pixman/pixman-compiler.h

   1 /* Pixman uses some non-standard compiler features. This file ensures
   2  * they exist
   3  *
   4  * The features are:
   5  *
   6  *    FUNC           must be defined to expand to the current function
   7  *    PIXMAN_EXPORT  should be defined to whatever is required to
   8  *                   export functions from a shared library
   9  *    limits         limits for various types must be defined
  10  *    inline         must be defined
  11  *    force_inline   must be defined
  12  */
  13 #if defined (__GNUC__)
  14 #  define FUNC     ((const char*) (__PRETTY_FUNCTION__))
  15 #elif defined (__sun) || (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
  16 #  define FUNC     ((const char*) (__func__))
  17 #else
  18 #  define FUNC     ((const char*) ("???"))
  19 #endif
  20
  21 #ifndef INT16_MIN
  22 # define INT16_MIN              (-32767-1)
  23 #endif
  24
  25 #ifndef INT16_MAX
  26 # define INT16_MAX              (32767)
  27 #endif
  28
  29 #ifndef INT32_MIN
  30 # define INT32_MIN              (-2147483647-1)
  31 #endif
  32
  33 #ifndef INT32_MAX
  34 # define INT32_MAX              (2147483647)
  35 #endif
  36
  37 #ifndef UINT32_MIN
  38 # define UINT32_MIN             (0)
  39 #endif
  40
  41 #ifndef UINT32_MAX
  42 # define UINT32_MAX             (4294967295U)
  43 #endif
  44
  45 #ifndef M_PI
  46 # define M_PI                   3.14159265358979323846
  47 #endif
  48
  49 #ifdef _MSC_VER
  50 /* 'inline' is available only in C++ in MSVC */
  51 #   define inline __inline
  52 #   define force_inline __forceinline
  53 #elif defined __GNUC__ || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
  54 #   define inline __inline__
  55 #   define force_inline __inline__ __attribute__ ((__always_inline__))
  56 #else
  57 #   ifndef force_inline
  58 #      define force_inline inline
  59 #   endif
  60 #endif
  61
  62 /* GCC visibility */
  63 #if defined(__GNUC__) && __GNUC__ >= 4
  64 #   define PIXMAN_EXPORT __attribute__ ((visibility("default")))
  65 /* Sun Studio 8 visibility */
  66 #elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550)
  67 #   define PIXMAN_EXPORT __global
  68 #else
  69 #   define PIXMAN_EXPORT
  70 #endif
  71
  72 /* TLS */
  73 #if defined(PIXMAN_NO_TLS)
  74
  75 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
  76     static type name
  77 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
  78     (&name)
  79
  80 #elif defined(TOOLCHAIN_SUPPORTS__THREAD)
  81
  82 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
  83     static __thread type name
  84 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
  85     (&name)
  86
  87 #elif defined(__MINGW32__)
  88
  89 #   define _NO_W32_PSEUDO_MODIFIERS
  90 #   include <windows.h>
  91
  92 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
  93     static volatile int tls_ ## name ## _initialized = 0;               \
  94     static void *tls_ ## name ## _mutex = NULL;                         \
  95     static unsigned tls_ ## name ## _index;                             \
  96                                                                         \
  97     static type *                                                       \
  98     tls_ ## name ## _alloc (void)                                       \
  99     {                                                                   \
 100         type *value = calloc (1, sizeof (type));                        \
 101         if (value)                                                      \
 102             TlsSetValue (tls_ ## name ## _index, value);                \
 103         return value;                                                   \
 104     }                                                                   \
 105                                                                         \
 106     static force_inline type *                                          \
 107     tls_ ## name ## _get (void)                                         \
 108     {                                                                   \
 109         type *value;                                                    \
 110         if (!tls_ ## name ## _initialized)                              \
 111         {                                                               \
 112             if (!tls_ ## name ## _mutex)                                \
 113             {                                                           \
 114                 void *mutex = CreateMutexA (NULL, 0, NULL);             \
 115                 if (InterlockedCompareExchangePointer (                 \
 116                         &tls_ ## name ## _mutex, mutex, NULL) != NULL)  \
 117                 {                                                       \
 118                     CloseHandle (mutex);                                \
 119                 }                                                       \
 120             }                                                           \
 121             WaitForSingleObject (tls_ ## name ## _mutex, 0xFFFFFFFF);   \
 122             if (!tls_ ## name ## _initialized)                          \
 123             {                                                           \
 124                 tls_ ## name ## _index = TlsAlloc ();                   \
 125                 tls_ ## name ## _initialized = 1;                       \
 126             }                                                           \
 127             ReleaseMutex (tls_ ## name ## _mutex);                      \
 128         }                                                               \
 129         if (tls_ ## name ## _index == 0xFFFFFFFF)                       \
 130             return NULL;                                                \
 131         value = TlsGetValue (tls_ ## name ## _index);                   \
 132         if (!value)                                                     \
 133             value = tls_ ## name ## _alloc ();                          \
 134         return value;                                                   \
 135     }
 136
 137 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
 138     tls_ ## name ## _get ()
 139
 140 #elif defined(_MSC_VER)
 141
 142 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
 143     static __declspec(thread) type name
 144 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
 145     (&name)
 146
 147 #elif defined(HAVE_PTHREAD_SETSPECIFIC)
 148
 149 #include <pthread.h>
 150
 151 #  define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                        \
 152     static pthread_once_t tls_ ## name ## _once_control = PTHREAD_ONCE_INIT; \
 153     static pthread_key_t tls_ ## name ## _key;                          \
 154                                                                         \
 155     static void                                                         \
 156     tls_ ## name ## _destroy_value (void *value)                        \
 157     {                                                                   \
 158         free (value);                                                   \
 159     }                                                                   \
 160                                                                         \
 161     static void                                                         \
 162     tls_ ## name ## _make_key (void)                                    \
 163     {                                                                   \
 164         pthread_key_create (&tls_ ## name ## _key,                      \
 165                             tls_ ## name ## _destroy_value);            \
 166     }                                                                   \
 167                                                                         \
 168     static type *                                                       \
 169     tls_ ## name ## _alloc (void)                                       \
 170     {                                                                   \
 171         type *value = calloc (1, sizeof (type));                        \
 172         if (value)                                                      \
 173             pthread_setspecific (tls_ ## name ## _key, value);          \
 174         return value;                                                   \
 175     }                                                                   \
 176                                                                         \
 177     static force_inline type *                                          \
 178     tls_ ## name ## _get (void)                                         \
 179     {                                                                   \
 180         type *value = NULL;                                             \
 181         if (pthread_once (&tls_ ## name ## _once_control,               \
 182                           tls_ ## name ## _make_key) == 0)              \
 183         {                                                               \
 184             value = pthread_getspecific (tls_ ## name ## _key);         \
 185             if (!value)                                                 \
 186                 value = tls_ ## name ## _alloc ();                      \
 187         }                                                               \
 188         return value;                                                   \
 189     }
 190
 191 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
 192     tls_ ## name ## _get ()
 193
 194 #else
 195
 196 #    error "Unknown thread local support for this system. Pixman will not work with multiple threads. Define PIXMAN_NO_TLS to acknowledge and accept this limitation and compile pixman without thread-safety support."
 197
 198 #endif