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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 // This header file defines the set of trace_event macros without specifying | 5 // This header file defines the set of trace_event macros without specifying |
6 // how the events actually get collected and stored. If you need to expose trace | 6 // how the events actually get collected and stored. If you need to expose trace |
7 // events to some other universe, you can copy-and-paste this file as well as | 7 // events to some other universe, you can copy-and-paste this file as well as |
8 // trace_event.h, modifying the macros contained there as necessary for the | 8 // trace_event.h, modifying the macros contained there as necessary for the |
9 // target platform. The end result is that multiple libraries can funnel events | 9 // target platform. The end result is that multiple libraries can funnel events |
10 // through to a shared trace event collector. | 10 // through to a shared trace event collector. |
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960 const int kZeroNumArgs = 0; | 960 const int kZeroNumArgs = 0; |
961 const unsigned long long kNoEventId = 0; | 961 const unsigned long long kNoEventId = 0; |
962 | 962 |
963 // TraceID encapsulates an ID that can either be an integer or pointer. Pointers | 963 // TraceID encapsulates an ID that can either be an integer or pointer. Pointers |
964 // are by default mangled with the Process ID so that they are unlikely to | 964 // are by default mangled with the Process ID so that they are unlikely to |
965 // collide when the same pointer is used on different processes. | 965 // collide when the same pointer is used on different processes. |
966 class TraceID { | 966 class TraceID { |
967 public: | 967 public: |
968 class DontMangle { | 968 class DontMangle { |
969 public: | 969 public: |
970 explicit DontMangle(void* id) | 970 explicit DontMangle(const void* id) |
971 : data_(static_cast<unsigned long long>( | 971 : data_(static_cast<unsigned long long>( |
972 reinterpret_cast<unsigned long>(id))) {} | 972 reinterpret_cast<unsigned long>(id))) {} |
973 explicit DontMangle(unsigned long long id) : data_(id) {} | 973 explicit DontMangle(unsigned long long id) : data_(id) {} |
974 explicit DontMangle(unsigned long id) : data_(id) {} | 974 explicit DontMangle(unsigned long id) : data_(id) {} |
975 explicit DontMangle(unsigned int id) : data_(id) {} | 975 explicit DontMangle(unsigned int id) : data_(id) {} |
976 explicit DontMangle(unsigned short id) : data_(id) {} | 976 explicit DontMangle(unsigned short id) : data_(id) {} |
977 explicit DontMangle(unsigned char id) : data_(id) {} | 977 explicit DontMangle(unsigned char id) : data_(id) {} |
978 explicit DontMangle(long long id) | 978 explicit DontMangle(long long id) |
979 : data_(static_cast<unsigned long long>(id)) {} | 979 : data_(static_cast<unsigned long long>(id)) {} |
980 explicit DontMangle(long id) | 980 explicit DontMangle(long id) |
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1541 const char* name_; | 1541 const char* name_; |
1542 IDType id_; | 1542 IDType id_; |
1543 | 1543 |
1544 DISALLOW_COPY_AND_ASSIGN(TraceScopedTrackableObject); | 1544 DISALLOW_COPY_AND_ASSIGN(TraceScopedTrackableObject); |
1545 }; | 1545 }; |
1546 | 1546 |
1547 } // namespace debug | 1547 } // namespace debug |
1548 } // namespace base | 1548 } // namespace base |
1549 | 1549 |
1550 #endif /* BASE_DEBUG_TRACE_EVENT_H_ */ | 1550 #endif /* BASE_DEBUG_TRACE_EVENT_H_ */ |
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