| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 2001, 2004 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 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 License as |
| 6 | published by the Free Software Foundation; either version 2.1 of the |
| 7 | License, or (at your option) any later version. |
| 8 | |
| 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. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If not, |
| 16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 17 | Boston, MA 02111-1307, USA. */ |
| 18 | |
| 19 | #include <errno.h> |
| 20 | #include <time.h> |
| 21 | #include <libc-internal.h> |
| 22 | #include "internals.h" |
| 23 | #include "spinlock.h" |
| 24 | |
| 25 | |
| 26 | #if HP_TIMING_AVAIL |
| 27 | int |
| 28 | __pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq, |
| 29 | struct timespec *tp) |
| 30 | { |
| 31 | hp_timing_t tsc, cpuclock_offset; |
| 32 | pthread_descr self = thread_self (); |
| 33 | pthread_t thread = ((unsigned int) clock_id) >> CLOCK_IDFIELD_SIZE; |
| 34 | const unsigned int mask = ~0U >> CLOCK_IDFIELD_SIZE; |
| 35 | |
| 36 | if (thread == 0 || (THREAD_GETMEM (self, p_tid) & mask) == thread) |
| 37 | cpuclock_offset = THREAD_GETMEM (self, p_cpuclock_offset); |
| 38 | else |
| 39 | { |
| 40 | pthread_descr th; |
| 41 | pthread_handle handle = thread_handle (thread); |
| 42 | __pthread_lock (&handle->h_lock, NULL); |
| 43 | th = handle->h_descr; |
| 44 | if (th == NULL || (th->p_tid & mask) != thread || th->p_terminated) |
| 45 | { |
| 46 | __pthread_unlock (&handle->h_lock); |
| 47 | __set_errno (EINVAL); |
| 48 | return -1; |
| 49 | } |
| 50 | cpuclock_offset = th->p_cpuclock_offset; |
| 51 | __pthread_unlock (&handle->h_lock); |
| 52 | } |
| 53 | |
| 54 | /* Get the current counter. */ |
| 55 | HP_TIMING_NOW (tsc); |
| 56 | |
| 57 | /* Compute the offset since the start time of the process. */ |
| 58 | tsc -= cpuclock_offset; |
| 59 | |
| 60 | /* Compute the seconds. */ |
| 61 | tp->tv_sec = tsc / freq; |
| 62 | |
| 63 | /* And the nanoseconds. This computation should be stable until |
| 64 | we get machines with about 16GHz frequency. */ |
| 65 | tp->tv_nsec = ((tsc % freq) * 1000000000ull) / freq; |
| 66 | |
| 67 | return 0; |
| 68 | } |
| 69 | #endif |