1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/pkg/devices/util/src/event-loop.cc Fri May 18 22:34:51 2018 +0200
1.3 @@ -0,0 +1,62 @@
1.4 +/*
1.5 + * Generic event loop functionality.
1.6 + *
1.7 + * (c) 2018 Paul Boddie <paul@boddie.org.uk>
1.8 + *
1.9 + * This program is free software; you can redistribute it and/or
1.10 + * modify it under the terms of the GNU General Public License as
1.11 + * published by the Free Software Foundation; either version 2 of
1.12 + * the License, or (at your option) any later version.
1.13 + *
1.14 + * This program is distributed in the hope that it will be useful,
1.15 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.17 + * GNU General Public License for more details.
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License
1.20 + * along with this program; if not, write to the Free Software
1.21 + * Foundation, Inc., 51 Franklin Street, Fifth Floor,
1.22 + * Boston, MA 02110-1301, USA
1.23 + */
1.24 +
1.25 +#include "event-loop.h"
1.26 +
1.27 +#include <pthread.h>
1.28 +#include <pthread-l4.h>
1.29 +
1.30 +#include <l4/re/event>
1.31 +
1.32 +/* Main loop for event threads. */
1.33 +
1.34 +void *
1.35 +Event_loop::event_loop(void *data)
1.36 +{
1.37 + Event_loop *self = reinterpret_cast<Event_loop *>(data);
1.38 +
1.39 + while (1) self->handle();
1.40 +
1.41 + return 0;
1.42 +}
1.43 +
1.44 +/* Event loop initiation. */
1.45 +
1.46 +void
1.47 +Event_loop::start()
1.48 +{
1.49 + pthread_attr_t thread_attr;
1.50 + struct sched_param sp;
1.51 +
1.52 + /* Thread initialisation boilerplate. */
1.53 +
1.54 + if (pthread_attr_init(&thread_attr))
1.55 + return;
1.56 +
1.57 + sp.sched_priority = _priority;
1.58 + pthread_attr_setschedparam(&thread_attr, &sp);
1.59 + pthread_attr_setschedpolicy(&thread_attr, SCHED_L4);
1.60 + pthread_attr_setinheritsched(&thread_attr, PTHREAD_EXPLICIT_SCHED);
1.61 +
1.62 + /* Provide this instance as the private data. */
1.63 +
1.64 + pthread_create(&_pthread, &thread_attr, event_loop, this);
1.65 +}