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-rw-r--r--src/common/CMakeLists.txt1
-rw-r--r--src/common/unique_function.h62
2 files changed, 63 insertions, 0 deletions
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index a6fa9a85d..c05b78cd5 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -188,6 +188,7 @@ add_library(common STATIC
tiny_mt.h
tree.h
uint128.h
+ unique_function.h
uuid.cpp
uuid.h
vector_math.h
diff --git a/src/common/unique_function.h b/src/common/unique_function.h
new file mode 100644
index 000000000..ca0559071
--- /dev/null
+++ b/src/common/unique_function.h
@@ -0,0 +1,62 @@
+// Copyright 2021 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <utility>
+
+namespace Common {
+
+/// General purpose function wrapper similar to std::function.
+/// Unlike std::function, the captured values don't have to be copyable.
+/// This class can be moved but not copied.
+template <typename ResultType, typename... Args>
+class UniqueFunction {
+ class CallableBase {
+ public:
+ virtual ~CallableBase() = default;
+ virtual ResultType operator()(Args&&...) = 0;
+ };
+
+ template <typename Functor>
+ class Callable final : public CallableBase {
+ public:
+ Callable(Functor&& functor_) : functor{std::move(functor_)} {}
+ ~Callable() override = default;
+
+ ResultType operator()(Args&&... args) override {
+ return functor(std::forward<Args>(args)...);
+ }
+
+ private:
+ Functor functor;
+ };
+
+public:
+ UniqueFunction() = default;
+
+ template <typename Functor>
+ UniqueFunction(Functor&& functor)
+ : callable{std::make_unique<Callable<Functor>>(std::move(functor))} {}
+
+ UniqueFunction& operator=(UniqueFunction&& rhs) noexcept = default;
+ UniqueFunction(UniqueFunction&& rhs) noexcept = default;
+
+ UniqueFunction& operator=(const UniqueFunction&) = delete;
+ UniqueFunction(const UniqueFunction&) = delete;
+
+ ResultType operator()(Args&&... args) const {
+ return (*callable)(std::forward<Args>(args)...);
+ }
+
+ explicit operator bool() const noexcept {
+ return static_cast<bool>(callable);
+ }
+
+private:
+ std::unique_ptr<CallableBase> callable;
+};
+
+} // namespace Common