fix some threading crashes

src/pc/loading.h

@@ -18,7 +18,7 @@ struct LoadingSegment {
 extern struct LoadingSegment gCurrLoadingSegment;
 
 #define LOADING_SCREEN_MUTEX(...) \
-    if (!gCLIOpts.hideLoadingScreen && gLoadingThread.state != INVALID) { \
+    if (!gCLIOpts.hideLoadingScreen && gLoadingThread.state == RUNNING) { \
         pthread_mutex_lock(&gLoadingThread.mutex); \
         __VA_ARGS__; \
         pthread_mutex_unlock(&gLoadingThread.mutex); \

src/pc/thread.c

@@ -6,19 +6,19 @@
 int init_thread_handle(struct ThreadHandle *handle, void *(*entry)(void *), void *arg, void *sp, size_t sp_size) {
     int err1 = init_mutex(handle);
     int err2 = init_thread(handle, entry, arg, sp, sp_size);
-    
+
     return (err1 != 0 || err2 != 0);
 }
 
 void free_thread_handle(struct ThreadHandle *handle) {
     assert(handle != NULL);
-    
+
     //int err = stop_thread(handle);
     //assert(err == 0);
-    
+
     int err = destroy_mutex(handle);
     assert(err == 0);
-    
+
     // Reset the memory of the thread handle, We no longer need the thread or mutex.
     memset((void *)handle, 0, sizeof(struct ThreadHandle));
 }
@@ -26,18 +26,18 @@ void free_thread_handle(struct ThreadHandle *handle) {
 // Optimally just call init_thread_handle instead.
 int init_thread(struct ThreadHandle *handle, void *(*entry)(void *), void *arg, void *sp, size_t sp_size) {
     assert(handle != NULL);
-    
+
     // Setup our thread and create it.
     pthread_attr_t thattr = { 0 };
-    
+
     // Initialize default attributes for a new thread.
     int err = pthread_attr_init(&thattr);
     assert(err == 0);
-    
+
     // By default, We want the thread to be joinable.
     err = pthread_attr_setdetachstate(&thattr, PTHREAD_CREATE_JOINABLE);
     assert(err == 0);
-    
+
     // Set the stack if we have one specified, Otherwise we don't care.
     // In truth, This honestly shouldn't be used on PC. But if somebody wants
     // a really managed stack? This is possible.
@@ -45,29 +45,33 @@ int init_thread(struct ThreadHandle *handle, void *(*entry)(void *), void *arg,
         err = pthread_attr_setstack(&thattr, sp, sp_size);
         assert(err == 0);
     }
-    
+
     // Create our thread.
     int ret = pthread_create(&handle->thread, &thattr, entry, arg);
-    
-    // Destroy the thread attributes, They are no longer needed 
+
+    // Destroy the thread attributes, They are no longer needed
     err = pthread_attr_destroy(&thattr);
     assert(err == 0);
-    
+
     handle->state = RUNNING;
-    
+
     return ret;
 }
 
 int join_thread(struct ThreadHandle *handle) {
     assert(handle != NULL);
-    
+
+    handle->state = STOPPED;
+
     // Join the thread and wait for it to finish.
     return pthread_join(handle->thread, NULL);
 }
 
 int detach_thread(struct ThreadHandle *handle) {
     assert(handle != NULL);
-    
+
+    handle->state = STOPPED;
+
     // Detach the thread, it will no longer be joinable afterwards.
     return pthread_detach(handle->thread);
 }
@@ -90,43 +94,43 @@ int stop_thread(struct ThreadHandle *handle) {
 // Optimally just call init_thread_handle instead.
 int init_mutex(struct ThreadHandle *handle) {
     assert(handle != NULL);
-    
+
     pthread_mutexattr_t mtattr;
 
     int err = pthread_mutexattr_init(&mtattr);
     assert(err == 0);
-    
+
     err = pthread_mutexattr_settype(&mtattr, PTHREAD_MUTEX_ERRORCHECK);
     assert(err == 0);
-    
+
     int ret = pthread_mutex_init(&handle->mutex, &mtattr);
-    
+
     err = pthread_mutexattr_destroy(&mtattr);
     assert(err == 0);
-    
+
     return ret;
 }
 
 int destroy_mutex(struct ThreadHandle *handle) {
     assert(handle != NULL);
-    
+
     return pthread_mutex_destroy(&handle->mutex);
 }
 
 int lock_mutex(struct ThreadHandle *handle) {
     assert(handle != NULL);
-    
+
     return pthread_mutex_lock(&handle->mutex);
 }
 
 int trylock_mutex(struct ThreadHandle *handle) {
     assert(handle != NULL);
-    
+
     return pthread_mutex_trylock(&handle->mutex);
 }
 
 int unlock_mutex(struct ThreadHandle *handle) {
     assert(handle != NULL);
-    
+
     return pthread_mutex_unlock(&handle->mutex);
 }

src/pc/thread.h

@@ -7,8 +7,8 @@
 #include "types.h"
 
 // Macros
-#define MUTEX_LOCK(handle) if (handle.state != INVALID) { lock_mutex(&handle); }
-#define MUTEX_UNLOCK(handle) if (handle.state != INVALID) { unlock_mutex(&handle); }
+#define MUTEX_LOCK(handle) if (handle.state == RUNNING) { lock_mutex(&handle); }
+#define MUTEX_UNLOCK(handle) if (handle.state == RUNNING) { unlock_mutex(&handle); }
 
 // Types
 enum ThreadState {