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pthread_rwlock.h
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1/*
2 * Copyright (C) 2014 René Kijewski <rene.kijewski@fu-berlin.de>
3 *
4 * This file is subject to the terms and conditions of the GNU Lesser
5 * General Public License v2.1. See the file LICENSE in the top level
6 * directory for more details.
7 */
8
17#ifndef PTHREAD_RWLOCK_H
18#define PTHREAD_RWLOCK_H
19
20#include "priority_queue.h"
21#include "thread.h"
22
23#include <errno.h>
24#include <stdbool.h>
25
26#ifdef __cplusplus
27extern "C" {
28#endif
29
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100
110
119int pthread_rwlock_timedrdlock(pthread_rwlock_t *rwlock, const struct timespec *abstime);
120
129
139
148int pthread_rwlock_timedwrlock(pthread_rwlock_t *rwlock, const struct timespec *abstime);
149
160
167
174
175#ifdef __cplusplus
176}
177#endif
178
179#endif /* PTHREAD_RWLOCK_H */
180
A simple priority queue.
int pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
Try to lock a reader/writer lock for writing.
int pthread_rwlock_init(pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *attr)
Initialize a reader/writer lock.
int pthread_rwlock_timedwrlock(pthread_rwlock_t *rwlock, const struct timespec *abstime)
Try to acquire a write lock in a given timeframe.
int pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
Lock a reader/writer lock for writing.
int pthread_rwlock_destroy(pthread_rwlock_t *rwlock)
Destroy a reader/writer lock.
int pthread_rwlock_unlock(pthread_rwlock_t *rwlock)
Unlock the reader/writer lock.
bool __pthread_rwlock_blocked_readingly(const pthread_rwlock_t *rwlock)
Internal function to determine of the lock can be acquired for reading.
int pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
Try to lock a reader/writer lock for reader.
bool __pthread_rwlock_blocked_writingly(const pthread_rwlock_t *rwlock)
Internal function to determine of the lock can be acquired for writing.
int pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
Lock a reader/writer lock for reading.
int pthread_rwlock_timedrdlock(pthread_rwlock_t *rwlock, const struct timespec *abstime)
Try to acquire a read lock in a given timeframe.
Internal structure that stores one waiting thread.
thread_t * thread
waiting thread
bool is_writer
false: reader; true: writer
priority_queue_node_t qnode
Node to store in pthread_rwlock_t::queue.
bool continue_
This is not a spurious wakeup.
thread_t holds thread's context data.
Definition thread.h:168
Mutex structure.
Definition mutex.h:146
data type for priority queue nodes
data type for priority queues
A fair reader writer lock.
int readers
The current amount of reader inside the critical section.
mutex_t mutex
Provides mutual exclusion on reading and writing on the structure.
priority_queue_t queue
Queue of waiting threads.
Attributes for a new reader/writer lock.