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/*
* Copyright (C) 2013 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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 TraceEventDispatcher_h
#define TraceEventDispatcher_h
#include "platform/TraceEvent.h"
#include "wtf/HashMap.h"
#include "wtf/Threading.h"
#include "wtf/ThreadingPrimitives.h"
#include "wtf/Vector.h"
#include "wtf/text/WTFString.h"
namespace WebCore {
class InspectorClient;
struct TraceEventTargetBase {
virtual ~TraceEventTargetBase() { }
};
template<typename C> struct TraceEventTarget;
class TraceEventDispatcher {
WTF_MAKE_NONCOPYABLE(TraceEventDispatcher);
public:
class TraceEvent {
public:
TraceEvent()
: m_name(0)
, m_argumentCount(0)
{
}
TraceEvent(double timestamp, char phase, const char* name, unsigned long long id, ThreadIdentifier threadIdentifier,
int argumentCount, const char* const* argumentNames, const unsigned char* argumentTypes, const unsigned long long* argumentValues)
: m_timestamp(timestamp)
, m_phase(phase)
, m_name(name)
, m_id(id)
, m_threadIdentifier(threadIdentifier)
, m_argumentCount(argumentCount)
{
if (m_argumentCount > MaxArguments) {
ASSERT_NOT_REACHED();
m_argumentCount = MaxArguments;
}
for (int i = 0; i < m_argumentCount; ++i) {
m_argumentNames[i] = argumentNames[i];
m_argumentTypes[i] = argumentTypes[i];
m_argumentValues[i] = argumentValues[i];
}
}
double timestamp() const { return m_timestamp; }
char phase() const { return m_phase; }
const char* name() const { return m_name; }
unsigned long long id() const { return m_id; }
ThreadIdentifier threadIdentifier() const { return m_threadIdentifier; }
int argumentCount() const { return m_argumentCount; }
bool isNull() const { return !m_name; }
bool asBool(const char* name) const
{
return parameter(name, TRACE_VALUE_TYPE_BOOL).m_bool;
}
long long asInt(const char* name) const
{
size_t index = findParameter(name);
if (index == kNotFound || (m_argumentTypes[index] != TRACE_VALUE_TYPE_INT && m_argumentTypes[index] != TRACE_VALUE_TYPE_UINT)) {
ASSERT_NOT_REACHED();
return 0;
}
return reinterpret_cast<const WebCore::TraceEvent::TraceValueUnion*>(m_argumentValues + index)->m_int;
}
unsigned long long asUInt(const char* name) const
{
return asInt(name);
}
double asDouble(const char* name) const
{
return parameter(name, TRACE_VALUE_TYPE_DOUBLE).m_double;
}
const char* asString(const char* name) const
{
return parameter(name, TRACE_VALUE_TYPE_STRING).m_string;
}
private:
enum { MaxArguments = 2 };
size_t findParameter(const char*) const;
const WebCore::TraceEvent::TraceValueUnion& parameter(const char* name, unsigned char expectedType) const;
double m_timestamp;
char m_phase;
const char* m_name;
unsigned long long m_id;
ThreadIdentifier m_threadIdentifier;
int m_argumentCount;
const char* m_argumentNames[MaxArguments];
unsigned char m_argumentTypes[MaxArguments];
unsigned long long m_argumentValues[MaxArguments];
};
typedef void (TraceEventTargetBase::*TraceEventHandlerMethod)(const TraceEvent&);
static TraceEventDispatcher* instance()
{
DEFINE_STATIC_LOCAL(TraceEventDispatcher, instance, ());
return &instance;
}
template<typename ListenerClass>
void addListener(const char* name, char phase, ListenerClass* instance, typename TraceEventTarget<ListenerClass>::TraceEventHandler handler, InspectorClient* client)
{
innerAddListener(name, phase, instance, static_cast<TraceEventHandlerMethod>(handler), client);
}
void removeAllListeners(TraceEventTargetBase*, InspectorClient*);
void processBackgroundEvents();
private:
struct BoundTraceEventHandler {
TraceEventTargetBase* instance;
TraceEventHandlerMethod method;
BoundTraceEventHandler() : instance(0), method(0) { }
BoundTraceEventHandler(TraceEventTargetBase* instance, TraceEventHandlerMethod method)
: instance(instance)
, method(method)
{
}
};
typedef std::pair<String, int> EventSelector;
typedef HashMap<EventSelector, Vector<BoundTraceEventHandler> > HandlersMap;
TraceEventDispatcher()
: m_processEventsTaskInFlight(false)
, m_lastEventProcessingTime(0)
{
}
static void dispatchEventOnAnyThread(char phase, const unsigned char*, const char* name, unsigned long long id,
int numArgs, const char* const* argNames, const unsigned char* argTypes, const unsigned long long* argValues,
unsigned char flags, double timestamp);
void enqueueEvent(const TraceEvent&);
void innerAddListener(const char* name, char phase, TraceEventTargetBase*, TraceEventHandlerMethod, InspectorClient*);
void processBackgroundEventsTask();
Mutex m_mutex;
HandlersMap m_handlers;
Vector<TraceEvent> m_backgroundEvents;
bool m_processEventsTaskInFlight;
double m_lastEventProcessingTime;
};
template<typename C> struct TraceEventTarget : public TraceEventTargetBase {
typedef void (C::*TraceEventHandler)(const TraceEventDispatcher::TraceEvent&);
};
} // namespace WebCore
#endif // TraceEventDispatcher_h
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