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authorChanho Park <chanho61.park@samsung.com>2014-12-11 18:55:56 +0900
committerChanho Park <chanho61.park@samsung.com>2014-12-11 18:55:56 +0900
commit08c1e93fa36a49f49325a07fe91ff92c964c2b6c (patch)
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parentbb4dd8289b351fae6b55e303f189127a394a1edd (diff)
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Imported Upstream version 1.57.0upstream/1.57.0
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+/*
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * Copyright (c) 2014 Andrey Semashev
+ */
+/*!
+ * \file atomic/detail/ops_gcc_atomic.hpp
+ *
+ * This header contains implementation of the \c operations template.
+ */
+
+#ifndef BOOST_ATOMIC_DETAIL_OPS_GCC_ATOMIC_HPP_INCLUDED_
+#define BOOST_ATOMIC_DETAIL_OPS_GCC_ATOMIC_HPP_INCLUDED_
+
+#include <boost/memory_order.hpp>
+#include <boost/atomic/detail/config.hpp>
+#include <boost/atomic/detail/storage_type.hpp>
+#include <boost/atomic/detail/operations_fwd.hpp>
+#include <boost/atomic/capabilities.hpp>
+#if defined(__clang__) && (defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG8B) || defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG16B))
+#include <boost/atomic/detail/ops_gcc_x86_dcas.hpp>
+#include <boost/atomic/detail/ops_cas_based.hpp>
+#endif
+
+#if __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE || __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE ||\
+ __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE || __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE ||\
+ __GCC_ATOMIC_CHAR_LOCK_FREE != BOOST_ATOMIC_CHAR_LOCK_FREE || __GCC_ATOMIC_BOOL_LOCK_FREE != BOOST_ATOMIC_BOOL_LOCK_FREE ||\
+ __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE
+// There are platforms where we need to use larger storage types
+#include <boost/atomic/detail/int_sizes.hpp>
+#include <boost/atomic/detail/ops_extending_cas_based.hpp>
+#endif
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+#if defined(__INTEL_COMPILER)
+// This is used to suppress warning #32013 described below for Intel Compiler.
+// In debug builds the compiler does not inline any functions, so basically
+// every atomic function call results in this warning. I don't know any other
+// way to selectively disable just this one warning.
+#pragma system_header
+#endif
+
+namespace boost {
+namespace atomics {
+namespace detail {
+
+/*!
+ * The function converts \c boost::memory_order values to the compiler-specific constants.
+ *
+ * NOTE: The intention is that the function is optimized away by the compiler, and the
+ * compiler-specific constants are passed to the intrinsics. I know constexpr doesn't
+ * work in this case because the standard atomics interface require memory ordering
+ * constants to be passed as function arguments, at which point they stop being constexpr.
+ * However it is crucial that the compiler sees constants and not runtime values,
+ * because otherwise it just ignores the ordering value and always uses seq_cst.
+ * This is the case with Intel C++ Compiler 14.0.3 (Composer XE 2013 SP1, update 3) and
+ * gcc 4.8.2. Intel Compiler issues a warning in this case:
+ *
+ * warning #32013: Invalid memory order specified. Defaulting to seq_cst memory order.
+ *
+ * while gcc acts silently.
+ *
+ * To mitigate the problem ALL functions, including the atomic<> members must be
+ * declared with BOOST_FORCEINLINE. In this case the compilers are able to see that
+ * all functions are called with constant orderings and call intrinstcts properly.
+ *
+ * Unfortunately, this still doesn't work in debug mode as the compiler doesn't
+ * inline functions even when marked with BOOST_FORCEINLINE. In this case all atomic
+ * operaions will be executed with seq_cst semantics.
+ */
+BOOST_FORCEINLINE BOOST_CONSTEXPR int convert_memory_order_to_gcc(memory_order order) BOOST_NOEXCEPT
+{
+ return (order == memory_order_relaxed ? __ATOMIC_RELAXED : (order == memory_order_consume ? __ATOMIC_CONSUME :
+ (order == memory_order_acquire ? __ATOMIC_ACQUIRE : (order == memory_order_release ? __ATOMIC_RELEASE :
+ (order == memory_order_acq_rel ? __ATOMIC_ACQ_REL : __ATOMIC_SEQ_CST)))));
+}
+
+template< typename T >
+struct gcc_atomic_operations
+{
+ typedef T storage_type;
+
+ static BOOST_FORCEINLINE void store(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ __atomic_store_n(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
+ }
+
+ static BOOST_FORCEINLINE storage_type load(storage_type const volatile& storage, memory_order order) BOOST_NOEXCEPT
+ {
+ return __atomic_load_n(&storage, atomics::detail::convert_memory_order_to_gcc(order));
+ }
+
+ static BOOST_FORCEINLINE storage_type fetch_add(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ return __atomic_fetch_add(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
+ }
+
+ static BOOST_FORCEINLINE storage_type fetch_sub(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ return __atomic_fetch_sub(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
+ }
+
+ static BOOST_FORCEINLINE storage_type exchange(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ return __atomic_exchange_n(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
+ }
+
+ static BOOST_FORCEINLINE bool compare_exchange_strong(
+ storage_type volatile& storage, storage_type& expected, storage_type desired, memory_order success_order, memory_order failure_order) BOOST_NOEXCEPT
+ {
+ return __atomic_compare_exchange_n
+ (
+ &storage, &expected, desired, false,
+ atomics::detail::convert_memory_order_to_gcc(success_order),
+ atomics::detail::convert_memory_order_to_gcc(failure_order)
+ );
+ }
+
+ static BOOST_FORCEINLINE bool compare_exchange_weak(
+ storage_type volatile& storage, storage_type& expected, storage_type desired, memory_order success_order, memory_order failure_order) BOOST_NOEXCEPT
+ {
+ return __atomic_compare_exchange_n
+ (
+ &storage, &expected, desired, true,
+ atomics::detail::convert_memory_order_to_gcc(success_order),
+ atomics::detail::convert_memory_order_to_gcc(failure_order)
+ );
+ }
+
+ static BOOST_FORCEINLINE storage_type fetch_and(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ return __atomic_fetch_and(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
+ }
+
+ static BOOST_FORCEINLINE storage_type fetch_or(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ return __atomic_fetch_or(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
+ }
+
+ static BOOST_FORCEINLINE storage_type fetch_xor(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ return __atomic_fetch_xor(&storage, v, atomics::detail::convert_memory_order_to_gcc(order));
+ }
+
+ static BOOST_FORCEINLINE bool test_and_set(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
+ {
+ return __atomic_test_and_set(&storage, atomics::detail::convert_memory_order_to_gcc(order));
+ }
+
+ static BOOST_FORCEINLINE void clear(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
+ {
+ __atomic_clear(const_cast< storage_type* >(&storage), atomics::detail::convert_memory_order_to_gcc(order));
+ }
+
+ static BOOST_FORCEINLINE bool is_lock_free(storage_type const volatile& storage) BOOST_NOEXCEPT
+ {
+ return __atomic_is_lock_free(sizeof(storage_type), &storage);
+ }
+};
+
+#if BOOST_ATOMIC_INT128_LOCK_FREE > 0
+#if defined(__clang__) && defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG16B)
+
+// Workaround for clang bug: http://llvm.org/bugs/show_bug.cgi?id=19149
+// Clang 3.4 does not implement 128-bit __atomic* intrinsics even though it defines __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16
+template< bool Signed >
+struct operations< 16u, Signed > :
+ public cas_based_operations< gcc_dcas_x86_64< Signed > >
+{
+};
+
+#else
+
+template< bool Signed >
+struct operations< 16u, Signed > :
+ public gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >
+{
+};
+
+#endif
+#endif
+
+
+#if BOOST_ATOMIC_INT64_LOCK_FREE > 0
+#if defined(__clang__) && defined(BOOST_ATOMIC_DETAIL_X86_HAS_CMPXCHG8B)
+
+// Workaround for clang bug http://llvm.org/bugs/show_bug.cgi?id=19355
+template< bool Signed >
+struct operations< 8u, Signed > :
+ public cas_based_operations< gcc_dcas_x86< Signed > >
+{
+};
+
+#elif (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 8 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 8 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_INT == 8 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 8 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 8 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE)
+
+#define BOOST_ATOMIC_DETAIL_INT64_EXTENDED
+
+template< bool Signed >
+struct operations< 8u, Signed > :
+ public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 8u, Signed >
+{
+};
+
+#else
+
+template< bool Signed >
+struct operations< 8u, Signed > :
+ public gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >
+{
+};
+
+#endif
+#endif
+
+#if BOOST_ATOMIC_INT32_LOCK_FREE > 0
+#if (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 4 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 4 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_INT == 4 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 4 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 4 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE)
+
+#define BOOST_ATOMIC_DETAIL_INT32_EXTENDED
+
+#if !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)
+
+template< bool Signed >
+struct operations< 4u, Signed > :
+ public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >, 4u, Signed >
+{
+};
+
+#else // !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)
+
+template< bool Signed >
+struct operations< 4u, Signed > :
+ public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 4u, Signed >
+{
+};
+
+#endif // !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)
+
+#else
+
+template< bool Signed >
+struct operations< 4u, Signed > :
+ public gcc_atomic_operations< typename make_storage_type< 4u, Signed >::type >
+{
+};
+
+#endif
+#endif
+
+#if BOOST_ATOMIC_INT16_LOCK_FREE > 0
+#if (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 2 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 2 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_INT == 2 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 2 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 2 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE)
+
+#define BOOST_ATOMIC_DETAIL_INT16_EXTENDED
+
+#if !defined(BOOST_ATOMIC_DETAIL_INT32_EXTENDED)
+
+template< bool Signed >
+struct operations< 2u, Signed > :
+ public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 4u, Signed >::type >, 2u, Signed >
+{
+};
+
+#elif !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)
+
+template< bool Signed >
+struct operations< 2u, Signed > :
+ public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >, 2u, Signed >
+{
+};
+
+#else
+
+template< bool Signed >
+struct operations< 2u, Signed > :
+ public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 2u, Signed >
+{
+};
+
+#endif
+
+#else
+
+template< bool Signed >
+struct operations< 2u, Signed > :
+ public gcc_atomic_operations< typename make_storage_type< 2u, Signed >::type >
+{
+};
+
+#endif
+#endif
+
+#if BOOST_ATOMIC_INT8_LOCK_FREE > 0
+#if (BOOST_ATOMIC_DETAIL_SIZEOF_LLONG == 1 && __GCC_ATOMIC_LLONG_LOCK_FREE != BOOST_ATOMIC_LLONG_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_LONG == 1 && __GCC_ATOMIC_LONG_LOCK_FREE != BOOST_ATOMIC_LONG_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_INT == 1 && __GCC_ATOMIC_INT_LOCK_FREE != BOOST_ATOMIC_INT_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_SHORT == 1 && __GCC_ATOMIC_SHORT_LOCK_FREE != BOOST_ATOMIC_SHORT_LOCK_FREE) ||\
+ (BOOST_ATOMIC_DETAIL_SIZEOF_WCHAR_T == 1 && __GCC_ATOMIC_WCHAR_T_LOCK_FREE != BOOST_ATOMIC_WCHAR_T_LOCK_FREE) ||\
+ (__GCC_ATOMIC_CHAR_LOCK_FREE != BOOST_ATOMIC_CHAR_LOCK_FREE) ||\
+ (__GCC_ATOMIC_BOOL_LOCK_FREE != BOOST_ATOMIC_BOOL_LOCK_FREE)
+
+#if !defined(BOOST_ATOMIC_DETAIL_INT16_EXTENDED)
+
+template< bool Signed >
+struct operations< 1u, Signed > :
+ public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 2u, Signed >::type >, 1u, Signed >
+{
+};
+
+#elif !defined(BOOST_ATOMIC_DETAIL_INT32_EXTENDED)
+
+template< bool Signed >
+struct operations< 1u, Signed > :
+ public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 4u, Signed >::type >, 1u, Signed >
+{
+};
+
+#elif !defined(BOOST_ATOMIC_DETAIL_INT64_EXTENDED)
+
+template< bool Signed >
+struct operations< 1u, Signed > :
+ public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 8u, Signed >::type >, 1u, Signed >
+{
+};
+
+#else
+
+template< bool Signed >
+struct operations< 1u, Signed > :
+ public extending_cas_based_operations< gcc_atomic_operations< typename make_storage_type< 16u, Signed >::type >, 1u, Signed >
+{
+};
+
+#endif
+
+#else
+
+template< bool Signed >
+struct operations< 1u, Signed > :
+ public gcc_atomic_operations< typename make_storage_type< 1u, Signed >::type >
+{
+};
+
+#endif
+#endif
+
+#undef BOOST_ATOMIC_DETAIL_INT16_EXTENDED
+#undef BOOST_ATOMIC_DETAIL_INT32_EXTENDED
+#undef BOOST_ATOMIC_DETAIL_INT64_EXTENDED
+
+BOOST_FORCEINLINE void thread_fence(memory_order order) BOOST_NOEXCEPT
+{
+ __atomic_thread_fence(atomics::detail::convert_memory_order_to_gcc(order));
+}
+
+BOOST_FORCEINLINE void signal_fence(memory_order order) BOOST_NOEXCEPT
+{
+ __atomic_signal_fence(atomics::detail::convert_memory_order_to_gcc(order));
+}
+
+} // namespace detail
+} // namespace atomics
+} // namespace boost
+
+#endif // BOOST_ATOMIC_DETAIL_OPS_GCC_ATOMIC_HPP_INCLUDED_