PIMutex Class Reference

Mutex. More...

Public Member Functions
	PIMutex ()
	Constructs unlocked mutex.
void	lock ()
	Lock mutex. More...
void	unlock ()
	Unlock mutex. More...
bool	tryLock ()
	Try to lock mutex. More...
bool	isLocked () const
	Returns if mutex is locked.

Detailed Description

Mutex.

Synopsis

PIMutex provides synchronization blocks between several threads. Using mutex guarantees execution of some code only one of threads. Mutex contains logic state and functions to change it: lock(), unlock() and tryLock().

Usage

Block of code that should to be executed only one thread simultaniously should to be started with lock() and ended with unlock().

mutex.lock();
// ... your code here
mutex.unlock();

"mutex" in this example is one for all threads.

Member Function Documentation

void PIMutex::lock

(

)

Lock mutex.

If mutex is unlocked it set to locked state and returns immediate. If mutex is already locked function blocks until mutex will be unlocked

void PIMutex::unlock

(

)

Unlock mutex.

In any case this function returns immediate

bool PIMutex::tryLock

(

)

Try to lock mutex.

If mutex is unlocked it set to locked state and returns "true" immediate. If mutex is already locked function returns immediate an returns "false"