johnmccutchan@google.com
fdaf1b59bf
Review URL: https://codereview.chromium.org//243583008 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@35208 260f80e4-7a28-3924-810f-c04153c831b5
62 lines
1.4 KiB
C++
62 lines
1.4 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_TRACE_BUFFER_H_
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#define VM_TRACE_BUFFER_H_
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#include "platform/assert.h"
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#include "platform/globals.h"
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#include "vm/json_stream.h"
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namespace dart {
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class JSONStream;
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struct TraceBufferEntry {
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int64_t micros;
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char* message;
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bool empty() const {
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return message == NULL;
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}
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};
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class TraceBuffer {
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public:
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static const intptr_t kDefaultCapacity = 1024;
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explicit TraceBuffer(intptr_t capacity = kDefaultCapacity);
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~TraceBuffer();
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void Clear();
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// Internally message is copied.
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void Trace(int64_t micros, const char* message);
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// Internally message is copied.
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void Trace(const char* message);
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void TraceF(const char* format, ...) PRINTF_ATTRIBUTE(2, 3);
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void PrintToJSONStream(JSONStream* stream) const;
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private:
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void Init();
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void Cleanup();
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void Fill(TraceBufferEntry* entry, int64_t micros, char* msg);
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void AppendTrace(int64_t micros, char* message);
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TraceBufferEntry* ring_;
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const intptr_t ring_capacity_;
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intptr_t ring_cursor_;
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intptr_t RingIndex(intptr_t i) const {
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return i % ring_capacity_;
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}
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DISALLOW_COPY_AND_ASSIGN(TraceBuffer);
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};
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} // namespace dart
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#endif // VM_TRACE_BUFFER_H_
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