Index: tools/timer/SysTimer_posix.cpp |
diff --git a/tools/timer/SysTimer_posix.cpp b/tools/timer/SysTimer_posix.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..4b7d708aab0c4a7e899da8c55ddb409f43845a16 |
--- /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); |
+} |