Merge pull request #37050 from neikeq/fix-mono-after-vulkan-merge

Fix C# bindings after recent breaking changes

1 files changed, 143 insertions, 0 deletions

diff --git a/modules/mono/managed_callable.cpp b/modules/mono/managed_callable.cpp
new file mode 100644
index 0000000000..75420612fc
--- /dev/null
+++ b/modules/mono/managed_callable.cpp
@@ -0,0 +1,143 @@
+/*************************************************************************/
+/*  managed_callable.cpp                                                 */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#include "managed_callable.h"
+
+#include "csharp_script.h"
+#include "mono_gd/gd_mono_marshal.h"
+#include "mono_gd/gd_mono_utils.h"
+
+#ifdef GD_MONO_HOT_RELOAD
+SelfList<ManagedCallable>::List ManagedCallable::instances;
+Map<ManagedCallable *, Array> ManagedCallable::instances_pending_reload;
+Mutex ManagedCallable::instances_mutex;
+#endif
+
+bool ManagedCallable::compare_equal(const CallableCustom *p_a, const CallableCustom *p_b) {
+	const ManagedCallable *a = static_cast<const ManagedCallable *>(p_a);
+	const ManagedCallable *b = static_cast<const ManagedCallable *>(p_b);
+
+	MonoDelegate *delegate_a = (MonoDelegate *)a->delegate_handle->get_target();
+	MonoDelegate *delegate_b = (MonoDelegate *)b->delegate_handle->get_target();
+
+	if (!delegate_a || !delegate_b) {
+		if (!delegate_a && !delegate_b)
+			return true;
+		return false;
+	}
+
+	// Call Delegate's 'Equals'
+	return GDMonoUtils::mono_delegate_equal(delegate_a, delegate_b);
+}
+
+bool ManagedCallable::compare_less(const CallableCustom *p_a, const CallableCustom *p_b) {
+	if (compare_equal(p_a, p_b))
+		return false;
+	return p_a < p_b;
+}
+
+uint32_t ManagedCallable::hash() const {
+	// hmm
+	uint32_t hash = delegate_invoke->get_name().hash();
+	return hash_djb2_one_64(delegate_handle.ptr()->handle, hash);
+}
+
+String ManagedCallable::get_as_text() const {
+	return "Delegate::Invoke";
+}
+
+CallableCustom::CompareEqualFunc ManagedCallable::get_compare_equal_func() const {
+	return compare_equal_func_ptr;
+}
+
+CallableCustom::CompareLessFunc ManagedCallable::get_compare_less_func() const {
+	return compare_less_func_ptr;
+}
+
+ObjectID ManagedCallable::get_object() const {
+	return CSharpLanguage::get_singleton()->get_managed_callable_middleman()->get_instance_id();
+}
+
+void ManagedCallable::call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const {
+	r_call_error.error = Callable::CallError::CALL_ERROR_INVALID_METHOD; // Can't find anything better
+	r_return_value = Variant();
+
+#ifdef GD_MONO_HOT_RELOAD
+	// Lost during hot-reload
+	ERR_FAIL_NULL(delegate_invoke);
+	ERR_FAIL_COND(delegate_handle.is_null());
+#endif
+
+	ERR_FAIL_COND(delegate_invoke->get_parameters_count() < p_argcount);
+
+	MonoObject *delegate = delegate_handle->get_target();
+
+	MonoException *exc = NULL;
+	MonoObject *ret = delegate_invoke->invoke(delegate, p_arguments, &exc);
+
+	if (exc) {
+		GDMonoUtils::set_pending_exception(exc);
+	} else {
+		r_return_value = GDMonoMarshal::mono_object_to_variant(ret);
+		r_call_error.error = Callable::CallError::CALL_OK;
+	}
+}
+
+void ManagedCallable::set_delegate(MonoDelegate *p_delegate) {
+	delegate_handle = MonoGCHandle::create_strong((MonoObject *)p_delegate);
+	MonoMethod *delegate_invoke_raw = mono_get_delegate_invoke(mono_object_get_class((MonoObject *)p_delegate));
+	const StringName &delegate_invoke_name = CSharpLanguage::get_singleton()->get_string_names().delegate_invoke_method_name;
+	delegate_invoke = memnew(GDMonoMethod(delegate_invoke_name, delegate_invoke_raw)); // TODO: Use pooling for this GDMonoMethod instances
+}
+
+ManagedCallable::ManagedCallable(MonoDelegate *p_delegate) {
+#ifdef DEBUG_ENABLED
+	CRASH_COND(p_delegate == NULL);
+#endif
+
+	set_delegate(p_delegate);
+
+#ifdef GD_MONO_HOT_RELOAD
+	{
+		MutexLock lock(instances_mutex);
+		instances.add(&self_instance);
+	}
+#endif
+}
+
+#ifdef GD_MONO_HOT_RELOAD
+ManagedCallable::~ManagedCallable() {
+	{
+		MutexLock lock(instances_mutex);
+		instances.remove(&self_instance);
+		instances_pending_reload.erase(this);
+	}
+}
+#endif