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Unified Diff: tools/timer/SysTimer_mach.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_mach.cpp
diff --git a/tools/timer/SysTimer_mach.cpp b/tools/timer/SysTimer_mach.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..aca12dee5203afb2109aa47d6d7b8a23c183e129
--- /dev/null
+++ b/tools/timer/SysTimer_mach.cpp
@@ -0,0 +1,66 @@
+/*
+ * 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_mach.h"
+
+static time_value_t mac_cpu_time() {
+ mach_port_t task = mach_task_self();
+ if (task == MACH_PORT_NULL) {
+ time_value_t none = {0, 0};
+ return none;
+ }
+
+ task_thread_times_info thread_info_data;
+ mach_msg_type_number_t thread_info_count = TASK_THREAD_TIMES_INFO_COUNT;
+ if (KERN_SUCCESS != task_info(task,
+ TASK_THREAD_TIMES_INFO,
+ reinterpret_cast<task_info_t>(&thread_info_data),
+ &thread_info_count)) {
+ time_value_t none = {0, 0};
+ return none;
+ }
+
+ time_value_add(&thread_info_data.user_time, &thread_info_data.system_time)
+ return thread_info_data.user_time;
+}
+
+static double interval_in_ms(time_value_t start_clock, time_value_t end_clock) {
+ double duration_clock;
+ if ((end_clock.microseconds - start_clock.microseconds) < 0) {
+ duration_clock = (end_clock.seconds - start_clock.seconds-1) * 1000;
+ duration_clock += (1000000 + end_clock.microseconds - start_clock.microseconds) / 1000.0;
+ } else {
+ duration_clock = (end_clock.seconds - start_clock.seconds) * 1000;
+ duration_clock += (end_clock.microseconds - start_clock.microseconds) / 1000.0;
+ }
+ return duration_clock;
+}
+
+void SysTimer::startWall() {
+ fStartWall = mach_absolute_time();
+}
+
+void SysTimer::startCpu() {
+ fStartCpu = mac_cpu_time();
+}
+
+double SysTimer::endCpu() {
+ time_value_t end_cpu = mac_cpu_time();
+ return interval_in_ms(fStartCpu, end_cpu);
+}
+
+double SysTimer::endWall() {
+ uint64_t end_wall = mach_absolute_time();
+
+ uint64_t elapsed = end_wall - fStartWall;
+ mach_timebase_info_data_t sTimebaseInfo;
+ if (KERN_SUCCESS != mach_timebase_info(&sTimebaseInfo)) {
+ return 0;
+ } else {
+ uint64_t elapsedNano = elapsed * sTimebaseInfo.numer / sTimebaseInfo.denom;
+ return elapsedNano / 1000000.0;
+ }
+}
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