Trying to improve threading, thread queue

src/basic/thread_queue.h

@@ -0,0 +1,30 @@
+#define WORK_FUNCTION(name) void name(void *data)
+typedef WORK_FUNCTION(WorkQueueCallback);
+
+struct WorkQueueEntry {
+    WorkQueueCallback *callback;
+    void              *data;
+};
+
+struct ThreadCtx {
+    int thread_index;
+};
+
+struct WorkQueue {
+    WorkQueueEntry entries[256];
+    int64_t volatile index_to_write;
+    int64_t volatile index_to_read;
+    int64_t volatile completion_index;
+    int64_t volatile completion_goal;
+    void *semaphore;
+};
+
+struct ThreadStartupInfo {
+    uint32_t   thread_id;
+    int32_t    thread_index;
+    WorkQueue *queue;
+};
+
+void PushWork(WorkQueue *wq, void *data, WorkQueueCallback *callback);
+void InitWorkQueue(WorkQueue *queue, uint32_t thread_count, ThreadStartupInfo *info);
+void WaitUntilCompletion(WorkQueue *wq);