1 files changed, 75 insertions, 0 deletions
diff --git a/trunk/ACE/ace/Test_and_Set.h b/trunk/ACE/ace/Test_and_Set.h
new file mode 100644
index 00000000000..d72c3d474b0
--- /dev/null
+++ b/trunk/ACE/ace/Test_and_Set.h
@@ -0,0 +1,75 @@
+// -*- C++ -*-
+
+//=============================================================================
+/**
+ *  @file   Test_and_Set.h
+ *
+ *  $Id$
+ */
+//=============================================================================
+
+
+#ifndef ACE_TEST_AND_SET_H
+#define ACE_TEST_AND_SET_H
+
+#include /**/ "ace/pre.h"
+#include "ace/Event_Handler.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+/**
+ * @class ACE_Test_and_Set
+ *
+ * @brief Implements the classic ``test and set'' operation.
+ *
+ *
+ *     This class keeps track of the status of <is_set_>, which can
+ *     be set based on various events (such as receipt of a
+ *     signal).  This class is derived from ACE_Event_Handler so
+ *     that it can be "signaled" by a Reactor when a signal occurs.
+ *     We assume that <TYPE> is a data type that can be assigned the
+ *     value 0 or 1.
+ */
+template <class ACE_LOCK, class TYPE>
+class ACE_Test_and_Set : public ACE_Event_Handler
+{
+public:
+  ACE_Test_and_Set (TYPE initial_value = 0);
+
+  /// Returns true if we are set, else false.
+  TYPE is_set (void) const;
+
+  /// Sets the <is_set_> status, returning the original value of
+  /// <is_set_>.
+  TYPE set (TYPE);
+
+  /// Called when object is signaled by OS (either via UNIX signals or
+  /// when a Win32 object becomes signaled).
+  virtual int handle_signal (int signum,
+                             siginfo_t * = 0,
+                             ucontext_t * = 0);
+
+private:
+  /// Keeps track of our state.
+  TYPE is_set_;
+
+  /// Protect the state from race conditions.
+  ACE_LOCK lock_;
+};
+
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
+#include "ace/Test_and_Set.cpp"
+#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
+
+#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
+#pragma implementation ("Test_and_Set.cpp")
+#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
+
+#include /**/ "ace/post.h"
+#endif /* ACE_TEST_AND_SET_H */