begin prototype, transcript browser

src/core/core_ctx.c

@@ -7,6 +7,7 @@ gb_thread thread_ctx_t global_thread_context = {
         .log_proc = default_log_proc,
     }
 };
+gb_thread thread_ctx_t *tcx;
 
 fn void core_init(void) {
     tcx = &global_thread_context;

src/core/core_ctx.h

@@ -9,14 +9,12 @@ struct thread_ctx_t {
     // and which functions have state
     ma_arena_t perm;
 
-    void *data[32];
-    logger_t log;
-};
+    void *app_ctx;
+    void *rn_ctx;
+    void *ui_ctx;
+    void *te_ctx;
 
-enum {
-    tcx_slot_rn,
-    tcx_slot_ui,
-    tcx_slot_app,
+    logger_t log;
 };
 
 typedef enum {
@@ -36,5 +34,6 @@ fn alo_t malo(ma_arena_t *arena);
 fn alo_t malot(ma_temp_t temp);
 fn void  dealloc(alo_t alo, void *ptr);
 fn void *alloc_size(alo_t alo, size_t size);
+fn int   tcx_alloc_id(void);
 
-gb_thread thread_ctx_t *tcx;
+extern gb_thread thread_ctx_t *tcx;