arkcompiler_ets_runtime/ecmascript/js_arraybuffer.cpp
2023-07-20 16:48:27 +08:00

81 lines
3.3 KiB
C++

/*
* Copyright (c) 2021 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ecmascript/js_arraybuffer.h"
#include "ecmascript/base/builtins_base.h"
#include "ecmascript/ecma_macros.h"
#include "ecmascript/ecma_vm.h"
#include "ecmascript/mem/barriers-inl.h"
#include "ecmascript/object_factory.h"
#include "ecmascript/platform/os.h"
#include "ecmascript/tagged_array.h"
#include "securec.h"
namespace panda::ecmascript {
void JSArrayBuffer::CopyDataBlockBytes(JSTaggedValue toBlock, JSTaggedValue fromBlock, int32_t fromIndex, int32_t count)
{
void *fromBuf = JSNativePointer::Cast(fromBlock.GetTaggedObject())->GetExternalPointer();
void *toBuf = JSNativePointer::Cast(toBlock.GetTaggedObject())->GetExternalPointer();
CopyDataPointBytes(toBuf, fromBuf, fromIndex, count);
}
void JSArrayBuffer::CopyDataPointBytes(void *toBuf, void *fromBuf, int32_t fromIndex, int32_t count)
{
auto *from = static_cast<uint8_t *>(fromBuf);
auto *to = static_cast<uint8_t *>(toBuf);
if (memcpy_s(to, count, from + fromIndex, count) != EOK) { // NOLINT
LOG_FULL(FATAL) << "memcpy_s failed";
UNREACHABLE();
}
}
void JSArrayBuffer::Attach(JSThread *thread, uint32_t arrayBufferByteLength,
JSTaggedValue arrayBufferData, bool transferWithNativeAreaAllocator)
{
ASSERT(arrayBufferData.IsJSNativePointer());
// only in transition, should the JSArrayBuffer with NativeAreaAllocator increase mem usage
if (transferWithNativeAreaAllocator) {
LOG_FULL(DEBUG) << "attaching for transfer";
JSHandle<JSNativePointer> np(thread, arrayBufferData.GetTaggedObject());
NativeAreaAllocator *allocator = thread->GetEcmaVM()->GetNativeAreaAllocator();
allocator->IncreaseNativeMemoryUsage(MallocUsableSize(np->GetExternalPointer()));
np->SetData(allocator);
}
SetArrayBufferByteLength(arrayBufferByteLength);
SetArrayBufferData(thread, arrayBufferData);
}
void JSArrayBuffer::Detach(JSThread *thread, bool transferWithNativeAreaAllocator)
{
JSTaggedValue arrayBufferData = GetArrayBufferData();
// already detached.
if (arrayBufferData.IsNull()) {
return;
}
// only in transition, should the JSArrayBuffer with NativeAreaAllocator decrease mem usage
if (transferWithNativeAreaAllocator) {
LOG_FULL(DEBUG) << "detaching for transfer";
JSHandle<JSNativePointer> np(thread, arrayBufferData.GetTaggedObject());
NativeAreaAllocator *allocator = thread->GetEcmaVM()->GetNativeAreaAllocator();
allocator->DecreaseNativeMemoryUsage(MallocUsableSize(np->GetExternalPointer()));
np->SetData(nullptr);
}
SetArrayBufferData(thread, JSTaggedValue::Null());
SetArrayBufferByteLength(0);
}
} // namespace panda::ecmascript