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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef VM_TRACE_BUFFER_H_ | 5 #ifndef VM_TRACE_BUFFER_H_ |
6 #define VM_TRACE_BUFFER_H_ | 6 #define VM_TRACE_BUFFER_H_ |
7 | 7 |
8 #include "platform/assert.h" | 8 #include "platform/assert.h" |
9 #include "platform/globals.h" | 9 #include "platform/globals.h" |
10 #include "vm/json_stream.h" | 10 #include "vm/json_stream.h" |
11 | 11 |
12 namespace dart { | 12 namespace dart { |
13 | 13 |
14 class JSONObject; | |
15 class JSONStream; | 14 class JSONStream; |
16 | 15 |
17 struct TraceBufferEntry { | 16 struct TraceBufferEntry { |
18 int64_t micros; | 17 int64_t micros; |
19 char* message; | 18 char* message; |
20 bool empty() const { | 19 bool empty() const { |
21 return message == NULL; | 20 return message == NULL; |
22 } | 21 } |
23 }; | 22 }; |
24 | 23 |
25 class TraceBuffer { | 24 class TraceBuffer { |
26 public: | 25 public: |
27 static const intptr_t kInitialCapacity = 16; | 26 static const intptr_t kDefaultCapacity = 1024; |
28 static const intptr_t kMaximumCapacity = 1024; | |
29 | 27 |
30 // TraceBuffer starts with kInitialCapacity and will expand itself until | 28 explicit TraceBuffer(intptr_t capacity = kDefaultCapacity); |
31 // it reaches kMaximumCapacity. | |
32 TraceBuffer(intptr_t initial_capacity = kInitialCapacity, | |
33 intptr_t maximum_capacity = kMaximumCapacity); | |
34 ~TraceBuffer(); | 29 ~TraceBuffer(); |
35 | 30 |
36 void Clear(); | 31 void Clear(); |
37 | 32 |
38 // Internally message is copied. | 33 // Internally message is copied. |
39 void Trace(int64_t micros, const char* message); | 34 void Trace(int64_t micros, const char* message); |
40 // Internally message is copied. | 35 // Internally message is copied. |
41 void Trace(const char* message); | 36 void Trace(const char* message); |
42 void TraceF(const char* format, ...) PRINTF_ATTRIBUTE(2, 3); | 37 void TraceF(const char* format, ...) PRINTF_ATTRIBUTE(2, 3); |
43 | 38 |
44 void PrintToJSONObject(JSONObject* obj) const; | |
45 void PrintToJSONStream(JSONStream* stream) const; | 39 void PrintToJSONStream(JSONStream* stream) const; |
46 | 40 |
47 intptr_t capacity() const { return capacity_; } | |
48 | |
49 private: | 41 private: |
50 void Init(); | 42 void Init(); |
51 void Resize(intptr_t capacity); | |
52 void Cleanup(); | 43 void Cleanup(); |
53 void Fill(TraceBufferEntry* entry, int64_t micros, char* msg); | 44 void Fill(TraceBufferEntry* entry, int64_t micros, char* msg); |
54 void AppendTrace(int64_t micros, char* message); | 45 void AppendTrace(int64_t micros, char* message); |
55 | 46 |
56 TraceBufferEntry* ring_; | 47 TraceBufferEntry* ring_; |
57 intptr_t size_; | 48 const intptr_t ring_capacity_; |
58 intptr_t capacity_; | |
59 intptr_t ring_cursor_; | 49 intptr_t ring_cursor_; |
60 const intptr_t max_capacity_; | |
61 | 50 |
62 intptr_t RingIndex(intptr_t i) const { | 51 intptr_t RingIndex(intptr_t i) const { |
63 return i % capacity_; | 52 return i % ring_capacity_; |
64 } | 53 } |
65 | 54 |
66 DISALLOW_COPY_AND_ASSIGN(TraceBuffer); | 55 DISALLOW_COPY_AND_ASSIGN(TraceBuffer); |
67 }; | 56 }; |
68 | 57 |
69 | 58 |
70 } // namespace dart | 59 } // namespace dart |
71 | 60 |
72 #endif // VM_TRACE_BUFFER_H_ | 61 #endif // VM_TRACE_BUFFER_H_ |
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