/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef nsCycleCollectionParticipant_h__ #define nsCycleCollectionParticipant_h__ #include "nsISupports.h" #define NS_CYCLECOLLECTIONPARTICIPANT_IID \ { \ 0x9674489b, \ 0x1f6f, \ 0x4550, \ { 0xa7, 0x30, 0xcc, 0xae, 0xdd, 0x10, 0x4c, 0xf9 } \ } /** * Special IID to get at the base nsISupports for a class. Usually this is the * canonical nsISupports pointer, but in the case of tearoffs for example it is * the base nsISupports pointer of the tearoff. This allow the cycle collector * to have separate nsCycleCollectionParticipant's for tearoffs or aggregated * classes. */ #define NS_CYCLECOLLECTIONISUPPORTS_IID \ { \ 0xc61eac14, \ 0x5f7a, \ 0x4481, \ { 0x96, 0x5e, 0x7e, 0xaa, 0x6e, 0xff, 0xa8, 0x5f } \ } /** * Just holds the IID so NS_GET_IID works. */ class nsCycleCollectionISupports { public: NS_DECLARE_STATIC_IID_ACCESSOR(NS_CYCLECOLLECTIONISUPPORTS_IID) }; NS_DEFINE_STATIC_IID_ACCESSOR(nsCycleCollectionISupports, NS_CYCLECOLLECTIONISUPPORTS_IID) class nsCycleCollectionParticipant; class NS_NO_VTABLE nsCycleCollectionTraversalCallback { public: // You must call DescribeRefCountedNode() with an accurate // refcount, otherwise cycle collection will fail, and probably crash. // If the callback cares about objsz or objname, it should // put WANT_DEBUG_INFO in mFlags. NS_IMETHOD_(void) DescribeRefCountedNode(nsrefcnt refcount, size_t objsz, const char *objname) = 0; NS_IMETHOD_(void) DescribeGCedNode(bool ismarked, size_t objsz, const char *objname) = 0; NS_IMETHOD_(void) NoteXPCOMRoot(nsISupports *root) = 0; NS_IMETHOD_(void) NoteJSRoot(void *root) = 0; NS_IMETHOD_(void) NoteNativeRoot(void *root, nsCycleCollectionParticipant *participant) = 0; NS_IMETHOD_(void) NoteXPCOMChild(nsISupports *child) = 0; NS_IMETHOD_(void) NoteJSChild(void *child) = 0; NS_IMETHOD_(void) NoteNativeChild(void *child, nsCycleCollectionParticipant *helper) = 0; // Give a name to the edge associated with the next call to // NoteXPCOMChild, NoteJSChild, or NoteNativeChild. // Callbacks who care about this should set WANT_DEBUG_INFO in the // flags. NS_IMETHOD_(void) NoteNextEdgeName(const char* name) = 0; NS_IMETHOD_(void) NoteWeakMapping(void *map, void *key, void *val) = 0; enum { // Values for flags: // Caller should pass useful objsz and objname to // DescribeRefCountedNode and DescribeGCedNode and should call // NoteNextEdgeName. WANT_DEBUG_INFO = (1<<0), // Caller should not skip objects that we know will be // uncollectable. WANT_ALL_TRACES = (1<<1) }; PRUint32 Flags() const { return mFlags; } bool WantDebugInfo() const { return (mFlags & WANT_DEBUG_INFO) != 0; } bool WantAllTraces() const { return (mFlags & WANT_ALL_TRACES) != 0; } protected: nsCycleCollectionTraversalCallback() : mFlags(0) {} PRUint32 mFlags; }; class NS_NO_VTABLE nsCycleCollectionParticipant { public: nsCycleCollectionParticipant() : mMightSkip(false) {} nsCycleCollectionParticipant(bool aSkip) : mMightSkip(aSkip) {} NS_DECLARE_STATIC_IID_ACCESSOR(NS_CYCLECOLLECTIONPARTICIPANT_IID) NS_IMETHOD Traverse(void *p, nsCycleCollectionTraversalCallback &cb) = 0; NS_IMETHOD Root(void *p) = 0; NS_IMETHOD Unlink(void *p) = 0; NS_IMETHOD Unroot(void *p) = 0; // If CanSkip returns true, p is removed from the purple buffer during // a call to nsCycleCollector_forgetSkippable(). // Note, calling CanSkip may remove objects from the purple buffer! // If aRemovingAllowed is true, p can be removed from the purple buffer. bool CanSkip(void *p, bool aRemovingAllowed) { return mMightSkip ? CanSkipReal(p, aRemovingAllowed) : false; } // If CanSkipInCC returns true, p is skipped when selecting roots for the // cycle collector graph. // Note, calling CanSkipInCC may remove other objects from the purple buffer! bool CanSkipInCC(void *p) { return mMightSkip ? CanSkipInCCReal(p) : false; } // If CanSkipThis returns true, p is not added to the graph. // This method is called during cycle collection, so don't // change the state of any objects! bool CanSkipThis(void *p) { return mMightSkip ? CanSkipThisReal(p) : false; } protected: NS_IMETHOD_(bool) CanSkipReal(void *p, bool aRemovingAllowed) { NS_ASSERTION(false, "Forgot to implement CanSkipReal?"); return false; } NS_IMETHOD_(bool) CanSkipInCCReal(void *p) { NS_ASSERTION(false, "Forgot to implement CanSkipInCCReal?"); return false; } NS_IMETHOD_(bool) CanSkipThisReal(void *p) { NS_ASSERTION(false, "Forgot to implement CanSkipThisReal?"); return false; } bool mMightSkip; }; NS_DEFINE_STATIC_IID_ACCESSOR(nsCycleCollectionParticipant, NS_CYCLECOLLECTIONPARTICIPANT_IID) #undef IMETHOD_VISIBILITY #define IMETHOD_VISIBILITY NS_COM_GLUE typedef void (* TraceCallback)(void *p, const char *name, void *closure); class NS_NO_VTABLE nsScriptObjectTracer : public nsCycleCollectionParticipant { public: nsScriptObjectTracer() : nsCycleCollectionParticipant(false) {} nsScriptObjectTracer(bool aSkip) : nsCycleCollectionParticipant(aSkip) {} NS_IMETHOD_(void) Trace(void *p, TraceCallback cb, void *closure) = 0; void NS_COM_GLUE TraverseScriptObjects(void *p, nsCycleCollectionTraversalCallback &cb); }; class NS_COM_GLUE nsXPCOMCycleCollectionParticipant : public nsScriptObjectTracer { public: nsXPCOMCycleCollectionParticipant() : nsScriptObjectTracer(false) {} nsXPCOMCycleCollectionParticipant(bool aSkip) : nsScriptObjectTracer(aSkip) {} NS_IMETHOD Traverse(void *p, nsCycleCollectionTraversalCallback &cb); NS_IMETHOD Root(void *p); NS_IMETHOD Unlink(void *p); NS_IMETHOD Unroot(void *p); NS_IMETHOD_(void) Trace(void *p, TraceCallback cb, void *closure); NS_IMETHOD_(void) UnmarkIfPurple(nsISupports *p); bool CheckForRightISupports(nsISupports *s); }; #undef IMETHOD_VISIBILITY #define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN /////////////////////////////////////////////////////////////////////////////// // Helpers for implementing a QI to nsXPCOMCycleCollectionParticipant /////////////////////////////////////////////////////////////////////////////// #define NS_CYCLE_COLLECTION_INNERCLASS \ cycleCollection #define NS_CYCLE_COLLECTION_CLASSNAME(_class) \ _class::NS_CYCLE_COLLECTION_INNERCLASS #define NS_CYCLE_COLLECTION_INNERNAME \ _cycleCollectorGlobal #define NS_CYCLE_COLLECTION_NAME(_class) \ _class::NS_CYCLE_COLLECTION_INNERNAME #define NS_IMPL_QUERY_CYCLE_COLLECTION(_class) \ if ( aIID.Equals(NS_GET_IID(nsXPCOMCycleCollectionParticipant)) ) { \ *aInstancePtr = & NS_CYCLE_COLLECTION_NAME(_class); \ return NS_OK; \ } else #define NS_IMPL_QUERY_CYCLE_COLLECTION_ISUPPORTS(_class) \ if ( aIID.Equals(NS_GET_IID(nsCycleCollectionISupports)) ) { \ *aInstancePtr = NS_CYCLE_COLLECTION_CLASSNAME(_class)::Upcast(this); \ return NS_OK; \ } else #define NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION(_class) \ NS_IMPL_QUERY_CYCLE_COLLECTION(_class) #define NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION_ISUPPORTS(_class) \ NS_IMPL_QUERY_CYCLE_COLLECTION_ISUPPORTS(_class) #define NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(_class) \ NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION(_class) \ NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION_ISUPPORTS(_class) #define NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(_class) \ NS_INTERFACE_MAP_BEGIN(_class) \ NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(_class) #define NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(_class) \ NS_INTERFACE_MAP_BEGIN(_class) \ NS_INTERFACE_MAP_ENTRY_CYCLE_COLLECTION(_class) #define NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(_class) \ if (rv == NS_OK) return rv; \ nsISupports* foundInterface; \ NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(_class) #define NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(_class) \ NS_IMETHODIMP _class::QueryInterface(REFNSIID aIID, void** aInstancePtr) \ { \ NS_PRECONDITION(aInstancePtr, "null out param"); \ \ if ( aIID.Equals(NS_GET_IID(nsXPCOMCycleCollectionParticipant)) ) { \ *aInstancePtr = &NS_CYCLE_COLLECTION_NAME(_class); \ return NS_OK; \ } \ nsresult rv; #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, \ bool aRemovingAllowed) \ { \ nsISupports *s = static_cast(p); \ NS_ASSERTION(CheckForRightISupports(s), \ "not the nsISupports pointer we expect"); \ _class *tmp = Downcast(s); #define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END \ (void)tmp; \ return false; \ } #define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(_class) \ NS_IMETHODIMP_(bool) \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::CanSkipInCCReal(void *p) \ { \ nsISupports *s = static_cast(p); \ NS_ASSERTION(CheckForRightISupports(s), \ "not the nsISupports pointer we expect"); \ _class *tmp = Downcast(s); #define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END \ (void)tmp; \ return false; \ } #define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(_class) \ NS_IMETHODIMP_(bool) \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::CanSkipThisReal(void *p) \ { \ nsISupports *s = static_cast(p); \ NS_ASSERTION(CheckForRightISupports(s), \ "not the nsISupports pointer we expect"); \ _class *tmp = Downcast(s); #define NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END \ (void)tmp; \ return false; \ } /////////////////////////////////////////////////////////////////////////////// // Helpers for implementing nsCycleCollectionParticipant::Unlink /////////////////////////////////////////////////////////////////////////////// #define NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMETHODIMP \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unlink(void *p) \ { \ nsISupports *s = static_cast(p); \ NS_ASSERTION(CheckForRightISupports(s), \ "not the nsISupports pointer we expect"); \ _class *tmp = Downcast(s); #define NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(_class, _base_class) \ NS_IMETHODIMP \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unlink(void *p) \ { \ nsISupports *s = static_cast(p); \ NS_ASSERTION(CheckForRightISupports(s), \ "not the nsISupports pointer we expect"); \ _class *tmp = static_cast<_class*>(Downcast(s)); \ NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Unlink(s); #define NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_NATIVE(_class) \ NS_IMETHODIMP \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unlink(void *p) \ { \ _class *tmp = static_cast<_class*>(p); #define NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_field) \ tmp->_field = NULL; #define NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMARRAY(_field) \ tmp->_field.Clear(); #define NS_IMPL_CYCLE_COLLECTION_UNLINK_NSTARRAY(_field) \ tmp->_field.Clear(); #define NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ (void)tmp; \ return NS_OK; \ } #define NS_IMPL_CYCLE_COLLECTION_UNLINK_0(_class) \ NS_IMETHODIMP \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unlink(void *p) \ { \ NS_ASSERTION(CheckForRightISupports(static_cast(p)), \ "not the nsISupports pointer we expect"); \ return NS_OK; \ } #define NS_IMPL_CYCLE_COLLECTION_UNLINK_NATIVE_0(_class) \ NS_IMETHODIMP \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unlink(void *p) \ { \ return NS_OK; \ } /////////////////////////////////////////////////////////////////////////////// // Helpers for implementing nsCycleCollectionParticipant::Traverse /////////////////////////////////////////////////////////////////////////////// #define NS_IMPL_CYCLE_COLLECTION_DESCRIBE(_class, _refcnt) \ cb.DescribeRefCountedNode(_refcnt, sizeof(_class), #_class); #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(_class) \ NS_IMETHODIMP \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Traverse \ (void *p, \ nsCycleCollectionTraversalCallback &cb) \ { \ nsISupports *s = static_cast(p); \ NS_ASSERTION(CheckForRightISupports(s), \ "not the nsISupports pointer we expect"); \ _class *tmp = static_cast<_class*>(Downcast(s)); #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(_class) \ NS_IMPL_CYCLE_COLLECTION_DESCRIBE(_class, tmp->mRefCnt.get()) // Base class' CC participant should return NS_SUCCESS_INTERRUPTED_TRAVERSE // from Traverse if it wants derived classes to not traverse anything from // their CC participant. #define NS_SUCCESS_INTERRUPTED_TRAVERSE \ NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_XPCOM, 2) #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(_class, _base_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(_class) \ if (NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Traverse(s, cb) == \ NS_SUCCESS_INTERRUPTED_TRAVERSE) { \ return NS_SUCCESS_INTERRUPTED_TRAVERSE; \ } #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_BEGIN(_class) \ NS_IMETHODIMP \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Traverse \ (void *p, \ nsCycleCollectionTraversalCallback &cb) \ { \ _class *tmp = static_cast<_class*>(p); \ NS_IMPL_CYCLE_COLLECTION_DESCRIBE(_class, tmp->mRefCnt.get()) #define NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(_cb, _name) \ PR_BEGIN_MACRO \ if (NS_UNLIKELY((_cb).WantDebugInfo())) { \ (_cb).NoteNextEdgeName(_name); \ } \ PR_END_MACRO #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(_field) \ PR_BEGIN_MACRO \ NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, #_field); \ cb.NoteXPCOMChild(tmp->_field); \ PR_END_MACRO; #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_field) \ PR_BEGIN_MACRO \ NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, #_field); \ cb.NoteXPCOMChild(tmp->_field.get()); \ PR_END_MACRO; #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(_field, _base) \ PR_BEGIN_MACRO \ NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, #_field); \ cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(_base*, tmp->_field)); \ PR_END_MACRO; #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMARRAY(_field) \ { \ PRInt32 i; \ for (i = 0; i < tmp->_field.Count(); ++i) { \ NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, #_field "[i]"); \ cb.NoteXPCOMChild(tmp->_field[i]); \ } \ } #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_PTR(_ptr, _ptr_class, _name) \ PR_BEGIN_MACRO \ NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, _name); \ cb.NoteNativeChild(_ptr, &NS_CYCLE_COLLECTION_NAME(_ptr_class)); \ PR_END_MACRO; #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_MEMBER(_field, _field_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_PTR(tmp->_field, _field_class, \ #_field) #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSTARRAY(_array, _element_class, \ _name) \ { \ PRUint32 i, length = (_array).Length(); \ for (i = 0; i < length; ++i) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_PTR((_array)[i], \ _element_class, \ _name "[i]"); \ } #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSTARRAY_OF_NSCOMPTR(_field) \ { \ PRUint32 i, length = tmp->_field.Length(); \ for (i = 0; i < length; ++i) { \ NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, #_field "[i]"); \ cb.NoteXPCOMChild(tmp->_field[i].get()); \ } \ } #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSTARRAY_MEMBER(_field, \ _element_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSTARRAY(tmp->_field, _element_class, \ #_field) #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ TraverseScriptObjects(p, cb); #define NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ return NS_OK; \ } /////////////////////////////////////////////////////////////////////////////// // Helpers for implementing nsScriptObjectTracer::Trace /////////////////////////////////////////////////////////////////////////////// #define NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(_class) \ void \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Trace(void *p, \ TraceCallback aCallback, \ void *aClosure) \ { \ nsISupports *s = static_cast(p); \ NS_ASSERTION(CheckForRightISupports(s), \ "not the nsISupports pointer we expect"); \ _class *tmp = Downcast(s); #define NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(_class, _base_class) \ void \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Trace(void *p, \ TraceCallback aCallback, \ void *aClosure) \ { \ nsISupports *s = static_cast(p); \ NS_ASSERTION(CheckForRightISupports(s), \ "not the nsISupports pointer we expect"); \ _class *tmp = static_cast<_class*>(Downcast(s)); \ NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Trace(s, \ aCallback, \ aClosure); #define NS_IMPL_CYCLE_COLLECTION_TRACE_NATIVE_BEGIN(_class) \ void \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Trace(void *p, \ TraceCallback aCallback, \ void *aClosure) \ { \ _class *tmp = static_cast<_class*>(p); #define NS_IMPL_CYCLE_COLLECTION_TRACE_JS_CALLBACK(_object, _name) \ if (_object) \ aCallback(_object, _name, aClosure); #define NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(_field) \ NS_IMPL_CYCLE_COLLECTION_TRACE_JS_CALLBACK(tmp->_field, #_field) // NB: The (void)tmp; hack in the TRACE_END macro exists to support // implementations that don't need to do anything in their Trace method. // Without this hack, some compilers warn about the unused tmp local. #define NS_IMPL_CYCLE_COLLECTION_TRACE_END \ (void)tmp; \ } /////////////////////////////////////////////////////////////////////////////// // Helpers for implementing a concrete nsCycleCollectionParticipant /////////////////////////////////////////////////////////////////////////////// #define NS_CYCLE_COLLECTION_PARTICIPANT_INSTANCE \ static NS_CYCLE_COLLECTION_INNERCLASS NS_CYCLE_COLLECTION_INNERNAME; #define NS_DECL_CYCLE_COLLECTION_CLASS_BODY_NO_UNLINK(_class, _base) \ public: \ NS_IMETHOD Traverse(void *p, \ nsCycleCollectionTraversalCallback &cb); \ NS_IMETHOD_(void) UnmarkIfPurple(nsISupports *s) \ { \ Downcast(s)->UnmarkIfPurple(); \ } \ static _class* Downcast(nsISupports* s) \ { \ return static_cast<_class*>(static_cast<_base*>(s)); \ } \ static nsISupports* Upcast(_class *p) \ { \ return NS_ISUPPORTS_CAST(_base*, p); \ } #define NS_DECL_CYCLE_COLLECTION_CLASS_BODY(_class, _base) \ NS_DECL_CYCLE_COLLECTION_CLASS_BODY_NO_UNLINK(_class, _base) \ NS_IMETHOD Unlink(void *p); #define NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(_class, _base) \ class NS_CYCLE_COLLECTION_INNERCLASS \ : public nsXPCOMCycleCollectionParticipant \ { \ NS_DECL_CYCLE_COLLECTION_CLASS_BODY(_class, _base) \ }; \ 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. #define NS_DECL_CYCLE_COLLECTION_CLASS_NO_UNLINK(_class) \ class NS_CYCLE_COLLECTION_INNERCLASS \ : public nsXPCOMCycleCollectionParticipant \ { \ NS_DECL_CYCLE_COLLECTION_CLASS_BODY_NO_UNLINK(_class, _class) \ NS_IMETHOD Root(void *p) \ { \ return NS_OK; \ } \ NS_IMETHOD Unlink(void *p) \ { \ return NS_OK; \ } \ NS_IMETHOD Unroot(void *p) \ { \ return NS_OK; \ } \ }; \ NS_CYCLE_COLLECTION_PARTICIPANT_INSTANCE #define NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(_class, _base) \ class NS_CYCLE_COLLECTION_INNERCLASS \ : public nsXPCOMCycleCollectionParticipant \ { \ NS_DECL_CYCLE_COLLECTION_CLASS_BODY(_class, _base) \ NS_IMETHOD_(void) Trace(void *p, TraceCallback cb, void *closure); \ }; \ NS_CYCLE_COLLECTION_PARTICIPANT_INSTANCE #define NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_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) \ NS_IMETHOD_(void) Trace(void *p, TraceCallback cb, void *closure); \ 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_SCRIPT_HOLDER_CLASS(_class) \ NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_AMBIGUOUS(_class, _class) #define NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_INHERITED(_class, \ _base_class) \ class NS_CYCLE_COLLECTION_INNERCLASS \ : public NS_CYCLE_COLLECTION_CLASSNAME(_base_class) \ { \ public: \ NS_CYCLE_COLLECTION_INNERCLASS () \ : NS_CYCLE_COLLECTION_CLASSNAME(_base_class)() \ { \ mMightSkip = true; \ } \ NS_IMETHOD_(void) Trace(void *p, TraceCallback cb, void *closure); \ NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY(_class, _base_class) \ 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_SCRIPT_HOLDER_CLASS(_class) \ NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(_class, _class) #define NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY_NO_UNLINK(_class, \ _base_class) \ public: \ NS_IMETHOD Traverse(void *p, \ nsCycleCollectionTraversalCallback &cb); \ static _class* Downcast(nsISupports* s) \ { \ return static_cast<_class*>(static_cast<_base_class*>( \ NS_CYCLE_COLLECTION_CLASSNAME(_base_class)::Downcast(s))); \ } #define NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY(_class, _base_class) \ NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY_NO_UNLINK(_class, _base_class) \ NS_IMETHOD Unlink(void *p); #define NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(_class, _base_class) \ class NS_CYCLE_COLLECTION_INNERCLASS \ : public NS_CYCLE_COLLECTION_CLASSNAME(_base_class) \ { \ public: \ NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY(_class, _base_class) \ }; \ NS_CYCLE_COLLECTION_PARTICIPANT_INSTANCE #define NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_NO_UNLINK(_class, \ _base_class) \ class NS_CYCLE_COLLECTION_INNERCLASS \ : public NS_CYCLE_COLLECTION_CLASSNAME(_base_class) \ { \ public: \ NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY_NO_UNLINK(_class, _base_class) \ }; \ NS_CYCLE_COLLECTION_PARTICIPANT_INSTANCE #define NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(_class, \ _base_class) \ class NS_CYCLE_COLLECTION_INNERCLASS \ : public NS_CYCLE_COLLECTION_CLASSNAME(_base_class) \ { \ public: \ NS_IMETHOD_(void) Trace(void *p, TraceCallback cb, void *closure); \ NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_BODY(_class, _base_class) \ }; \ NS_CYCLE_COLLECTION_PARTICIPANT_INSTANCE /** * This implements a stub UnmarkIfPurple function for classes that want to be * traversed but whose AddRef/Release functions don't add/remove them to/from * the purple buffer. If you're just using NS_DECL_CYCLE_COLLECTING_ISUPPORTS * then you don't need this. */ #define NS_DECL_CYCLE_COLLECTION_UNMARK_PURPLE_STUB(_class) \ NS_IMETHODIMP_(void) UnmarkIfPurple() \ { \ } \ #define NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \ NS_CYCLE_COLLECTION_CLASSNAME(_class) NS_CYCLE_COLLECTION_NAME(_class); #define NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS_BODY \ public: \ NS_IMETHOD Root(void *n); \ NS_IMETHOD Unlink(void *n); \ NS_IMETHOD Unroot(void *n); \ NS_IMETHOD Traverse(void *n, \ nsCycleCollectionTraversalCallback &cb); #define NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(_class) \ class NS_CYCLE_COLLECTION_INNERCLASS \ : public nsCycleCollectionParticipant \ { \ NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS_BODY \ }; \ NS_CYCLE_COLLECTION_PARTICIPANT_INSTANCE #define NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(_class) \ class NS_CYCLE_COLLECTION_INNERCLASS \ : public nsScriptObjectTracer \ { \ NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS_BODY \ NS_IMETHOD_(void) Trace(void *p, TraceCallback cb, void *closure); \ }; \ NS_CYCLE_COLLECTION_PARTICIPANT_INSTANCE #define NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(_class, _root_function) \ NS_IMETHODIMP \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Root(void *p) \ { \ _class *tmp = static_cast<_class*>(p); \ tmp->_root_function(); \ return NS_OK; \ } #define NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(_class, _unroot_function) \ NS_IMETHODIMP \ NS_CYCLE_COLLECTION_CLASSNAME(_class)::Unroot(void *p) \ { \ _class *tmp = static_cast<_class*>(p); \ tmp->_unroot_function(); \ return NS_OK; \ } #define NS_IMPL_CYCLE_COLLECTION_0(_class) \ NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_0(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END #define NS_IMPL_CYCLE_COLLECTION_1(_class, _f) \ NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END #define NS_IMPL_CYCLE_COLLECTION_2(_class, _f1, _f2) \ NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END #define NS_IMPL_CYCLE_COLLECTION_3(_class, _f1, _f2, _f3) \ NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END #define NS_IMPL_CYCLE_COLLECTION_4(_class, _f1, _f2, _f3, _f4) \ NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END #define NS_IMPL_CYCLE_COLLECTION_5(_class, _f1, _f2, _f3, _f4, _f5) \ NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f5) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f5) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END #define NS_IMPL_CYCLE_COLLECTION_6(_class, _f1, _f2, _f3, _f4, _f5, _f6) \ NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f5) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f6) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f5) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f6) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END #define NS_IMPL_CYCLE_COLLECTION_7(_class, _f1, _f2, _f3, _f4, _f5, _f6, _f7) \ NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f5) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f6) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f7) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f5) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f6) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f7) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END #define NS_IMPL_CYCLE_COLLECTION_8(_class, _f1, _f2, _f3, _f4, _f5, _f6, _f7, _f8) \ NS_IMPL_CYCLE_COLLECTION_CLASS(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f5) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f6) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f7) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(_f8) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f5) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f6) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f7) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(_f8) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END #endif // nsCycleCollectionParticipant_h__