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/*
* Copyright (c) 2013 Richard Braun.
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* Condition variables.
*/
#ifndef _KERN_CONDITION_H
#define _KERN_CONDITION_H
#include <kern/list.h>
#include <kern/mutex.h>
#include <kern/spinlock.h>
#include <kern/stddef.h>
struct condition {
struct spinlock lock;
struct mutex *mutex;
struct list waiters;
};
#define CONDITION_INITIALIZER(condition) \
{ SPINLOCK_INITIALIZER, NULL, LIST_INITIALIZER((condition).waiters) }
static inline void
condition_init(struct condition *condition)
{
spinlock_init(&condition->lock);
condition->mutex = NULL;
list_init(&condition->waiters);
}
void condition_wait(struct condition *cond, struct mutex *mutex);
void condition_signal(struct condition *cond);
void condition_broadcast(struct condition *cond);
#endif /* _KERN_CONDITION_H */
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