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 (*InitType)();
  29     typedef bool (*FuncType)();
  30     typedef void (*DoneType)();
  31
  32     /// Ctor is used implicitly by BENCHMARK_FUNC().
  33     Function(const char *name,
  34              FuncType func,
  35              InitType init = NULL,
  36              DoneType done = NULL)
  37         : m_name(name),
  38           m_func(func),
  39           m_init(init),
  40           m_done(done),
  41           m_next(ms_head)
  42     {
  43         ms_head = this;
  44     }
  45
  46     /// Get the name of this function
  47     const char *GetName() const { return m_name; }
  48
  49     /// Perform once-only initialization prior to Run().
  50     bool Init() { return m_init ? (*m_init)() : true; }
  51
  52     /// Run the function, return its return value.
  53     bool Run() { return (*m_func)(); }
  54
  55     /// Clean up after performing the benchmark.
  56     void Done() { if ( m_done ) (*m_done)(); }
  57
  58     /// Get the head of the linked list of benchmark objects
  59     static Function *GetFirst() { return ms_head; }
  60
  61     /// Get the next object in the linked list or NULL
  62     Function *GetNext() const { return m_next; }
  63
  64 private:
  65     // the head of the linked list of Bench::Function objects
  66     static Function *ms_head;
  67
  68     // name of and pointer to the function, as passed to the ctor
  69     const char * const m_name;
  70     const FuncType m_func;
  71     const InitType m_init;
  72     const DoneType m_done;
  73
  74     // pointer to the next object in the linked list or NULL
  75     Function * const m_next;
  76
  77     DECLARE_NO_COPY_CLASS(Function)
  78 };
  79
  80 /**
  81     Get the numeric parameter.
  82
  83     Tests may use this parameter in whatever way they see fit, by default it is
  84     1 but can be set to a different value by user from the command line.
  85  */
  86 long GetNumericParameter();
  87
  88 /**
  89     Get the string parameter.
  90
  91     Tests may use this parameter in whatever way they see fit, by default it is
  92     empty but can be set to a different value by user from the command line.
  93  */
  94 wxString GetStringParameter();
  95
  96 } // namespace Bench
  97
  98 /**
  99     This macro defines a benchmark function.
 100
 101     All these functions return a boolean value and take no parameters. The
 102     return value is needed to prevent the compiler from optimizing the
 103     benchmark entirely away and so typically will be constructed using the
 104     results of the benchmark actions, even though normally benchmark should
 105     always return true.
 106
 107     Once benchmark is defined, it can be invoked from the command line of the
 108     main benchmarking program.
 109  */
 110 #define BENCHMARK_FUNC(name)                                                  \
 111     static bool name();                                                       \
 112     static Bench::Function wxMAKE_UNIQUE_NAME(name)(#name, name);             \
 113     bool name()
 114
 115 /**
 116     Define a benchmark function requiring initialization and shutdown.
 117
 118     This macro is similar to BENCHMARK_FUNC() but ensures that @a init is
 119     called before the benchmark is ran and @a done afterwards.
 120  */
 121 #define BENCHMARK_FUNC_WITH_INIT(name, init, done)                            \
 122     static bool name();                                                       \
 123     static Bench::Function wxMAKE_UNIQUE_NAME(name)(#name, name, init, done); \
 124     bool name()
 125
 126 #endif // _WX_TESTS_BENCHMARKS_BENCH_H_