2 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "JSContextRef.h"
28 #include "JSContextRefPrivate.h"
31 #include "InitializeThreading.h"
32 #include "JSCallbackObject.h"
33 #include "JSClassRef.h"
34 #include "JSGlobalObject.h"
36 #include <wtf/Platform.h>
39 #include <mach-o/dyld.h>
41 static const int32_t webkitFirstVersionWithConcurrentGlobalContexts
= 0x2100500; // 528.5.0
46 JSContextGroupRef
JSContextGroupCreate()
48 initializeThreading();
49 return toRef(JSGlobalData::createNonDefault().releaseRef());
52 JSContextGroupRef
JSContextGroupRetain(JSContextGroupRef group
)
58 void JSContextGroupRelease(JSContextGroupRef group
)
63 JSGlobalContextRef
JSGlobalContextCreate(JSClassRef globalObjectClass
)
65 initializeThreading();
67 // When running on Tiger or Leopard, or if the application was linked before JSGlobalContextCreate was changed
68 // to use a unique JSGlobalData, we use a shared one for compatibility.
69 #if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD)
70 if (NSVersionOfLinkTimeLibrary("JavaScriptCore") <= webkitFirstVersionWithConcurrentGlobalContexts
) {
74 JSLock
lock(LockForReal
);
75 return JSGlobalContextCreateInGroup(toRef(&JSGlobalData::sharedInstance()), globalObjectClass
);
79 return JSGlobalContextCreateInGroup(0, globalObjectClass
);
82 JSGlobalContextRef
JSGlobalContextCreateInGroup(JSContextGroupRef group
, JSClassRef globalObjectClass
)
84 initializeThreading();
86 JSLock
lock(LockForReal
);
87 RefPtr
<JSGlobalData
> globalData
= group
? PassRefPtr
<JSGlobalData
>(toJS(group
)) : JSGlobalData::createNonDefault();
89 APIEntryShim
entryShim(globalData
.get(), false);
91 #if ENABLE(JSC_MULTIPLE_THREADS)
92 globalData
->makeUsableFromMultipleThreads();
95 if (!globalObjectClass
) {
96 JSGlobalObject
* globalObject
= new (globalData
.get()) JSGlobalObject
;
97 return JSGlobalContextRetain(toGlobalRef(globalObject
->globalExec()));
100 JSGlobalObject
* globalObject
= new (globalData
.get()) JSCallbackObject
<JSGlobalObject
>(globalObjectClass
);
101 ExecState
* exec
= globalObject
->globalExec();
102 JSValue prototype
= globalObjectClass
->prototype(exec
);
104 prototype
= jsNull();
105 globalObject
->resetPrototype(prototype
);
106 return JSGlobalContextRetain(toGlobalRef(exec
));
109 JSGlobalContextRef
JSGlobalContextRetain(JSGlobalContextRef ctx
)
111 ExecState
* exec
= toJS(ctx
);
112 APIEntryShim
entryShim(exec
);
114 JSGlobalData
& globalData
= exec
->globalData();
115 gcProtect(exec
->dynamicGlobalObject());
120 void JSGlobalContextRelease(JSGlobalContextRef ctx
)
122 ExecState
* exec
= toJS(ctx
);
125 JSGlobalData
& globalData
= exec
->globalData();
126 IdentifierTable
* savedIdentifierTable
= setCurrentIdentifierTable(globalData
.identifierTable
);
128 gcUnprotect(exec
->dynamicGlobalObject());
130 if (globalData
.refCount() == 2) { // One reference is held by JSGlobalObject, another added by JSGlobalContextRetain().
131 // The last reference was released, this is our last chance to collect.
132 globalData
.heap
.destroy();
134 globalData
.heap
.collectAllGarbage();
138 setCurrentIdentifierTable(savedIdentifierTable
);
141 JSObjectRef
JSContextGetGlobalObject(JSContextRef ctx
)
143 ExecState
* exec
= toJS(ctx
);
144 APIEntryShim
entryShim(exec
);
146 // It is necessary to call toThisObject to get the wrapper object when used with WebCore.
147 return toRef(exec
->lexicalGlobalObject()->toThisObject(exec
));
150 JSContextGroupRef
JSContextGetGroup(JSContextRef ctx
)
152 ExecState
* exec
= toJS(ctx
);
153 return toRef(&exec
->globalData());
156 JSGlobalContextRef
JSContextGetGlobalContext(JSContextRef ctx
)
158 ExecState
* exec
= toJS(ctx
);
159 APIEntryShim
entryShim(exec
);
161 return toGlobalRef(exec
->lexicalGlobalObject()->globalExec());