JSHeapConsistency Class Reference

#include <v8-cppgc.h>

Public Types
using	WriteBarrierParams = cppgc::internal::WriteBarrier::Params
using	WriteBarrierType = cppgc::internal::WriteBarrier::Type

Static Public Member Functions
template<typename HeapHandleCallback >
static V8_INLINE WriteBarrierType	GetWriteBarrierType (const TracedReferenceBase &ref, WriteBarrierParams &params, HeapHandleCallback callback)
template<typename HeapHandleCallback >
static V8_INLINE WriteBarrierType	GetWriteBarrierType (v8::Local< v8::Object > &wrapper, int wrapper_index, const void *wrappable, WriteBarrierParams &params, HeapHandleCallback callback)
static V8_INLINE void	DijkstraMarkingBarrier (const WriteBarrierParams &params, cppgc::HeapHandle &heap_handle, const TracedReferenceBase &ref)
static V8_INLINE void	DijkstraMarkingBarrier (const WriteBarrierParams &params, cppgc::HeapHandle &heap_handle, const void *object)
static V8_INLINE void	GenerationalBarrier (const WriteBarrierParams &params, const TracedReferenceBase &ref)

Detailed Description

DO NOT USE: Use the appropriate managed types.

Consistency helpers that aid in maintaining a consistent internal state of the garbage collector.

Definition at line 148 of file v8-cppgc.h.

Member Typedef Documentation

WriteBarrierParams

using WriteBarrierParams = cppgc::internal::WriteBarrier::Params

Definition at line 150 of file v8-cppgc.h.

WriteBarrierType

using WriteBarrierType = cppgc::internal::WriteBarrier::Type

Definition at line 151 of file v8-cppgc.h.

Member Function Documentation

DijkstraMarkingBarrier() [1/2]

static V8_INLINE void DijkstraMarkingBarrier ( const WriteBarrierParams &  params, cppgc::HeapHandle &  heap_handle, const TracedReferenceBase &  ref  )

inlinestatic

Conservative Dijkstra-style write barrier that processes an object if it has not yet been processed.

Parameters

params	The parameters retrieved from GetWriteBarrierType().
ref	The reference being written to.

Definition at line 224 of file v8-cppgc.h.

References WriteBarrier::CheckParams(), and WriteBarrier::kMarking.

DijkstraMarkingBarrier() [2/2]

static V8_INLINE void DijkstraMarkingBarrier ( const WriteBarrierParams &  params, cppgc::HeapHandle &  heap_handle, const void *  object  )

inlinestatic

Conservative Dijkstra-style write barrier that processes an object if it has not yet been processed.

Parameters

params	The parameters retrieved from GetWriteBarrierType().
object	The pointer to the object. May be an interior pointer to a an interface of the actual object.

Definition at line 240 of file v8-cppgc.h.

References WriteBarrier::DijkstraMarkingBarrier().

GenerationalBarrier()

static V8_INLINE void GenerationalBarrier ( const WriteBarrierParams &  params, const TracedReferenceBase &  ref  )

inlinestatic

Generational barrier for maintaining consistency when running with multiple generations.

Parameters

params	The parameters retrieved from GetWriteBarrierType().
ref	The reference being written to.

Definition at line 253 of file v8-cppgc.h.

GetWriteBarrierType() [1/2]

static V8_INLINE WriteBarrierType GetWriteBarrierType ( const TracedReferenceBase &  ref, WriteBarrierParams &  params, HeapHandleCallback  callback  )

inlinestatic

Gets the required write barrier type for a specific write.

Note: Handling for C++ to JS references.

Parameters

ref	The reference being written to.
params	Parameters that may be used for actual write barrier calls. Only filled if return value indicates that a write barrier is needed. The contents of the params are an implementation detail.
callback	Callback returning the corresponding heap handle. The callback is only invoked if the heap cannot otherwise be figured out. The callback must not allocate.

Returns

whether a write barrier is needed and which barrier to invoke.

Definition at line 169 of file v8-cppgc.h.

References WriteBarrier::Params::heap, WriteBarrier::IsAnyIncrementalOrConcurrentMarking(), TracedReferenceBase::IsEmpty(), HeapState::IsMarking(), WriteBarrier::kMarking, and WriteBarrier::kNone.

GetWriteBarrierType() [2/2]

static V8_INLINE WriteBarrierType GetWriteBarrierType ( v8::Local< v8::Object > &  wrapper, int  wrapper_index, const void *  wrappable, WriteBarrierParams &  params, HeapHandleCallback  callback  )

inlinestatic

Gets the required write barrier type for a specific write.

Note: Handling for JS to C++ references.

Parameters

wrapper	The wrapper that has been written into.
wrapper_index	The wrapper index in wrapper that has been written into.
wrappable	The value that was written.
params	Parameters that may be used for actual write barrier calls. Only filled if return value indicates that a write barrier is needed. The contents of the params are an implementation detail.
callback	Callback returning the corresponding heap handle. The callback is only invoked if the heap cannot otherwise be figured out. The callback must not allocate.

Returns

whether a write barrier is needed and which barrier to invoke.

Definition at line 206 of file v8-cppgc.h.

---

The documentation for this class was generated from the following file:

• include/v8-cppgc.h