class Lockable

Abstract interface for lockable objects. More...

Contains pure virtuals
Full nameTelEngine::Lockable
Definition#include <yateclass.h>
Inherited byClientAccount, ClientAccountList, ClientDriver, DataSource, Driver, MessageDispatcher, Module, Mutex, Semaphore, SharedVars, ThreadedSource
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Detailed Description

An abstract base class for implementing lockable objects

 ~Lockable ()

~Lockable

[virtual]

Destructor

bool  lock (long maxwait = -1)

lock

[pure virtual]

Attempt to lock the object and eventually wait for it

Parameters:
maxwaitTime in microseconds to wait, -1 wait forever

Returns: True if successfully locked, false on failure

bool  unlock ()

unlock

[pure virtual]

Unlock the object, does never wait

Returns: True if successfully unlocked the object

bool  locked ()

locked

[const pure virtual]

Check if the object is currently locked - as it's asynchronous it guarantees nothing if other thread changes the status

Returns: True if the object was locked when the function was called

bool  check (long maxwait = -1)

check

[virtual]

Check if the object is unlocked (try to lock and unlock it)

Parameters:
maxwaitTime in microseconds to wait, -1 to wait forever

Returns: True if successfully locked and unlocked, false on failure

bool  unlockAll ()

unlockAll

[virtual]

Fully unlock the object, even if it was previously multiple locked. There is no guarantee about the object status after the function returns. This function should be used only if you understand it very well

Returns: True if the object was fully unlocked

void  wait (unsigned long maxwait)

wait

[static]

Set a maximum wait time for debugging purposes

Parameters:
maxwaitMaximum time in microseconds to wait for any lockable object when no time limit was requested, zero to disable limit

unsigned long  wait ()

wait

[static]

Get the maximum wait time used for debugging purposes

Returns: Maximum time in microseconds, zero if no maximum is set

void  startUsingNow ()

startUsingNow

[static]

Start actually using lockables, for platforms where these objects are not usable in global object constructors. This method must be called at least once somewhere from main() but before creating any threads and without holding any object locked.

void  disableSafety ()

disableSafety

[static]

Disable some safety and sanity check features. This provides a performance improvement but makes the code less safe and more difficult to debug locking issues.


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