1 files changed, 72 insertions, 0 deletions
diff --git a/src/d_event.c b/src/d_event.c
new file mode 100644
index 00000000..a6faa85d
--- /dev/null
+++ b/src/d_event.c
@@ -0,0 +1,72 @@
+// Emacs style mode select   -*- C++ -*- 
+//-----------------------------------------------------------------------------
+//
+// Copyright(C) 1993-1996 Id Software, Inc.
+// Copyright(C) 2005 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.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+// 02111-1307, USA.
+//
+//-----------------------------------------------------------------------------
+//
+// 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;
+}
+
+