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GLAST/LAT > DAQ and FSW > FSW > Doxygen Index > PBS / V2-10-5

Constituent: pbs     Tag: linux-gcc

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RW.ih.px-xxx-xxx File Reference

Defines the POSIX platform dependent inline Resource Wait (RW) routines. More...

#include <pthread.h>
#include "PBS/BUG.h"

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Functions
RW__EXP_FNC RW_key	RW__lock (RW_ctl *rw)
	Locks a resource so it can be manipulated in an interlocked fashion.
RW__EXP_FNC RW_keys	RW__lock2 (RW_ctl *rw_0, RW_ctl *rw_1)
	Locks two resource so they can be manipulated in an interlocked fashion.
RW__EXP_FNC int	RW__unlock (RW_ctl *rw, RW_key key)
	This routine unlocks a previously locked resource.
RW__EXP_FNC int	RW__unlock2 (RW_ctl *rw_0, RW_ctl *rw_1, RW_keys keys)
	This routine unlocks a previously locked resource.
RW__EXP_FNC int	RW__wait (RW_ctl *rw, RW_key key)
	Blocks a task/thread until there is a reasonable chance that a resource is available.
RW__EXP_FNC RW_key	RW__wake (RW_ctl *rw, RW_key key)
	This provides the signaling mechanism to wake up a thread of code which is waiting for a resource.

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Detailed Description

Defines the POSIX platform dependent inline Resource Wait (RW) routines.

Author:

JJRussell - russell@slac.stanford.edu

   CVS $Id: RW.ih.px-xxx-xxx,v 1.3 2004/10/20 14:36:52 russell Exp $
  

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Function Documentation

RW_key RW__lock (  RW_ctl *  rw  )

Locks a resource so it can be manipulated in an interlocked fashion. Returns: A key to be passed to the RW__unlock routine. Parameters: rw  The RW handle

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RW_keys RW__lock2 (  RW_ctl *  rw_0, RW_ctl *  rw_1 )

Locks two resource so they can be manipulated in an interlocked fashion. Returns: A set of keys to be passed to the RW__unlock2 routine Parameters: rw_0  The RW handle of the first resource to be locked rw_1  The RW handle of the second resource to be locked

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int RW__unlock (  RW_ctl *  rw, RW_key  key )

This routine unlocks a previously locked resource. Parameters: rw  The RW handle key  The key used to lock the resource, returned from RW__lock

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int RW__unlock2 (  RW_ctl *  rw_0, RW_ctl *  rw_1, RW_keys  keys )

This routine unlocks a previously locked resource. Parameters: rw_0  The RW handle of the first resource to be unlocked rw_1  The RW handle of the second resource to be unlocked keys  The keys used to lock the resources, returned from RW_lock2

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int RW__wait (  RW_ctl *  rw, RW_key  key )

Blocks a task/thread until there is a reasonable chance that a resource is available. Parameters: rw  The RW handle key  The key used to unlock the interrupts Returns: Status

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int RW__wake (  RW_ctl *  rw, RW_key  key )

This provides the signaling mechanism to wake up a thread of code which is waiting for a resource. Parameters: rw  The RW handle key  The key used to unlock the resource. Return values: Status  This routine checks if any thread is waiting for a resource, and if so wakes that thread. The resource should be locked on entry to this routine. This routine always exits with the resource still locked.

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