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Fences for arm.

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[SVN r63571]
This commit is contained in:
Christopher Kohlhoff
2010-07-04 07:19:30 +00:00
parent 7ead504f73
commit c8146d544f
2 changed files with 88 additions and 2 deletions
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12
include/boost/asio/detail/fenced_block.hpp
View File

@@ -26,10 +26,14 @@
#elif defined(__GNUC__) \
&& ((__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)) \
&& !defined(__INTEL_COMPILER) && !defined(__ICL) \
&& !defined(__ICC) && !defined(__ECC) && !defined(__PATHSCALE__)
&& !defined(__ICC) && !defined(__ECC) && !defined(__PATHSCALE__) \
&& (!defined(__arm__) || (defined(__arm__) && \
(__GNUC__ == 4 && __GNUC_MINOR__ >= 4) || (__GNUC__ > 4)))
# include <boost/asio/detail/gcc_fenced_block.hpp>
#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
# include <boost/asio/detail/gcc_x86_fenced_block.hpp>
#elif defined(__GNUC__) && defined(__arm__)
# include <boost/asio/detail/gcc_arm_fenced_block.hpp>
#elif defined(BOOST_WINDOWS) && !defined(UNDER_CE)
# include <boost/asio/detail/win_fenced_block.hpp>
#else
@@ -49,10 +53,14 @@ typedef solaris_fenced_block fenced_block;
#elif defined(__GNUC__) \
&& ((__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)) \
&& !defined(__INTEL_COMPILER) && !defined(__ICL) \
&& !defined(__ICC) && !defined(__ECC) && !defined(__PATHSCALE__)
&& !defined(__ICC) && !defined(__ECC) && !defined(__PATHSCALE__) \
&& (!defined(__arm__) || (defined(__arm__) && \
(__GNUC__ == 4 && __GNUC_MINOR__ >= 4) || (__GNUC__ > 4)))
typedef gcc_fenced_block fenced_block;
#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
typedef gcc_x86_fenced_block fenced_block;
#elif defined(__GNUC__) && defined(__arm__)
typedef gcc_arm_fenced_block fenced_block;
#elif defined(BOOST_WINDOWS) && !defined(UNDER_CE)
typedef win_fenced_block fenced_block;
#else

78
include/boost/asio/detail/gcc_arm_fenced_block.hpp Normal file
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@@ -0,0 +1,78 @@
//
// detail/gcc_arm_fenced_block.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2010 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// 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)
//
#ifndef BOOST_ASIO_DETAIL_GCC_ARM_FENCED_BLOCK_HPP
#define BOOST_ASIO_DETAIL_GCC_ARM_FENCED_BLOCK_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#if defined(__GNUC__) && defined(__arm__)
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace detail {
class gcc_arm_fenced_block
: private noncopyable
{
public:
// Constructor.
gcc_arm_fenced_block()
{
barrier();
}
// Destructor.
~gcc_arm_fenced_block()
{
barrier();
}
private:
static void barrier()
{
#if defined(__ARM_ARCH_4__) \
|| defined(__ARM_ARCH_4T__) \
|| defined(__ARM_ARCH_5__) \
|| defined(__ARM_ARCH_5E__) \
|| defined(__ARM_ARCH_5T__) \
|| defined(__ARM_ARCH_5TE__) \
|| defined(__ARM_ARCH_5TEJ__) \
|| defined(__ARM_ARCH_6__) \
|| defined(__ARM_ARCH_6J__) \
|| defined(__ARM_ARCH_6K__) \
|| defined(__ARM_ARCH_6Z__) \
|| defined(__ARM_ARCH_6ZK__) \
|| defined(__ARM_ARCH_6T2__)
int a = 0, b = 0;
__asm__ __volatile__ ("swp %0, %1, [%2]"
: "=&r"(a) : "r"(1), "r"(&b) : "memory", "cc");
#else
// ARMv7 and later.
__asm__ __volatile__ ("dmb" : : : "memory");
#endif
}
};
} // namespace detail
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // defined(__GNUC__) && defined(__arm__)
#endif // BOOST_ASIO_DETAIL_GCC_ARM_FENCED_BLOCK_HPP