promote content scope to base layer, rename as 'access'; generalize based just on list of scope refcounts, + optional cvs; eliminate c_scope; replace dasm_scope with access as well

src/base/base_thread_context.h

@@ -15,6 +15,24 @@ struct LaneCtx
   Barrier barrier;
 };
 
+////////////////////////////////
+//~ rjf: Access Scopes
+
+typedef struct Touch Touch;
+struct Touch
+{
+  Touch *next;
+  U64 *touch_count;
+  CondVar cv;
+};
+
+typedef struct Access Access;
+struct Access
+{
+  Access *next;
+  Touch *top_touch;
+};
+
 ////////////////////////////////
 //~ rjf: Base Per-Thread State Bundle
 
@@ -34,6 +52,11 @@ struct TCTX
   // rjf: source location info
   char *file_name;
   U64 line_number;
+  
+  // rjf: accesses
+  Arena *access_arena;
+  Access *free_access;
+  Touch *free_touch;
 };
 
 ////////////////////////////////
@@ -69,4 +92,9 @@ internal void tctx_write_srcloc(char *file_name, U64 line_number);
 internal void tctx_read_srcloc(char **file_name, U64 *line_number);
 #define tctx_write_this_srcloc() tctx_write_srcloc(__FILE__, __LINE__)
 
+//- rjf: access scopes
+internal Access *access_open(void);
+internal void access_close(Access *access);
+internal void access_touch(Access *access, U64 *touch_count, CondVar cv);
+
 #endif // BASE_THREAD_CONTEXT_H