+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
*
-* Copyright (C) 1997-2012, International Business Machines
+* Copyright (C) 1997-2016, International Business Machines
* Corporation and others. All Rights Reserved.
*
******************************************************************************
*
* Do not use ptrdiff_t since it is signed. size_t is unsigned.
*/
-#if !defined(__intptr_t_defined) && !defined(UINTPTR_MAX)
+/* TODO: This check fails on some z environments. Filed a ticket #9357 for this. */
+#if !defined(__intptr_t_defined) && !defined(UINTPTR_MAX) && (U_PLATFORM != U_PF_OS390)
typedef size_t uintptr_t;
#endif
#ifdef U_HAVE_NL_LANGINFO_CODESET
/* Use the predefined value. */
-#elif U_PLATFORM_HAS_WIN32_API
+#elif U_PLATFORM_USES_ONLY_WIN32_API || U_PLATFORM == U_PF_ANDROID || U_PLATFORM == U_PF_QNX
# define U_HAVE_NL_LANGINFO_CODESET 0
#else
# define U_HAVE_NL_LANGINFO_CODESET 1
#ifdef U_TZSET
/* Use the predefined value. */
#elif U_PLATFORM_USES_ONLY_WIN32_API
+ // UWP doesn't support tzset or environment variables for tz
+#if U_PLATFORM_HAS_WINUWP_API == 0
# define U_TZSET _tzset
+#endif
#elif U_PLATFORM == U_PF_OS400
/* not defined */
#else
# define U_TZSET tzset
#endif
-#ifdef U_TIMEZONE
+#if defined(U_TIMEZONE) || defined(U_HAVE_TIMEZONE)
/* Use the predefined value. */
+#elif U_PLATFORM == U_PF_ANDROID
+# define U_TIMEZONE timezone
#elif U_PLATFORM_IS_LINUX_BASED
-# define U_TIMEZONE __timezone
+# if defined(__UCLIBC__)
+ /* uClibc does not have __timezone or _timezone. */
+# elif defined(_NEWLIB_VERSION)
+# define U_TIMEZONE _timezone
+# elif defined(__GLIBC__)
+ /* glibc */
+# define U_TIMEZONE __timezone
+# endif
#elif U_PLATFORM_USES_ONLY_WIN32_API
# define U_TIMEZONE _timezone
+#elif U_PLATFORM == U_PF_BSD && !defined(__NetBSD__)
+ /* not defined */
#elif U_PLATFORM == U_PF_OS400
/* not defined */
+#elif U_PLATFORM == U_PF_IPHONE
+ /* not defined */
#else
# define U_TIMEZONE timezone
#endif
#ifdef U_TZNAME
/* Use the predefined value. */
#elif U_PLATFORM_USES_ONLY_WIN32_API
+ /* not usable on all windows platforms */
+#if U_PLATFORM_HAS_WINUWP_API == 0
# define U_TZNAME _tzname
+#endif
#elif U_PLATFORM == U_PF_OS400
/* not defined */
#else
#ifdef U_HAVE_MMAP
/* Use the predefined value. */
-#elif U_PLATFORM_HAS_WIN32_API
+#elif U_PLATFORM_USES_ONLY_WIN32_API
# define U_HAVE_MMAP 0
#else
# define U_HAVE_MMAP 1
*/
#ifdef U_HAVE_DIRENT_H
/* Use the predefined value. */
-#elif U_PLATFORM_HAS_WIN32_API
+#elif U_PLATFORM_USES_ONLY_WIN32_API
# define U_HAVE_DIRENT_H 0
#else
# define U_HAVE_DIRENT_H 1
*/
#ifdef U_HAVE_GCC_ATOMICS
/* Use the predefined value. */
-#elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 401)
+#elif U_PLATFORM == U_PF_MINGW
+ #define U_HAVE_GCC_ATOMICS 0
+#elif U_GCC_MAJOR_MINOR >= 404 || defined(__clang__)
+ /* TODO: Intel icc and IBM xlc on AIX also support gcc atomics. (Intel originated them.)
+ * Add them for these compilers.
+ * Note: Clang sets __GNUC__ defines for version 4.2, so misses the 4.4 test here.
+ */
# define U_HAVE_GCC_ATOMICS 1
#else
# define U_HAVE_GCC_ATOMICS 0
/** @} */
-/*===========================================================================*/
-/** @{ Code alignment */
-/*===========================================================================*/
-
/**
- * \def U_ALIGN_CODE
- * This is used to align code fragments to a specific byte boundary.
- * This is useful for getting consistent performance test results.
+ * \def U_HAVE_STD_ATOMICS
+ * Defines whether the standard C++11 <atomic> is available.
+ * ICU will use this when avialable,
+ * otherwise will fall back to compiler or platform specific alternatives.
* @internal
*/
-#ifdef U_ALIGN_CODE
+#ifdef U_HAVE_STD_ATOMICS
/* Use the predefined value. */
-#elif defined(_MSC_VER) && defined(_M_IX86) && !defined(_MANAGED)
-# define U_ALIGN_CODE(boundarySize) __asm align boundarySize
-#else
-# define U_ALIGN_CODE(boundarySize)
+#elif U_CPLUSPLUS_VERSION < 11
+ /* Not C++11, disable use of atomics */
+# define U_HAVE_STD_ATOMICS 0
+#elif __clang__ && __clang_major__==3 && __clang_minor__<=1
+ /* Clang 3.1, has atomic variable initializer bug. */
+# define U_HAVE_STD_ATOMICS 0
+#else
+ /* U_HAVE_ATOMIC is typically set by an autoconf test of #include <atomic> */
+ /* Can be set manually, or left undefined, on platforms without autoconf. */
+# if defined(U_HAVE_ATOMIC) && U_HAVE_ATOMIC
+# define U_HAVE_STD_ATOMICS 1
+# else
+# define U_HAVE_STD_ATOMICS 0
+# endif
#endif
-/** @} */
+
+/**
+ * \def U_HAVE_CLANG_ATOMICS
+ * Defines whether Clang c11 style built-in atomics are avaialable.
+ * These are used in preference to gcc atomics when both are available.
+ */
+#ifdef U_HAVE_CLANG_ATOMICS
+ /* Use the predefined value. */
+#elif __has_builtin(__c11_atomic_load) && \
+ __has_builtin(__c11_atomic_store) && \
+ __has_builtin(__c11_atomic_fetch_add) && \
+ __has_builtin(__c11_atomic_fetch_sub)
+# define U_HAVE_CLANG_ATOMICS 1
+#else
+# define U_HAVE_CLANG_ATOMICS 0
+#endif
/*===========================================================================*/
/** @{ Programs used by ICU code */
*/
U_INTERNAL const char* U_EXPORT2 uprv_tzname(int n);
+/**
+ * Reset the global tzname cache.
+ * @internal
+ */
+U_INTERNAL void uprv_tzname_clear_cache();
+
/**
* Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970.
* This function is affected by 'faketime' and should be the bottleneck for all user-visible ICU time functions.
projects / apple / icu.git / blobdiff