From 8dc3c0e2db6ce4f571d5b763c396bdab49f94889 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sat, 7 Jan 2017 17:18:23 +0100
Subject: Retry semaphore timedwait on interrupt.

---
 src/semaphore.cc | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src')

diff --git a/src/semaphore.cc b/src/semaphore.cc
index 51014b3..a7c8e74 100644
--- a/src/semaphore.cc
+++ b/src/semaphore.cc
@@ -30,6 +30,8 @@
 #include <limits>
 #include <assert.h>
 #include <string.h>
+#include <chrono>
+#include <thread>
 
 #include "platform.h"
 
@@ -134,9 +136,18 @@ bool Semaphore::wait(const std::chrono::milliseconds& timeout)
 		ts.tv_sec += 1;
 	}
 
+again:
 	int ret = sem_timedwait(&prv->semaphore, &ts);
 	if(ret < 0)
 	{
+		if(errno == EINTR)
+		{
+			// The timed wait were interrupted prematurely so we need to wait some
+			// more. To prevent an infinite loop-like behaviour we make a short sleep.
+			std::this_thread::sleep_for(std::chrono::milliseconds(1));
+			goto again;
+		}
+
 		if(errno == ETIMEDOUT)
 		{
 			return false;
-- 
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