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/*  rtems/posix/cond.h
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 *
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 *  This include file contains all the private support information for
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 *  POSIX condition variables.
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 *
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: cond.h,v 1.2 2001-09-27 11:59:14 chris Exp $
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 */
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#ifndef __RTEMS_POSIX_CONDITION_VARIABLES_h
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#define __RTEMS_POSIX_CONDITION_VARIABLES_h
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <rtems/score/object.h>
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#include <rtems/score/threadq.h>
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/*
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 *  Constant to indicate condition variable does not currently have
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 *  a mutex assigned to it.
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 */
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#define POSIX_CONDITION_VARIABLES_NO_MUTEX 0
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/*
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 *  Data Structure used to manage a POSIX condition variable
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 */
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typedef struct {
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   Objects_Control       Object;
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   int                   process_shared;
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   pthread_mutex_t       Mutex;
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   Thread_queue_Control  Wait_queue;
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}  POSIX_Condition_variables_Control;
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/*
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 *  The following defines the information control block used to manage
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 *  this class of objects.
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 */
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POSIX_EXTERN Objects_Information  _POSIX_Condition_variables_Information;
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/*
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 *  The default condition variable attributes structure.
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 */
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extern const pthread_condattr_t _POSIX_Condition_variables_Default_attributes;
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/*
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 *  _POSIX_Condition_variables_Manager_initialization
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 *
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 *  DESCRIPTION:
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 *
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 *  This routine performs the initialization necessary for this manager.
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 */
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void _POSIX_Condition_variables_Manager_initialization(
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  unsigned32 maximum_condition_variables
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);
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/*
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 *  _POSIX_Condition_variables_Allocate
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 *
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 *  DESCRIPTION:
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 *
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 *  This function allocates a condition variable control block from
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 *  the inactive chain of free condition variable control blocks.
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 */
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RTEMS_INLINE_ROUTINE POSIX_Condition_variables_Control *
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  _POSIX_Condition_variables_Allocate( void );
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/*
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 *  _POSIX_Condition_variables_Free
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 *
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 *  DESCRIPTION:
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 *
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 *  This routine frees a condition variable control block to the
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 *  inactive chain of free condition variable control blocks.
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 */
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RTEMS_INLINE_ROUTINE void _POSIX_Condition_variables_Free (
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  POSIX_Condition_variables_Control *the_condition_variable
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);
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/*
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 *  _POSIX_Condition_variables_Get
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 *
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 *  DESCRIPTION:
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 *
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 *  This function maps condition variable IDs to condition variable control
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 *  blocks.  If ID corresponds to a local condition variable, then it returns
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 *  the_condition variable control pointer which maps to ID and location
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 *  is set to OBJECTS_LOCAL.  if the condition variable ID is global and
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 *  resides on a remote node, then location is set to OBJECTS_REMOTE,
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 *  and the_condition variable is undefined.  Otherwise, location is set
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 *  to OBJECTS_ERROR and the_condition variable is undefined.
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 */
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RTEMS_INLINE_ROUTINE POSIX_Condition_variables_Control *_POSIX_Condition_variables_Get (
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  Objects_Id        *id,
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  Objects_Locations *location
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);
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/*
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 *  _POSIX_Condition_variables_Is_null
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 *
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 *  DESCRIPTION:
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 *
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 *  This function returns TRUE if the_condition variable is NULL
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 *  and FALSE otherwise.
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 */
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RTEMS_INLINE_ROUTINE boolean _POSIX_Condition_variables_Is_null (
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  POSIX_Condition_variables_Control *the_condition_variable
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);
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/*
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 *  _POSIX_Condition_variables_Signal_support
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 *
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 *  DESCRIPTION:
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 *
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 *  A support routine which implements guts of the broadcast and single task
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 *  wake up version of the "signal" operation.
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 */
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int _POSIX_Condition_variables_Signal_support(
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  pthread_cond_t            *cond,
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  boolean                    is_broadcast
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);
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/*
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 *  _POSIX_Condition_variables_Wait_support
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 *
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 *  DESCRIPTION:
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 *
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 *  A support routine which implements guts of the blocking, non-blocking, and
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 *  timed wait version of condition variable wait routines.
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 */
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int _POSIX_Condition_variables_Wait_support(
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  pthread_cond_t            *cond,
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  pthread_mutex_t           *mutex,
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  Watchdog_Interval          timeout,
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  boolean                    already_timedout
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);
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#include <rtems/posix/cond.inl>
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#if defined(RTEMS_MULTIPROCESSING)
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#include <rtems/posix/condmp.h>
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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/*  end of include file */
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