Source code

Revision control

Other Tools

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* 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 gc_DeletePolicy_h
#define gc_DeletePolicy_h
#include "gc/ClearEdgesTracer.h"
namespace js {
/*
* Provides a delete policy that can be used for objects which have their
* lifetime managed by the GC so they can be safely destroyed outside of GC.
*
* This is necessary for example when initializing such an object may fail after
* the initial allocation. The partially-initialized object must be destroyed,
* but it may not be safe to do so at the current time as the store buffer may
* contain pointers into it.
*
* This policy traces GC pointers in the object and clears them, making sure to
* trigger barriers while doing so. This will remove any store buffer pointers
* into the object and make it safe to delete.
*/
template <typename T>
struct GCManagedDeletePolicy {
void operator()(const T* constPtr) {
if (constPtr) {
auto ptr = const_cast<T*>(constPtr);
gc::ClearEdgesTracer trc;
ptr->trace(&trc);
js_delete(ptr);
}
}
};
} // namespace js
#endif // gc_DeletePolicy_h