--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/os2/SDL_sysmutex.c	Wed Nov 23 07:29:56 2005 +0000
@@ -0,0 +1,115 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* Mutex functions using the OS/2 API */
+
+#include <stdio.h>
+#include <stdlib.h>
+#define INCL_DOSERRORS
+#define INCL_DOSSEMAPHORES
+#include <os2.h>
+
+#include "SDL_error.h"
+#include "SDL_mutex.h"
+
+
+struct SDL_mutex {
+	HMTX hmtxID;
+};
+
+/* Create a mutex */
+DECLSPEC SDL_mutex * SDLCALL SDL_CreateMutex(void)
+{
+  SDL_mutex *mutex;
+  APIRET ulrc;
+
+  /* Allocate mutex memory */
+  mutex = (SDL_mutex *)malloc(sizeof(*mutex));
+  if (mutex)
+  {
+    /* Create the mutex, with initial value signaled */
+    ulrc = DosCreateMutexSem(NULL,                  // Create unnamed semaphore
+                             &(mutex->hmtxID),      // Pointer to handle
+                             0L,                    // Flags: create it private (not shared)
+                             FALSE);                // Initial value: unowned
+    if (ulrc!=NO_ERROR)
+    {
+      SDL_SetError("Couldn't create mutex");
+      free(mutex);
+      mutex = NULL;
+    }
+  } else {
+    SDL_OutOfMemory();
+  }
+  return(mutex);
+}
+
+/* Free the mutex */
+DECLSPEC void SDLCALL SDL_DestroyMutex(SDL_mutex *mutex)
+{
+  if ( mutex )
+  {
+    if ( mutex->hmtxID )
+    {
+      DosCloseMutexSem(mutex->hmtxID);
+      mutex->hmtxID = 0;
+    }
+    free(mutex);
+  }
+}
+
+/* Lock the mutex */
+DECLSPEC int SDLCALL SDL_mutexP(SDL_mutex *mutex)
+{
+  if ( mutex == NULL )
+  {
+    SDL_SetError("Passed a NULL mutex");
+    return -1;
+  }
+  if ( DosRequestMutexSem(mutex->hmtxID, SEM_INDEFINITE_WAIT) != NO_ERROR )
+  {
+    SDL_SetError("Couldn't wait on mutex");
+    return -1;
+  }
+  return(0);
+}
+
+/* Unlock the mutex */
+DECLSPEC int SDLCALL SDL_mutexV(SDL_mutex *mutex)
+{
+  if ( mutex == NULL )
+  {
+    SDL_SetError("Passed a NULL mutex");
+    return -1;
+  }
+  if ( DosReleaseMutexSem(mutex->hmtxID) != NO_ERROR )
+  {
+    SDL_SetError("Couldn't release mutex");
+    return -1;
+  }
+  return(0);
+}