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time/clock_getcpuclockid.c
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Paul Eggert
Update copyright dates with scripts/update-copyrights
02 янв 2026, 00:42
02 янв 2026, 00:42
66f3e92
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/* Get a clockid_t for the process CPU clock of a given process. Generic. Copyright (C) 2000-2026 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; if not, see <https://www.gnu.org/licenses/>. */ #include <errno.h> #include <time.h> #include <unistd.h> #include <shlib-compat.h> int __clock_getcpuclockid (pid_t pid, clockid_t *clock_id) { /* We don't allow any process ID but our own. */ if (pid != 0 && pid != getpid ()) return EPERM; #ifdef CLOCK_PROCESS_CPUTIME_ID /* Store the number. */ *clock_id = CLOCK_PROCESS_CPUTIME_ID; return 0; #else /* We don't have a timer for that. */ return ENOENT; #endif } versioned_symbol (libc, __clock_getcpuclockid, clock_getcpuclockid, GLIBC_2_17); /* clock_getcpuclockid moved to libc in version 2.17; old binaries may expect the symbol version it had in librt. */ #if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17) compat_symbol (libc, __clock_getcpuclockid, clock_getcpuclockid, GLIBC_2_2); #endif