Add mem.Allocator_Query_Info and mem.query_info

core/runtime/core.odin

@@ -234,6 +234,9 @@ args__: []cstring;
 
 // IMPORTANT NOTE(bill): Must be in this order (as the compiler relies upon it)
 
+@builtin
+Maybe :: union(T: typeid) #maybe {T};
+
 
 Source_Code_Location :: struct {
 	file_path:    string,
@@ -252,10 +255,17 @@ Allocator_Mode :: enum byte {
 	Free_All,
 	Resize,
 	Query_Features,
+	Query_Info,
 }
 
 Allocator_Mode_Set :: distinct bit_set[Allocator_Mode];
 
+Allocator_Query_Info :: struct {
+	pointer:   rawptr,
+	size:      Maybe(int),
+	alignment: Maybe(int),
+}
+
 Allocator_Proc :: #type proc(allocator_data: rawptr, mode: Allocator_Mode,
                              size, alignment: int,
                              old_memory: rawptr, old_size: int, flags: u64 = 0, location: Source_Code_Location = #caller_location) -> rawptr;
@@ -310,10 +320,6 @@ Context :: struct {
 }
 
 
-@builtin
-Maybe :: union(T: typeid) #maybe {T};
-
-
 
 @thread_local global_default_temp_allocator_data: Default_Temp_Allocator;