diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/sysconf.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sysconf.c | 50 |
1 files changed, 30 insertions, 20 deletions
diff --git a/sysdeps/unix/sysv/linux/sysconf.c b/sysdeps/unix/sysv/linux/sysconf.c index 50c5528dd8..e44aa994ee 100644 --- a/sysdeps/unix/sysv/linux/sysconf.c +++ b/sysdeps/unix/sysv/linux/sysconf.c @@ -1,5 +1,5 @@ /* Get file-specific information about a file. Linux version. - Copyright (C) 2003, 2004, 2006, 2008, 2009 Free Software Foundation, Inc. + Copyright (C) 2003,2004,2006 2008,2009,2011 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 @@ -35,6 +35,34 @@ static long int posix_sysconf (int name); +#ifndef HAS_CPUCLOCK +static long int +has_cpuclock (void) +{ +# if defined __NR_clock_getres || HP_TIMING_AVAIL + /* If we have HP_TIMING, we will fall back on that if the system + call does not work, so we support it either way. */ +# if !HP_TIMING_AVAIL + /* Check using the clock_getres system call. */ + struct timespec ts; + INTERNAL_SYSCALL_DECL (err); + int r = INTERNAL_SYSCALL (clock_getres, err, 2, + (name == _SC_CPUTIME + ? CLOCK_PROCESS_CPUTIME_ID + : CLOCK_THREAD_CPUTIME_ID), + &ts); + if (INTERNAL_SYSCALL_ERROR_P (r, err)) + return -1; +# endif + return _POSIX_VERSION; +# else + return -1; +# endif +} +# define HAS_CPUCLOCK() has_cpuclock () +#endif + + /* Get the value of the system variable NAME. */ long int __sysconf (int name) @@ -56,27 +84,9 @@ __sysconf (int name) } #endif -#if defined __NR_clock_getres || HP_TIMING_AVAIL case _SC_CPUTIME: case _SC_THREAD_CPUTIME: - { - /* If we have HP_TIMING, we will fall back on that if the system - call does not work, so we support it either way. */ -# if !HP_TIMING_AVAIL - /* Check using the clock_getres system call. */ - struct timespec ts; - INTERNAL_SYSCALL_DECL (err); - int r = INTERNAL_SYSCALL (clock_getres, err, 2, - (name == _SC_CPUTIME - ? CLOCK_PROCESS_CPUTIME_ID - : CLOCK_THREAD_CPUTIME_ID), - &ts); - if (INTERNAL_SYSCALL_ERROR_P (r, err)) - return -1; -# endif - return _POSIX_VERSION; - } -#endif + return HAS_CPUCLOCK (); case _SC_ARG_MAX: #if __LINUX_KERNEL_VERSION < 0x020617 |