156 lines
5 KiB
C++
156 lines
5 KiB
C++
/*************************************************************************/
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/* event_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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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 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 "event_queue.h"
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Error EventQueue::push_call(uint32_t p_instance_ID, const StringName &p_method, VARIANT_ARG_DECLARE) {
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uint8_t room_needed = sizeof(Event);
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int args = 0;
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if (p_arg5.get_type() != Variant::NIL)
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args = 5;
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else if (p_arg4.get_type() != Variant::NIL)
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args = 4;
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else if (p_arg3.get_type() != Variant::NIL)
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args = 3;
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else if (p_arg2.get_type() != Variant::NIL)
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args = 2;
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else if (p_arg1.get_type() != Variant::NIL)
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args = 1;
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else
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args = 0;
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room_needed += sizeof(Variant) * args;
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ERR_FAIL_COND_V((buffer_end + room_needed) >= buffer_size, ERR_OUT_OF_MEMORY);
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Event *ev = memnew_placement(&event_buffer[buffer_end], Event);
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ev->args = args;
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ev->instance_ID = p_instance_ID;
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ev->method = p_method;
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buffer_end += sizeof(Event);
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if (args >= 1) {
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Variant *v = memnew_placement(&event_buffer[buffer_end], Variant);
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buffer_end += sizeof(Variant);
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*v = p_arg1;
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}
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if (args >= 2) {
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Variant *v = memnew_placement(&event_buffer[buffer_end], Variant);
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buffer_end += sizeof(Variant);
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*v = p_arg2;
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}
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if (args >= 3) {
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Variant *v = memnew_placement(&event_buffer[buffer_end], Variant);
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buffer_end += sizeof(Variant);
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*v = p_arg3;
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}
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if (args >= 4) {
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Variant *v = memnew_placement(&event_buffer[buffer_end], Variant);
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buffer_end += sizeof(Variant);
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*v = p_arg4;
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}
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if (args >= 5) {
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Variant *v = memnew_placement(&event_buffer[buffer_end], Variant);
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buffer_end += sizeof(Variant);
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*v = p_arg5;
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}
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if (buffer_end > buffer_max_used)
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buffer_max_used = buffer_end;
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return OK;
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}
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void EventQueue::flush_events() {
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uint32_t read_pos = 0;
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while (read_pos < buffer_end) {
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Event *event = (Event *)&event_buffer[read_pos];
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Variant *args = (Variant *)(event + 1);
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Object *obj = ObjectDB::get_instance(event->instance_ID);
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if (obj) {
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// events don't expect a return value
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obj->call(event->method,
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(event->args >= 1) ? args[0] : Variant(),
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(event->args >= 2) ? args[1] : Variant(),
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(event->args >= 3) ? args[2] : Variant(),
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(event->args >= 4) ? args[3] : Variant(),
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(event->args >= 5) ? args[4] : Variant());
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}
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if (event->args >= 1) args[0].~Variant();
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if (event->args >= 2) args[1].~Variant();
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if (event->args >= 3) args[2].~Variant();
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if (event->args >= 4) args[3].~Variant();
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if (event->args >= 5) args[4].~Variant();
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event->~Event();
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read_pos += sizeof(Event) + sizeof(Variant) * event->args;
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}
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buffer_end = 0; // reset buffer
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}
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EventQueue::EventQueue(uint32_t p_buffer_size) {
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buffer_end = 0;
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buffer_max_used = 0;
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buffer_size = p_buffer_size;
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event_buffer = memnew_arr(uint8_t, buffer_size);
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}
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EventQueue::~EventQueue() {
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uint32_t read_pos = 0;
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while (read_pos < buffer_end) {
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Event *event = (Event *)&event_buffer[read_pos];
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Variant *args = (Variant *)(event + 1);
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for (int i = 0; i < event->args; i++)
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args[i].~Variant();
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event->~Event();
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read_pos += sizeof(Event) + sizeof(Variant) * event->args;
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}
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memdelete_arr(event_buffer);
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event_buffer = NULL;
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}
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