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Unified Diff: tools/timer/SysTimer_posix.cpp

Issue 1417753003: Revert of SkTime::GetNSecs() (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 5 years, 2 months ago
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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);
+}
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