| 1 | /* |
| 2 | * Copyright (C) 2010 Pierre-Marc Fournier |
| 3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 4 | * |
| 5 | * This library is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU Lesser General Public |
| 7 | * License as published by the Free Software Foundation; version 2.1 of |
| 8 | * the License. |
| 9 | * |
| 10 | * This library is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * Lesser General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Lesser General Public |
| 16 | * License along with this library; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | #ifndef _UST_CLOCK_H |
| 21 | #define _UST_CLOCK_H |
| 22 | |
| 23 | #include <time.h> |
| 24 | #include <sys/time.h> |
| 25 | #include <stdint.h> |
| 26 | #include <stddef.h> |
| 27 | #include <ust/core.h> |
| 28 | |
| 29 | /* TRACE CLOCK */ |
| 30 | |
| 31 | /* |
| 32 | * Currently using the kernel MONOTONIC clock, waiting for kernel-side |
| 33 | * LTTng to implement mmap'd trace clock. |
| 34 | */ |
| 35 | |
| 36 | /* Choosing correct trace clock */ |
| 37 | |
| 38 | static __inline__ uint64_t trace_clock_read64(void) |
| 39 | { |
| 40 | struct timespec ts; |
| 41 | uint64_t retval; |
| 42 | |
| 43 | clock_gettime(CLOCK_MONOTONIC, &ts); |
| 44 | retval = ts.tv_sec; |
| 45 | retval *= 1000000000; |
| 46 | retval += ts.tv_nsec; |
| 47 | |
| 48 | return retval; |
| 49 | } |
| 50 | |
| 51 | #if __i386__ || __x86_64__ |
| 52 | static __inline__ uint64_t trace_clock_frequency(void) |
| 53 | { |
| 54 | return 1000000000LL; |
| 55 | } |
| 56 | #endif /* #else #if __i386__ || __x86_64__ */ |
| 57 | |
| 58 | static __inline__ uint32_t trace_clock_freq_scale(void) |
| 59 | { |
| 60 | return 1; |
| 61 | } |
| 62 | |
| 63 | #endif /* _UST_CLOCK_H */ |