ps: initial process subsystem

src/proc/private.zig

@@ -0,0 +1,28 @@
+const r = @import("root");
+const ke = r.ke;
+const ki = ke.private;
+const mm = r.mm;
+
+pub const thread = @import("thread.zig");
+
+pub var turnstile_zone: mm.zone.TypedZone(ki.turnstile.Turnstile) = undefined;
+
+fn turnstile_ctor(ts: *ki.turnstile.Turnstile) void {
+    ts.* = .{
+        .link = undefined,
+        .next_free = null,
+        .obj = undefined,
+        .owner = null,
+        .boost_link = undefined,
+        .donated = null,
+        .queues = undefined,
+        .waiters = 0,
+    };
+    ts.queues[0].init();
+    ts.queues[1].init();
+}
+
+/// Initialize the process subsystem.
+pub fn init() void {
+    turnstile_zone.init("turnstiles", .{ .ctor = turnstile_ctor });
+}