| // Copyright (C) 2013 The Android Open Source Project |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions |
| // are met: |
| // 1. Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // 2. Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in the |
| // documentation and/or other materials provided with the distribution. |
| // 3. Neither the name of the project nor the names of its contributors |
| // may be used to endorse or promote products derived from this software |
| // without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| // ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| // OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| // SUCH DAMAGE. |
| |
| #ifndef __GABIXX_CONFIG_H__ |
| #define __GABIXX_CONFIG_H__ |
| |
| // Used to tag functions that never return. |
| // IMPORTANT: This must appear at the left of function definitions, |
| // as in: |
| // _GABIXX_NORETURN <return-type> <name>(....) { ... } |
| #define _GABIXX_NORETURN __attribute__((__noreturn__)) |
| |
| // Use _GABIXX_NOEXCEPT to use the equivalent of the C++11 noexcept |
| // qualifier at the end of function declarations. |
| // |
| // _GABIXX_NOEXCEPT_() only in C++11 mode to use the noexcept() operator. |
| // _GABIXX_NOEXCEPT_CXX11_ONLY uses noexcept in C++11, nothing otherwise. |
| #if __cplusplus >= 201103L |
| # define _GABIXX_NOEXCEPT noexcept |
| # define _GABIXX_NOEXCEPT_(x) noexcept(x) |
| # define _GABIXX_NOEXCEPT_CXX11_ONLY noexcept |
| #else |
| # define _GABIXX_NOEXCEPT throw() |
| # define _GABIXX_NOEXCEPT_(x) /* nothing */ |
| # define _GABIXX_NOEXCEPT_CXX11_ONLY /* nothing */ |
| #endif |
| |
| // Use _GABIXX_HIDDEN to declare internal functions of GAbi++ that should |
| // never be exposed to client code. |
| #define _GABIXX_HIDDEN __attribute__((__visibility__("hidden"))) |
| |
| // Use _GABIXX_WEAK to define a symbol with weak linkage. |
| #define _GABIXX_WEAK __attribute__((__weak__)) |
| |
| // Use _GABIXX_ALWAYS_INLINE to declare a function that shall always be |
| // inlined. Note that the always_inline doesn't make a function inline |
| // per se. |
| #define _GABIXX_ALWAYS_INLINE \ |
| inline __attribute__((__always_inline__)) |
| |
| // _GABIXX_HAS_EXCEPTIONS will be 1 if the current source file is compiled |
| // with exceptions support, or 0 otherwise. |
| #if !defined(__clang__) && !defined(__has_feature) |
| #define __has_feature(x) 0 |
| #endif |
| |
| #if (defined(__clang__) && __has_feature(cxx_exceptions)) || \ |
| (defined(__GNUC__) && defined(__EXCEPTIONS)) |
| #define _GABIXX_HAS_EXCEPTIONS 1 |
| #else |
| #define _GABIXX_HAS_EXCEPTIONS 0 |
| #endif |
| |
| // TODO(digit): Use __atomic_load_acq_rel when available. |
| #define __gabixx_sync_load(address) \ |
| __sync_fetch_and_add((address), (__typeof__(*(address)))0) |
| |
| // Clang provides __sync_swap(), but GCC does not. |
| // IMPORTANT: For GCC, __sync_lock_test_and_set has acquire semantics only |
| // so an explicit __sync_synchronize is needed to ensure a full barrier. |
| // TODO(digit): Use __atomic_swap_acq_rel when available. |
| #if defined(__clang__) |
| # define __gabixx_sync_swap(address,value) __sync_swap((address),(value)) |
| #else |
| # define __gabixx_sync_swap(address, value) \ |
| __extension__ ({ \ |
| __typeof__(*(address)) __ret = __sync_lock_test_and_set((address),(value)); \ |
| __sync_synchronize(); \ |
| __ret; \ |
| }) |
| #endif |
| |
| #endif // __GABIXX_CONFIG_H__ |