Scoped transfer of mutex ownership between two locks. More...

#include <Transfer.h>

Inheritance diagram for honey::TransferLock< FromLock, ToLock >:

Collaboration diagram for honey::TransferLock< FromLock, ToLock >:

Public Types
typedef ToLock::Lockable	Lockable

Public Member Functions
	TransferLock (FromLock &lock)
	Transfer ownership of mutex from `lock` to an instance of ToLock. More...

	~TransferLock ()

void	lock ()

void	unlock ()

bool	owns () const

	operator bool () const

Lockable &	mutex ()

Lockable &	release ()

Detailed Description

template<class FromLock, class ToLock>
class honey::TransferLock< FromLock, ToLock >

Scoped transfer of mutex ownership between two locks.

Ownership is transferred to ToLock on construction, and then returned to FromLock on destruction.

This class can be used to atomically acquire a unique writer lock from a shared reader lock:

SharedMutex mutex;
SharedMutex::SharedScoped readLock(mutex);
//Read ownership acquired, read data...
{
    TransferLock<decltype(readLock), SharedMutex::Scoped> writeLock(readLock);
    //Write ownership acquired in this scope, write data...
}
//Read ownership re-acquired