From 62170a7ffee9a771bc71c52179e6ae7daa5ea11b Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Fri, 22 May 2026 13:50:56 -0700
Subject: [PATCH] CountingWriter: add writev

---
 counting_writer.zig | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/counting_writer.zig b/counting_writer.zig
index 92691b8615844a5db553ccdbf590793620f57c64..d54a35318fc41e62b1b85e0d7ca171bba947fa19 100644
--- a/counting_writer.zig
+++ b/counting_writer.zig
@@ -1,7 +1,13 @@
 const std = @import("std");
+const builtin = @import("builtin");
 const extras = @import("extras");
 const nio = @import("./nio.zig");
 
+const sys = switch (builtin.target.os.tag) {
+    .linux => @import("sys-linux"),
+    else => unreachable,
+};
+
 pub fn CountingWriter(WriterType: type) type {
     return struct {
         backing_writer: WriterType,
@@ -32,5 +38,10 @@ pub fn CountingWriter(WriterType: type) type {
             self.bytes_written += len;
             return len;
         }
+        pub fn writev(self: *Self, iovec: []const sys.struct_iovec) WriteError!usize {
+            const len = try self.backing_writer.writev(iovec);
+            self.bytes_written += len;
+            return len;
+        }
     };
 }
-- 
2.54.0