#define SIMGRID_MC_REMOTE_PTR_HPP
#include "src/simix/smx_private.hpp"
+#include <type_traits>
namespace simgrid {
namespace mc {
*
* * 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 {
+template <class T> class Remote {
private:
- T buffer;
+ typename std::aligned_storage<sizeof(T), alignof(T)>::type buffer;
public:
- Remote() { /* Nothing to do */}
- ~Remote() { /* Nothing to do */}
- Remote(T const& p) { std::memcpy(static_cast<void*>(&buffer), static_cast<const void*>(&p), sizeof(buffer)); }
- Remote(Remote const& that)
- {
- std::memcpy(static_cast<void*>(&buffer), static_cast<const void*>(&that.buffer), sizeof(buffer));
- }
- Remote& operator=(Remote const& that)
- {
- std::memcpy(static_cast<void*>(&buffer), static_cast<const void*>(&that.buffer), sizeof(buffer));
- return *this;
- }
- T* getBuffer() { return &buffer; }
- const T* getBuffer() const { return &buffer; }
+ Remote() = default;
+ Remote(T const& p) { std::memcpy(&buffer, &p, sizeof buffer); }
+
+ T* getBuffer() { return reinterpret_cast<T*>(&buffer); }
+ const T* getBuffer() const { return reinterpret_cast<const T*>(&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;
+ return *getBuffer();
}
- void clear() { std::memset(static_cast<void*>(&buffer), 0, sizeof(T)); }
+ void clear() { std::memset(&buffer, 0, sizeof buffer); }
};
/** Pointer to a remote address-space (process, snapshot)
