tests/benchmarks/tls.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/benchmarks/strings.cpp
   3 // Purpose:     String-related benchmarks
   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 #include "bench.h"
  12
  13 #include "wx/tls.h"
  14
  15 #if defined(__UNIX__)
  16     #define HAVE_PTHREAD
  17     #include <pthread.h>
  18 #elif defined(__WIN32__)
  19     #define HAVE_WIN32_THREAD
  20     #include "wx/msw/wrapwin.h"
  21 #endif
  22
  23 #if wxCHECK_GCC_VERSION(3, 3)
  24     #define HAVE_COMPILER_THREAD
  25     #define wxTHREAD_SPECIFIC __thread
  26 #elif wxCHECK_VISUALC_VERSION(7)
  27     #define HAVE_COMPILER_THREAD
  28     #define wxTHREAD_SPECIFIC __declspec(thread)
  29 #endif
  30
  31 // uncomment this to also test Boost version (you will also need to link with
  32 // libboost_threads)
  33 //#define HAVE_BOOST_THREAD
  34 #ifdef HAVE_BOOST_THREAD
  35     #include <boost/thread/tss.hpp>
  36 #endif
  37
  38
  39 static const int NUM_ITER = 1000;
  40
  41 // this is just a baseline
  42 BENCHMARK_FUNC(DummyTLS)
  43 {
  44     static int s_global = 0;
  45
  46     for ( int n = 0; n < NUM_ITER; n++ )
  47     {
  48         if ( n % 2 )
  49             s_global = 0;
  50         else
  51             s_global = n;
  52     }
  53
  54     return !s_global;
  55 }
  56
  57 #ifdef HAVE_COMPILER_THREAD
  58
  59 BENCHMARK_FUNC(CompilerTLS)
  60 {
  61     static wxTHREAD_SPECIFIC int s_global = 0;
  62
  63     for ( int n = 0; n < NUM_ITER; n++ )
  64     {
  65         if ( n % 2 )
  66             s_global = 0;
  67         else
  68             s_global = n;
  69     }
  70
  71     return !s_global;
  72 }
  73
  74 #endif // HAVE_COMPILER_THREAD
  75
  76 #ifdef HAVE_PTHREAD
  77
  78 class PthreadKey
  79 {
  80 public:
  81     PthreadKey()
  82     {
  83         pthread_key_create(&m_key, NULL);
  84     }
  85
  86     ~PthreadKey()
  87     {
  88         pthread_key_delete(m_key);
  89     }
  90
  91     operator pthread_key_t() const { return m_key; }
  92
  93 private:
  94     pthread_key_t m_key;
  95
  96     DECLARE_NO_COPY_CLASS(PthreadKey)
  97 };
  98
  99 BENCHMARK_FUNC(PosixTLS)
 100 {
 101     static PthreadKey s_key;
 102
 103     for ( int n = 0; n < NUM_ITER; n++ )
 104     {
 105         if ( n % 2 )
 106             pthread_setspecific(s_key, 0);
 107         else
 108             pthread_setspecific(s_key, &n);
 109     }
 110
 111     return !pthread_getspecific(s_key);
 112 }
 113
 114 #endif // HAVE_PTHREAD
 115
 116 #ifdef HAVE_WIN32_THREAD
 117
 118 class TlsSlot
 119 {
 120 public:
 121     TlsSlot()
 122     {
 123         m_slot = ::TlsAlloc();
 124     }
 125
 126     ~TlsSlot()
 127     {
 128         ::TlsFree(m_slot);
 129     }
 130
 131     operator DWORD() const { return m_slot; }
 132
 133 private:
 134     DWORD m_slot;
 135
 136     DECLARE_NO_COPY_CLASS(TlsSlot)
 137 };
 138
 139 BENCHMARK_FUNC(Win32TLS)
 140 {
 141     static TlsSlot s_slot;
 142
 143     for ( int n = 0; n < NUM_ITER; n++ )
 144     {
 145         if ( n % 2 )
 146             ::TlsSetValue(s_slot, 0);
 147         else
 148             ::TlsSetValue(s_slot, &n);
 149     }
 150
 151     return !::TlsGetValue(s_slot);
 152 }
 153
 154 #endif // HAVE_WIN32_THREAD
 155
 156 #ifdef HAVE_BOOST_THREAD
 157
 158 BENCHMARK_FUNC(BoostTLS)
 159 {
 160     static boost::thread_specific_ptr<int> s_ptr;
 161     if ( !s_ptr.get() )
 162         s_ptr.reset(new int(0));
 163
 164     for ( int n = 0; n < NUM_ITER; n++ )
 165     {
 166         if ( n % 2 )
 167             *s_ptr = 0;
 168         else
 169             *s_ptr = n;
 170     }
 171
 172     return !*s_ptr;
 173 }
 174
 175 #endif // HAVE_BOOST_THREAD
 176
 177 BENCHMARK_FUNC(wxTLS)
 178 {
 179     static wxTLS_TYPE(int) s_globalVar;
 180     #define s_global wxTLS_VALUE(s_globalVar)
 181
 182     for ( int n = 0; n < NUM_ITER; n++ )
 183     {
 184         if ( n % 2 )
 185             s_global = 0;
 186         else
 187             s_global = n;
 188     }
 189
 190     return !s_global;
 191 }