pt-internal.h

/*
 * Copyright (C) 2008 The Android Open Source Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#ifndef _PTHREAD_INTERNAL_H_
#define _PTHREAD_INTERNAL_H_

#include <pthread.h>

struct pthread_internal_t {
  struct pthread_internal_t* next;
  struct pthread_internal_t* prev;

  pid_t tid;

  void** tls;

  volatile pthread_attr_t attr;

  __pthread_cleanup_t* cleanup_stack;

  void* (*start_routine)(void*);
  void* start_routine_arg;
  void* return_value;

  void* alternate_signal_stack;

  /*
   * The dynamic linker implements dlerror(3), which makes it hard for us to implement this
   * per-thread buffer by simply using malloc(3) and free(3).
   */
#define __BIONIC_DLERROR_BUFFER_SIZE 508
  char dlerror_buffer[__BIONIC_DLERROR_BUFFER_SIZE];
	
	//  ugly hack: use last 4 bytes of dlerror_buffer as cancel_lock
	pthread_mutex_t cancel_lock; 
};

/* Has the thread a cancellation request? */
#define PTHREAD_ATTR_FLAG_CANCEL_PENDING 0x00000008

/* Has the thread enabled cancellation? */
#define PTHREAD_ATTR_FLAG_CANCEL_ENABLE 0x00000010

/* Has the thread asyncronous cancellation? */
#define PTHREAD_ATTR_FLAG_CANCEL_ASYNCRONOUS 0x00000020

/* Has the thread a cancellation handler? */
#define PTHREAD_ATTR_FLAG_CANCEL_HANDLER 0x00000040

struct pthread_internal_t *__pthread_getid ( pthread_t );

int __pthread_do_cancel (struct pthread_internal_t *);

void pthread_init(void);

#endif /* _PTHREAD_INTERNAL_H_ */