diff options
Diffstat (limited to 'libpthread/nptl/pthread_clock_settime.c')
| -rw-r--r-- | libpthread/nptl/pthread_clock_settime.c | 56 | 
1 files changed, 56 insertions, 0 deletions
diff --git a/libpthread/nptl/pthread_clock_settime.c b/libpthread/nptl/pthread_clock_settime.c new file mode 100644 index 000000000..61002a8f7 --- /dev/null +++ b/libpthread/nptl/pthread_clock_settime.c @@ -0,0 +1,56 @@ +/* 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 +   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 <stdlib.h> +#include <time.h> +#include <libc-internal.h> +#include "pthreadP.h" + + +#if HP_TIMING_AVAIL +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.  */ +  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  | 
