233 lines
6.1 KiB
C
233 lines
6.1 KiB
C
/* Pixman uses some non-standard compiler features. This file ensures
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* they exist
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*
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* The features are:
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*
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* FUNC must be defined to expand to the current function
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* PIXMAN_EXPORT should be defined to whatever is required to
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* export functions from a shared library
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* limits limits for various types must be defined
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* inline must be defined
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* force_inline must be defined
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*/
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#if defined (__GNUC__)
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# define FUNC ((const char*) (__PRETTY_FUNCTION__))
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#elif defined (__sun) || (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
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# define FUNC ((const char*) (__func__))
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#else
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# define FUNC ((const char*) ("???"))
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#endif
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#if defined (__GNUC__)
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# define unlikely(expr) __builtin_expect ((expr), 0)
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#else
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# define unlikely(expr) (expr)
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#endif
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#if defined (__GNUC__)
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# define MAYBE_UNUSED __attribute__((unused))
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#else
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# define MAYBE_UNUSED
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#endif
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#ifndef INT16_MIN
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# define INT16_MIN (-32767-1)
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#endif
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#ifndef INT16_MAX
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# define INT16_MAX (32767)
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#endif
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#ifndef INT32_MIN
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# define INT32_MIN (-2147483647-1)
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#endif
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#ifndef INT32_MAX
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# define INT32_MAX (2147483647)
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#endif
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#ifndef UINT32_MIN
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# define UINT32_MIN (0)
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#endif
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#ifndef UINT32_MAX
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# define UINT32_MAX (4294967295U)
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#endif
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#ifndef INT64_MIN
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# define INT64_MIN (-9223372036854775807-1)
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#endif
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#ifndef INT64_MAX
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# define INT64_MAX (9223372036854775807)
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#endif
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#ifndef SIZE_MAX
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# define SIZE_MAX ((size_t)-1)
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#endif
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#ifndef M_PI
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# define M_PI 3.14159265358979323846
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#endif
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#ifdef _MSC_VER
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/* 'inline' is available only in C++ in MSVC */
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# define inline __inline
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# define force_inline __forceinline
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# define noinline __declspec(noinline)
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#elif defined __GNUC__ || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
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# define inline __inline__
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# define force_inline __inline__ __attribute__ ((__always_inline__))
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# define noinline __attribute__((noinline))
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#else
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# ifndef force_inline
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# define force_inline inline
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# endif
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# ifndef noinline
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# define noinline
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# endif
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#endif
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/* GCC visibility */
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#if defined(__GNUC__) && __GNUC__ >= 4 && !defined(_WIN32)
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# define PIXMAN_EXPORT __attribute__ ((visibility("default")))
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/* Sun Studio 8 visibility */
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#elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550)
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# define PIXMAN_EXPORT __global
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#else
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# define PIXMAN_EXPORT
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#endif
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/* member offsets */
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#define CONTAINER_OF(type, member, data) \
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((type *)(((uint8_t *)data) - offsetof (type, member)))
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/* TLS */
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#if defined(PIXMAN_NO_TLS)
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# define PIXMAN_DEFINE_THREAD_LOCAL(type, name) \
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static type name
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# define PIXMAN_GET_THREAD_LOCAL(name) \
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(&name)
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#elif defined(TLS)
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# define PIXMAN_DEFINE_THREAD_LOCAL(type, name) \
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static TLS type name
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# define PIXMAN_GET_THREAD_LOCAL(name) \
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(&name)
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#elif defined(__MINGW32__)
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# define _NO_W32_PSEUDO_MODIFIERS
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# include <windows.h>
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# define PIXMAN_DEFINE_THREAD_LOCAL(type, name) \
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static volatile int tls_ ## name ## _initialized = 0; \
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static void *tls_ ## name ## _mutex = NULL; \
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static unsigned tls_ ## name ## _index; \
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\
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static type * \
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tls_ ## name ## _alloc (void) \
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{ \
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type *value = calloc (1, sizeof (type)); \
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if (value) \
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TlsSetValue (tls_ ## name ## _index, value); \
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return value; \
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} \
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\
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static force_inline type * \
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tls_ ## name ## _get (void) \
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{ \
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type *value; \
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if (!tls_ ## name ## _initialized) \
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{ \
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if (!tls_ ## name ## _mutex) \
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{ \
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void *mutex = CreateMutexA (NULL, 0, NULL); \
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if (InterlockedCompareExchangePointer ( \
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&tls_ ## name ## _mutex, mutex, NULL) != NULL) \
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{ \
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CloseHandle (mutex); \
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} \
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} \
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WaitForSingleObject (tls_ ## name ## _mutex, 0xFFFFFFFF); \
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if (!tls_ ## name ## _initialized) \
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{ \
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tls_ ## name ## _index = TlsAlloc (); \
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tls_ ## name ## _initialized = 1; \
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} \
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ReleaseMutex (tls_ ## name ## _mutex); \
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} \
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if (tls_ ## name ## _index == 0xFFFFFFFF) \
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return NULL; \
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value = TlsGetValue (tls_ ## name ## _index); \
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if (!value) \
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value = tls_ ## name ## _alloc (); \
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return value; \
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}
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# define PIXMAN_GET_THREAD_LOCAL(name) \
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tls_ ## name ## _get ()
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#elif defined(_MSC_VER)
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# define PIXMAN_DEFINE_THREAD_LOCAL(type, name) \
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static __declspec(thread) type name
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# define PIXMAN_GET_THREAD_LOCAL(name) \
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(&name)
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#elif defined(HAVE_PTHREAD_SETSPECIFIC)
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#include <pthread.h>
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# define PIXMAN_DEFINE_THREAD_LOCAL(type, name) \
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static pthread_once_t tls_ ## name ## _once_control = PTHREAD_ONCE_INIT; \
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static pthread_key_t tls_ ## name ## _key; \
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\
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static void \
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tls_ ## name ## _destroy_value (void *value) \
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{ \
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free (value); \
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} \
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\
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static void \
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tls_ ## name ## _make_key (void) \
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{ \
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pthread_key_create (&tls_ ## name ## _key, \
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tls_ ## name ## _destroy_value); \
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} \
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\
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static type * \
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tls_ ## name ## _alloc (void) \
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{ \
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type *value = calloc (1, sizeof (type)); \
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if (value) \
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pthread_setspecific (tls_ ## name ## _key, value); \
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return value; \
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} \
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\
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static force_inline type * \
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tls_ ## name ## _get (void) \
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{ \
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type *value = NULL; \
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if (pthread_once (&tls_ ## name ## _once_control, \
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tls_ ## name ## _make_key) == 0) \
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{ \
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value = pthread_getspecific (tls_ ## name ## _key); \
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if (!value) \
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value = tls_ ## name ## _alloc (); \
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} \
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return value; \
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}
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# define PIXMAN_GET_THREAD_LOCAL(name) \
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tls_ ## name ## _get ()
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#else
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# 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."
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#endif
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