scoped log gathering; communicate ctrl logs -> user via events

src/base/base_log.c

@@ -18,7 +18,6 @@ log_alloc(void)
   Arena *arena = arena_alloc();
   Log *log = push_array(arena, Log, 1);
   log->arena = arena;
-  log->log_buffer_start_pos = arena_pos(arena);
   return log;
 }
 
@@ -40,9 +39,10 @@ log_select(Log *log)
 internal void
 log_msg(String8 string)
 {
-  if(log_active != 0)
+  if(log_active != 0 && log_active->top_scope != 0)
   {
-    str8_list_push(log_active->arena, &log_active->log_buffer_strings, string);
+    String8 string_copy = push_str8_copy(log_active->arena, string);
+    str8_list_push(log_active->arena, &log_active->top_scope->strings, string_copy);
   }
 }
 
@@ -61,12 +61,37 @@ log_msgf(char *fmt, ...)
   }
 }
 
+////////////////////////////////
+//~ rjf: Log Scopes
+
 internal void
-log_clear(void)
+log_scope_begin(void)
 {
   if(log_active != 0)
   {
-    arena_pop_to(log_active->arena, log_active->log_buffer_start_pos);
-    MemoryZeroStruct(&log_active->log_buffer_strings);
+    U64 pos = arena_pos(log_active->arena);
+    LogScope *scope = push_array(log_active->arena, LogScope, 1);
+    scope->pos = pos;
+    SLLStackPush(log_active->top_scope, scope);
   }
 }
+
+internal String8
+log_scope_end(Arena *arena)
+{
+  String8 result = {0};
+  if(log_active != 0)
+  {
+    LogScope *scope = log_active->top_scope;
+    if(scope != 0)
+    {
+      SLLStackPop(log_active->top_scope);
+      if(arena != 0)
+      {
+        result = str8_list_join(arena, &scope->strings, 0);
+      }
+      arena_pop_to(log_active->arena, scope->pos);
+    }
+  }
+  return result;
+}

src/base/base_log.h

@@ -5,14 +5,21 @@
 #define BASE_LOG_H
 
 ////////////////////////////////
-//~ rjf: Log Type
+//~ rjf: Log Types
+
+typedef struct LogScope LogScope;
+struct LogScope
+{
+  LogScope *next;
+  U64 pos;
+  String8List strings;
+};
 
 typedef struct Log Log;
 struct Log
 {
   Arena *arena;
-  U64 log_buffer_start_pos;
-  String8List log_buffer_strings;
+  LogScope *top_scope;
 };
 
 ////////////////////////////////
@@ -23,10 +30,15 @@ internal void log_release(Log *log);
 internal void log_select(Log *log);
 
 ////////////////////////////////
-//~ rjf: Log Building/Clearing
+//~ rjf: Log Building
 
 internal void log_msg(String8 string);
 internal void log_msgf(char *fmt, ...);
-internal void log_clear(void);
+
+////////////////////////////////
+//~ rjf: Log Scopes
+
+internal void log_scope_begin(void);
+internal String8 log_scope_end(Arena *arena);
 
 #endif // BASE_LOG_H