From 72fc117393b7b9cf34446ac6b990f344284c43a8 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Tue, 7 May 2019 19:59:32 +0200
Subject: [PATCH] thread/WindowsCond: add wait() overload with predicate

---
 src/thread/WindowsCond.hxx | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/thread/WindowsCond.hxx b/src/thread/WindowsCond.hxx
index 40389512b..7c0b19a1f 100644
--- a/src/thread/WindowsCond.hxx
+++ b/src/thread/WindowsCond.hxx
@@ -63,6 +63,13 @@ public:
 					 INFINITE);
 	}
 
+	template<typename M, typename P>
+	void wait(std::unique_lock<M> &lock,
+		  P &&predicate) noexcept {
+		while (!predicate())
+			wait(lock);
+	}
+
 	bool wait_for(std::unique_lock<CriticalSection> &lock,
 		      std::chrono::steady_clock::duration timeout) noexcept {
 		auto timeout_ms = std::chrono::duration_cast<std::chrono::milliseconds>(timeout).count();