[Assorted-commits] SF.net SVN: assorted:[1191] sandbox/trunk/src/cc

[<yan...@us...>]

Revision: 1191
          http://assorted.svn.sourceforge.net/assorted/?rev=1191&view=rev
Author:   yangzhang
Date:     2009-02-18 00:29:29 +0000 (Wed, 18 Feb 2009)

Log Message:
-----------
added clamp memory safety demo

Added Paths:
-----------
    sandbox/trunk/src/cc/clamp.cc.clamp
    sandbox/trunk/src/cc/clamp.mk

Added: sandbox/trunk/src/cc/clamp.cc.clamp
===================================================================
--- sandbox/trunk/src/cc/clamp.cc.clamp	                        (rev 0)
+++ sandbox/trunk/src/cc/clamp.cc.clamp	2009-02-18 00:29:29 UTC (rev 1191)
@@ -0,0 +1,27 @@
+// Examine memory safety of using context-less lambdas.
+// Turns out that the lambdas can be copy constructed
+// and that function0<> stores a copy of the functor.
+// Everything works as expected.
+#include <iostream>
+#include <boost/function.hpp>
+using namespace std;
+using namespace boost;
+#include "lambda_impl.clamp_h"
+struct save {
+  save(function<void()> f) : f(f) {}
+  void call() { f(); }
+  function<void()> f;
+};
+int main() {
+  int x = 0;
+  save s(lambda() { cout << "0. " << __ctx(x) << endl; });
+  ++x;
+  save t(lambda() { cout << "1. " << __ctx(x) << endl; });
+  s.call();
+  t.call();
+
+  ++x;
+  function<void()> f = lambda() { cout << "2. " << __ctx(x) << endl; };
+  f();
+  return 0;
+}

Added: sandbox/trunk/src/cc/clamp.mk
===================================================================
--- sandbox/trunk/src/cc/clamp.mk	                        (rev 0)
+++ sandbox/trunk/src/cc/clamp.mk	2009-02-18 00:29:29 UTC (rev 1191)
@@ -0,0 +1,4 @@
+all: clamp
+
+clamp.cc: clamp.cc.clamp
+	clamp < $< | sed '1d' > $@


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