source/libs/pixman/pixman-src/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 #if defined (__GNUC__)
  22 #  define unlikely(expr) __builtin_expect ((expr), 0)
  23 #else
  24 #  define unlikely(expr)  (expr)
  25 #endif
  26
  27 #if defined (__GNUC__)
  28 #  define MAYBE_UNUSED  __attribute__((unused))
  29 #else
  30 #  define MAYBE_UNUSED
  31 #endif
  32
  33 #ifndef INT16_MIN
  34 # define INT16_MIN              (-32767-1)
  35 #endif
  36
  37 #ifndef INT16_MAX
  38 # define INT16_MAX              (32767)
  39 #endif
  40
  41 #ifndef INT32_MIN
  42 # define INT32_MIN              (-2147483647-1)
  43 #endif
  44
  45 #ifndef INT32_MAX
  46 # define INT32_MAX              (2147483647)
  47 #endif
  48
  49 #ifndef UINT32_MIN
  50 # define UINT32_MIN             (0)
  51 #endif
  52
  53 #ifndef UINT32_MAX
  54 # define UINT32_MAX             (4294967295U)
  55 #endif
  56
  57 #ifndef INT64_MIN
  58 # define INT64_MIN              (-9223372036854775807-1)
  59 #endif
  60
  61 #ifndef INT64_MAX
  62 # define INT64_MAX              (9223372036854775807)
  63 #endif
  64
  65 #ifndef SIZE_MAX
  66 # define SIZE_MAX               ((size_t)-1)
  67 #endif
  68
  69
  70 #ifndef M_PI
  71 # define M_PI                   3.14159265358979323846
  72 #endif
  73
  74 #ifdef _MSC_VER
  75 /* 'inline' is available only in C++ in MSVC */
  76 #   define inline __inline
  77 #   define force_inline __forceinline
  78 #   define noinline __declspec(noinline)
  79 #elif defined __GNUC__ || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
  80 #   define inline __inline__
  81 #   define force_inline __inline__ __attribute__ ((__always_inline__))
  82 #   define noinline __attribute__((noinline))
  83 #else
  84 #   ifndef force_inline
  85 #      define force_inline inline
  86 #   endif
  87 #   ifndef noinline
  88 #      define noinline
  89 #   endif
  90 #endif
  91
  92 /* GCC visibility */
  93 #if defined(__GNUC__) && __GNUC__ >= 4 && !defined(_WIN32)
  94 #   define PIXMAN_EXPORT
  95 /* Sun Studio 8 visibility */
  96 #elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550)
  97 #   define PIXMAN_EXPORT __global
  98 #else
  99 #   define PIXMAN_EXPORT
 100 #endif
 101
 102 /* member offsets */
 103 #define CONTAINER_OF(type, member, data)                                \
 104     ((type *)(((uint8_t *)data) - offsetof (type, member)))
 105
 106 /* TLS */
 107 #if defined(PIXMAN_NO_TLS)
 108
 109 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
 110     static type name
 111 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
 112     (&name)
 113
 114 #elif defined(TLS)
 115
 116 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
 117     static TLS type name
 118 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
 119     (&name)
 120
 121 #elif defined(__MINGW32__)
 122
 123 #   define _NO_W32_PSEUDO_MODIFIERS
 124 #   include <windows.h>
 125
 126 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
 127     static volatile int tls_ ## name ## _initialized = 0;               \
 128     static void *tls_ ## name ## _mutex = NULL;                         \
 129     static unsigned tls_ ## name ## _index;                             \
 130                                                                         \
 131     static type *                                                       \
 132     tls_ ## name ## _alloc (void)                                       \
 133     {                                                                   \
 134         type *value = calloc (1, sizeof (type));                        \
 135         if (value)                                                      \
 136             TlsSetValue (tls_ ## name ## _index, value);                \
 137         return value;                                                   \
 138     }                                                                   \
 139                                                                         \
 140     static force_inline type *                                          \
 141     tls_ ## name ## _get (void)                                         \
 142     {                                                                   \
 143         type *value;                                                    \
 144         if (!tls_ ## name ## _initialized)                              \
 145         {                                                               \
 146             if (!tls_ ## name ## _mutex)                                \
 147             {                                                           \
 148                 void *mutex = CreateMutexA (NULL, 0, NULL);             \
 149                 if (InterlockedCompareExchangePointer (                 \
 150                         &tls_ ## name ## _mutex, mutex, NULL) != NULL)  \
 151                 {                                                       \
 152                     CloseHandle (mutex);                                \
 153                 }                                                       \
 154             }                                                           \
 155             WaitForSingleObject (tls_ ## name ## _mutex, 0xFFFFFFFF);   \
 156             if (!tls_ ## name ## _initialized)                          \
 157             {                                                           \
 158                 tls_ ## name ## _index = TlsAlloc ();                   \
 159                 tls_ ## name ## _initialized = 1;                       \
 160             }                                                           \
 161             ReleaseMutex (tls_ ## name ## _mutex);                      \
 162         }                                                               \
 163         if (tls_ ## name ## _index == 0xFFFFFFFF)                       \
 164             return NULL;                                                \
 165         value = TlsGetValue (tls_ ## name ## _index);                   \
 166         if (!value)                                                     \
 167             value = tls_ ## name ## _alloc ();                          \
 168         return value;                                                   \
 169     }
 170
 171 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
 172     tls_ ## name ## _get ()
 173
 174 #elif defined(_MSC_VER)
 175
 176 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
 177     static __declspec(thread) type name
 178 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
 179     (&name)
 180
 181 #elif defined(HAVE_PTHREADS)
 182
 183 #include <pthread.h>
 184
 185 #  define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                        \
 186     static pthread_once_t tls_ ## name ## _once_control = PTHREAD_ONCE_INIT; \
 187     static pthread_key_t tls_ ## name ## _key;                          \
 188                                                                         \
 189     static void                                                         \
 190     tls_ ## name ## _destroy_value (void *value)                        \
 191     {                                                                   \
 192         free (value);                                                   \
 193     }                                                                   \
 194                                                                         \
 195     static void                                                         \
 196     tls_ ## name ## _make_key (void)                                    \
 197     {                                                                   \
 198         pthread_key_create (&tls_ ## name ## _key,                      \
 199                             tls_ ## name ## _destroy_value);            \
 200     }                                                                   \
 201                                                                         \
 202     static type *                                                       \
 203     tls_ ## name ## _alloc (void)                                       \
 204     {                                                                   \
 205         type *value = calloc (1, sizeof (type));                        \
 206         if (value)                                                      \
 207             pthread_setspecific (tls_ ## name ## _key, value);          \
 208         return value;                                                   \
 209     }                                                                   \
 210                                                                         \
 211     static force_inline type *                                          \
 212     tls_ ## name ## _get (void)                                         \
 213     {                                                                   \
 214         type *value = NULL;                                             \
 215         if (pthread_once (&tls_ ## name ## _once_control,               \
 216                           tls_ ## name ## _make_key) == 0)              \
 217         {                                                               \
 218             value = pthread_getspecific (tls_ ## name ## _key);         \
 219             if (!value)                                                 \
 220                 value = tls_ ## name ## _alloc ();                      \
 221         }                                                               \
 222         return value;                                                   \
 223     }
 224
 225 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
 226     tls_ ## name ## _get ()
 227
 228 #else
 229
 230 #    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."
 231
 232 #endif