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[glibc/history.git] / rt / clock_getcpuclockid.c
blob39c7e55f66627f38d41ef1f584e73fa29fbcce83
1 /* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <errno.h>
20 #include <time.h>
21 #include <unistd.h>
23 int
24 clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
26 /* We don't allow any process ID but our own. */
27 if (pid != 0 && pid != getpid ())
28 return EPERM;
30 #ifdef CLOCK_PROCESS_CPUTIME_ID
31 /* Store the number. */
32 *clock_id = CLOCK_PROCESS_CPUTIME_ID;
34 return 0;
35 #else
36 /* We don't have a timer for that. */
37 return ENOENT;
38 #endif