SEM.h.vx-xxx-xxx File Reference

Simple semaphore, VXWORKS implementation dependent definitions. More...

#include <semLib.h>

Typedefs
typedef SEM_ID	SEM
	Typedef for a mutex.
typedef enum _SEM_OPTIONS_M	SEM_OPTIONS_M
	Typedef for enum _SEM_OPTIONS_M.
Enumerations
enum	_SEM_OPTIONS_M {   SEM_OPTIONS_M_PEND_FIFO = SEM_Q_FIFO,   SEM_OPTIONS_M_PEND_PRIORITY = SEM_Q_PRIORITY }
	Enumerations of the bit mask options used to form the options parameter of the SEM_init routine. More...

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Detailed Description

Simple semaphore, VXWORKS implementation dependent definitions.

Author:

JJRussell - russell@slac.stanford.edu

    CVS $Id: SEM.h.vx-xxx-xxx,v 1.2 2004/12/07 16:13:08 russell Exp $

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Typedef Documentation

SEM_OPTIONS_M

Typedef for enum _SEM_OPTIONS_M.

Warning:

Almost no POSIX implementations support any kind of deterministic behaviour when multiple threads are trying to lock the same mutex. It is therefore not portable to architect a program which depends on the pending strategy. It may be used as an optimization strategy on those platforms that support it. The VxWork's platform does support this option.

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Enumeration Type Documentation

enum _SEM_OPTIONS_M

Enumerations of the bit mask options used to form the options parameter of the SEM_init routine.

Enumerator:

SEM_OPTIONS_M_PEND_FIFO	Pend in FIFO order
SEM_OPTIONS_M_PEND_PRIORITY	Pend in PRIORITY order