--- /dev/null
+/* Copyright (c) 2008-2015. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#ifndef SIMGRID_MC_REMOTE_PTR_HPP
+#define SIMGRID_MC_REMOTE_PTR_HPP
+
+#include <cstdint>
+
+namespace simgrid {
+namespace mc {
+
+/** Pointer to a remote address-space (process, snapshot)
+ *
+ * With this we can clearly identify the expected type of an address in the
+ * remote process while avoiding to use native local pointers.
+ *
+ * Some operators (+/-) assume use the size of the underlying element. This
+ * only works if the target applications is using the same target: it won't
+ * work for example, when inspecting a 32 bit application from a 64 bit
+ * model-checker.
+ *
+ * We do not actually store the target address space because we can
+ * always detect it in context. This way `RemotePtr` is as efficient
+ * as a `uint64_t`.
+ */
+template<class T> class RemotePtr {
+ std::uint64_t address_;
+public:
+ RemotePtr() : address_(0) {}
+ RemotePtr(std::uint64_t address) : address_(address) {}
+ RemotePtr(T* address) : address_((std::uintptr_t)address) {}
+ std::uint64_t address() const { return address_; }
+
+ operator bool() const
+ {
+ return address_;
+ }
+ bool operator!() const
+ {
+ return !address_;
+ }
+ operator RemotePtr<void>() const
+ {
+ return RemotePtr<void>(address_);
+ }
+ RemotePtr<T> operator+(std::uint64_t n) const
+ {
+ return RemotePtr<T>(address_ + n * sizeof(T));
+ }
+ RemotePtr<T> operator-(std::uint64_t n) const
+ {
+ return RemotePtr<T>(address_ - n * sizeof(T));
+ }
+ RemotePtr<T>& operator+=(std::uint64_t n)
+ {
+ address_ += n * sizeof(T);
+ return *this;
+ }
+ RemotePtr<T>& operator-=(std::uint64_t n)
+ {
+ address_ -= n * sizeof(T);
+ return *this;
+ }
+};
+
+template<class X, class Y>
+bool operator<(RemotePtr<X> const& x, RemotePtr<Y> const& y)
+{
+ return x.address() < y.address();
+}
+
+template<class X, class Y>
+bool operator>(RemotePtr<X> const& x, RemotePtr<Y> const& y)
+{
+ return x.address() > y.address();
+}
+
+template<class X, class Y>
+bool operator>=(RemotePtr<X> const& x, RemotePtr<Y> const& y)
+{
+ return x.address() >= y.address();
+}
+
+template<class X, class Y>
+bool operator<=(RemotePtr<X> const& x, RemotePtr<Y> const& y)
+{
+ return x.address() <= y.address();
+}
+
+template<class X, class Y>
+bool operator==(RemotePtr<X> const& x, RemotePtr<Y> const& y)
+{
+ return x.address() == y.address();
+}
+
+template<class X, class Y>
+bool operator!=(RemotePtr<X> const& x, RemotePtr<Y> const& y)
+{
+ return x.address() != y.address();
+}
+
+template<class T> inline
+RemotePtr<T> remote(T *p)
+{
+ return RemotePtr<T>(p);
+}
+
+template<class T=void> inline
+RemotePtr<T> remote(uint64_t p)
+{
+ return RemotePtr<T>(p);
+}
+
+}
+}
+
+#endif
