diff options
Diffstat (limited to 'contrib/src/boost/smart_ptr/detail/spinlock_gcc_arm.hpp')
-rw-r--r-- | contrib/src/boost/smart_ptr/detail/spinlock_gcc_arm.hpp | 242 |
1 files changed, 121 insertions, 121 deletions
diff --git a/contrib/src/boost/smart_ptr/detail/spinlock_gcc_arm.hpp b/contrib/src/boost/smart_ptr/detail/spinlock_gcc_arm.hpp index 24d08a8..cd68af5 100644 --- a/contrib/src/boost/smart_ptr/detail/spinlock_gcc_arm.hpp +++ b/contrib/src/boost/smart_ptr/detail/spinlock_gcc_arm.hpp @@ -1,121 +1,121 @@ -#ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ARM_HPP_INCLUDED -#define BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ARM_HPP_INCLUDED - -// -// Copyright (c) 2008, 2011 Peter Dimov -// -// 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) -// - -#include <boost/smart_ptr/detail/yield_k.hpp> - -#if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_7S__) - -# define BOOST_SP_ARM_BARRIER "dmb" -# define BOOST_SP_ARM_HAS_LDREX - -#elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) - -# define BOOST_SP_ARM_BARRIER "mcr p15, 0, r0, c7, c10, 5" -# define BOOST_SP_ARM_HAS_LDREX - -#else - -# define BOOST_SP_ARM_BARRIER "" - -#endif - -namespace boost -{ - -namespace detail -{ - -class spinlock -{ -public: - - int v_; - -public: - - bool try_lock() - { - int r; - -#ifdef BOOST_SP_ARM_HAS_LDREX - - __asm__ __volatile__( - "ldrex %0, [%2]; \n" - "cmp %0, %1; \n" - "strexne %0, %1, [%2]; \n" - BOOST_SP_ARM_BARRIER : - "=&r"( r ): // outputs - "r"( 1 ), "r"( &v_ ): // inputs - "memory", "cc" ); - -#else - - __asm__ __volatile__( - "swp %0, %1, [%2];\n" - BOOST_SP_ARM_BARRIER : - "=&r"( r ): // outputs - "r"( 1 ), "r"( &v_ ): // inputs - "memory", "cc" ); - -#endif - - return r == 0; - } - - void lock() - { - for( unsigned k = 0; !try_lock(); ++k ) - { - boost::detail::yield( k ); - } - } - - void unlock() - { - __asm__ __volatile__( BOOST_SP_ARM_BARRIER ::: "memory" ); - *const_cast< int volatile* >( &v_ ) = 0; - __asm__ __volatile__( BOOST_SP_ARM_BARRIER ::: "memory" ); - } - -public: - - class scoped_lock - { - private: - - spinlock & sp_; - - scoped_lock( scoped_lock const & ); - scoped_lock & operator=( scoped_lock const & ); - - public: - - explicit scoped_lock( spinlock & sp ): sp_( sp ) - { - sp.lock(); - } - - ~scoped_lock() - { - sp_.unlock(); - } - }; -}; - -} // namespace detail -} // namespace boost - -#define BOOST_DETAIL_SPINLOCK_INIT {0} - -#undef BOOST_SP_ARM_BARRIER -#undef BOOST_SP_ARM_HAS_LDREX - -#endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ARM_HPP_INCLUDED +#ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ARM_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ARM_HPP_INCLUDED
+
+//
+// Copyright (c) 2008, 2011 Peter Dimov
+//
+// 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)
+//
+
+#include <boost/smart_ptr/detail/yield_k.hpp>
+
+#if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_7S__)
+
+# define BOOST_SP_ARM_BARRIER "dmb"
+# define BOOST_SP_ARM_HAS_LDREX
+
+#elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__)
+
+# define BOOST_SP_ARM_BARRIER "mcr p15, 0, r0, c7, c10, 5"
+# define BOOST_SP_ARM_HAS_LDREX
+
+#else
+
+# define BOOST_SP_ARM_BARRIER ""
+
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+class spinlock
+{
+public:
+
+ int v_;
+
+public:
+
+ bool try_lock()
+ {
+ int r;
+
+#ifdef BOOST_SP_ARM_HAS_LDREX
+
+ __asm__ __volatile__(
+ "ldrex %0, [%2]; \n"
+ "cmp %0, %1; \n"
+ "strexne %0, %1, [%2]; \n"
+ BOOST_SP_ARM_BARRIER :
+ "=&r"( r ): // outputs
+ "r"( 1 ), "r"( &v_ ): // inputs
+ "memory", "cc" );
+
+#else
+
+ __asm__ __volatile__(
+ "swp %0, %1, [%2];\n"
+ BOOST_SP_ARM_BARRIER :
+ "=&r"( r ): // outputs
+ "r"( 1 ), "r"( &v_ ): // inputs
+ "memory", "cc" );
+
+#endif
+
+ return r == 0;
+ }
+
+ void lock()
+ {
+ for( unsigned k = 0; !try_lock(); ++k )
+ {
+ boost::detail::yield( k );
+ }
+ }
+
+ void unlock()
+ {
+ __asm__ __volatile__( BOOST_SP_ARM_BARRIER ::: "memory" );
+ *const_cast< int volatile* >( &v_ ) = 0;
+ __asm__ __volatile__( BOOST_SP_ARM_BARRIER ::: "memory" );
+ }
+
+public:
+
+ class scoped_lock
+ {
+ private:
+
+ spinlock & sp_;
+
+ scoped_lock( scoped_lock const & );
+ scoped_lock & operator=( scoped_lock const & );
+
+ public:
+
+ explicit scoped_lock( spinlock & sp ): sp_( sp )
+ {
+ sp.lock();
+ }
+
+ ~scoped_lock()
+ {
+ sp_.unlock();
+ }
+ };
+};
+
+} // namespace detail
+} // namespace boost
+
+#define BOOST_DETAIL_SPINLOCK_INIT {0}
+
+#undef BOOST_SP_ARM_BARRIER
+#undef BOOST_SP_ARM_HAS_LDREX
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ARM_HPP_INCLUDED
|