From b131d2fb578dc103a1ea83ba71256350ef92d3fb Mon Sep 17 00:00:00 2001
From: Kenta Kubo <601636+kkebo@users.noreply.github.com>
Date: Sat, 8 Nov 2025 19:44:23 +0900
Subject: [PATCH] Add partial support for FreeBSD

This change will allow `swift build` to succeed. However, SwiftPM support is still incomplete and does not yet allow adding `.freebsd` to `.when(platforms:)`, so `swift test` cannot be executed.
---
 Sources/AsyncAlgorithms/Locking.swift | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Sources/AsyncAlgorithms/Locking.swift b/Sources/AsyncAlgorithms/Locking.swift
index a733ad87..16a6f263 100644
--- a/Sources/AsyncAlgorithms/Locking.swift
+++ b/Sources/AsyncAlgorithms/Locking.swift
@@ -29,7 +29,11 @@ internal struct Lock {
   #if canImport(Darwin)
   typealias Primitive = os_unfair_lock
   #elseif canImport(Glibc) || canImport(Musl) || canImport(Bionic) || canImport(wasi_pthread)
+  #if os(FreeBSD) || os(OpenBSD)
+  typealias Primitive = pthread_mutex_t?
+  #else
   typealias Primitive = pthread_mutex_t
+  #endif
   #elseif canImport(WinSDK)
   typealias Primitive = SRWLOCK
   #else