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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | |
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. | |
4 | |
5 #ifndef VM_LOG_H_ | |
6 #define VM_LOG_H_ | |
7 | |
8 #include "vm/allocation.h" | |
9 #include "vm/growable_array.h" | |
10 #include "vm/os.h" | |
11 | |
12 namespace dart { | |
13 | |
14 class Isolate; | |
15 class LogBlock; | |
16 class Thread; | |
17 | |
18 #define ISO_Print(format, ...) \ | |
19 Isolate::Current()->Log()->Print(format, ##__VA_ARGS__) | |
srdjan
2015/02/09 18:34:17
When reading ISO_Print, I think of a standardized
Cutch
2015/02/09 18:51:20
Done.
| |
20 | |
21 typedef void (*LogPrinter)(const char* str, ...); | |
22 | |
23 class Log { | |
24 public: | |
25 explicit Log(LogPrinter printer = OS::Print); | |
26 | |
27 // Append a formatted string to the log. | |
28 void Print(const char* format, ...) PRINTF_ATTRIBUTE(2, 3); | |
29 | |
30 // Flush and truncate the log. The log is flushed starting at cursor | |
31 // and truncated to cursor afterwards. | |
32 void Flush(const intptr_t cursor = 0); | |
33 | |
34 // Clears the log. | |
35 void Clear(); | |
36 | |
37 // Current cursor. | |
38 intptr_t cursor() const; | |
39 | |
40 // A logger that does nothing. | |
41 static Log* NoOpLog(); | |
42 | |
43 private: | |
44 void TerminateString(); | |
45 void EnableManualFlush(); | |
46 void DisableManualFlush(); | |
47 | |
48 static Log noop_log_; | |
49 LogPrinter printer_; | |
50 intptr_t manual_flush_; | |
51 MallocGrowableArray<char> buffer_; | |
52 | |
53 friend class LogBlock; | |
54 friend class LogTestHelper; | |
55 DISALLOW_COPY_AND_ASSIGN(Log); | |
56 }; | |
57 | |
58 | |
59 class LogBlock : public StackResource { | |
srdjan
2015/02/09 18:34:17
Please add a brief comment.
Cutch
2015/02/09 18:51:20
Done.
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60 public: | |
61 LogBlock(Isolate* isolate, Log* log) | |
62 : StackResource(isolate), | |
63 log_(log), cursor_(log->cursor()) { | |
64 CommonConstructor(); | |
65 } | |
66 | |
67 explicit LogBlock(Isolate* isolate); | |
68 explicit LogBlock(Thread* thread); | |
69 | |
70 LogBlock(Thread* thread, Log* log); | |
71 | |
72 ~LogBlock() { | |
73 CommonDestructor(); | |
74 } | |
75 | |
76 private: | |
77 void CommonConstructor() { | |
78 log_->EnableManualFlush(); | |
79 } | |
80 | |
81 void CommonDestructor() { | |
82 log_->Flush(cursor_); | |
83 log_->DisableManualFlush(); | |
84 } | |
85 Log* log_; | |
86 intptr_t cursor_; | |
srdjan
2015/02/09 18:34:17
const ?
Cutch
2015/02/09 18:51:20
Done.
| |
87 }; | |
88 | |
89 } // namespace dart | |
90 | |
91 #endif // VM_LOG_H_ | |
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