xpcom/glue/nsCycleCollectionParticipant.cpp

branch
TOR_BUG_9701
changeset 8
97036ab72558
equal deleted inserted replaced
-1:000000000000 0:f054c9fc72b9
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6 #include "nsCycleCollectionParticipant.h"
7 #include "nsCOMPtr.h"
8 #include "jsapi.h"
9
10 #ifdef MOZILLA_INTERNAL_API
11 #include "nsString.h"
12 #else
13 #include "nsStringAPI.h"
14 #endif
15
16 void
17 nsScriptObjectTracer::NoteJSChild(void *aScriptThing, const char *name,
18 void *aClosure)
19 {
20 nsCycleCollectionTraversalCallback *cb =
21 static_cast<nsCycleCollectionTraversalCallback*>(aClosure);
22 NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*cb, name);
23 cb->NoteJSChild(aScriptThing);
24 }
25
26 NS_IMETHODIMP_(void)
27 nsXPCOMCycleCollectionParticipant::Root(void *p)
28 {
29 nsISupports *s = static_cast<nsISupports*>(p);
30 NS_ADDREF(s);
31 }
32
33 NS_IMETHODIMP_(void)
34 nsXPCOMCycleCollectionParticipant::Unroot(void *p)
35 {
36 nsISupports *s = static_cast<nsISupports*>(p);
37 NS_RELEASE(s);
38 }
39
40 // We define a default trace function because some participants don't need
41 // to trace anything, so it is okay for them not to define one.
42 NS_IMETHODIMP_(void)
43 nsXPCOMCycleCollectionParticipant::Trace(void *p, const TraceCallbacks &cb,
44 void *closure)
45 {
46 }
47
48 bool
49 nsXPCOMCycleCollectionParticipant::CheckForRightISupports(nsISupports *s)
50 {
51 nsISupports* foo;
52 s->QueryInterface(NS_GET_IID(nsCycleCollectionISupports),
53 reinterpret_cast<void**>(&foo));
54 return s == foo;
55 }
56
57 void
58 CycleCollectionNoteEdgeNameImpl(nsCycleCollectionTraversalCallback& aCallback,
59 const char* aName,
60 uint32_t aFlags)
61 {
62 nsAutoCString arrayEdgeName(aName);
63 if (aFlags & CycleCollectionEdgeNameArrayFlag) {
64 arrayEdgeName.AppendLiteral("[i]");
65 }
66 aCallback.NoteNextEdgeName(arrayEdgeName.get());
67 }
68
69 void
70 TraceCallbackFunc::Trace(JS::Heap<JS::Value>* p, const char* name, void* closure) const
71 {
72 if (p->isMarkable()) {
73 mCallback(p->toGCThing(), name, closure);
74 }
75 }
76
77 void
78 TraceCallbackFunc::Trace(JS::Heap<jsid>* p, const char* name, void* closure) const
79 {
80 void *thing = JSID_TO_GCTHING(*p);
81 if (thing) {
82 mCallback(thing, name, closure);
83 }
84 }
85
86 void
87 TraceCallbackFunc::Trace(JS::Heap<JSObject*>* p, const char* name, void* closure) const
88 {
89 mCallback(*p, name, closure);
90 }
91
92 void
93 TraceCallbackFunc::Trace(JS::TenuredHeap<JSObject*>* p, const char* name, void* closure) const
94 {
95 mCallback(*p, name, closure);
96 }
97
98 void
99 TraceCallbackFunc::Trace(JS::Heap<JSFunction*>* p, const char* name, void* closure) const
100 {
101 mCallback(*p, name, closure);
102 }
103
104 void
105 TraceCallbackFunc::Trace(JS::Heap<JSString*>* p, const char* name, void* closure) const
106 {
107 mCallback(*p, name, closure);
108 }
109
110 void
111 TraceCallbackFunc::Trace(JS::Heap<JSScript*>* p, const char* name, void* closure) const
112 {
113 mCallback(p->get(), name, closure);
114 }

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