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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TraceEvent_h
#define TraceEvent_h
#include "PlatformBridge.h"
// Implementation detail: trace event macros create temporary variables
// to keep instrumentation overhead low. These macros give each temporary
// variable a unique name based on the line number to prevent name collissions.
#define TRACE_EVENT_MAKE_UNIQUE_IDENTIFIER3(a, b) a##b
#define TRACE_EVENT_MAKE_UNIQUE_IDENTIFIER2(a, b) TRACE_EVENT_MAKE_UNIQUE_IDENTIFIER3(a, b)
#define TRACE_EVENT_MAKE_UNIQUE_IDENTIFIER(name_prefix) TRACE_EVENT_MAKE_UNIQUE_IDENTIFIER2(name_prefix, __LINE__)
// Issues PlatformBridge::traceEventBegin and traceEventEnd calls for the enclosing scope
#define TRACE_EVENT(name, id, extra) WebCore::internal::ScopeTracer TRACE_EVENT_MAKE_UNIQUE_IDENTIFIER(__traceEventScope)(name, id, extra);
namespace WebCore {
namespace internal {
// Used by TRACE_EVENT macro. Do not use directly.
class ScopeTracer {
public:
ScopeTracer(const char* name, void*, const char* extra);
~ScopeTracer();
private:
const char* m_name;
void* m_id;
OwnPtr<char*> m_extra;
};
inline ScopeTracer::ScopeTracer(const char* name, void* id, const char* extra)
: m_name(name)
, m_id(id)
{
PlatformBridge::traceEventBegin(name, id, extra); \
if (extra)
m_extra = adoptPtr(strdup(extra));
}
inline ScopeTracer::~ScopeTracer()
{
PlatformBridge::traceEventEnd(m_name, m_id, m_extra.get());
}
} // namespace internal
} // namespace WebCore
#endif
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