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, 211 insertions, 0 deletions

diff --git a/apps/plugins/sdl/src/thread/generic/SDL_syssem.c b/apps/plugins/sdl/src/thread/generic/SDL_syssem.c
new file mode 100644
index 0000000000..1d289c05d0
--- /dev/null
+++ b/apps/plugins/sdl/src/thread/generic/SDL_syssem.c
@@ -0,0 +1,211 @@
+/*
+    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"
+
+/* An implementation of semaphores using mutexes and condition variables */
+
+#include "SDL_timer.h"
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+
+#if SDL_THREADS_DISABLED
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+        SDL_SetError("SDL not configured with thread support");
+        return (SDL_sem *)0;
+}
+
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+        return;
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+        SDL_SetError("SDL not configured with thread support");
+        return -1;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+        SDL_SetError("SDL not configured with thread support");
+        return -1;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+        SDL_SetError("SDL not configured with thread support");
+        return -1;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+        return 0;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+        SDL_SetError("SDL not configured with thread support");
+        return -1;
+}
+
+#else
+
+struct SDL_semaphore
+{
+        Uint32 count;
+        Uint32 waiters_count;
+        SDL_mutex *count_lock;
+        SDL_cond *count_nonzero;
+};
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+        SDL_sem *sem;
+
+        sem = (SDL_sem *)SDL_malloc(sizeof(*sem));
+        if ( ! sem ) {
+                SDL_OutOfMemory();
+                return NULL;
+        }
+        sem->count = initial_value;
+        sem->waiters_count = 0;
+
+        sem->count_lock = SDL_CreateMutex();
+        sem->count_nonzero = SDL_CreateCond();
+        if ( ! sem->count_lock || ! sem->count_nonzero ) {
+                SDL_DestroySemaphore(sem);
+                return NULL;
+        }
+
+        return sem;
+}
+
+/* WARNING:
+   You cannot call this function when another thread is using the semaphore.
+*/
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+        if ( sem ) {
+                sem->count = 0xFFFFFFFF;
+                while ( sem->waiters_count > 0) {
+                        SDL_CondSignal(sem->count_nonzero);
+                        SDL_Delay(10);
+                }
+                SDL_DestroyCond(sem->count_nonzero);
+                if ( sem->count_lock ) {
+                        SDL_mutexP(sem->count_lock);
+                        SDL_mutexV(sem->count_lock);
+                        SDL_DestroyMutex(sem->count_lock);
+                }
+                SDL_free(sem);
+        }
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+        int retval;
+
+        if ( ! sem ) {
+                SDL_SetError("Passed a NULL semaphore");
+                return -1;
+        }
+
+        retval = SDL_MUTEX_TIMEDOUT;
+        SDL_LockMutex(sem->count_lock);
+        if ( sem->count > 0 ) {
+                --sem->count;
+                retval = 0;
+        }
+        SDL_UnlockMutex(sem->count_lock);
+
+        return retval;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+        int retval;
+
+        if ( ! sem ) {
+                SDL_SetError("Passed a NULL semaphore");
+                return -1;
+        }
+
+        /* A timeout of 0 is an easy case */
+        if ( timeout == 0 ) {
+                return SDL_SemTryWait(sem);
+        }
+
+        SDL_LockMutex(sem->count_lock);
+        ++sem->waiters_count;
+        retval = 0;
+        while ( (sem->count == 0) && (retval != SDL_MUTEX_TIMEDOUT) ) {
+                retval = SDL_CondWaitTimeout(sem->count_nonzero,
+                                             sem->count_lock, timeout);
+        }
+        --sem->waiters_count;
+        if (retval == 0) {
+                --sem->count;
+        }
+        SDL_UnlockMutex(sem->count_lock);
+
+        return retval;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+        return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT);
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+        Uint32 value;
+        
+        value = 0;
+        if ( sem ) {
+                SDL_LockMutex(sem->count_lock);
+                value = sem->count;
+                SDL_UnlockMutex(sem->count_lock);
+        }
+        return value;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+        if ( ! sem ) {
+                SDL_SetError("Passed a NULL semaphore");
+                return -1;
+        }
+
+        SDL_LockMutex(sem->count_lock);
+        if ( sem->waiters_count > 0 ) {
+                SDL_CondSignal(sem->count_nonzero);
+        }
+        ++sem->count;
+        SDL_UnlockMutex(sem->count_lock);
+
+        return 0;
+}
+
+#endif /* SDL_THREADS_DISABLED */