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/* -*- Mode: C++; tab-width: 8; 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 gc_Nursery_inl_h
#define gc_Nursery_inl_h
#include "gc/Nursery.h"
#include "jscntxt.h"
#include "gc/Heap.h"
#include "gc/Zone.h"
#include "js/TracingAPI.h"
#include "vm/Runtime.h"
MOZ_ALWAYS_INLINE bool
js::Nursery::getForwardedPointer(JSObject** ref) const
{
MOZ_ASSERT(ref);
MOZ_ASSERT(isInside((void*)*ref));
const gc::RelocationOverlay* overlay = reinterpret_cast<const gc::RelocationOverlay*>(*ref);
if (!overlay->isForwarded())
return false;
*ref = static_cast<JSObject*>(overlay->forwardingAddress());
return true;
}
namespace js {
// The allocation methods below will not run the garbage collector. If the
// nursery cannot accomodate the allocation, the malloc heap will be used
// instead.
template <typename T>
static inline T*
AllocateObjectBuffer(ExclusiveContext* cx, uint32_t count)
{
if (cx->isJSContext()) {
Nursery& nursery = cx->asJSContext()->runtime()->gc.nursery;
size_t nbytes = JS_ROUNDUP(count * sizeof(T), sizeof(Value));
T* buffer = static_cast<T*>(nursery.allocateBuffer(cx->zone(), nbytes));
if (!buffer)
ReportOutOfMemory(cx);
return buffer;
}
return cx->zone()->pod_malloc<T>(count);
}
template <typename T>
static inline T*
AllocateObjectBuffer(ExclusiveContext* cx, JSObject* obj, uint32_t count)
{
if (cx->isJSContext()) {
Nursery& nursery = cx->asJSContext()->runtime()->gc.nursery;
size_t nbytes = JS_ROUNDUP(count * sizeof(T), sizeof(Value));
T* buffer = static_cast<T*>(nursery.allocateBuffer(obj, nbytes));
if (!buffer)
ReportOutOfMemory(cx);
return buffer;
}
return obj->zone()->pod_malloc<T>(count);
}
// If this returns null then the old buffer will be left alone.
template <typename T>
static inline T*
ReallocateObjectBuffer(ExclusiveContext* cx, JSObject* obj, T* oldBuffer,
uint32_t oldCount, uint32_t newCount)
{
if (cx->isJSContext()) {
Nursery& nursery = cx->asJSContext()->runtime()->gc.nursery;
T* buffer = static_cast<T*>(nursery.reallocateBuffer(obj, oldBuffer,
oldCount * sizeof(T),
newCount * sizeof(T)));
if (!buffer)
ReportOutOfMemory(cx);
return buffer;
}
return obj->zone()->pod_realloc<T>(oldBuffer, oldCount, newCount);
}
} // namespace js
#endif /* gc_Nursery_inl_h */
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