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Bug 727313 - avoid warnings, add case for skippable CC macros. r=smaug

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This commit is contained in:
Andrew McCreight 2012-02-15 15:28:42 -08:00
parent e8f57a8f44
commit c4adf5736e
1 changed files with 25 additions and 0 deletions
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25
xpcom/glue/nsCycleCollectionParticipant.h
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@ -299,6 +299,10 @@ public:
#define NS_CYCLE_COLLECTION_UPCAST(obj, clazz) \
NS_CYCLE_COLLECTION_CLASSNAME(clazz)::Upcast(obj)
///////////////////////////////////////////////////////////////////////////////
// Helpers for implementing CanSkip methods
///////////////////////////////////////////////////////////////////////////////
#define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(_class) \
NS_IMETHODIMP_(bool) \
NS_CYCLE_COLLECTION_CLASSNAME(_class)::CanSkipReal(void *p, \
@ -310,6 +314,7 @@ public:
_class *tmp = Downcast(s);
#define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END \
(void)tmp; \
return false; \
}
@ -323,6 +328,7 @@ public:
_class *tmp = Downcast(s);
#define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END \
(void)tmp; \
return false; \
}
@ -336,6 +342,7 @@ public:
_class *tmp = Downcast(s);
#define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END \
(void)tmp; \
return false; \
}
@ -614,6 +621,24 @@ NS_CYCLE_COLLECTION_PARTICIPANT_INSTANCE
#define NS_DECL_CYCLE_COLLECTION_CLASS(_class) \
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(_class, _class)
// Cycle collector helper for ambiguous classes that can sometimes be skipped.
#define NS_DECL_CYCLE_COLLECTION_SKIPPABLE_CLASS_AMBIGUOUS(_class, _base) \
class NS_CYCLE_COLLECTION_INNERCLASS \
: public nsXPCOMCycleCollectionParticipant \
{ \
public: \
NS_CYCLE_COLLECTION_INNERCLASS () : nsXPCOMCycleCollectionParticipant(true) {} \
NS_DECL_CYCLE_COLLECTION_CLASS_BODY(_class, _base) \
protected: \
NS_IMETHOD_(bool) CanSkipReal(void *p, bool aRemovingAllowed); \
NS_IMETHOD_(bool) CanSkipInCCReal(void *p); \
NS_IMETHOD_(bool) CanSkipThisReal(void *p); \
}; \
NS_CYCLE_COLLECTION_PARTICIPANT_INSTANCE
#define NS_DECL_CYCLE_COLLECTION_SKIPPABLE_CLASS(_class) \
NS_DECL_CYCLE_COLLECTION_SKIPPABLE_CLASS_AMBIGUOUS(_class, _class)
// Cycle collector helper for classes that don't want to unlink anything.
// Note: if this is used a lot it might make sense to have a base class that
// doesn't do anything in Root/Unlink/Unroot.