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/*
 *  cleanuppush.c,v 1.2 2001/01/24 14:17:28 joel Exp
 */
 
#if HAVE_CONFIG_H
#include "config.h"
#endif
 
#include <pthread.h>
#include <errno.h>
 
#include <rtems/system.h>
#include <rtems/score/chain.h>
#include <rtems/score/isr.h>
#include <rtems/score/thread.h>
#include <rtems/score/wkspace.h>
#include <rtems/posix/cancel.h>
#include <rtems/posix/pthread.h>
#include <rtems/posix/threadsup.h>
 
/*PAGE
 *
 *  18.2.3.1 Establishing Cancellation Handlers, P1003.1c/Draft 10, p. 184
 */
 
void pthread_cleanup_push(
  void   (*routine)( void * ),
  void    *arg
)
{
  POSIX_Cancel_Handler_control      *handler;
  Chain_Control                     *handler_stack;
  POSIX_API_Control                 *thread_support;
 
  if ( !routine )
    return;          /* XXX what to do really? */ 
 
  handler = _Workspace_Allocate( sizeof( POSIX_Cancel_Handler_control ) );
 
  if ( !handler )
    return;          /* XXX what to do really? */ 
 
  thread_support = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ];
 
  handler_stack = &thread_support->Cancellation_Handlers;
 
  handler->routine = routine;
  handler->arg = arg;
 
  _Chain_Append( handler_stack, &handler->Node );
}