/usr/include/asio/detail/handler_alloc_helpers.hpp is in libasio-dev 1.4.1-3ubuntu2.
This file is owned by root:root, with mode 0o644.
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// handler_alloc_helpers.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2008 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 ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
#define ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/push_options.hpp"
#include "asio/detail/push_options.hpp"
#include <boost/detail/workaround.hpp>
#include "asio/detail/pop_options.hpp"
#include "asio/handler_alloc_hook.hpp"
#include "asio/detail/noncopyable.hpp"
// Calls to asio_handler_allocate and asio_handler_deallocate must be made from
// a namespace that does not contain any overloads of these functions. The
// asio_handler_alloc_helpers namespace is defined here for that purpose.
namespace asio_handler_alloc_helpers {
template <typename Handler>
inline void* allocate(std::size_t s, Handler* h)
{
#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
return ::operator new(s);
#else
using namespace asio;
return asio_handler_allocate(s, h);
#endif
}
template <typename Handler>
inline void deallocate(void* p, std::size_t s, Handler* h)
{
#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
::operator delete(p);
#else
using namespace asio;
asio_handler_deallocate(p, s, h);
#endif
}
} // namespace asio_handler_alloc_helpers
namespace asio {
namespace detail {
// Traits for handler allocation.
template <typename Handler, typename Object>
struct handler_alloc_traits
{
typedef Handler handler_type;
typedef Object value_type;
typedef Object* pointer_type;
BOOST_STATIC_CONSTANT(std::size_t, value_size = sizeof(Object));
};
template <typename Alloc_Traits>
class handler_ptr;
// Helper class to provide RAII on uninitialised handler memory.
template <typename Alloc_Traits>
class raw_handler_ptr
: private noncopyable
{
public:
typedef typename Alloc_Traits::handler_type handler_type;
typedef typename Alloc_Traits::value_type value_type;
typedef typename Alloc_Traits::pointer_type pointer_type;
BOOST_STATIC_CONSTANT(std::size_t, value_size = Alloc_Traits::value_size);
// Constructor allocates the memory.
raw_handler_ptr(handler_type& handler)
: handler_(handler),
pointer_(static_cast<pointer_type>(
asio_handler_alloc_helpers::allocate(value_size, &handler_)))
{
}
// Destructor automatically deallocates memory, unless it has been stolen by
// a handler_ptr object.
~raw_handler_ptr()
{
if (pointer_)
asio_handler_alloc_helpers::deallocate(
pointer_, value_size, &handler_);
}
private:
friend class handler_ptr<Alloc_Traits>;
handler_type& handler_;
pointer_type pointer_;
};
// Helper class to provide RAII on uninitialised handler memory.
template <typename Alloc_Traits>
class handler_ptr
: private noncopyable
{
public:
typedef typename Alloc_Traits::handler_type handler_type;
typedef typename Alloc_Traits::value_type value_type;
typedef typename Alloc_Traits::pointer_type pointer_type;
BOOST_STATIC_CONSTANT(std::size_t, value_size = Alloc_Traits::value_size);
typedef raw_handler_ptr<Alloc_Traits> raw_ptr_type;
// Take ownership of existing memory.
handler_ptr(handler_type& handler, pointer_type pointer)
: handler_(handler),
pointer_(pointer)
{
}
// Construct object in raw memory and take ownership if construction succeeds.
handler_ptr(raw_ptr_type& raw_ptr)
: handler_(raw_ptr.handler_),
pointer_(new (raw_ptr.pointer_) value_type)
{
raw_ptr.pointer_ = 0;
}
// Construct object in raw memory and take ownership if construction succeeds.
template <typename Arg1>
handler_ptr(raw_ptr_type& raw_ptr, Arg1& a1)
: handler_(raw_ptr.handler_),
pointer_(new (raw_ptr.pointer_) value_type(a1))
{
raw_ptr.pointer_ = 0;
}
// Construct object in raw memory and take ownership if construction succeeds.
template <typename Arg1, typename Arg2>
handler_ptr(raw_ptr_type& raw_ptr, Arg1& a1, Arg2& a2)
: handler_(raw_ptr.handler_),
pointer_(new (raw_ptr.pointer_) value_type(a1, a2))
{
raw_ptr.pointer_ = 0;
}
// Construct object in raw memory and take ownership if construction succeeds.
template <typename Arg1, typename Arg2, typename Arg3>
handler_ptr(raw_ptr_type& raw_ptr, Arg1& a1, Arg2& a2, Arg3& a3)
: handler_(raw_ptr.handler_),
pointer_(new (raw_ptr.pointer_) value_type(a1, a2, a3))
{
raw_ptr.pointer_ = 0;
}
// Construct object in raw memory and take ownership if construction succeeds.
template <typename Arg1, typename Arg2, typename Arg3, typename Arg4>
handler_ptr(raw_ptr_type& raw_ptr, Arg1& a1, Arg2& a2, Arg3& a3, Arg4& a4)
: handler_(raw_ptr.handler_),
pointer_(new (raw_ptr.pointer_) value_type(a1, a2, a3, a4))
{
raw_ptr.pointer_ = 0;
}
// Construct object in raw memory and take ownership if construction succeeds.
template <typename Arg1, typename Arg2, typename Arg3, typename Arg4,
typename Arg5>
handler_ptr(raw_ptr_type& raw_ptr, Arg1& a1, Arg2& a2, Arg3& a3, Arg4& a4,
Arg5& a5)
: handler_(raw_ptr.handler_),
pointer_(new (raw_ptr.pointer_) value_type(a1, a2, a3, a4, a5))
{
raw_ptr.pointer_ = 0;
}
// Construct object in raw memory and take ownership if construction succeeds.
template <typename Arg1, typename Arg2, typename Arg3, typename Arg4,
typename Arg5, typename Arg6>
handler_ptr(raw_ptr_type& raw_ptr, Arg1& a1, Arg2& a2, Arg3& a3, Arg4& a4,
Arg5& a5, Arg6& a6)
: handler_(raw_ptr.handler_),
pointer_(new (raw_ptr.pointer_) value_type(a1, a2, a3, a4, a5, a6))
{
raw_ptr.pointer_ = 0;
}
// Construct object in raw memory and take ownership if construction succeeds.
template <typename Arg1, typename Arg2, typename Arg3, typename Arg4,
typename Arg5, typename Arg6, typename Arg7>
handler_ptr(raw_ptr_type& raw_ptr, Arg1& a1, Arg2& a2, Arg3& a3, Arg4& a4,
Arg5& a5, Arg6& a6, Arg7& a7)
: handler_(raw_ptr.handler_),
pointer_(new (raw_ptr.pointer_) value_type(a1, a2, a3, a4, a5, a6, a7))
{
raw_ptr.pointer_ = 0;
}
// Construct object in raw memory and take ownership if construction succeeds.
template <typename Arg1, typename Arg2, typename Arg3, typename Arg4,
typename Arg5, typename Arg6, typename Arg7, typename Arg8>
handler_ptr(raw_ptr_type& raw_ptr, Arg1& a1, Arg2& a2, Arg3& a3, Arg4& a4,
Arg5& a5, Arg6& a6, Arg7& a7, Arg8& a8)
: handler_(raw_ptr.handler_),
pointer_(new (raw_ptr.pointer_) value_type(
a1, a2, a3, a4, a5, a6, a7, a8))
{
raw_ptr.pointer_ = 0;
}
// Destructor automatically deallocates memory, unless it has been released.
~handler_ptr()
{
reset();
}
// Get the memory.
pointer_type get() const
{
return pointer_;
}
// Release ownership of the memory.
pointer_type release()
{
pointer_type tmp = pointer_;
pointer_ = 0;
return tmp;
}
// Explicitly destroy and deallocate the memory.
void reset()
{
if (pointer_)
{
pointer_->value_type::~value_type();
asio_handler_alloc_helpers::deallocate(
pointer_, value_size, &handler_);
pointer_ = 0;
}
}
private:
handler_type& handler_;
pointer_type pointer_;
};
} // namespace detail
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
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