From ea4b246b7294491b0102e41fce1a828a704388f4 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Fri, 28 Aug 2015 02:18:29 +0100
Subject: Add ScopeExit (was ScopeObject)

---
 libadhocutil/scopeExit.cpp               | 22 ++++++++++++++++++++++
 libadhocutil/scopeExit.h                 | 24 ++++++++++++++++++++++++
 libadhocutil/unittests/Jamfile.jam       | 10 ++++++++++
 libadhocutil/unittests/testScopeExit.cpp | 27 +++++++++++++++++++++++++++
 4 files changed, 83 insertions(+)
 create mode 100644 libadhocutil/scopeExit.cpp
 create mode 100644 libadhocutil/scopeExit.h
 create mode 100644 libadhocutil/unittests/testScopeExit.cpp

diff --git a/libadhocutil/scopeExit.cpp b/libadhocutil/scopeExit.cpp
new file mode 100644
index 0000000..fa914c5
--- /dev/null
+++ b/libadhocutil/scopeExit.cpp
@@ -0,0 +1,22 @@
+#include "scopeExit.h"
+
+ScopeExit::ScopeExit(const Event & onexitpre, const Event & onsuccess, const Event & onfailure, const Event & onexitpost) :
+	onExitPre(onexitpre),
+	onSuccess(onsuccess),
+	onFailure(onfailure),
+	onExitPost(onexitpost)
+{
+}
+
+ScopeExit::~ScopeExit()
+{
+	if (onExitPre) onExitPre();
+	if (std::uncaught_exception()) {
+		if (onFailure) onFailure();
+	}
+	else {
+		if (onSuccess) onSuccess();
+	}
+	if (onExitPost) onExitPost();
+}
+
diff --git a/libadhocutil/scopeExit.h b/libadhocutil/scopeExit.h
new file mode 100644
index 0000000..d9854d5
--- /dev/null
+++ b/libadhocutil/scopeExit.h
@@ -0,0 +1,24 @@
+#ifndef LIBADHOC_SCOPEEXIT_H
+#define LIBADHOC_SCOPEEXIT_H
+
+#include <boost/function.hpp>
+#include "visibility.h"
+
+class DLL_PUBLIC ScopeExit {
+	public:
+		typedef boost::function<void()> Event;
+		ScopeExit(const Event &, const Event & = Event(), const Event & = Event(), const Event & = Event());
+		~ScopeExit();
+
+		ScopeExit(const ScopeExit &) = delete;
+		void operator=(const ScopeExit &) = delete;
+
+	private:
+		const Event onExitPre;
+		const Event onSuccess;
+		const Event onFailure;
+		const Event onExitPost;
+};
+
+#endif
+
diff --git a/libadhocutil/unittests/Jamfile.jam b/libadhocutil/unittests/Jamfile.jam
index c8abcb9..610a3c4 100644
--- a/libadhocutil/unittests/Jamfile.jam
+++ b/libadhocutil/unittests/Jamfile.jam
@@ -63,3 +63,13 @@ run
 	testMapFinds
 	;
 
+run
+	testScopeExit.cpp
+	: : :
+	<define>BOOST_TEST_DYN_LINK
+	<library>..//adhocutil
+	<library>boost_utf
+	:
+	testScopeExit
+	;
+
diff --git a/libadhocutil/unittests/testScopeExit.cpp b/libadhocutil/unittests/testScopeExit.cpp
new file mode 100644
index 0000000..80574f9
--- /dev/null
+++ b/libadhocutil/unittests/testScopeExit.cpp
@@ -0,0 +1,27 @@
+#define BOOST_TEST_MODULE ScopeExit
+#include <boost/test/unit_test.hpp>
+
+#include "scopeExit.h"
+#include <string>
+
+BOOST_AUTO_TEST_CASE ( cleanexit )
+{
+	std::string log;
+	{
+		ScopeExit se([&log]{ log += "before"; }, [&log]{ log += "clean"; }, [&log]{ log += "error"; }, [&log]{ log += "after"; });
+	}
+	BOOST_REQUIRE_EQUAL(log, "beforecleanafter");
+}
+
+BOOST_AUTO_TEST_CASE ( uncaught )
+{
+	BOOST_REQUIRE_THROW({
+		std::string log;
+		{
+			ScopeExit se([&log]{ log += "before"; }, [&log]{ log += "clean"; }, [&log]{ log += "error"; }, [&log]{ log += "after"; });
+			throw std::runtime_error("test unclean exit");
+		}
+		BOOST_REQUIRE_EQUAL(log, "beforeerrorafter");
+	}, std::runtime_error);
+}
+
-- 
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