From c6ba966d8665e654560ee16c0c162a1d026cbddc Mon Sep 17 00:00:00 2001
From: Max Desiatov <max@desiatov.com>
Date: Tue, 11 Feb 2020 00:54:40 +0000
Subject: [PATCH] Add ifdef to ThreadBarriers to fix master builds (#107)

---
 .../SwiftPrivateThreadExtras/ThreadBarriers.swift   | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/stdlib/private/SwiftPrivateThreadExtras/ThreadBarriers.swift b/stdlib/private/SwiftPrivateThreadExtras/ThreadBarriers.swift
index 8bef3340ec82a..1750ffe1b1a03 100644
--- a/stdlib/private/SwiftPrivateThreadExtras/ThreadBarriers.swift
+++ b/stdlib/private/SwiftPrivateThreadExtras/ThreadBarriers.swift
@@ -87,6 +87,19 @@ public func _stdlib_thread_barrier_init(
   return 0
 }
 
+#if !os(Windows) && !os(WASI)
+private func _stdlib_thread_barrier_mutex_and_cond_init(_ barrier: UnsafeMutablePointer<_stdlib_thread_barrier_t>) -> CInt {
+  guard pthread_mutex_init(barrier.pointee.mutex!, nil) == 0 else {
+    return -1
+  }
+  guard pthread_cond_init(barrier.pointee.cond!, nil) == 0 else {
+    pthread_mutex_destroy(barrier.pointee.mutex!)
+    return -1
+  }
+  return 0
+}
+#endif
+
 public func _stdlib_thread_barrier_destroy(
   _ barrier: UnsafeMutablePointer<_stdlib_thread_barrier_t>
 ) -> CInt {