1 /* 2 * Copyright (C) 2009 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 V8GCController_h 32 #define V8GCController_h 33 34 #include <v8.h> 35 36 namespace WebCore { 37 38 #ifndef NDEBUG 39 40 #define GlobalHandleTypeList(V) \ 41 V(PROXY) \ 42 V(NPOBJECT) \ 43 V(SCHEDULED_ACTION) \ 44 V(EVENT_LISTENER) \ 45 V(NODE_FILTER) \ 46 V(SCRIPTINSTANCE) \ 47 V(SCRIPTVALUE) \ 48 V(DATASOURCE) 49 50 51 // Host information of persistent handles. 52 enum GlobalHandleType { 53 #define ENUM(name) name, 54 GlobalHandleTypeList(ENUM) 55 #undef ENUM 56 }; 57 58 class GlobalHandleInfo { 59 public: GlobalHandleInfo(void * host,GlobalHandleType type)60 GlobalHandleInfo(void* host, GlobalHandleType type) : m_host(host), m_type(type) { } 61 void* m_host; 62 GlobalHandleType m_type; 63 }; 64 65 #endif // NDEBUG 66 67 class V8GCController { 68 public: 69 // Protect/Unprotect JS wrappers of a DOM object. 70 static void gcProtect(void* domObject); 71 static void gcUnprotect(void* domObject); 72 73 #ifndef NDEBUG 74 // For debugging and leak detection purpose. 75 static void registerGlobalHandle(GlobalHandleType, void*, v8::Persistent<v8::Value>); 76 static void unregisterGlobalHandle(void*, v8::Persistent<v8::Value>); 77 #endif 78 79 static void gcPrologue(); 80 static void gcEpilogue(); 81 82 static void checkMemoryUsage(); 83 84 private: 85 // Estimate of current working set. 86 static int workingSetEstimateMB; 87 }; 88 89 } 90 91 #endif // V8GCController_h 92