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 #   define noinline __declspec(noinline)
  54 #elif defined __GNUC__ || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
  55 #   define inline __inline__
  56 #   define force_inline __inline__ __attribute__ ((__always_inline__))
  57 #   define noinline __attribute__((noinline))
  58 #else
  59 #   ifndef force_inline
  60 #      define force_inline inline
  61 #   endif
  62 #   ifndef noinline
  63 #      define noinline
  64 #   endif
  65 #endif
  66
  67 /* GCC visibility */
  68 #if defined(__GNUC__) && __GNUC__ >= 4 && !defined(_WIN32)
  69 #   define PIXMAN_EXPORT __attribute__ ((visibility("default")))
  70 /* Sun Studio 8 visibility */
  71 #elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550)
  72 #   define PIXMAN_EXPORT __global
  73 #else
  74 #   define PIXMAN_EXPORT
  75 #endif
  76
  77 /* TLS */
  78 #if defined(PIXMAN_NO_TLS)
  79
  80 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
  81     static type name
  82 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
  83     (&name)
  84
  85 #elif defined(TOOLCHAIN_SUPPORTS__THREAD)
  86
  87 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
  88     static __thread type name
  89 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
  90     (&name)
  91
  92 #elif defined(__MINGW32__)
  93
  94 #   define _NO_W32_PSEUDO_MODIFIERS
  95 #   include <windows.h>
  96
  97 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
  98     static volatile int tls_ ## name ## _initialized = 0;               \
  99     static void *tls_ ## name ## _mutex = NULL;                         \
 100     static unsigned tls_ ## name ## _index;                             \
 101                                                                         \
 102     static type *                                                       \
 103     tls_ ## name ## _alloc (void)                                       \
 104     {                                                                   \
 105         type *value = calloc (1, sizeof (type));                        \
 106         if (value)                                                      \
 107             TlsSetValue (tls_ ## name ## _index, value);                \
 108         return value;                                                   \
 109     }                                                                   \
 110                                                                         \
 111     static force_inline type *                                          \
 112     tls_ ## name ## _get (void)                                         \
 113     {                                                                   \
 114         type *value;                                                    \
 115         if (!tls_ ## name ## _initialized)                              \
 116         {                                                               \
 117             if (!tls_ ## name ## _mutex)                                \
 118             {                                                           \
 119                 void *mutex = CreateMutexA (NULL, 0, NULL);             \
 120                 if (InterlockedCompareExchangePointer (                 \
 121                         &tls_ ## name ## _mutex, mutex, NULL) != NULL)  \
 122                 {                                                       \
 123                     CloseHandle (mutex);                                \
 124                 }                                                       \
 125             }                                                           \
 126             WaitForSingleObject (tls_ ## name ## _mutex, 0xFFFFFFFF);   \
 127             if (!tls_ ## name ## _initialized)                          \
 128             {                                                           \
 129                 tls_ ## name ## _index = TlsAlloc ();                   \
 130                 tls_ ## name ## _initialized = 1;                       \
 131             }                                                           \
 132             ReleaseMutex (tls_ ## name ## _mutex);                      \
 133         }                                                               \
 134         if (tls_ ## name ## _index == 0xFFFFFFFF)                       \
 135             return NULL;                                                \
 136         value = TlsGetValue (tls_ ## name ## _index);                   \
 137         if (!value)                                                     \
 138             value = tls_ ## name ## _alloc ();                          \
 139         return value;                                                   \
 140     }
 141
 142 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
 143     tls_ ## name ## _get ()
 144
 145 #elif defined(_MSC_VER)
 146
 147 #   define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                       \
 148     static __declspec(thread) type name
 149 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
 150     (&name)
 151
 152 #elif defined(HAVE_PTHREAD_SETSPECIFIC)
 153
 154 #include <pthread.h>
 155
 156 #  define PIXMAN_DEFINE_THREAD_LOCAL(type, name)                        \
 157     static pthread_once_t tls_ ## name ## _once_control = PTHREAD_ONCE_INIT; \
 158     static pthread_key_t tls_ ## name ## _key;                          \
 159                                                                         \
 160     static void                                                         \
 161     tls_ ## name ## _destroy_value (void *value)                        \
 162     {                                                                   \
 163         free (value);                                                   \
 164     }                                                                   \
 165                                                                         \
 166     static void                                                         \
 167     tls_ ## name ## _make_key (void)                                    \
 168     {                                                                   \
 169         pthread_key_create (&tls_ ## name ## _key,                      \
 170                             tls_ ## name ## _destroy_value);            \
 171     }                                                                   \
 172                                                                         \
 173     static type *                                                       \
 174     tls_ ## name ## _alloc (void)                                       \
 175     {                                                                   \
 176         type *value = calloc (1, sizeof (type));                        \
 177         if (value)                                                      \
 178             pthread_setspecific (tls_ ## name ## _key, value);          \
 179         return value;                                                   \
 180     }                                                                   \
 181                                                                         \
 182     static force_inline type *                                          \
 183     tls_ ## name ## _get (void)                                         \
 184     {                                                                   \
 185         type *value = NULL;                                             \
 186         if (pthread_once (&tls_ ## name ## _once_control,               \
 187                           tls_ ## name ## _make_key) == 0)              \
 188         {                                                               \
 189             value = pthread_getspecific (tls_ ## name ## _key);         \
 190             if (!value)                                                 \
 191                 value = tls_ ## name ## _alloc ();                      \
 192         }                                                               \
 193         return value;                                                   \
 194     }                                                                   \
 195     extern int no_such_variable
 196
 197 #   define PIXMAN_GET_THREAD_LOCAL(name)                                \
 198     tls_ ## name ## _get ()
 199
 200 #else
 201
 202 #    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."
 203
 204 #endif