我围绕 Google V8 引擎实现了一个包装器。我写了一个类:
class Es
{
public:
Es();
~Es();
int Init(const char* exec_path);
int CreateContext(uint& id);
int RemoveContext(const uint id);
protected:
Global<Context> global_context;
std::map<uint, Persistent<Context>*> contexts;
Isolate* isolate = nullptr;
private:
uint next_id = 1;
};
我想创建上下文,将它们保存在上下文变量中,并在某一天删除它们。因此,我启动了 V8 引擎:
int Es::Init(const char* exec_path)
{
v8::V8::InitializeICUDefaultLocation(exec_path);
v8::V8::InitializeExternalStartupData(exec_path);
std::unique_ptr<Platform> platform = platform::NewDefaultPlatform();
V8::InitializePlatform(platform.get());
V8::Initialize();
Isolate::CreateParams create_params;
create_params.array_buffer_allocator = ArrayBuffer::Allocator::NewDefaultAllocator();
isolate = Isolate::New(create_params);
if (!isolate)
return InitError;
return Success;
}
之后我想创建一个上下文,使用 int Es::CreateContext(uint& id)。它在 Init 之后调用。
int EasyProspect::CreateContext(uint& id)
{
if (!isolate)
return NotInitializedError;
Isolate::Scope isolate_scope(isolate);
HandleScope handle_scope(isolate);
Local<Context> local_context = Context::New(isolate);
Persistent<Context> context(isolate, local_context);
contexts.emplace(id, &context);
return Success;
}
但我不能这样做,代码在 Context::New(isolate) 上崩溃。为什么?隔离不为空,我进入本地范围...