moved rendering to a system.

To ensure that the rendering system is being run in the main thread, I
added the concept of "Sync systems", so that when a system group is
created it's possible to specify whether it's possible to run it on a
separate thread or not.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/ecs/ecs.zig b/src/ecs/ecs.zig
index e389223..4ec765f 100644
--- a/src/ecs/ecs.zig
+++ b/src/ecs/ecs.zig
@@ -1,7 +1,12 @@
 pub const components = @import("components.zig");
 pub const entities = @import("entities.zig");
 
+pub const SystemError = error{
+    fail,
+    die,
+};
+
 pub const Pool = entities.Pool;
 pub const Resources = entities.Resources;
-pub const System = *const fn (*Pool) void;
+pub const System = *const fn (*Pool) anyerror!void;
 pub const SystemGroup = []const System;