Create location simulation example in cpp

cpp/include/idevice++/readwrite.hpp

@@ -0,0 +1,45 @@
+// Jackson Coxson
+
+#pragma once
+
+#include <idevice++/bindings.hpp>
+
+namespace IdeviceFFI {
+
+// A move-only holder for a fat-pointer stream. It does NOT free on destruction.
+// Always pass ownership to an FFI that consumes it by calling release().
+class ReadWrite {
+  public:
+    ReadWrite() noexcept : ptr_(nullptr) {}
+    explicit ReadWrite(ReadWriteOpaque* p) noexcept : ptr_(p) {}
+
+    ReadWrite(const ReadWrite&)            = delete;
+    ReadWrite& operator=(const ReadWrite&) = delete;
+
+    ReadWrite(ReadWrite&& other) noexcept : ptr_(other.ptr_) { other.ptr_ = nullptr; }
+    ReadWrite& operator=(ReadWrite&& other) noexcept {
+        if (this != &other) {
+            ptr_       = other.ptr_;
+            other.ptr_ = nullptr;
+        }
+        return *this;
+    }
+
+    ~ReadWrite() noexcept = default; // no dtor – Rust consumers own free/drop
+
+    ReadWriteOpaque* raw() const noexcept { return ptr_; }
+    ReadWriteOpaque* release() noexcept {
+        auto* p = ptr_;
+        ptr_    = nullptr;
+        return p;
+    }
+
+    static ReadWrite adopt(ReadWriteOpaque* p) noexcept { return ReadWrite(p); }
+
+    explicit         operator bool() const noexcept { return ptr_ != nullptr; }
+
+  private:
+    ReadWriteOpaque* ptr_;
+};
+
+} // namespace IdeviceFFI