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author | Waldemar Brodkorb <wbx@openadk.org> | 2015-02-14 23:04:02 -0600 |
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committer | Waldemar Brodkorb <wbx@openadk.org> | 2015-02-14 23:04:02 -0600 |
commit | e1e46622ac0fce73d802fa4a8a2e83cc25cd9e7a (patch) | |
tree | 2c8d14e4dcc733f4227f0984ed05da5826b13acd /libpthread/linuxthreads/ptclock_gettime.c | |
parent | 6b6ede3d15f04fe825cfa9f697507457e3640344 (diff) |
Revert "resolve merge"
This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.
Diffstat (limited to 'libpthread/linuxthreads/ptclock_gettime.c')
-rw-r--r-- | libpthread/linuxthreads/ptclock_gettime.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/ptclock_gettime.c b/libpthread/linuxthreads/ptclock_gettime.c new file mode 100644 index 000000000..dc28d0c68 --- /dev/null +++ b/libpthread/linuxthreads/ptclock_gettime.c @@ -0,0 +1,67 @@ +/* Copyright (C) 2001, 2004 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, see <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <time.h> +#include "internals.h" +#include "spinlock.h" + + +#if HP_TIMING_AVAIL +int +__pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq, + struct timespec *tp) +{ + hp_timing_t tsc, cpuclock_offset; + pthread_descr self = thread_self (); + pthread_t thread = ((unsigned int) clock_id) >> CLOCK_IDFIELD_SIZE; + const unsigned int mask = ~0U >> CLOCK_IDFIELD_SIZE; + + if (thread == 0 || (THREAD_GETMEM (self, p_tid) & mask) == thread) + cpuclock_offset = THREAD_GETMEM (self, p_cpuclock_offset); + else + { + pthread_descr th; + pthread_handle handle = thread_handle (thread); + __pthread_lock (&handle->h_lock, NULL); + th = handle->h_descr; + if (th == NULL || (th->p_tid & mask) != thread || th->p_terminated) + { + __pthread_unlock (&handle->h_lock); + __set_errno (EINVAL); + return -1; + } + cpuclock_offset = th->p_cpuclock_offset; + __pthread_unlock (&handle->h_lock); + } + + /* Get the current counter. */ + HP_TIMING_NOW (tsc); + + /* Compute the offset since the start time of the process. */ + tsc -= cpuclock_offset; + + /* Compute the seconds. */ + tp->tv_sec = tsc / freq; + + /* And the nanoseconds. This computation should be stable until + we get machines with about 16GHz frequency. */ + tp->tv_nsec = ((tsc % freq) * 1000000000ull) / freq; + + return 0; +} +#endif |