Plugin interfaces (plugins v4) (#615)v1.23.1-rc2v1.23.1-rc1v1.23.1v1.23.0-rc2v1.23.0-rc1v1.23.01.23.X

Replaces the current plugin api with source interfaces.

- backwards compatible
- no more json in binaries (wtf)
- does not rely on structs from third party libraries (wtf)
- actually initializes variables
- no more basically unused classes

The launcher exposes almost everything required by plugins in interfaces that allow for backwards compatibility.
The only thing that's passed to a plugin directly is the northstar dll HWND and a struct of data that's different for each plugin.

1 files changed, 39 insertions, 0 deletions

diff --git a/primedev/plugins/interfaces/interface.h b/primedev/plugins/interfaces/interface.h
new file mode 100644
index 00000000..440db5b2
--- /dev/null
+++ b/primedev/plugins/interfaces/interface.h
@@ -0,0 +1,39 @@
+#ifndef INTERFACE_H
+#define INTERFACE_H
+
+typedef void* (*InstantiateInterfaceFn)();
+
+// Used internally to register classes.
+class InterfaceReg
+{
+public:
+	InterfaceReg(InstantiateInterfaceFn fn, const char* pName);
+
+	InstantiateInterfaceFn m_CreateFn;
+	const char* m_pName;
+	InterfaceReg* m_pNext;
+};
+
+// Use this to expose an interface that can have multiple instances.
+#define EXPOSE_INTERFACE(className, interfaceName, versionName)                                                                            \
+	static void* __Create##className##_interface()                                                                                         \
+	{                                                                                                                                      \
+		return static_cast<interfaceName*>(new className);                                                                                 \
+	}                                                                                                                                      \
+	static InterfaceReg __g_Create##className##_reg(__Create##className##_interface, versionName);
+
+#define EXPOSE_SINGLE_INTERFACE_GLOBALVAR(className, interfaceName, versionName, globalVarName)                                            \
+	static void* __Create##className##interfaceName##_interface()                                                                          \
+	{                                                                                                                                      \
+		return static_cast<interfaceName*>(&globalVarName);                                                                                \
+	}                                                                                                                                      \
+	static InterfaceReg __g_Create##className##interfaceName##_reg(__Create##className##interfaceName##_interface, versionName);
+
+// Use this to expose a singleton interface. This creates the global variable for you automatically.
+#define EXPOSE_SINGLE_INTERFACE(className, interfaceName, versionName)                                                                     \
+	static className __g_##className##_singleton;                                                                                          \
+	EXPOSE_SINGLE_INTERFACE_GLOBALVAR(className, interfaceName, versionName, __g_##className##_singleton)
+
+EXPORT void* CreateInterface(const char* pName, InterfaceStatus* pReturnCode);
+
+#endif