tests/benchmarks/bench.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/benchmarks/bench.h
   3 // Purpose:     Main header of the benchmarking suite
   4 // Author:      Vadim Zeitlin
   5 // Created:     2008-07-19
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows license
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_TESTS_BENCHMARKS_BENCH_H_
  12 #define _WX_TESTS_BENCHMARKS_BENCH_H_
  13
  14 #include "wx/cpp.h"
  15 #include "wx/defs.h"
  16
  17 namespace Bench
  18 {
  19
  20 /**
  21     Utility object used to register the benchmark functions.
  22
  23     @see BENCHMARK_FUNC
  24  */
  25 class Function
  26 {
  27 public:
  28     typedef bool (*Type)();
  29
  30     /// Ctor is used implicitly by BENCHMARK_FUNC().
  31     Function(const char *name, Type func)
  32         : m_name(name),
  33           m_func(func),
  34           m_next(ms_head)
  35     {
  36         ms_head = this;
  37     }
  38
  39     /// Get the name of this function
  40     const char *GetName() const { return m_name; }
  41
  42     /// Run the function, return its return value.
  43     bool Run() { return (*m_func)(); }
  44
  45
  46     /// Get the head of the linked list of benchmark objects
  47     static Function *GetFirst() { return ms_head; }
  48
  49     /// Get the next object in the linked list or NULL
  50     Function *GetNext() const { return m_next; }
  51
  52 private:
  53     // the head of the linked list of Bench::Function objects
  54     static Function *ms_head;
  55
  56     // name of and pointer to the function, as passed to the ctor
  57     const char * const m_name;
  58     const Type m_func;
  59
  60     // pointer to the next object in the linked list or NULL
  61     Function * const m_next;
  62
  63     DECLARE_NO_COPY_CLASS(Function)
  64 };
  65
  66 } // namespace Bench
  67
  68 /**
  69     This macro defines a benchmark function.
  70
  71     All these functions return a boolean value and take no parameters. The
  72     return value is needed to prevent the compiler from optimizing the
  73     benchmark entirely away and so typically will be constructed using the
  74     results of the benchmark actions, even though normally benchmark should
  75     always return true.
  76
  77     Once benchmark is defined, it can be invoked from the command line of the
  78     main benchmarking program.
  79  */
  80 #define BENCHMARK_FUNC(name)                                                  \
  81     static bool name();                                                       \
  82     static Bench::Function wxMAKE_UNIQUE_NAME(name)(#name, name);             \
  83     bool name()
  84
  85 #endif // _WX_TESTS_BENCHMARKS_BENCH_H_