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/**
* @file
*
* @brief Establishing Cancellation Handlers
* @ingroup POSIXAPI
*/
/*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <pthread.h>
#include <rtems/score/thread.h>
#include <rtems/score/threaddispatch.h>
#include <rtems/posix/threadsup.h>
#ifndef HAVE_STRUCT__PTHREAD_CLEANUP_CONTEXT
#include <rtems/score/chainimpl.h>
#include <rtems/score/isr.h>
#include <rtems/score/wkspace.h>
#include <rtems/posix/cancel.h>
#include <rtems/posix/pthreadimpl.h>
/*
* 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;
/*
* The POSIX standard does not address what to do when the routine
* is NULL. It also does not address what happens when we cannot
* allocate memory or anything else bad happens.
*/
if ( !routine )
return;
_Thread_Disable_dispatch();
handler = _Workspace_Allocate( sizeof( POSIX_Cancel_Handler_control ) );
if ( handler ) {
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 );
}
_Thread_Enable_dispatch();
}
#else /* HAVE_STRUCT__PTHREAD_CLEANUP_CONTEXT */
void _pthread_cleanup_push(
struct _pthread_cleanup_context *context,
void ( *routine )( void * ),
void *arg
)
{
POSIX_API_Control *thread_support;
context->_routine = routine;
context->_arg = arg;
/* This value is unused, just provide a deterministic value */
context->_canceltype = -1;
_Thread_Disable_dispatch();
thread_support = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ];
context->_previous = thread_support->last_cleanup_context;
thread_support->last_cleanup_context = context;
_Thread_Enable_dispatch();
}
#endif /* HAVE_STRUCT__PTHREAD_CLEANUP_CONTEXT */
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