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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "base/win/sampling_profiler.h" | 5 #include "base/win/sampling_profiler.h" |
| 6 | 6 |
| 7 #include <winternl.h> // for NTSTATUS. | 7 #include <winternl.h> // for NTSTATUS. |
| 8 | 8 |
| 9 #include "base/lazy_instance.h" | 9 #include "base/lazy_instance.h" |
| 10 | 10 |
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| 97 if (ZwSetIntervalProfile && | 97 if (ZwSetIntervalProfile && |
| 98 ZwQueryIntervalProfile && | 98 ZwQueryIntervalProfile && |
| 99 ZwCreateProfile && | 99 ZwCreateProfile && |
| 100 ZwStartProfile && | 100 ZwStartProfile && |
| 101 ZwStopProfile) { | 101 ZwStopProfile) { |
| 102 initialized_ = true; | 102 initialized_ = true; |
| 103 } | 103 } |
| 104 } | 104 } |
| 105 } | 105 } |
| 106 | 106 |
| 107 base::LazyInstance<ProfilerFuncs, base::LeakyLazyInstanceTraits<ProfilerFuncs>> | 107 base::LazyInstance<ProfilerFuncs, base::LeakyLazyInstanceTraits<ProfilerFuncs> > |
| 108 funcs = LAZY_INSTANCE_INITIALIZER; | 108 funcs = LAZY_INSTANCE_INITIALIZER; |
| 109 | 109 |
| 110 } // namespace | 110 } // namespace |
| 111 | 111 |
| 112 | 112 |
| 113 namespace base { | 113 namespace base { |
| 114 namespace win { | 114 namespace win { |
| 115 | 115 |
| 116 SamplingProfiler::SamplingProfiler() : is_started_(false) { | 116 SamplingProfiler::SamplingProfiler() : is_started_(false) { |
| 117 } | 117 } |
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| 230 return false; | 230 return false; |
| 231 | 231 |
| 232 // According to Nebbet, the sampling interval is in units of 100ns. | 232 // According to Nebbet, the sampling interval is in units of 100ns. |
| 233 *sampling_interval = base::TimeDelta::FromMicroseconds(interval / 10); | 233 *sampling_interval = base::TimeDelta::FromMicroseconds(interval / 10); |
| 234 | 234 |
| 235 return true; | 235 return true; |
| 236 } | 236 } |
| 237 | 237 |
| 238 } // namespace win | 238 } // namespace win |
| 239 } // namespace base | 239 } // namespace base |
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