pjs/xpcom/base/nsCycleCollector.h

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#ifndef nsCycleCollector_h__
#define nsCycleCollector_h__

// NOTE: If you use header files to define DEBUG_CC, you must do so here
// *and* in nsCycleCollectionParticipant.h
//#define DEBUG_CC

class nsISupports;
class nsCycleCollectionParticipant;

// An nsCycleCollectionLanguageRuntime is a per-language object that
// implements language-specific aspects of the cycle collection task.

struct nsCycleCollectionLanguageRuntime
{
    virtual nsresult BeginCycleCollection() = 0;
    virtual nsresult FinishCycleCollection() = 0;
    virtual nsCycleCollectionParticipant *ToParticipant(void *p) = 0;
#ifdef DEBUG_CC
    virtual void PrintAllReferencesTo(void *p) = 0;

    // Call suspectCurrent on any extra pointers that will help build a
    // larger object graph for debugging.
    virtual void SuspectExtraPointers() = 0;
#endif
};

// PRBool nsCycleCollector_suspect(nsISupports *n);
NS_COM void nsCycleCollector_suspectCurrent(nsISupports *n);
// NS_COM PRBool nsCycleCollector_forget(nsISupports *n);
nsresult nsCycleCollector_startup();
// Returns PR_TRUE if some nodes were collected.
NS_COM PRBool nsCycleCollector_collect();
void nsCycleCollector_shutdown();

#ifdef DEBUG
NS_COM void nsCycleCollector_DEBUG_shouldBeFreed(nsISupports *n);
NS_COM void nsCycleCollector_DEBUG_wasFreed(nsISupports *n);
#endif

// Helpers for interacting with language-identified scripts

NS_COM void nsCycleCollector_registerRuntime(PRUint32 langID, nsCycleCollectionLanguageRuntime *rt);
NS_COM void nsCycleCollector_forgetRuntime(PRUint32 langID);

#endif // nsCycleCollector_h__