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/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "event2/watch.h"
#include "event-internal.h"
#include "evthread-internal.h"
static inline struct evwatch *
evwatch_new(struct event_base *base, union evwatch_cb callback, void *arg, unsigned type)
{
struct evwatch *watcher = mm_malloc(sizeof(struct evwatch));
if (!watcher)
return NULL;
watcher->base = base;
watcher->type = type;
watcher->callback = callback;
watcher->arg = arg;
EVBASE_ACQUIRE_LOCK(base, th_base_lock);
TAILQ_INSERT_TAIL(&base->watchers[type], watcher, next);
EVBASE_RELEASE_LOCK(base, th_base_lock);
return watcher;
}
struct evwatch *
evwatch_prepare_new(struct event_base *base, evwatch_prepare_cb callback, void *arg)
{
union evwatch_cb cb = { .prepare = callback };
return evwatch_new(base, cb, arg, EVWATCH_PREPARE);
}
struct evwatch *
evwatch_check_new(struct event_base *base, evwatch_check_cb callback, void *arg)
{
union evwatch_cb cb = { .check = callback };
return evwatch_new(base, cb, arg, EVWATCH_CHECK);
}
struct event_base *
evwatch_base(struct evwatch *watcher)
{
return watcher->base;
}
void
evwatch_free(struct evwatch *watcher)
{
EVBASE_ACQUIRE_LOCK(watcher->base, th_base_lock);
TAILQ_REMOVE(&watcher->base->watchers[watcher->type], watcher, next);
EVBASE_RELEASE_LOCK(watcher->base, th_base_lock);
mm_free(watcher);
}
int
evwatch_prepare_get_timeout(const struct evwatch_prepare_cb_info *info, struct timeval *timeout)
{
if (info->timeout) {
*timeout = *(info->timeout);
return 1;
}
return 0;
}
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