Index: util/misc/clock_win.cc |
diff --git a/util/misc/clock_win.cc b/util/misc/clock_win.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..b746c468145b7c3b62ea7a8e4bf842db2066ae5a |
--- /dev/null |
+++ b/util/misc/clock_win.cc |
@@ -0,0 +1,56 @@ |
+// Copyright 2014 The Crashpad Authors. All rights reserved. |
+// |
+// Licensed under the Apache License, Version 2.0 (the "License"); |
+// you may not use this file except in compliance with the License. |
+// You may obtain a copy of the License at |
+// |
+// http://www.apache.org/licenses/LICENSE-2.0 |
+// |
+// Unless required by applicable law or agreed to in writing, software |
+// distributed under the License is distributed on an "AS IS" BASIS, |
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
+// See the License for the specific language governing permissions and |
+// limitations under the License. |
+ |
+#include "util/misc/clock.h" |
+ |
+#include <sys/types.h> |
+#include <windows.h> |
+ |
+namespace { |
+ |
+LARGE_INTEGER QpcFrequencyInternal() { |
+ LARGE_INTEGER frequency; |
+ QueryPerformanceFrequency(&frequency); |
+ return frequency; |
+} |
+ |
+int64_t QpcFrequency() { |
+ static LARGE_INTEGER frequency = QpcFrequencyInternal(); |
+ return frequency.QuadPart; |
+} |
+ |
+} // namespace |
+ |
+namespace crashpad { |
+ |
+uint64_t ClockMonotonicNanoseconds() { |
+ LARGE_INTEGER time; |
+ QueryPerformanceCounter(&time); |
+ int64_t frequency = QpcFrequency(); |
+ int64_t whole_seconds = time.QuadPart / frequency; |
+ int64_t leftover_ticks = time.QuadPart / (whole_seconds * frequency); |
+ const int64_t kNanosecondsPerSecond = static_cast<const int64_t>(1E9); |
+ return (whole_seconds * kNanosecondsPerSecond) + |
+ ((leftover_ticks * kNanosecondsPerSecond) / frequency); |
+} |
+ |
+void SleepNanoseconds(uint64_t nanoseconds) { |
+ // This is both inaccurate (will be way too long for short sleeps) and |
+ // incorrect (can sleep for less than requested). But it's what's available |
+ // without implementing a busy loop. |
Mark Mentovai
2014/12/17 01:12:23
Probably should do the loop until ClockMonotonicNa
scottmg
2014/12/17 01:58:11
Done. I look forward to deleting it!
|
+ const uint64_t kNanosecondsPerMillisecond = static_cast<const uint64_t>(1E6); |
+ Sleep(static_cast<DWORD>(nanoseconds / kNanosecondsPerMillisecond)); |
+} |
+ |
+} // namespace crashpad |