124 lines
2.6 KiB
C
124 lines
2.6 KiB
C
/*
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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 mutex mutex
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* @{ @ingroup utils
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*/
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#ifndef MUTEX_H_
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#define MUTEX_H_
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typedef struct mutex_t mutex_t;
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typedef struct condvar_t condvar_t;
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typedef enum mutex_type_t mutex_type_t;
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typedef enum condvar_type_t condvar_type_t;
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#include <library.h>
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/**
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* Type of mutex.
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*/
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enum mutex_type_t {
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/** default mutex */
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MUTEX_DEFAULT = 0,
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/** allow recursive locking of the mutex */
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MUTEX_RECURSIVE = 1,
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};
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/**
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* Type of condvar.
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*/
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enum condvar_type_t {
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/** default condvar */
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CONDVAR_DEFAULT = 0,
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};
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/**
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* Mutex wrapper implements simple, portable and advanced mutex functions.
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*/
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struct mutex_t {
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/**
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* Acquire the lock to the mutex.
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*/
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void (*lock)(mutex_t *this);
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/**
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* Release the lock on the mutex.
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*/
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void (*unlock)(mutex_t *this);
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/**
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* Destroy a mutex instance.
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*/
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void (*destroy)(mutex_t *this);
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};
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/**
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* Condvar wrapper to use in conjunction with mutex_t.
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*/
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struct condvar_t {
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/**
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* Wait on a condvar until it gets signalized.
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*
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* @param mutex mutex to release while waiting
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*/
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void (*wait)(condvar_t *this, mutex_t *mutex);
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/**
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* Wait on a condvar until it gets signalized, or times out.
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*
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* @param mutex mutex to release while waiting
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* @param timeout timeout im ms
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* @return TRUE if timed out, FALSE otherwise
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*/
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bool (*timed_wait)(condvar_t *this, mutex_t *mutex, u_int timeout);
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/**
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* Wake up a single thread in a condvar.
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*/
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void (*signal)(condvar_t *this);
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/**
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* Wake up all threads in a condvar.
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*/
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void (*broadcast)(condvar_t *this);
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/**
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* Destroy a condvar and free its resources.
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*/
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void (*destroy)(condvar_t *this);
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};
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/**
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* Create a mutex instance.
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*
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* @param type type of mutex to create
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* @return unlocked mutex instance
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*/
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mutex_t *mutex_create(mutex_type_t type);
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/**
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* Create a condvar instance.
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*
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* @param type type of condvar to create
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* @return condvar instance
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*/
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condvar_t *condvar_create(condvar_type_t type);
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#endif /* MUTEX_H_ @}*/
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