ref: 82ff0b70095060015274ae80c8dd66bb55011c26
dir: /src/d_event.c/
// // Copyright(C) 1993-1996 Id Software, Inc. // Copyright(C) 2005-2014 Simon Howard // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // // DESCRIPTION: Event handling. // // Events are asynchronous inputs generally generated by the game user. // Events can be discarded if no responder claims them // #include <stdlib.h> #include "d_event.h" #define MAXEVENTS 64 static event_t events[MAXEVENTS]; static int eventhead; static int eventtail; // // D_PostEvent // Called by the I/O functions when input is detected // void D_PostEvent (event_t* ev) { events[eventhead] = *ev; eventhead = (eventhead + 1) % MAXEVENTS; } // Read an event from the queue. event_t *D_PopEvent(void) { event_t *result; // No more events waiting. if (eventtail == eventhead) { return NULL; } result = &events[eventtail]; // Advance to the next event in the queue. eventtail = (eventtail + 1) % MAXEVENTS; return result; }