godot/core/extension/gdextension_function_loader.cpp

/**************************************************************************/
/*  gdextension_function_loader.cpp                                       */
/**************************************************************************/
/*                         This file is part of:                          */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#include "gdextension_function_loader.h"

#include "gdextension.h"

Error GDExtensionFunctionLoader::open_library(const String &p_path) {
	ERR_FAIL_COND_V_MSG(!p_path.begins_with("libgodot://"), ERR_FILE_NOT_FOUND, "Function based GDExtensions should have a path starting with libgodot://");
	ERR_FAIL_COND_V_MSG(!initialization_function, ERR_DOES_NOT_EXIST, "Initialization function is required for function based GDExtensions.");

	library_path = p_path;

	return OK;
}

Error GDExtensionFunctionLoader::initialize(GDExtensionInterfaceGetProcAddress p_get_proc_address, const Ref<GDExtension> &p_extension, GDExtensionInitialization *r_initialization) {
	ERR_FAIL_COND_V_MSG(!initialization_function, ERR_DOES_NOT_EXIST, "Initialization function is required for function based GDExtensions.");
	GDExtensionBool ret = initialization_function(p_get_proc_address, p_extension.ptr(), r_initialization);

	if (ret) {
		return OK;
	} else {
		ERR_FAIL_V_MSG(FAILED, "GDExtension initialization function for '" + library_path + "' returned an error.");
	}
}

void GDExtensionFunctionLoader::close_library() {
	initialization_function = nullptr;
	library_path.clear();
}

bool GDExtensionFunctionLoader::is_library_open() const {
	return !library_path.is_empty();
}

bool GDExtensionFunctionLoader::has_library_changed() const {
	return false;
}

bool GDExtensionFunctionLoader::library_exists() const {
	return true;
}

void GDExtensionFunctionLoader::set_initialization_function(GDExtensionInitializationFunction p_initialization_function) {
	initialization_function = p_initialization_function;
}