From 41d3b29ec0eaccac1a830c967869df5c4a1e2ff0 Mon Sep 17 00:00:00 2001
From: Michael Glassford <glassfordm@hotmail.com>
Date: Tue, 29 Mar 2005 16:19:32 +0000
Subject: [PATCH] Add assert() at beginning of thread::join().

[SVN r27868]
---
 src/thread.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/thread.cpp b/src/thread.cpp
index c3df8d6b..8d2f9658 100644
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -220,6 +220,7 @@ bool thread::operator!=(const thread& other) const
 
 void thread::join()
 {
+    assert(m_joinable); //See race condition comment below
     int res = 0;
 #if defined(BOOST_HAS_WINTHREADS)
     res = WaitForSingleObject(reinterpret_cast<HANDLE>(m_thread), INFINITE);