GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: allocated_buffer-inl.h Lines: 56 56 100.0 %
Date: 2021-09-19 04:12:45 Branches: 14 20 70.0 %

Line Branch Exec Source
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#ifndef SRC_ALLOCATED_BUFFER_INL_H_
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#define SRC_ALLOCATED_BUFFER_INL_H_
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#include "allocated_buffer.h"
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#include "base_object-inl.h"
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#include "node_buffer.h"
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#include "env-inl.h"
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#include "uv.h"
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#include "v8.h"
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#include "util-inl.h"
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#include "node_internals.h"
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namespace node {
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// It's a bit awkward to define this Buffer::New() overload here, but it
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// avoids a circular dependency with node_internals.h.
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namespace Buffer {
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v8::MaybeLocal<v8::Uint8Array> New(Environment* env,
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                                   v8::Local<v8::ArrayBuffer> ab,
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                                   size_t byte_offset,
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                                   size_t length);
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}
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NoArrayBufferZeroFillScope::NoArrayBufferZeroFillScope(
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    IsolateData* isolate_data)
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  : node_allocator_(isolate_data->node_allocator()) {
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  if (node_allocator_ != nullptr) node_allocator_->zero_fill_field()[0] = 0;
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}
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NoArrayBufferZeroFillScope::~NoArrayBufferZeroFillScope() {
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  if (node_allocator_ != nullptr) node_allocator_->zero_fill_field()[0] = 1;
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}
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AllocatedBuffer AllocatedBuffer::AllocateManaged(
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    Environment* env,
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    size_t size) {
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  NoArrayBufferZeroFillScope no_zero_fill_scope(env->isolate_data());
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  std::unique_ptr<v8::BackingStore> bs =
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      v8::ArrayBuffer::NewBackingStore(env->isolate(), size);
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  return AllocatedBuffer(env, std::move(bs));
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}
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AllocatedBuffer::AllocatedBuffer(
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    Environment* env, std::unique_ptr<v8::BackingStore> bs)
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    : env_(env), backing_store_(std::move(bs)) {}
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AllocatedBuffer::AllocatedBuffer(
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    Environment* env, uv_buf_t buffer)
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    : env_(env) {
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  if (buffer.base == nullptr) return;
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  auto map = env->released_allocated_buffers();
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  auto it = map->find(buffer.base);
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  CHECK_NE(it, map->end());
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  backing_store_ = std::move(it->second);
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  map->erase(it);
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}
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void AllocatedBuffer::Resize(size_t len) {
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  if (len == 0) {
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    backing_store_ = v8::ArrayBuffer::NewBackingStore(env_->isolate(), 0);
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    return;
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  }
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  NoArrayBufferZeroFillScope no_zero_fill_scope(env_->isolate_data());
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  backing_store_ = v8::BackingStore::Reallocate(
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      env_->isolate(), std::move(backing_store_), len);
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}
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uv_buf_t AllocatedBuffer::release() {
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  if (data() == nullptr) return uv_buf_init(nullptr, 0);
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  CHECK_NOT_NULL(env_);
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  uv_buf_t ret = uv_buf_init(data(), size());
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  env_->released_allocated_buffers()->emplace(
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      ret.base, std::move(backing_store_));
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  return ret;
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}
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char* AllocatedBuffer::data() {
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  if (!backing_store_) return nullptr;
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  return static_cast<char*>(backing_store_->Data());
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}
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const char* AllocatedBuffer::data() const {
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  if (!backing_store_) return nullptr;
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  return static_cast<char*>(backing_store_->Data());
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}
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size_t AllocatedBuffer::size() const {
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  if (!backing_store_) return 0;
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  return backing_store_->ByteLength();
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}
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void AllocatedBuffer::clear() {
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  backing_store_.reset();
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}
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v8::MaybeLocal<v8::Object> AllocatedBuffer::ToBuffer() {
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  v8::Local<v8::ArrayBuffer> ab = ToArrayBuffer();
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  return Buffer::New(env_, ab, 0, ab->ByteLength())
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      .FromMaybe(v8::Local<v8::Uint8Array>());
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}
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v8::Local<v8::ArrayBuffer> AllocatedBuffer::ToArrayBuffer() {
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  return v8::ArrayBuffer::New(env_->isolate(), std::move(backing_store_));
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}
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}  // namespace node
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#endif  // SRC_ALLOCATED_BUFFER_INL_H_