raddbgi_from_pdb: multithread initial independent parsing/preparation phases of converter

src/base/base_thread_context.c

@@ -19,6 +19,15 @@ tctx_init_and_equip(TCTX *tctx){
   tctx_thread_local = tctx;
 }
 
+internal void
+tctx_release(void)
+{
+  for(U64 i = 0; i < ArrayCount(tctx_thread_local->arenas); i += 1)
+  {
+    arena_release(tctx_thread_local->arenas[i]);
+  }
+}
+
 internal TCTX*
 tctx_get_equipped(void){
   return(tctx_thread_local);

src/base/base_thread_context.h

@@ -23,6 +23,7 @@ struct TCTX
 // NOTE(allen): Thread Context Functions
 
 internal void      tctx_init_and_equip(TCTX *tctx);
+internal void      tctx_release(void);
 internal TCTX*     tctx_get_equipped(void);
 
 internal Arena*    tctx_get_scratch(Arena **conflicts, U64 count);