From 0ef0d3838e6ca261733105bd6fed3fc84751b46a Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Sun, 13 Feb 2000 08:09:42 +0000
Subject: [PATCH] (pthread_cond_timedwait_relative_old): Undo last patch but
 keep the code around.  A bug in the kernel prevent us from using the code.
 (pthread_cond_timedwait_relative_new): Likewise.

---
 linuxthreads/condvar.c | 61 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)

diff --git a/linuxthreads/condvar.c b/linuxthreads/condvar.c
index 38c4423d892..e781793fd2b 100644
--- a/linuxthreads/condvar.c
+++ b/linuxthreads/condvar.c
@@ -134,13 +134,23 @@ pthread_cond_timedwait_relative_old(pthread_cond_t *cond,
 {
   volatile pthread_descr self = thread_self();
   sigset_t unblock, initial_mask;
+#ifdef NANOSLEEP_WORKS
   int already_canceled = 0;
   int was_signalled = 0;
+#else
+  int retsleep;
+  int already_canceled;
+  int was_signalled;
+#endif
   sigjmp_buf jmpbuf;
   pthread_extricate_if extr;
   struct timeval now;
   struct timespec reltime;
 
+#ifndef NANOSLEEP_WORKS
+ requeue_and_wait_again:
+#endif
+
   /* Compute a time offset relative to now.  */
   __gettimeofday (&now, NULL);
   reltime.tv_nsec = abstime->tv_nsec - now.tv_usec * 1000;
@@ -152,6 +162,12 @@ pthread_cond_timedwait_relative_old(pthread_cond_t *cond,
   if (reltime.tv_sec < 0)
     return ETIMEDOUT;
 
+#ifndef NANOSLEEP_WORKS
+  retsleep = 0;
+  already_canceled = 0;
+  was_signalled = 0;
+#endif
+
   /* Set up extrication interface */
   extr.pu_object = cond;
   extr.pu_extricate_func = cond_extricate_func;
@@ -186,14 +202,22 @@ pthread_cond_timedwait_relative_old(pthread_cond_t *cond,
       sigemptyset(&unblock);
       sigaddset(&unblock, __pthread_sig_restart);
       sigprocmask(SIG_UNBLOCK, &unblock, &initial_mask);
+#ifdef NANOSLEEP_WORKS
       /* Sleep for the required duration. If woken by a signal, resume waiting
 	 as required by Single Unix Specification.  */
       while (__libc_nanosleep(&reltime, &reltime) != 0)
 	;
+#else
+      /* Sleep for the required duration */
+      retsleep = __libc_nanosleep(&reltime, NULL);
+#endif
       /* Block the restart signal again */
       sigprocmask(SIG_SETMASK, &initial_mask, NULL);
       was_signalled = 0;
     } else {
+#ifndef NANOSLEEP_WORKS
+      retsleep = -1;
+#endif
       was_signalled = 1;
     }
     THREAD_SETMEM(self, p_signal_jmp, NULL);
@@ -225,7 +249,15 @@ pthread_cond_timedwait_relative_old(pthread_cond_t *cond,
       if (was_on_queue) {
 	__pthread_set_own_extricate_if(self, 0);
 	pthread_mutex_lock(mutex);
+#ifdef NANOSLEEP_WORKS
 	return ETIMEDOUT;
+#else
+	if (retsleep == 0)
+	  return ETIMEDOUT;
+	/* Woken by a signal: resume waiting as required by Single Unix
+	   Specification.  */
+	goto requeue_and_wait_again;
+#endif
       }
 
       suspend(self);
@@ -258,13 +290,23 @@ pthread_cond_timedwait_relative_new(pthread_cond_t *cond,
 {
   volatile pthread_descr self = thread_self();
   sigset_t unblock, initial_mask;
+#ifdef NANOSLEEP_WORKS
   int already_canceled = 0;
   int was_signalled = 0;
+#else
+  int retsleep;
+  int already_canceled;
+  int was_signalled;
+#endif
   sigjmp_buf jmpbuf;
   pthread_extricate_if extr;
   struct timeval now;
   struct timespec reltime;
 
+#ifndef NANOSLEEP_WORKS
+ requeue_and_wait_again:
+#endif
+
   /* Compute a time offset relative to now.  */
   __gettimeofday (&now, NULL);
   reltime.tv_nsec = abstime->tv_nsec - now.tv_usec * 1000;
@@ -276,8 +318,11 @@ pthread_cond_timedwait_relative_new(pthread_cond_t *cond,
   if (reltime.tv_sec < 0)
     return ETIMEDOUT;
 
+#ifndef NANOSLEEP_WORKS
+  retsleep = 0;
   already_canceled = 0;
   was_signalled = 0;
+#endif
 
   /* Set up extrication interface */
   extr.pu_object = cond;
@@ -312,14 +357,22 @@ pthread_cond_timedwait_relative_new(pthread_cond_t *cond,
     sigemptyset(&unblock);
     sigaddset(&unblock, __pthread_sig_restart);
     sigprocmask(SIG_UNBLOCK, &unblock, &initial_mask);
+#ifdef NANOSLEEP_WORKS
     /* Sleep for the required duration. If woken by a signal, resume waiting
        as required by Single Unix Specification.  */
     while (__libc_nanosleep(&reltime, &reltime) != 0)
       ;
+#else
+    /* Sleep for the required duration */
+    retsleep = __libc_nanosleep(&reltime, NULL);
+#endif
     /* Block the restart signal again */
     sigprocmask(SIG_SETMASK, &initial_mask, NULL);
     was_signalled = 0;
   } else {
+#ifndef NANOSLEEP_WORKS
+    retsleep = -1;
+#endif
     was_signalled = 1;
   }
   THREAD_SETMEM(self, p_signal_jmp, NULL);
@@ -348,7 +401,15 @@ pthread_cond_timedwait_relative_new(pthread_cond_t *cond,
     if (was_on_queue) {
       __pthread_set_own_extricate_if(self, 0);
       pthread_mutex_lock(mutex);
+#ifdef NANOSLEEP_WORKS
       return ETIMEDOUT;
+#else
+      if (retsleep == 0)
+	return ETIMEDOUT;
+      /* Woken by a signal: resume waiting as required by Single Unix
+	 Specification.  */
+      goto requeue_and_wait_again;
+#endif
     }
 
     /* Eat the outstanding restart() from the signaller */
-- 
2.47.2