added a simple benchmarking suite

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54790 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/benchmarks/bench.h

@@ -0,0 +1,84 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        tests/benchmarks/bench.h
+// Purpose:     Main header of the benchmarking suite
+// Author:      Vadim Zeitlin
+// Created:     2008-07-19
+// RCS-ID:      $Id$
+// Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows license
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_TESTS_BENCHMARKS_BENCH_H_
+#define _WX_TESTS_BENCHMARKS_BENCH_H_
+
+#include "wx/cpp.h"
+
+namespace Bench
+{
+
+/**
+    Utility object used to register the benchmark functions.
+
+    @see BENCHMARK_FUNC
+ */
+class Function
+{
+public:
+    typedef bool (*Type)();
+
+    /// Ctor is used implicitly by BENCHMARK_FUNC().
+    Function(const char *name, Type func)
+        : m_name(name),
+          m_func(func),
+          m_next(ms_head)
+    {
+        ms_head = this;
+    }
+
+    /// Get the name of this function
+    const char *GetName() const { return m_name; }
+
+    /// Run the function, return its return value.
+    bool Run() { return (*m_func)(); }
+
+
+    /// Get the head of the linked list of benchmark objects
+    static Function *GetFirst() { return ms_head; }
+
+    /// Get the next object in the linked list or NULL
+    Function *GetNext() const { return m_next; }
+
+private:
+    // the head of the linked list of Bench::Function objects
+    static Function *ms_head;
+
+    // name of and pointer to the function, as passed to the ctor
+    const char * const m_name;
+    const Type m_func;
+
+    // pointer to the next object in the linked list or NULL
+    Function * const m_next;
+
+    DECLARE_NO_COPY_CLASS(Function)
+};
+
+} // namespace Bench
+
+/**
+    This macro defines a benchmark function.
+
+    All these functions return a boolean value and take no parameters. The
+    return value is needed to prevent the compiler from optimizing the
+    benchmark entirely away and so typically will be constructed using the
+    results of the benchmark actions, even though normally benchmark should
+    always return true.
+
+    Once benchmark is defined, it can be invoked from the command line of the
+    main benchmarking program.
+ */
+#define BENCHMARK_FUNC(name)                                                  \
+    static bool name();                                                       \
+    static Bench::Function wxMAKE_UNIQUE_NAME(name)(#name, name);             \
+    bool name()
+
+#endif // _WX_TESTS_BENCHMARKS_BENCH_H_