From 6eaab69a767723c63faa5ca5d1560e58dce80b49 Mon Sep 17 00:00:00 2001
From: Oliver Kowalke <oliver.kowalke@gmx.de>
Date: Wed, 29 Jul 2015 20:06:06 +0200
Subject: [PATCH] bounded-channel: high-watermark must be greater than zero

---
 include/boost/fiber/bounded_channel.hpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/boost/fiber/bounded_channel.hpp b/include/boost/fiber/bounded_channel.hpp
index e11d6d7e..661d7703 100644
--- a/include/boost/fiber/bounded_channel.hpp
+++ b/include/boost/fiber/bounded_channel.hpp
@@ -217,6 +217,10 @@ public:
             throw invalid_argument( static_cast< int >( std::errc::invalid_argument),
                                     "boost fiber: high-watermark is less than low-watermark for bounded_channel");
         }
+        if ( 0 == hwm) {
+            throw invalid_argument( static_cast< int >( std::errc::invalid_argument),
+                                    "boost fiber: high-watermark is zero");
+        }
     }
 
     bounded_channel( std::size_t wm,
@@ -231,6 +235,10 @@ public:
         not_full_cond_(),
         hwm_( wm),
         lwm_( wm) {
+        if ( 0 == wm) {
+            throw invalid_argument( static_cast< int >( std::errc::invalid_argument),
+                                    "boost fiber: watermark is zero");
+        }
     }
 
     bounded_channel( bounded_channel const&) = delete;