MapleMutexLock - Maple Programming Help

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MapleMutexLock

lock a mutex

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

MapleMutexLock( kv, mutex );

Parameters

kv

-

kernel handle of type MKernelVector

mutex

-

a mutex identifier (ALGEB)

Description

• 

MapleMutexLock locks a mutex.  Only one thread can have a mutex locked at any one time.  If another thread is holding the lock, the current thread will block until it can obtain the lock.

• 

To release the lock on a mutex, use the MapleMutexUnlock function.

• 

A mutex can be created in external call using the MapleMutexCreate function.

• 

The mutex identifier used by MapleMutexLock is compatible with the functions in the Threads[Mutex] package.  Thus mutexes created by Threads[Mutex][Create] can be passed into external call, and used by MapleMutexLock and MapleMutexUnlock.

Examples

#include "maplec.h"

 

ALGEB M_DECL ParallelFunction( MKernelVector kv, ALGEB mutex, ALGEB args )

{

    ALGEB ret;

 

    MapleMutexLock( kv, mutex );

    ret = CriticalSection( kv, args );

    MapleMutexUnlock( kv, mutex );

 

    return ret;

}

See Also

CustomWrapper

define_external

MapleMutexCreate

MapleMutexDestroy

MapleMutexUnlock

OpenMaple

OpenMaple/C/API

OpenMaple/C/Examples

OpenMaple/C/MutexDestroy

OpenMaple/C/MutexLock

OpenMaple/C/MutexUnlock

Threads[Mutex]

 


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