1 /* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef EventTracer_h 32 #define EventTracer_h 33 34 #include "platform/PlatformExport.h" 35 #include <stdint.h> 36 37 // This will mark the trace event as disabled by default. The user will need 38 // to explicitly enable the event. 39 #define TRACE_DISABLED_BY_DEFAULT(name) "disabled-by-default-" name 40 41 namespace WebCore { 42 43 namespace TraceEvent { 44 typedef uint64_t TraceEventHandle; 45 } 46 47 // FIXME: Make these global variables thread-safe. Make a value update atomic. 48 PLATFORM_EXPORT extern long* traceSamplingState[3]; 49 50 class PLATFORM_EXPORT EventTracer { 51 public: 52 static void initialize(); 53 static const unsigned char* getTraceCategoryEnabledFlag(const char*); 54 static TraceEvent::TraceEventHandle addTraceEvent(char phase, 55 const unsigned char* categoryEnabledFlag, 56 const char* name, 57 unsigned long long id, 58 int numArgs, 59 const char** argNames, 60 const unsigned char* argTypes, 61 const unsigned long long* argValues, 62 unsigned char flags); 63 static void updateTraceEventDuration(const unsigned char* categoryEnabledFlag, const char* name, TraceEvent::TraceEventHandle); 64 }; 65 66 } // namespace WebCore 67 68 #endif // EventTracer_h 69
