16f6a5b139
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see". Backported from #70885.
357 lines
11 KiB
C++
357 lines
11 KiB
C++
/**************************************************************************/
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/* message_queue.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "message_queue.h"
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#include "core/project_settings.h"
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#include "core/script_language.h"
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MessageQueue *MessageQueue::singleton = nullptr;
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MessageQueue *MessageQueue::get_singleton() {
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return singleton;
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}
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Error MessageQueue::push_call(ObjectID p_id, const StringName &p_method, const Variant **p_args, int p_argcount, bool p_show_error) {
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_THREAD_SAFE_METHOD_
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int room_needed = sizeof(Message) + sizeof(Variant) * p_argcount;
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if ((buffer_end + room_needed) >= buffer_size) {
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String type;
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if (ObjectDB::get_instance(p_id)) {
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type = ObjectDB::get_instance(p_id)->get_class();
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}
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print_line("Failed method: " + type + ":" + p_method + " target ID: " + itos(p_id));
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statistics();
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ERR_FAIL_V_MSG(ERR_OUT_OF_MEMORY, "Message queue out of memory. Try increasing 'memory/limits/message_queue/max_size_kb' in project settings.");
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}
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Message *msg = memnew_placement(&buffer[buffer_end], Message);
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msg->args = p_argcount;
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msg->instance_id = p_id;
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msg->target = p_method;
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msg->type = TYPE_CALL;
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if (p_show_error) {
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msg->type |= FLAG_SHOW_ERROR;
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}
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buffer_end += sizeof(Message);
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for (int i = 0; i < p_argcount; i++) {
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Variant *v = memnew_placement(&buffer[buffer_end], Variant);
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buffer_end += sizeof(Variant);
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*v = *p_args[i];
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}
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return OK;
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}
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Error MessageQueue::push_call(ObjectID p_id, const StringName &p_method, VARIANT_ARG_DECLARE) {
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VARIANT_ARGPTRS;
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int argc = 0;
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for (int i = 0; i < VARIANT_ARG_MAX; i++) {
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if (argptr[i]->get_type() == Variant::NIL) {
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break;
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}
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argc++;
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}
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return push_call(p_id, p_method, argptr, argc, false);
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}
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Error MessageQueue::push_set(ObjectID p_id, const StringName &p_prop, const Variant &p_value) {
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_THREAD_SAFE_METHOD_
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uint8_t room_needed = sizeof(Message) + sizeof(Variant);
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if ((buffer_end + room_needed) >= buffer_size) {
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String type;
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if (ObjectDB::get_instance(p_id)) {
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type = ObjectDB::get_instance(p_id)->get_class();
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}
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print_line("Failed set: " + type + ":" + p_prop + " target ID: " + itos(p_id));
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statistics();
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ERR_FAIL_V_MSG(ERR_OUT_OF_MEMORY, "Message queue out of memory. Try increasing 'memory/limits/message_queue/max_size_kb' in project settings.");
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}
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Message *msg = memnew_placement(&buffer[buffer_end], Message);
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msg->args = 1;
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msg->instance_id = p_id;
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msg->target = p_prop;
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msg->type = TYPE_SET;
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buffer_end += sizeof(Message);
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Variant *v = memnew_placement(&buffer[buffer_end], Variant);
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buffer_end += sizeof(Variant);
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*v = p_value;
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return OK;
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}
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Error MessageQueue::push_notification(ObjectID p_id, int p_notification) {
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_THREAD_SAFE_METHOD_
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ERR_FAIL_COND_V(p_notification < 0, ERR_INVALID_PARAMETER);
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uint8_t room_needed = sizeof(Message);
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if ((buffer_end + room_needed) >= buffer_size) {
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print_line("Failed notification: " + itos(p_notification) + " target ID: " + itos(p_id));
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statistics();
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ERR_FAIL_V_MSG(ERR_OUT_OF_MEMORY, "Message queue out of memory. Try increasing 'memory/limits/message_queue/max_size_kb' in project settings.");
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}
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Message *msg = memnew_placement(&buffer[buffer_end], Message);
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msg->type = TYPE_NOTIFICATION;
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msg->instance_id = p_id;
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//msg->target;
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msg->notification = p_notification;
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buffer_end += sizeof(Message);
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return OK;
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}
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Error MessageQueue::push_call(Object *p_object, const StringName &p_method, VARIANT_ARG_DECLARE) {
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return push_call(p_object->get_instance_id(), p_method, VARIANT_ARG_PASS);
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}
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Error MessageQueue::push_notification(Object *p_object, int p_notification) {
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return push_notification(p_object->get_instance_id(), p_notification);
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}
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Error MessageQueue::push_set(Object *p_object, const StringName &p_prop, const Variant &p_value) {
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return push_set(p_object->get_instance_id(), p_prop, p_value);
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}
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void MessageQueue::statistics() {
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Map<StringName, int> set_count;
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Map<int, int> notify_count;
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Map<StringName, int> call_count;
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int null_count = 0;
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uint32_t read_pos = 0;
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while (read_pos < buffer_end) {
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Message *message = (Message *)&buffer[read_pos];
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Object *target = ObjectDB::get_instance(message->instance_id);
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if (target != nullptr) {
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switch (message->type & FLAG_MASK) {
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case TYPE_CALL: {
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if (!call_count.has(message->target)) {
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call_count[message->target] = 0;
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}
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call_count[message->target]++;
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} break;
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case TYPE_NOTIFICATION: {
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if (!notify_count.has(message->notification)) {
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notify_count[message->notification] = 0;
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}
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notify_count[message->notification]++;
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} break;
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case TYPE_SET: {
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if (!set_count.has(message->target)) {
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set_count[message->target] = 0;
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}
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set_count[message->target]++;
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} break;
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}
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} else {
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//object was deleted
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print_line("Object was deleted while awaiting a callback");
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null_count++;
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}
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read_pos += sizeof(Message);
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if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION) {
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read_pos += sizeof(Variant) * message->args;
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}
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}
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print_line("TOTAL BYTES: " + itos(buffer_end));
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print_line("NULL count: " + itos(null_count));
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for (Map<StringName, int>::Element *E = set_count.front(); E; E = E->next()) {
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print_line("SET " + E->key() + ": " + itos(E->get()));
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}
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for (Map<StringName, int>::Element *E = call_count.front(); E; E = E->next()) {
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print_line("CALL " + E->key() + ": " + itos(E->get()));
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}
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for (Map<int, int>::Element *E = notify_count.front(); E; E = E->next()) {
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print_line("NOTIFY " + itos(E->key()) + ": " + itos(E->get()));
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}
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}
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int MessageQueue::get_max_buffer_usage() const {
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return buffer_max_used;
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}
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void MessageQueue::_call_function(Object *p_target, const StringName &p_func, const Variant *p_args, int p_argcount, bool p_show_error) {
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const Variant **argptrs = nullptr;
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if (p_argcount) {
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argptrs = (const Variant **)alloca(sizeof(Variant *) * p_argcount);
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for (int i = 0; i < p_argcount; i++) {
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argptrs[i] = &p_args[i];
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}
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}
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Variant::CallError ce;
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p_target->call(p_func, argptrs, p_argcount, ce);
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if (p_show_error && ce.error != Variant::CallError::CALL_OK) {
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ERR_PRINT("Error calling deferred method: " + Variant::get_call_error_text(p_target, p_func, argptrs, p_argcount, ce) + ".");
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}
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}
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void MessageQueue::flush() {
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if (buffer_end > buffer_max_used) {
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buffer_max_used = buffer_end;
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}
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uint32_t read_pos = 0;
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//using reverse locking strategy
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_THREAD_SAFE_LOCK_
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ERR_FAIL_COND(flushing); //already flushing, you did something odd
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flushing = true;
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while (read_pos < buffer_end) {
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//lock on each iteration, so a call can re-add itself to the message queue
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Message *message = (Message *)&buffer[read_pos];
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uint32_t advance = sizeof(Message);
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if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION) {
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advance += sizeof(Variant) * message->args;
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}
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//pre-advance so this function is reentrant
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read_pos += advance;
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_THREAD_SAFE_UNLOCK_
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Object *target = ObjectDB::get_instance(message->instance_id);
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if (target != nullptr) {
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switch (message->type & FLAG_MASK) {
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case TYPE_CALL: {
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Variant *args = (Variant *)(message + 1);
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// messages don't expect a return value
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_call_function(target, message->target, args, message->args, message->type & FLAG_SHOW_ERROR);
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} break;
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case TYPE_NOTIFICATION: {
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// messages don't expect a return value
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target->notification(message->notification);
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} break;
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case TYPE_SET: {
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Variant *arg = (Variant *)(message + 1);
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// messages don't expect a return value
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target->set(message->target, *arg);
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} break;
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}
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}
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if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION) {
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Variant *args = (Variant *)(message + 1);
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for (int i = 0; i < message->args; i++) {
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args[i].~Variant();
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}
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}
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message->~Message();
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_THREAD_SAFE_LOCK_
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}
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buffer_end = 0; // reset buffer
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flushing = false;
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_THREAD_SAFE_UNLOCK_
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}
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bool MessageQueue::is_flushing() const {
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return flushing;
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}
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MessageQueue::MessageQueue() {
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ERR_FAIL_COND_MSG(singleton != nullptr, "A MessageQueue singleton already exists.");
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singleton = this;
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flushing = false;
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buffer_end = 0;
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buffer_max_used = 0;
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buffer_size = GLOBAL_DEF_RST("memory/limits/message_queue/max_size_kb", DEFAULT_QUEUE_SIZE_KB);
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ProjectSettings::get_singleton()->set_custom_property_info("memory/limits/message_queue/max_size_kb", PropertyInfo(Variant::INT, "memory/limits/message_queue/max_size_kb", PROPERTY_HINT_RANGE, "1024,4096,1,or_greater"));
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buffer_size *= 1024;
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buffer = memnew_arr(uint8_t, buffer_size);
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}
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MessageQueue::~MessageQueue() {
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uint32_t read_pos = 0;
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while (read_pos < buffer_end) {
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Message *message = (Message *)&buffer[read_pos];
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Variant *args = (Variant *)(message + 1);
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int argc = message->args;
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if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION) {
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for (int i = 0; i < argc; i++) {
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args[i].~Variant();
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}
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}
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message->~Message();
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read_pos += sizeof(Message);
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if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION) {
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read_pos += sizeof(Variant) * message->args;
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}
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}
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singleton = nullptr;
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memdelete_arr(buffer);
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}
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