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#ifndef BU_ITO_MUTEX_H
#define BU_ITO_MUTEX_H
#include <pthread.h>
namespace Bu
{
/**
* Simple mutex wrapper. Currently this doesn't do anything extra for you
* except keep all of the functionality together in an OO sorta' way and keep
* you from having to worry about cleaning up your mutexes properly, or initing
* them.
*@author Mike Buland
*/
class ItoMutex
{
public:
/**
* Create an unlocked mutex.
*/
ItoMutex();
/**
* Destroy a mutex. This can only be done when a mutex is unlocked.
* Failure to unlock before destroying a mutex object could cause it to
* wait for the mutex to unlock, the odds of which are usually farily low
* at deconstruction time.
*/
~ItoMutex();
/**
* Lock the mutex. This causes all future calls to lock on this instance
* of mutex to block until the first thread that called mutex unlocks it.
* At that point the next thread that called lock will get a chance to go
* to work. Because of the nature of a mutex lock it is a very bad idea to
* do any kind of serious or rather time consuming computation within a
* locked section. This can cause thread-deadlock and your program may
* hang.
*/
int lock();
/**
* Unlock the mutex. This allows the next thread that asked for a lock to
* lock the mutex and continue with execution.
*/
int unlock();
/**
* Try to lock the mutex. This is the option to go with if you cannot avoid
* putting lengthy operations within a locked section. trylock will attempt
* to lock the mutex, if the mutex is already locked this function returns
* immediately with an error code.
*/
int trylock();
protected:
pthread_mutex_t mutex; /**< The internal mutex reference. */
};
}
#endif
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