1 files changed, 78 insertions, 0 deletions

diff --git a/uisimulator/sdl/thread-sdl.c b/uisimulator/sdl/thread-sdl.c
new file mode 100644
index 0000000000..41a60c9bc5
--- /dev/null
+++ b/uisimulator/sdl/thread-sdl.c
@@ -0,0 +1,78 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 Dan Everton
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <time.h>
+#include <SDL.h>
+#include <SDL_thread.h>
+#include <stdlib.h>
+#include "thread-sdl.h"
+#include "kernel.h"
+#include "debug.h"
+
+SDL_Thread          *threads[256];
+int                 threadCount = 0;
+long                current_tick = 0;
+SDL_mutex *m;
+
+void yield(void)
+{
+    SDL_mutexV(m);
+    SDL_Delay(1);
+    SDL_mutexP(m);
+}
+
+void sim_sleep(int ticks)
+{
+    SDL_mutexV(m);
+    SDL_Delay((1000/HZ) * ticks);
+    SDL_mutexP(m);
+}
+
+int runthread(void *data)
+{
+    SDL_mutexV(m);
+    ((void(*)())data) ();
+    SDL_mutexV(m);
+    return 0;
+}
+
+int create_thread(void (*fp)(void), void* sp, int stk_size)
+{
+    /** Avoid compiler warnings */
+    (void)sp;
+    (void)stk_size;
+
+    if (threadCount == 256) {
+        return -1;
+    }
+
+    threads[threadCount++] = SDL_CreateThread(runthread, fp);
+
+    return 0;
+}
+
+void init_threads(void)
+{
+    m = SDL_CreateMutex();
+
+    if (SDL_mutexP(m) == -1) {
+        fprintf(stderr, "Couldn't lock mutex\n");
+        exit(-1);
+    }
+}