godot/core/event_queue.cpp
2016-03-09 00:00:52 +01:00

162 lines
4.9 KiB
C++

/*************************************************************************/
/* event_queue.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
/* */
/* 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 "event_queue.h"
Error EventQueue::push_call(uint32_t p_instance_ID, const StringName& p_method, VARIANT_ARG_DECLARE) {
uint8_t room_needed=sizeof(Event);
int args=0;
if (p_arg5.get_type()!=Variant::NIL)
args=5;
else if (p_arg4.get_type()!=Variant::NIL)
args=4;
else if (p_arg3.get_type()!=Variant::NIL)
args=3;
else if (p_arg2.get_type()!=Variant::NIL)
args=2;
else if (p_arg1.get_type()!=Variant::NIL)
args=1;
else
args=0;
room_needed+=sizeof(Variant)*args;
ERR_FAIL_COND_V( (buffer_end+room_needed) >= buffer_size , ERR_OUT_OF_MEMORY );
Event * ev = memnew_placement( &event_buffer[ buffer_end ], Event );
ev->args=args;
ev->instance_ID=p_instance_ID;
ev->method=p_method;
buffer_end+=sizeof(Event);
if (args>=1) {
Variant * v = memnew_placement( &event_buffer[ buffer_end ], Variant );
buffer_end+=sizeof(Variant);
*v=p_arg1;
}
if (args>=2) {
Variant * v = memnew_placement( &event_buffer[ buffer_end ], Variant );
buffer_end+=sizeof(Variant);
*v=p_arg2;
}
if (args>=3) {
Variant * v = memnew_placement( &event_buffer[ buffer_end ], Variant );
buffer_end+=sizeof(Variant);
*v=p_arg3;
}
if (args>=4) {
Variant * v = memnew_placement( &event_buffer[ buffer_end ], Variant );
buffer_end+=sizeof(Variant);
*v=p_arg4;
}
if (args>=5) {
Variant * v = memnew_placement( &event_buffer[ buffer_end ], Variant );
buffer_end+=sizeof(Variant);
*v=p_arg5;
}
if (buffer_max_used>buffer_end);
buffer_max_used=buffer_end;
return OK;
}
void EventQueue::flush_events() {
uint32_t read_pos=0;
while (read_pos < buffer_end ) {
Event *event = (Event*)&event_buffer[ read_pos ];
Variant *args= (Variant*)(event+1);
Object *obj = ObjectDB::get_instance(event->instance_ID);
if (obj) {
// events don't expect a return value
obj->call( event->method,
(event->args>=1) ? args[0] : Variant(),
(event->args>=2) ? args[1] : Variant(),
(event->args>=3) ? args[2] : Variant(),
(event->args>=4) ? args[3] : Variant(),
(event->args>=5) ? args[4] : Variant() );
}
if (event->args>=1) args[0].~Variant();
if (event->args>=2) args[1].~Variant();
if (event->args>=3) args[2].~Variant();
if (event->args>=4) args[3].~Variant();
if (event->args>=5) args[4].~Variant();
event->~Event();
read_pos+=sizeof(Event)+sizeof(Variant)*event->args;
}
buffer_end=0; // reset buffer
}
EventQueue::EventQueue(uint32_t p_buffer_size) {
buffer_end=0;
buffer_max_used=0;
buffer_size=p_buffer_size;
event_buffer = memnew_arr( uint8_t, buffer_size );
}
EventQueue::~EventQueue() {
uint32_t read_pos=0;
while (read_pos < buffer_end ) {
Event *event = (Event*)&event_buffer[ read_pos ];
Variant *args= (Variant*)(event+1);
for (int i=0;i<event->args;i++)
args[i].~Variant();
event->~Event();
read_pos+=sizeof(Event)+sizeof(Variant)*event->args;
}
memdelete_arr(event_buffer);
event_buffer=NULL;
}