diff options
Diffstat (limited to 'tools/timer/SysTimer_posix.cpp')
-rw-r--r-- | tools/timer/SysTimer_posix.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/tools/timer/SysTimer_posix.cpp b/tools/timer/SysTimer_posix.cpp new file mode 100644 index 0000000000..4b7d708aab --- /dev/null +++ b/tools/timer/SysTimer_posix.cpp @@ -0,0 +1,51 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "SysTimer_posix.h" + +static double interval_in_ms(timespec start_clock, timespec end_clock) +{ + double duration_clock; + if ((end_clock.tv_nsec - start_clock.tv_nsec) < 0) { + duration_clock = (end_clock.tv_sec - start_clock.tv_sec - 1) * 1000; + duration_clock += (1000000000 + end_clock.tv_nsec - start_clock.tv_nsec) / 1000000.0; + } else { + duration_clock = (end_clock.tv_sec - start_clock.tv_sec) * 1000; + duration_clock += (end_clock.tv_nsec - start_clock.tv_nsec) / 1000000.0; + } + return duration_clock; +} + +void SysTimer::startWall() { + if (-1 == clock_gettime(CLOCK_MONOTONIC, &fWall)) { + timespec none = {0, 0}; + fWall = none; + } +} +void SysTimer::startCpu() { + if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &fCpu)) { + timespec none = {0, 0}; + fCpu = none; + } +} + +double SysTimer::endCpu() { + timespec end_cpu; + if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end_cpu)) { + timespec none = {0, 0}; + end_cpu = none; + } + return interval_in_ms(fCpu, end_cpu); +} + +double SysTimer::endWall() { + timespec end_wall; + if (-1 == clock_gettime(CLOCK_MONOTONIC, &end_wall)) { + timespec none = {0, 0}; + end_wall = none; + } + return interval_in_ms(fWall, end_wall); +} |