81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
/*
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* Copyright (C) 2008-2009 Tobias Brunner
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* Copyright (C) 2008 Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/**
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* @defgroup rwlock rwlock
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* @{ @ingroup threading
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*/
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#ifndef THREADING_RWLOCK_H_
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#define THREADING_RWLOCK_H_
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typedef struct rwlock_t rwlock_t;
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typedef enum rwlock_type_t rwlock_type_t;
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/**
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* Type of read-write lock.
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*/
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enum rwlock_type_t {
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/** default condvar */
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RWLOCK_TYPE_DEFAULT = 0,
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};
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/**
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* Read-Write lock wrapper.
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*/
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struct rwlock_t {
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/**
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* Acquire the read lock.
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*/
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void (*read_lock)(rwlock_t *this);
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/**
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* Acquire the write lock.
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*/
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void (*write_lock)(rwlock_t *this);
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/**
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* Try to acquire the write lock.
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*
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* Never blocks, but returns FALSE if the lock was already occupied.
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*
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* @return TRUE if lock acquired
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*/
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bool (*try_write_lock)(rwlock_t *this);
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/**
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* Release any acquired lock.
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*/
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void (*unlock)(rwlock_t *this);
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/**
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* Destroy the read-write lock.
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*/
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void (*destroy)(rwlock_t *this);
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};
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/**
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* Create a read-write lock instance.
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*
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* @param type type of rwlock to create
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* @return unlocked rwlock instance
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*/
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rwlock_t *rwlock_create(rwlock_type_t type);
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#endif /** THREADING_RWLOCK_H_ @} */
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