From 4700fa924ab82ca2e41daa627a59f691d8177d5b Mon Sep 17 00:00:00 2001
From: Martin Ashby <martin@ashbysoft.com>
Date: Sun, 3 Dec 2023 22:09:16 +0000
Subject: Fix the annoying freeze on .free It was caused by duplicating
 GeneralPurposeAllocator, by using it as a struct value. It has a mutex in it,
 so don't do that.

---
 common.zig | 11 +++--------
 day1.zig   |  4 +++-
 day2.zig   |  4 +++-
 3 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/common.zig b/common.zig
index f724940..c38beb1 100644
--- a/common.zig
+++ b/common.zig
@@ -2,16 +2,13 @@ const std = @import("std");
 
 pub const Setup = struct {
     pub const Part = enum { pt1, pt2 };
-
-    gpa: std.heap.GeneralPurposeAllocator(.{}),
     a: std.mem.Allocator,
     input: []const u8,
     part: Part,
 
-    pub fn get() !Setup {
+    pub fn get(a: std.mem.Allocator) !Setup {
         var res: Setup = undefined;
-        res.gpa = std.heap.GeneralPurposeAllocator(.{}){};
-        res.a = res.gpa.allocator();
+        res.a = a;
         var p = std.process.args();
         var file: []const u8 = "";
         if (!p.skip()) return error.NoProgramName;
@@ -39,8 +36,6 @@ pub const Setup = struct {
         return res;
     }
     pub fn deinit(self: *Setup) void {
-        _ = self;
-        //self.a.free(self.input);  // For some reason this is freezing
-        //_ = self.gpa.deinit();    // and if we don't free, then gpa.deinit whinges that we leaked memory :)
+        self.a.free(self.input);  // For some reason this is freezing
     }
 };
diff --git a/day1.zig b/day1.zig
index 5258b4e..5143fdc 100644
--- a/day1.zig
+++ b/day1.zig
@@ -49,7 +49,9 @@ const w2d = std.comptime_string_map.ComptimeStringMap(u8, .{
 });
 
 pub fn main() !void {
-    var s = try Setup.get();
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+    var s = try Setup.get(gpa.allocator());
     defer s.deinit();
     var l = std.mem.splitScalar(u8, s.input, '\n');
     var t: u64 = 0;
diff --git a/day2.zig b/day2.zig
index 9ce71d9..c29bd0e 100644
--- a/day2.zig
+++ b/day2.zig
@@ -16,7 +16,9 @@ const Colour = enum {
 };
 
 pub fn main() !void {
-    var setup = try Setup.get();
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+    var setup = try Setup.get(gpa.allocator());
     defer setup.deinit();
     var sum: u32 = 0;
     var lines = std.mem.splitScalar(u8, setup.input, '\n');
-- 
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