From 59818a253ddb27d5bd5dc26f7eb71a7f73a02342 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop+git@gmail.com>
Date: Wed, 14 Oct 2009 01:27:54 +0000
Subject: [PATCH] processing events in the engine thread

git-svn-id: svn://anubis/anaglym/trunk@80 99a6e188-d820-4881-8870-2d33a10e2619
---
 anaglym.cc | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/anaglym.cc b/anaglym.cc
index 21f831f..c9ef4ee 100644
--- a/anaglym.cc
+++ b/anaglym.cc
@@ -22,7 +22,7 @@ static void update();
 static void addEvent(const Event & event);
 static Uint32 updateCallback(Uint32 interval, void * param);
 
-static bool lastDrawCompleted;
+static bool lastUpdateCompleted;
 static bool engine_running;
 static SDL_Event userEvent;
 static SDL_cond * event_condition;
@@ -46,6 +46,31 @@ static int engine_thread(void * param)
         {
             SDL_mutexP(event_mutex);
             SDL_CondWait(event_condition, event_mutex);
+            bool moreEvents = true;
+            while (moreEvents)
+            {
+                Event event;
+                SDL_mutexP(event_queue_mutex);
+                if (event_queue.size() < 1)
+                    moreEvents = false;
+                else
+                {
+                    event = event_queue.front();
+                    event_queue.pop();
+                }
+                SDL_mutexV(event_queue_mutex);
+                if (moreEvents)
+                {
+                    /* process the event */
+                    switch (event.type)
+                    {
+                        case EVENT_UPDATE:
+                            g_engine->update();
+                            lastUpdateCompleted = true;
+                            break;
+                    }
+                }
+            }
         }
     }
     engine_running = false;
@@ -82,7 +107,7 @@ int main(int argc, char * argv[])
         usage();
     }
 
-    lastDrawCompleted = true;
+    lastUpdateCompleted = true;
     engine_running = true;
     /* setup SDL update event */
     userEvent.type = SDL_USEREVENT;
@@ -114,7 +139,7 @@ int main(int argc, char * argv[])
 /* called by SDL when the update timer expires */
 static Uint32 updateCallback(Uint32 interval, void * param)
 {
-    if (lastDrawCompleted)
+    if (lastUpdateCompleted)
         SDL_PushEvent(&userEvent);
     return interval;
 }
@@ -157,6 +182,7 @@ static void update()
 {
     Event update_event;
     update_event.type = EVENT_UPDATE;
+    lastUpdateCompleted = false;
     addEvent(update_event);
 }