/* Copyright (C) 2006, 2007 Free Software Foundation, Inc.   This file is part of the GNU C Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  *//* We define a special synchronization primitive for AIO.  POSIX   conditional variables would be ideal but the pthread_cond_*wait   operations do not return on EINTR.  This is a requirement for   correct aio_suspend and lio_listio implementations.  */#include <assert.h>#include <pthreadP.h>#include <lowlevellock.h>#define DONT_NEED_AIO_MISC_COND	1#define AIO_MISC_NOTIFY(waitlist) \  do {									      \    if (*waitlist->counterp > 0 && --*waitlist->counterp == 0)		      \      lll_futex_wake (waitlist->counterp, 1, LLL_PRIVATE);		      \  } while (0)#define AIO_MISC_WAIT(result, futex, timeout, cancel)			      \  do {									      \    volatile int *futexaddr = &futex;					      \    int oldval = futex;							      \									      \    if (oldval != 0)							      \      {									      \	pthread_mutex_unlock (&__aio_requests_mutex);			      \									      \	int oldtype;							      \	if (cancel)							      \	  oldtype = LIBC_CANCEL_ASYNC ();				      \									      \	int status;							      \	do								      \	  {								      \	    status = lll_futex_timed_wait (futexaddr, oldval, timeout,	      \					   LLL_PRIVATE);		      \	    if (status != -EWOULDBLOCK)					      \	      break;							      \									      \	    oldval = *futexaddr;					      \	  }								      \	while (oldval != 0);						      \									      \	if (cancel)							      \	  LIBC_CANCEL_RESET (oldtype);					      \									      \	if (status == -EINTR)						      \	  result = EINTR;						      \	else if (status == -ETIMEDOUT)					      \	  result = EAGAIN;						      \	else								      \	  assert (status == 0 || status == -EWOULDBLOCK);		      \									      \	pthread_mutex_lock (&__aio_requests_mutex);			      \      }									      \  } while (0)#include_next <aio_misc.h>