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authorUlrich Drepper <drepper@redhat.com>2003-06-25 00:00:50 +0000
committerUlrich Drepper <drepper@redhat.com>2003-06-25 00:00:50 +0000
commit4165d44d7026bb2572d4cdfe27f8fec348b4089a (patch)
tree911aa068d7d9c4205ad6a4965ce156c937fed219 /nptl/pthread_clock_settime.c
parent51d1ca00fd1ddc2ed77b615b7a23ecdf3e8a55a9 (diff)
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Update.
	* include/time.h: Define CLOCK_IDFIELD_SIZE.
	* sysdeps/posix/clock_getres.c: Recognize thread CPU clock IDs.
	* sysdeps/unix/clock_gettime.c: Likewise.
	* sysdeps/unix/clock_settime.c: Likewise.
	* sysdeps/unix/clock_nanosleep.c (CPUCLOCK_P): Adjust for new
	clock id for thread CPU clocks.
Diffstat (limited to 'nptl/pthread_clock_settime.c')
-rw-r--r--nptl/pthread_clock_settime.c32
1 files changed, 28 insertions, 4 deletions
diff --git a/nptl/pthread_clock_settime.c b/nptl/pthread_clock_settime.c
index ef6dc18773..61002a8f74 100644
--- a/nptl/pthread_clock_settime.c
+++ b/nptl/pthread_clock_settime.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 2001, 2002, 2003 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
@@ -16,6 +16,7 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include <errno.h>
 #include <stdlib.h>
 #include <time.h>
 #include <libc-internal.h>
@@ -23,10 +24,33 @@
 
 
 #if HP_TIMING_AVAIL
-void
-__pthread_clock_settime (hp_timing_t offset)
+int
+__pthread_clock_settime (clockid_t clock_id, hp_timing_t offset)
 {
+  /* This is the ID of the thread we are looking for.  */
+  pid_t tid = ((unsigned int) clock_id) >> CLOCK_IDFIELD_SIZE;
+
   /* Compute the offset since the start time of the process.  */
-  THREAD_SETMEM (THREAD_SELF, cpuclock_offset, offset);
+  if (tid == 0 || tid == THREAD_GETMEM (THREAD_SELF, tid))
+    /* Our own clock.  */
+    THREAD_SETMEM (THREAD_SELF, cpuclock_offset, offset);
+  else
+    {
+      /* This is more complicated.  We have to locate the thread based
+	 on the ID.  This means walking the list of existing
+	 threads.  */
+      struct pthread *thread = __find_thread_by_id (tid);
+      if (thread == NULL)
+	{
+	  __set_errno (EINVAL);
+	  return -1;
+	}
+
+      /* There is a race here.  The thread might terminate and the stack
+	 become unusable.  But this is the user's problem.  */
+      thread->cpuclock_offset = offset;
+    }
+
+  return 0;
 }
 #endif