-//$$CDS-header$$
+/*
+ This file is a part of libcds - Concurrent Data Structures library
+
+ (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
+
+ Source code repo: http://github.com/khizmax/libcds/
+ Download: http://sourceforge.net/projects/libcds/files/
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+
+ * 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.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 CDSLIB_DETAILS_MARKED_PTR_H
#define CDSLIB_DETAILS_MARKED_PTR_H
template <typename T, int Bitmask>
class marked_ptr
{
- T * m_ptr ; ///< pointer and its mark bits
+ T * m_ptr ; ///< pointer and its mark bits
public:
typedef T value_type ; ///< type of value the class points to
private:
//@cond
+ union pointer_cast {
+ T * ptr;
+ uintptr_t n;
+
+ pointer_cast(T * p) : ptr(p) {}
+ pointer_cast(uintptr_t i) : n(i) {}
+ };
static uintptr_t to_int( value_type * p ) CDS_NOEXCEPT
{
- return reinterpret_cast<uintptr_t>( p );
+ return pointer_cast(p).n;
}
static value_type * to_ptr( uintptr_t n ) CDS_NOEXCEPT
{
- return reinterpret_cast< value_type *>( n );
+ return pointer_cast(n).ptr;
}
uintptr_t to_int() const CDS_NOEXCEPT
marked_ptr& operator &=( int nBits ) CDS_NOEXCEPT
{
assert( (nBits & pointer_bitmask) == 0 );
- m_ptr = to_ptr( to_int() & (pointer_bitmask | nBits) );
+ m_ptr = to_ptr( to_int() & (pointer_bitmask | nBits));
return *this;
}
{}
CDS_CONSTEXPR explicit atomic(marked_ptr val) CDS_NOEXCEPT
- : m_atomic( val.all() )
+ : m_atomic( val.all())
{}
CDS_CONSTEXPR explicit atomic(T * p) CDS_NOEXCEPT
: m_atomic( p )
atomic(const atomic&) = delete;
atomic& operator=(const atomic&) = delete;
-#if !(CDS_COMPILER == CDS_COMPILER_MSVC && CDS_COMPILER_VERSION <= CDS_COMPILER_MSVC12)
- // MSVC12: warning C4522: multiple assignment operators specified
+#if !(CDS_COMPILER == CDS_COMPILER_MSVC && CDS_COMPILER_VERSION <= CDS_COMPILER_MSVC14_1)
+ // MSVC12, MSVC14, MSVC14.1: warning C4522: multiple assignment operators specified
atomic& operator=(const atomic&) volatile = delete;
marked_ptr operator=(marked_ptr val) volatile CDS_NOEXCEPT
{