initial import of latest linuxthreads

1 files changed, 137 insertions, 0 deletions

diff --git a/libpthread/linuxthreads/sysdeps/pthread/timer_settime.c b/libpthread/linuxthreads/sysdeps/pthread/timer_settime.c
new file mode 100644
index 000000000..592b5271b
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/pthread/timer_settime.c
@@ -0,0 +1,137 @@
+/* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Kaz Kylheku <kaz@ashi.footprints.net>.
+
+   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; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <time.h>
+
+#include "posix-timer.h"
+
+
+/* Set timer TIMERID to VALUE, returning old value in OVLAUE.  */
+int
+timer_settime (timerid, flags, value, ovalue)
+     timer_t timerid;
+     int flags;
+     const struct itimerspec *value;
+     struct itimerspec *ovalue;
+{
+  struct timer_node *timer;
+  struct thread_node *thread = NULL;
+  struct timespec now;
+  int have_now = 0, need_wakeup = 0;
+  int retval = -1;
+
+  timer = timer_id2ptr (timerid);
+  if (timer == NULL)
+    {
+      __set_errno (EINVAL);
+      goto bail;
+    }
+
+  if (value->it_interval.tv_nsec < 0
+      || value->it_interval.tv_nsec >= 1000000000
+      || value->it_value.tv_nsec < 0
+      || value->it_value.tv_nsec >= 1000000000)
+    {
+      __set_errno (EINVAL);
+      goto bail;
+    }
+
+  /* Will need to know current time since this is a relative timer;
+     might as well make the system call outside of the lock now! */
+
+  if ((flags & TIMER_ABSTIME) == 0)
+    {
+      clock_gettime (timer->clock, &now);
+      have_now = 1;
+    }
+
+  pthread_mutex_lock (&__timer_mutex);
+  timer_addref (timer);
+
+  /* One final check of timer validity; this one is possible only
+     until we have the mutex, because it accesses the inuse flag. */
+
+  if (! timer_valid(timer))
+    {
+      __set_errno (EINVAL);
+      goto unlock_bail;
+    }
+
+  if (ovalue != NULL)
+    {
+      ovalue->it_interval = timer->value.it_interval;
+
+      if (timer->armed)
+	{
+	  if (! have_now)
+	    {
+	      pthread_mutex_unlock (&__timer_mutex);
+	      clock_gettime (timer->clock, &now);
+	      have_now = 1;
+	      pthread_mutex_lock (&__timer_mutex);
+	      timer_addref (timer);
+	    }
+
+	  timespec_sub (&ovalue->it_value, &timer->expirytime, &now);
+	}
+      else
+	{
+	  ovalue->it_value.tv_sec = 0;
+	  ovalue->it_value.tv_nsec = 0;
+	}
+    }
+
+  timer->value = *value;
+
+  list_unlink_ip (&timer->links);
+  timer->armed = 0;
+
+  thread = timer->thread;
+
+  /* A value of { 0, 0 } causes the timer to be stopped. */
+  if (value->it_value.tv_sec != 0
+      || __builtin_expect (value->it_value.tv_nsec != 0, 1))
+    {
+      if ((flags & TIMER_ABSTIME) != 0)
+	/* The user specified the expiration time.  */
+	timer->expirytime = value->it_value;
+      else
+	timespec_add (&timer->expirytime, &now, &value->it_value);
+
+      /* Only need to wake up the thread if timer is inserted
+	 at the head of the queue. */
+      if (thread != NULL)
+	need_wakeup = __timer_thread_queue_timer (thread, timer);
+      timer->armed = 1;
+    }
+
+  retval = 0;
+
+unlock_bail:
+  timer_delref (timer);
+  pthread_mutex_unlock (&__timer_mutex);
+
+bail:
+  if (thread != NULL && need_wakeup)
+    __timer_thread_wakeup (thread);
+
+  return retval;
+}