static constexpr ReadOptions lazy() { return ReadOptions(1); }
};
-/** HACK, A value from another process
- *
- * This represents a value from another process:
- *
- * * constructor/destructor are disabled;
- *
- * * raw memory copy (std::memcpy) is used to copy Remote<T>;
- *
- * * raw memory comparison is used to compare them;
- *
- * * when T is a trivial type, Remote is convertible to a T.
- *
- * We currently only handle the case where the type has the same layout
- * in the current process and in the target process: we don't handle
- * cross-architecture (such as 32-bit/64-bit access).
- */
-template<class T>
-union Remote {
-private:
- T buffer;
-public:
- Remote() {}
- ~Remote() {}
- Remote(Remote const& that)
- {
- std::memcpy(&buffer, &that.buffer, sizeof(buffer));
- }
- Remote& operator=(Remote const& that)
- {
- std::memcpy(&buffer, &that.buffer, sizeof(buffer));
- return *this;
- }
- T* getBuffer() { return &buffer; }
- const T* getBuffer() const { return &buffer; }
- std::size_t getBufferSize() const { return sizeof(T); }
- operator T() const {
- static_assert(std::is_trivial<T>::value, "Cannot convert non trivial type");
- return buffer;
- }
- void clear()
- {
- std::memset(static_cast<void*>(&buffer), 0, sizeof(T));
- }
-};
-
/** A given state of a given process (abstract base class)
*
* Currently, this might either be:
