path: root/src/common/mutex.h

// Copyright (c) rAthena Project (www.rathena.org) - Licensed under GNU GPL
// For more information, see LICENCE in the main folder  

#ifndef _COMMON_MUTEX_H_
#define _COMMON_MUTEX_H_


typedef struct ramutex *ramutex; // Mutex
typedef struct racond *racond; // Condition Var

/**
 * Creates a Mutex 
 *
 * @return not NULL
 */
ramutex ramutex_create();

/** 
 * Destroys a Mutex
 * 
 * @param m - the mutex to destroy
 */
void ramutex_destroy( ramutex m );

/** 
 * Gets a lock
 *
 * @param m - the mutex to lock
 */
void ramutex_lock( ramutex m);

/** 
 * Trys to get the Lock
 * 
 * @param m - the mutex try to lock
 * 
 * @return boolean (true = got the lock)
 */
bool ramutex_trylock( ramutex m );

/** 
 * Unlocks a mutex
 *
 * @param m - the mutex to unlock
 */
void ramutex_unlock( ramutex m);


/** 
 * Creates a Condition variable
 *
 * @return not NULL
 */
racond racond_create();

/** 
 * Destroy a Condition variable
 *
 * @param c - the condition varaible to destroy
 */
void racond_destroy( racond c );

/**
 * Waits Until state is signalled
 * 
 * @param c - the condition var to wait for signalled state 
 * @param m - the mutex used for syncronization
 * @param timeout_ticks - timeout in ticks ( -1 = INFINITE )
 */
void racond_wait( racond c,  ramutex m,  sysint timeout_ticks);

/** 
 * Sets the given condition var to signalled state
 *
 * @param c - condition var to set in signalled state.
 *
 * @note:
 *  Only one waiter gets notified.
 */
void racond_signal( racond c );

/** 
 * Sets notifys all waiting threads thats signalled.
 * @param c - condition var to set in signalled state
 * 
 * @note:
 *  All Waiters getting notified.
 */ 
void racond_broadcast( racond c );


#endif /* _COMMON_MUTEX_H_ */