Add 'hotswap/' from commit '5487901d10f5a7ed200b2fbfe0a5b5cd730ba3a9'

git-subtree-dir: hotswap
git-subtree-mainline: 614695d55b
git-subtree-split: 5487901d10

hotswap/src/foo.zig

@@ -0,0 +1,25 @@
+const std = @import("std");
+const core = @import("core.zig");
+
+const Self = @This();
+
+export const MODULE = core.module(Self);
+
+pub fn startup(alloc: std.mem.Allocator) !*Self {
+    std.log.debug("!! startup {s} !!", .{@typeName(@This())});
+    return try alloc.create(Self);
+}
+
+pub fn unload(_: *Self, _: std.mem.Allocator) ![]u8 {
+    std.log.debug("!! unload {s} !!", .{@typeName(@This())});
+    return &.{};
+}
+
+pub fn reload(_: *Self, _: std.mem.Allocator, _: []u8) !void {
+    std.log.debug("!! reload {s} !!", .{@typeName(@This())});
+}
+
+pub fn shutdown(self: *Self, alloc: std.mem.Allocator) void {
+    std.log.debug("!! shutdown {s} !!", .{@typeName(@This())});
+    alloc.destroy(self);
+}