win: clock implementation

util/misc/clock.cc

-// 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 <time.h>
-
-#include "base/logging.h"
-#include "base/posix/eintr_wrapper.h"
-#include "build/build_config.h"
-
-namespace {
-
-const uint64_t kNanosecondsPerSecond = 1E9;
-
-}  // namespace
-
-namespace crashpad {
-
-#if !defined(OS_MACOSX)
-
-uint64_t ClockMonotonicNanoseconds() {
-  timespec now;
-  int rv = clock_gettime(CLOCK_MONOTONIC, &now);
-  DPCHECK(rv == 0) << "clock_gettime";
-
-  return now.tv_sec * kNanosecondsPerSecond + now.tv_nsec;
-}
-
-#endif
-
-void SleepNanoseconds(uint64_t nanoseconds) {
-  timespec sleep_time;
-  sleep_time.tv_sec = nanoseconds / kNanosecondsPerSecond;
-  sleep_time.tv_nsec = nanoseconds % kNanosecondsPerSecond;
-  int rv = HANDLE_EINTR(nanosleep(&sleep_time, &sleep_time));
-  DPCHECK(rv == 0) << "nanosleep";
-}
-
-}  // namespace crashpad