Serialize access to resources.

A mutual exclusion class PMMutex protects resources (such as files, data in memory, and peripheral devices) from simultaneous access by several processes. Class also enable threads to serialize their access to resources.

None of the functions in this class throws exceptions because an exception probably has been thrown already or is about to be thrown.

You can construct and destruct objects of this class.

Source:

pm_mutex.h:32

Author:

Dmitry A.Steklenev

Version:

$Revision: 1.2 $

Entity	Inherited From	Type	Scope	Short Description
PMMutex		constructor	public	Constructs the mutual exclusion object.
~PMMutex		destructor	public	Destructs the mutual exclusion object.
request		method	public	Request access to resource.
request		method	public	Request access to resource with wait timeout.
release		method	public	Relinquishes ownership of a resource that was requested by request.

Constructs the mutual exclusion object.

Source:

pm_mutex.h:35

Code:

public PMMutex (

)

Destructs the mutual exclusion object.

Source:

pm_mutex.h:37

Code:

public ~ PMMutex ( )

Request access to resource.

Requests ownership of a resource. Blocks the calling thread indefinitely.

Source:

pm_mutex.h:48

Returns:

TRUE, if ownership established.

Code:

public BOOL request (

)

Request access to resource with wait timeout.

Requests ownership of a resource. Blocks the calling thread.

Source:

pm_mutex.h:62

Param:

mseq	this is the maximum amount of time the user wants to allow the thread to be blocked.

Returns:

TRUE, if ownership established.

Code:

public BOOL request (

unsigned long msec )

Relinquishes ownership of a resource that was requested by request.

Only the thread that owns the resource can issue release().

Source:

pm_mutex.h:73

Returns:

TRUE, if ownership relinquished.

Code:

public BOOL release (

)