diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/clock_getres.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/clock_getres.c | 88 |
1 files changed, 12 insertions, 76 deletions
diff --git a/sysdeps/unix/sysv/linux/clock_getres.c b/sysdeps/unix/sysv/linux/clock_getres.c index e7e3138543..2bada33b40 100644 --- a/sysdeps/unix/sysv/linux/clock_getres.c +++ b/sysdeps/unix/sysv/linux/clock_getres.c @@ -1,5 +1,5 @@ /* clock_getres -- Get the resolution of a POSIX clockid_t. Linux version. - Copyright (C) 2003,2004,2005,2006,2008,2010 Free Software Foundation, Inc. + Copyright (C) 2003-2012 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 @@ -35,11 +35,9 @@ retval = INLINE_VSYSCALL (clock_getres, 2, clock_id, res); \ break -#ifdef __ASSUME_POSIX_TIMERS - -/* This means the REALTIME and MONOTONIC clock are definitely - supported in the kernel. */ -# define SYSDEP_GETRES \ +/* The REALTIME and MONOTONIC clock are definitely supported in the + kernel. */ +#define SYSDEP_GETRES \ SYSDEP_GETRES_CPUTIME \ case CLOCK_REALTIME: \ case CLOCK_MONOTONIC: \ @@ -48,57 +46,6 @@ case CLOCK_MONOTONIC_COARSE: \ SYSCALL_GETRES -# define __libc_missing_posix_timers 0 -#elif defined __NR_clock_getres -/* Is the syscall known to exist? */ -extern int __libc_missing_posix_timers attribute_hidden; - -static inline int -maybe_syscall_getres (clockid_t clock_id, struct timespec *res) -{ - int e = EINVAL; - - if (!__libc_missing_posix_timers) - { - INTERNAL_SYSCALL_DECL (err); - int r = INTERNAL_VSYSCALL (clock_getres, err, 2, clock_id, res); - if (!INTERNAL_SYSCALL_ERROR_P (r, err)) - return 0; - - e = INTERNAL_SYSCALL_ERRNO (r, err); - if (e == ENOSYS) - { - __libc_missing_posix_timers = 1; - e = EINVAL; - } - } - - return e; -} - -/* The REALTIME and MONOTONIC clock might be available. Try the - syscall first. */ -# define SYSDEP_GETRES \ - SYSDEP_GETRES_CPUTIME \ - case CLOCK_REALTIME: \ - case CLOCK_MONOTONIC: \ - case CLOCK_MONOTONIC_RAW: \ - case CLOCK_REALTIME_COARSE: \ - case CLOCK_MONOTONIC_COARSE: \ - retval = maybe_syscall_getres (clock_id, res); \ - if (retval == 0) \ - break; \ - /* Fallback code. */ \ - if (retval == EINVAL && clock_id == CLOCK_REALTIME) \ - retval = realtime_getres (res); \ - else \ - { \ - __set_errno (retval); \ - retval = -1; \ - } \ - break; -#endif - #ifdef __NR_clock_getres /* We handled the REALTIME clock here. */ # define HANDLED_REALTIME 1 @@ -126,26 +73,15 @@ maybe_syscall_getres_cpu (clockid_t clock_id, struct timespec *res) return 0; e = INTERNAL_SYSCALL_ERRNO (r, err); -# ifndef __ASSUME_POSIX_TIMERS - if (e == ENOSYS) - { - __libc_missing_posix_timers = 1; - __libc_missing_posix_cpu_timers = 1; - e = EINVAL; - } - else -# endif + if (e == EINVAL) { - if (e == EINVAL) - { - /* Check whether the kernel supports CPU clocks at all. - If not, record it for the future. */ - r = INTERNAL_VSYSCALL (clock_getres, err, 2, - MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED), - NULL); - if (INTERNAL_SYSCALL_ERROR_P (r, err)) - __libc_missing_posix_cpu_timers = 1; - } + /* Check whether the kernel supports CPU clocks at all. + If not, record it for the future. */ + r = INTERNAL_VSYSCALL (clock_getres, err, 2, + MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED), + NULL); + if (INTERNAL_SYSCALL_ERROR_P (r, err)) + __libc_missing_posix_cpu_timers = 1; } } |