just::thread Complete C++ Standard Thread Library by Just Software Solutions

The types of the supplied lockable objects LockableType1, LockableType2, ... shall conform to the Lockable requirements.

Tries to acquires a lock on each of the supplied lockable objects m1, m2, ... by calling try_lock() on each in turn. If a call to try_lock() returns false or throws an exception, and locks already acquired are released by calling unlock() on the corresponding lockable object.

-1 if all locks were acquired (each call to try_lock() return true), otherwise the zero-based index of object for which the call to try_lock() returned false.

If the function returns -1, the current thread owns a lock on each of the supplied lockable objects. Otherwise, any locks acquired by this call have been released.

Any exceptions thrown by the calls to try_lock().

If an exception propagates out of the call to std::try_lock then unlock() shall have been called for any of the objects m1, m2, ... for which a lock has been acquired in the function by a call to try_lock().

On compilers that don't support variadic templates, an overloaded set of function templates is provided that supports passing of up to 5 arguments.