From 436766eca2fdb00afa1e62fe7c8da0d67a57ee78 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <randomdan@akira.random.lan>
Date: Sun, 7 Dec 2014 15:12:22 +0000
Subject: Add mutex around Slice::Preprocessor calls as they seem to be
 demonstrably not thread safe

---
 project2/ice/sliceCompile.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/project2/ice/sliceCompile.cpp b/project2/ice/sliceCompile.cpp
index 32831ac..b879965 100644
--- a/project2/ice/sliceCompile.cpp
+++ b/project2/ice/sliceCompile.cpp
@@ -1,6 +1,9 @@
 #include <pch.hpp>
 #include "sliceCompile.h"
 #include <scopeObject.h>
+#include <mutex>
+
+std::mutex slicePreprocessor;
 
 SliceCompile::SliceCompile(const boost::filesystem::path & slice, const IceCompile::Deps & dep) :
 	IceCompile(slice, dep)
@@ -11,6 +14,7 @@ unsigned int
 SliceCompile::build(const boost::filesystem::path & in, FILE * out) const
 {
 	std::vector<std::string> cppArgs;
+	std::lock_guard<std::mutex> lock(slicePreprocessor);
 	Slice::PreprocessorPtr icecpp = Slice::Preprocessor::create("slice2project2", in.string(), cppArgs);
 	FILE * cppHandle = icecpp->preprocess(false);
 
-- 
cgit v1.2.3