1 | /* |
2 | * Copyright (C) 2006, 2007 Apple 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 |
6 | * are met: |
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. |
12 | * |
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. |
24 | */ |
25 | |
26 | #include "config.h" |
27 | #include "JSContextRef.h" |
28 | #include "JSContextRefPrivate.h" |
29 | |
30 | #include "APICast.h" |
31 | #include "InitializeThreading.h" |
32 | #include "JSCallbackObject.h" |
33 | #include "JSClassRef.h" |
34 | #include "JSGlobalObject.h" |
35 | #include "JSObject.h" |
36 | #include <wtf/Platform.h> |
37 | |
38 | #if OS(DARWIN) |
39 | #include <mach-o/dyld.h> |
40 | |
41 | static const int32_t webkitFirstVersionWithConcurrentGlobalContexts = 0x2100500; // 528.5.0 |
42 | #endif |
43 | |
44 | using namespace JSC; |
45 | |
46 | JSContextGroupRef JSContextGroupCreate() |
47 | { |
48 | initializeThreading(); |
49 | return toRef(g: JSGlobalData::createNonDefault().releaseRef()); |
50 | } |
51 | |
52 | JSContextGroupRef JSContextGroupRetain(JSContextGroupRef group) |
53 | { |
54 | toJS(g: group)->ref(); |
55 | return group; |
56 | } |
57 | |
58 | void JSContextGroupRelease(JSContextGroupRef group) |
59 | { |
60 | toJS(g: group)->deref(); |
61 | } |
62 | |
63 | JSGlobalContextRef JSGlobalContextCreate(JSClassRef globalObjectClass) |
64 | { |
65 | initializeThreading(); |
66 | #if OS(DARWIN) |
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) { |
71 | #else |
72 | { |
73 | #endif |
74 | JSLock lock(LockForReal); |
75 | return JSGlobalContextCreateInGroup(toRef(&JSGlobalData::sharedInstance()), globalObjectClass); |
76 | } |
77 | #endif // OS(DARWIN) |
78 | |
79 | return JSGlobalContextCreateInGroup(group: 0, globalObjectClass); |
80 | } |
81 | |
82 | JSGlobalContextRef JSGlobalContextCreateInGroup(JSContextGroupRef group, JSClassRef globalObjectClass) |
83 | { |
84 | initializeThreading(); |
85 | |
86 | JSLock lock(LockForReal); |
87 | RefPtr<JSGlobalData> globalData = group ? PassRefPtr<JSGlobalData>(toJS(g: group)) : JSGlobalData::createNonDefault(); |
88 | |
89 | APIEntryShim entryShim(globalData.get(), false); |
90 | |
91 | #if ENABLE(JSC_MULTIPLE_THREADS) |
92 | globalData->makeUsableFromMultipleThreads(); |
93 | #endif |
94 | |
95 | if (!globalObjectClass) { |
96 | JSGlobalObject* globalObject = new (globalData.get()) JSGlobalObject; |
97 | return JSGlobalContextRetain(ctx: toGlobalRef(e: globalObject->globalExec())); |
98 | } |
99 | |
100 | JSGlobalObject* globalObject = new (globalData.get()) JSCallbackObject<JSGlobalObject>(globalObjectClass); |
101 | ExecState* exec = globalObject->globalExec(); |
102 | JSValue prototype = globalObjectClass->prototype(exec); |
103 | if (!prototype) |
104 | prototype = jsNull(); |
105 | globalObject->resetPrototype(prototype); |
106 | return JSGlobalContextRetain(ctx: toGlobalRef(e: exec)); |
107 | } |
108 | |
109 | JSGlobalContextRef JSGlobalContextRetain(JSGlobalContextRef ctx) |
110 | { |
111 | ExecState* exec = toJS(c: ctx); |
112 | APIEntryShim entryShim(exec); |
113 | |
114 | JSGlobalData& globalData = exec->globalData(); |
115 | gcProtect(val: exec->dynamicGlobalObject()); |
116 | globalData.ref(); |
117 | return ctx; |
118 | } |
119 | |
120 | void JSGlobalContextRelease(JSGlobalContextRef ctx) |
121 | { |
122 | ExecState* exec = toJS(c: ctx); |
123 | APIEntryShim entryShim(exec, false); |
124 | |
125 | gcUnprotect(val: exec->dynamicGlobalObject()); |
126 | |
127 | JSGlobalData& globalData = exec->globalData(); |
128 | if (globalData.refCount() == 2) { // One reference is held by JSGlobalObject, another added by JSGlobalContextRetain(). |
129 | // The last reference was released, this is our last chance to collect. |
130 | globalData.heap.destroy(); |
131 | } else |
132 | globalData.heap.collectAllGarbage(); |
133 | |
134 | globalData.deref(); |
135 | } |
136 | |
137 | JSObjectRef JSContextGetGlobalObject(JSContextRef ctx) |
138 | { |
139 | ExecState* exec = toJS(c: ctx); |
140 | APIEntryShim entryShim(exec); |
141 | |
142 | // It is necessary to call toThisObject to get the wrapper object when used with WebCore. |
143 | return toRef(o: exec->lexicalGlobalObject()->toThisObject(exec)); |
144 | } |
145 | |
146 | JSContextGroupRef JSContextGetGroup(JSContextRef ctx) |
147 | { |
148 | ExecState* exec = toJS(c: ctx); |
149 | return toRef(g: &exec->globalData()); |
150 | } |
151 | |
152 | JSGlobalContextRef JSContextGetGlobalContext(JSContextRef ctx) |
153 | { |
154 | ExecState* exec = toJS(c: ctx); |
155 | APIEntryShim entryShim(exec); |
156 | |
157 | return toGlobalRef(e: exec->lexicalGlobalObject()->globalExec()); |
158 | } |
159 | |