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authorJakub Jelinek <jakub@redhat.com>2007-07-31 13:33:18 +0000
committerJakub Jelinek <jakub@redhat.com>2007-07-31 13:33:18 +0000
commit32c075e1f01849e161724bbd400ba77244e482cc (patch)
tree5f083a3f352104f32bb6c902d57fa3f294bd8d4d /nptl/pthread_cond_timedwait.c
parentd6220e9ee38c1c9285221b023346201ec5f511b3 (diff)
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Diffstat (limited to 'nptl/pthread_cond_timedwait.c')
-rw-r--r--nptl/pthread_cond_timedwait.c214
1 files changed, 0 insertions, 214 deletions
diff --git a/nptl/pthread_cond_timedwait.c b/nptl/pthread_cond_timedwait.c
deleted file mode 100644
index fdbf43eae8..0000000000
--- a/nptl/pthread_cond_timedwait.c
+++ /dev/null
@@ -1,214 +0,0 @@
-/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
-
-   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.  */
-
-#include <endian.h>
-#include <errno.h>
-#include <sysdep.h>
-#include <lowlevellock.h>
-#include <pthread.h>
-#include <pthreadP.h>
-
-#include <shlib-compat.h>
-
-
-/* Cleanup handler, defined in pthread_cond_wait.c.  */
-extern void __condvar_cleanup (void *arg)
-     __attribute__ ((visibility ("hidden")));
-
-struct _condvar_cleanup_buffer
-{
-  int oldtype;
-  pthread_cond_t *cond;
-  pthread_mutex_t *mutex;
-  unsigned int bc_seq;
-};
-
-int
-__pthread_cond_timedwait (cond, mutex, abstime)
-     pthread_cond_t *cond;
-     pthread_mutex_t *mutex;
-     const struct timespec *abstime;
-{
-  struct _pthread_cleanup_buffer buffer;
-  struct _condvar_cleanup_buffer cbuffer;
-  int result = 0;
-
-  /* Catch invalid parameters.  */
-  if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
-    return EINVAL;
-
-  /* Make sure we are along.  */
-  lll_mutex_lock (cond->__data.__lock);
-
-  /* Now we can release the mutex.  */
-  int err = __pthread_mutex_unlock_usercnt (mutex, 0);
-  if (err)
-    {
-      lll_mutex_unlock (cond->__data.__lock);
-      return err;
-    }
-
-  /* We have one new user of the condvar.  */
-  ++cond->__data.__total_seq;
-  ++cond->__data.__futex;
-  cond->__data.__nwaiters += 1 << COND_CLOCK_BITS;
-
-  /* Remember the mutex we are using here.  If there is already a
-     different address store this is a bad user bug.  Do not store
-     anything for pshared condvars.  */
-  if (cond->__data.__mutex != (void *) ~0l)
-    cond->__data.__mutex = mutex;
-
-  /* Prepare structure passed to cancellation handler.  */
-  cbuffer.cond = cond;
-  cbuffer.mutex = mutex;
-
-  /* Before we block we enable cancellation.  Therefore we have to
-     install a cancellation handler.  */
-  __pthread_cleanup_push (&buffer, __condvar_cleanup, &cbuffer);
-
-  /* The current values of the wakeup counter.  The "woken" counter
-     must exceed this value.  */
-  unsigned long long int val;
-  unsigned long long int seq;
-  val = seq = cond->__data.__wakeup_seq;
-  /* Remember the broadcast counter.  */
-  cbuffer.bc_seq = cond->__data.__broadcast_seq;
-
-  while (1)
-    {
-      struct timespec rt;
-      {
-#ifdef __NR_clock_gettime
-	INTERNAL_SYSCALL_DECL (err);
-	int ret;
-	ret = INTERNAL_SYSCALL (clock_gettime, err, 2,
-				(cond->__data.__nwaiters
-				 & ((1 << COND_CLOCK_BITS) - 1)),
-				&rt);
-# ifndef __ASSUME_POSIX_TIMERS
-	if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (ret, err), 0))
-	  {
-	    struct timeval tv;
-	    (void) gettimeofday (&tv, NULL);
-
-	    /* Convert the absolute timeout value to a relative timeout.  */
-	    rt.tv_sec = abstime->tv_sec - tv.tv_sec;
-	    rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
-	  }
-	else
-# endif
-	  {
-	    /* Convert the absolute timeout value to a relative timeout.  */
-	    rt.tv_sec = abstime->tv_sec - rt.tv_sec;
-	    rt.tv_nsec = abstime->tv_nsec - rt.tv_nsec;
-	  }
-#else
-	/* Get the current time.  So far we support only one clock.  */
-	struct timeval tv;
-	(void) gettimeofday (&tv, NULL);
-
-	/* Convert the absolute timeout value to a relative timeout.  */
-	rt.tv_sec = abstime->tv_sec - tv.tv_sec;
-	rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
-#endif
-      }
-      if (rt.tv_nsec < 0)
-	{
-	  rt.tv_nsec += 1000000000;
-	  --rt.tv_sec;
-	}
-      /* Did we already time out?  */
-      if (__builtin_expect (rt.tv_sec < 0, 0))
-	{
-	  if (cbuffer.bc_seq != cond->__data.__broadcast_seq)
-	    goto bc_out;
-
-	  goto timeout;
-	}
-
-      unsigned int futex_val = cond->__data.__futex;
-
-      /* Prepare to wait.  Release the condvar futex.  */
-      lll_mutex_unlock (cond->__data.__lock);
-
-      /* Enable asynchronous cancellation.  Required by the standard.  */
-      cbuffer.oldtype = __pthread_enable_asynccancel ();
-
-      /* Wait until woken by signal or broadcast.  */
-      err = lll_futex_timed_wait (&cond->__data.__futex,
-				  futex_val, &rt);
-
-      /* Disable asynchronous cancellation.  */
-      __pthread_disable_asynccancel (cbuffer.oldtype);
-
-      /* We are going to look at shared data again, so get the lock.  */
-      lll_mutex_lock(cond->__data.__lock);
-
-      /* If a broadcast happened, we are done.  */
-      if (cbuffer.bc_seq != cond->__data.__broadcast_seq)
-	goto bc_out;
-
-      /* Check whether we are eligible for wakeup.  */
-      val = cond->__data.__wakeup_seq;
-      if (val != seq && cond->__data.__woken_seq != val)
-	break;
-
-      /* Not woken yet.  Maybe the time expired?  */
-      if (__builtin_expect (err == -ETIMEDOUT, 0))
-	{
-	timeout:
-	  /* Yep.  Adjust the counters.  */
-	  ++cond->__data.__wakeup_seq;
-	  ++cond->__data.__futex;
-
-	  /* The error value.  */
-	  result = ETIMEDOUT;
-	  break;
-	}
-    }
-
-  /* Another thread woken up.  */
-  ++cond->__data.__woken_seq;
-
- bc_out:
-
-  cond->__data.__nwaiters -= 1 << COND_CLOCK_BITS;
-
-  /* If pthread_cond_destroy was called on this variable already,
-     notify the pthread_cond_destroy caller all waiters have left
-     and it can be successfully destroyed.  */
-  if (cond->__data.__total_seq == -1ULL
-      && cond->__data.__nwaiters < (1 << COND_CLOCK_BITS))
-    lll_futex_wake (&cond->__data.__nwaiters, 1);
-
-  /* We are done with the condvar.  */
-  lll_mutex_unlock (cond->__data.__lock);
-
-  /* The cancellation handling is back to normal, remove the handler.  */
-  __pthread_cleanup_pop (&buffer, 0);
-
-  /* Get the mutex before returning.  */
-  err = __pthread_mutex_cond_lock (mutex);
-
-  return err ?: result;
-}
-
-versioned_symbol (libpthread, __pthread_cond_timedwait, pthread_cond_timedwait,
-		  GLIBC_2_3_2);