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/* -*- 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
#include "vm/StencilObject.h"
#include "mozilla/Assertions.h" // MOZ_ASSERT
#include "mozilla/PodOperations.h" // mozilla::PodCopy
#include <stddef.h> // size_t
#include <stdint.h> // uint8_t, INT32_MAX
#include "jsapi.h" // JS_NewObject
#include "js/Class.h" // JSClassOps, JSClass, JSCLASS_*
#include "js/ErrorReport.h" // JS_ReportErrorASCII
#include "js/experimental/JSStencil.h" // JS::Stencil, JS::StencilAddRef, JS::StencilRelease
#include "js/RootingAPI.h" // JS::Rooted
#include "js/Utility.h" // js_free
#include "vm/JSContext.h" // JSContext
#include "vm/JSObject.h" // JSObject
using namespace js;
/*static */ const JSClassOps StencilObject::classOps_ = {
nullptr, // addProperty
nullptr, // delProperty
nullptr, // enumerate
nullptr, // newEnumerate
nullptr, // resolve
nullptr, // mayResolve
StencilObject::finalize, // finalize
nullptr, // call
nullptr, // construct
nullptr, // trace
};
/*static */ const JSClass StencilObject::class_ = {
"StencilObject",
JSCLASS_HAS_RESERVED_SLOTS(StencilObject::ReservedSlots) |
JSCLASS_BACKGROUND_FINALIZE,
&StencilObject::classOps_,
};
bool StencilObject::hasStencil() const {
// The stencil may not be present yet if we GC during initialization.
return !getReservedSlot(StencilSlot).isUndefined();
}
JS::Stencil* StencilObject::stencil() const {
void* ptr = getReservedSlot(StencilSlot).toPrivate();
MOZ_ASSERT(ptr);
return static_cast<JS::Stencil*>(ptr);
}
/* static */ StencilObject* StencilObject::create(JSContext* cx,
RefPtr<JS::Stencil> stencil) {
JS::Rooted<JSObject*> obj(cx, JS_NewObject(cx, &class_));
if (!obj) {
return nullptr;
}
obj->as<StencilObject>().setReservedSlot(
StencilSlot, PrivateValue(stencil.forget().take()));
return &obj->as<StencilObject>();
}
/* static */ void StencilObject::finalize(JS::GCContext* gcx, JSObject* obj) {
if (obj->as<StencilObject>().hasStencil()) {
JS::StencilRelease(obj->as<StencilObject>().stencil());
}
}
/*static */ const JSClassOps StencilXDRBufferObject::classOps_ = {
nullptr, // addProperty
nullptr, // delProperty
nullptr, // enumerate
nullptr, // newEnumerate
nullptr, // resolve
nullptr, // mayResolve
StencilXDRBufferObject::finalize, // finalize
nullptr, // call
nullptr, // construct
nullptr, // trace
};
/*static */ const JSClass StencilXDRBufferObject::class_ = {
"StencilXDRBufferObject",
JSCLASS_HAS_RESERVED_SLOTS(StencilXDRBufferObject::ReservedSlots) |
JSCLASS_BACKGROUND_FINALIZE,
&StencilXDRBufferObject::classOps_,
};
bool StencilXDRBufferObject::hasBuffer() const {
// The stencil may not be present yet if we GC during initialization.
return !getReservedSlot(BufferSlot).isUndefined();
}
const uint8_t* StencilXDRBufferObject::buffer() const {
void* ptr = getReservedSlot(BufferSlot).toPrivate();
MOZ_ASSERT(ptr);
return static_cast<const uint8_t*>(ptr);
}
uint8_t* StencilXDRBufferObject::writableBuffer() {
void* ptr = getReservedSlot(BufferSlot).toPrivate();
MOZ_ASSERT(ptr);
return static_cast<uint8_t*>(ptr);
}
size_t StencilXDRBufferObject::bufferLength() const {
return getReservedSlot(LengthSlot).toInt32();
}
/* static */ StencilXDRBufferObject* StencilXDRBufferObject::create(
JSContext* cx, uint8_t* buffer, size_t length) {
if (length >= INT32_MAX) {
JS_ReportErrorASCII(cx, "XDR buffer is too long");
return nullptr;
}
JS::Rooted<JSObject*> obj(cx, JS_NewObject(cx, &class_));
if (!obj) {
return nullptr;
}
auto ownedBuffer = cx->make_pod_array<uint8_t>(length);
if (!ownedBuffer) {
return nullptr;
}
mozilla::PodCopy(ownedBuffer.get(), buffer, length);
obj->as<StencilXDRBufferObject>().setReservedSlot(
BufferSlot, PrivateValue(ownedBuffer.release()));
obj->as<StencilXDRBufferObject>().setReservedSlot(LengthSlot,
Int32Value(length));
return &obj->as<StencilXDRBufferObject>();
}
/* static */ void StencilXDRBufferObject::finalize(JS::GCContext* gcx,
JSObject* obj) {
if (obj->as<StencilXDRBufferObject>().hasBuffer()) {
js_free(obj->as<StencilXDRBufferObject>().writableBuffer());
}
}