Port of Duke Nukem 3D

This ports Fabien Sanglard's Chocolate Duke to run on a version of SDL
for Rockbox.

Change-Id: I8f2c4c78af19de10c1633ed7bb7a997b43256dd9

1 files changed, 153 insertions, 0 deletions

diff --git a/apps/plugins/sdl/src/thread/pthread/SDL_sysmutex.c b/apps/plugins/sdl/src/thread/pthread/SDL_sysmutex.c
new file mode 100644
index 0000000000..c3b8ce2c37
--- /dev/null
+++ b/apps/plugins/sdl/src/thread/pthread/SDL_sysmutex.c
@@ -0,0 +1,153 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#include <pthread.h>
+
+#include "SDL_thread.h"
+
+#if !SDL_THREAD_PTHREAD_RECURSIVE_MUTEX && \
+    !SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP
+#define FAKE_RECURSIVE_MUTEX
+#endif
+
+struct SDL_mutex {
+        pthread_mutex_t id;
+#if FAKE_RECURSIVE_MUTEX
+        int recursive;
+        pthread_t owner;
+#endif
+};
+
+SDL_mutex *SDL_CreateMutex (void)
+{
+        SDL_mutex *mutex;
+        pthread_mutexattr_t attr;
+
+        /* Allocate the structure */
+        mutex = (SDL_mutex *)SDL_calloc(1, sizeof(*mutex));
+        if ( mutex ) {
+                pthread_mutexattr_init(&attr);
+#if SDL_THREAD_PTHREAD_RECURSIVE_MUTEX
+                pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+#elif SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP
+                pthread_mutexattr_setkind_np(&attr, PTHREAD_MUTEX_RECURSIVE_NP);
+#else
+                /* No extra attributes necessary */
+#endif
+                if ( pthread_mutex_init(&mutex->id, &attr) != 0 ) {
+                        SDL_SetError("pthread_mutex_init() failed");
+                        SDL_free(mutex);
+                        mutex = NULL;
+                }
+        } else {
+                SDL_OutOfMemory();
+        }
+        return(mutex);
+}
+
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+        if ( mutex ) {
+                pthread_mutex_destroy(&mutex->id);
+                SDL_free(mutex);
+        }
+}
+
+/* Lock the mutex */
+int SDL_mutexP(SDL_mutex *mutex)
+{
+        int retval;
+#if FAKE_RECURSIVE_MUTEX
+        pthread_t this_thread;
+#endif
+
+        if ( mutex == NULL ) {
+                SDL_SetError("Passed a NULL mutex");
+                return -1;
+        }
+
+        retval = 0;
+#if FAKE_RECURSIVE_MUTEX
+        this_thread = pthread_self();
+        if ( mutex->owner == this_thread ) {
+                ++mutex->recursive;
+        } else {
+                /* The order of operations is important.
+                   We set the locking thread id after we obtain the lock
+                   so unlocks from other threads will fail.
+                */
+                if ( pthread_mutex_lock(&mutex->id) == 0 ) {
+                        mutex->owner = this_thread;
+                        mutex->recursive = 0;
+                } else {
+                        SDL_SetError("pthread_mutex_lock() failed");
+                        retval = -1;
+                }
+        }
+#else
+        if ( pthread_mutex_lock(&mutex->id) < 0 ) {
+                SDL_SetError("pthread_mutex_lock() failed");
+                retval = -1;
+        }
+#endif
+        return retval;
+}
+
+int SDL_mutexV(SDL_mutex *mutex)
+{
+        int retval;
+
+        if ( mutex == NULL ) {
+                SDL_SetError("Passed a NULL mutex");
+                return -1;
+        }
+
+        retval = 0;
+#if FAKE_RECURSIVE_MUTEX
+        /* We can only unlock the mutex if we own it */
+        if ( pthread_self() == mutex->owner ) {
+                if ( mutex->recursive ) {
+                        --mutex->recursive;
+                } else {
+                        /* The order of operations is important.
+                           First reset the owner so another thread doesn't lock
+                           the mutex and set the ownership before we reset it,
+                           then release the lock semaphore.
+                         */
+                        mutex->owner = 0;
+                        pthread_mutex_unlock(&mutex->id);
+                }
+        } else {
+                SDL_SetError("mutex not owned by this thread");
+                retval = -1;
+        }
+
+#else
+        if ( pthread_mutex_unlock(&mutex->id) < 0 ) {
+                SDL_SetError("pthread_mutex_unlock() failed");
+                retval = -1;
+        }
+#endif /* FAKE_RECURSIVE_MUTEX */
+
+        return retval;
+}