerJob *self)
{
if (self->release)
self->release(self->user_data);
}
static void
_engage(MainLoopIOWorkerJob *self)
{
if (self->engage)
self->engage(self->user_data);
}
gboolean
main_loop_io_worker_job_submit(MainLoopIOWorkerJob *self, gpointer arg)
{
main_loop_assert_main_thread();
g_assert(self->working == FALSE);
if (main_loop_workers_quit)
return FALSE;
_engage(self);
main_loop_worker_job_start();
self->working = TRUE;
self->arg = arg;
iv_work_pool_submit_work(&main_loop_io_workers, &self->work_item);
return TRUE;
}
#if SYSLOG_NG_HAVE_IV_WORK_POOL_SUBMIT_CONTINUATION
void
main_loop_io_worker_job_submit_continuation(MainLoopIOWorkerJob *self, gpointer arg)
{
main_loop_assert_worker_thread();
g_assert(self->working == FALSE);
_engage(self);
main_loop_worker_job_start();
self->working = TRUE;
self->arg = arg;
iv_work_pool_submit_continuation(&main_loop_io_workers, &self->work_item);
}
#endif
/* NOTE: runs in the actual worker thread spawned by the
* main_loop_io_workers thread pool */
static void
_work(MainLoopIOWorkerJob *self)
{
self->work(self->user_data, self->arg);
main_loop_worker_invoke_batch_callbacks();
main_loop_worker_run_gc();
}
/* NOTE: runs in the main thread */
static void
_complete(MainLoopIOWorkerJob *self)
{
self->working = FALSE;
if (self->completion)
self->completion(self->user_data, self->arg);
main_loop_worker_job_complete();
_release(self);
}
void
main_loop_io_worker_job_init(MainLoopIOWorkerJob *self)
{
IV_WORK_ITEM_INIT(&self->work_item);
self->work_item.cookie = self;
self->work_item.work = (void (*)(void *)) _work;
self->work_item.completion = (void (*)(void *)) _complete;
}
static gint
get_processor_count(void)
{
#ifdef _SC_NPROCESSORS_ONLN
return sysconf(_SC_NPROCESSORS_ONLN);
#else
return -1;
#endif
}
static void
main_loop_io_worker_thread_start(void *cookie)
{
main_loop_worker_thread_start(MLW_ASYNC_WORKER);
}
static void
main_loop_io_worker_thread_stop(void *cookie)
{
main_loop_worker_thread_stop();
}
static void
__pre_pre_init_hook(gint type, gpointer user_data)
{
main_loop_worker_allocate_thread_space(main_loop_io_workers.max_threads);
}
void
main_loop_io_worker_init(void)
{
if (main_loop_io_workers.max_threads == 0)
{
main_loop_io_workers.max_threads = MIN(MAX(MAIN_LOOP_MIN_WORKER_THREADS, get_processor_count()),
MAIN_LOOP_MAX_WORKER_THREADS);
}
main_loop_io_workers.thread_start = main_loop_io_worker_thread_start;
main_loop_io_workers.thread_stop = main_loop_io_worker_thread_stop;
iv_work_pool_create(&main_loop_io_workers);
register_application_hook(AH_CONFIG_PRE_PRE_INIT, __pre_pre_init_hook, NULL, AHM_RUN_REPEAT);
}
void
main_loop_io_worker_deinit(void)
{
iv_work_pool_put(&main_loop_io_workers);
}
static GOptionEntry main_loop_io_worker_options[] =
{
{ "worker-threads", 0, 0, G_OPTION_ARG_INT, &main_loop_io_workers.max_threads, "Set the number of I/O worker threads", "<max>" },
{ NULL },
};
void
main_loop_io_worker_add_options(GOptionContext *ctx)
{
g_option_context_add_main_entries(ctx, main_loop_io_worker_options, NULL);
}
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