688 lines
24 KiB
C++
688 lines
24 KiB
C++
|
//
|
||
|
|
// impl/write_at.hpp
|
||
|
|
// ~~~~~~~~~~~~~~~~~
|
||
|
|
//
|
||
|
|
// Copyright (c) 2003-2023 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_IMPL_WRITE_AT_HPP
|
||
|
|
#define ASIO_IMPL_WRITE_AT_HPP
|
||
|
|
|
||
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
|
||
|
|
# pragma once
|
||
|
|
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
|
||
|
|
|
||
|
|
#include "asio/associator.hpp"
|
||
|
|
#include "asio/buffer.hpp"
|
||
|
|
#include "asio/detail/array_fwd.hpp"
|
||
|
|
#include "asio/detail/base_from_cancellation_state.hpp"
|
||
|
|
#include "asio/detail/base_from_completion_cond.hpp"
|
||
|
|
#include "asio/detail/bind_handler.hpp"
|
||
|
|
#include "asio/detail/consuming_buffers.hpp"
|
||
|
|
#include "asio/detail/dependent_type.hpp"
|
||
|
|
#include "asio/detail/handler_alloc_helpers.hpp"
|
||
|
|
#include "asio/detail/handler_cont_helpers.hpp"
|
||
|
|
#include "asio/detail/handler_invoke_helpers.hpp"
|
||
|
|
#include "asio/detail/handler_tracking.hpp"
|
||
|
|
#include "asio/detail/handler_type_requirements.hpp"
|
||
|
|
#include "asio/detail/non_const_lvalue.hpp"
|
||
|
|
#include "asio/detail/throw_error.hpp"
|
||
|
|
|
||
|
|
#include "asio/detail/push_options.hpp"
|
||
|
|
|
||
|
|
namespace asio {
|
||
|
|
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
template <typename SyncRandomAccessWriteDevice, typename ConstBufferSequence,
|
||
|
|
typename ConstBufferIterator, typename CompletionCondition>
|
||
|
|
std::size_t write_at_buffer_sequence(SyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, const ConstBufferSequence& buffers,
|
||
|
|
const ConstBufferIterator&, CompletionCondition completion_condition,
|
||
|
|
asio::error_code& ec)
|
||
|
|
{
|
||
|
|
ec = asio::error_code();
|
||
|
|
asio::detail::consuming_buffers<const_buffer,
|
||
|
|
ConstBufferSequence, ConstBufferIterator> tmp(buffers);
|
||
|
|
while (!tmp.empty())
|
||
|
|
{
|
||
|
|
if (std::size_t max_size = detail::adapt_completion_condition_result(
|
||
|
|
completion_condition(ec, tmp.total_consumed())))
|
||
|
|
{
|
||
|
|
tmp.consume(d.write_some_at(offset + tmp.total_consumed(),
|
||
|
|
tmp.prepare(max_size), ec));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return tmp.total_consumed();
|
||
|
|
}
|
||
|
|
} // namespace detail
|
||
|
|
|
||
|
|
template <typename SyncRandomAccessWriteDevice, typename ConstBufferSequence,
|
||
|
|
typename CompletionCondition>
|
||
|
|
std::size_t write_at(SyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, const ConstBufferSequence& buffers,
|
||
|
|
CompletionCondition completion_condition, asio::error_code& ec)
|
||
|
|
{
|
||
|
|
return detail::write_at_buffer_sequence(d, offset, buffers,
|
||
|
|
asio::buffer_sequence_begin(buffers),
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition), ec);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename SyncRandomAccessWriteDevice, typename ConstBufferSequence>
|
||
|
|
inline std::size_t write_at(SyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, const ConstBufferSequence& buffers)
|
||
|
|
{
|
||
|
|
asio::error_code ec;
|
||
|
|
std::size_t bytes_transferred = write_at(
|
||
|
|
d, offset, buffers, transfer_all(), ec);
|
||
|
|
asio::detail::throw_error(ec, "write_at");
|
||
|
|
return bytes_transferred;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename SyncRandomAccessWriteDevice, typename ConstBufferSequence>
|
||
|
|
inline std::size_t write_at(SyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, const ConstBufferSequence& buffers,
|
||
|
|
asio::error_code& ec)
|
||
|
|
{
|
||
|
|
return write_at(d, offset, buffers, transfer_all(), ec);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename SyncRandomAccessWriteDevice, typename ConstBufferSequence,
|
||
|
|
typename CompletionCondition>
|
||
|
|
inline std::size_t write_at(SyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, const ConstBufferSequence& buffers,
|
||
|
|
CompletionCondition completion_condition)
|
||
|
|
{
|
||
|
|
asio::error_code ec;
|
||
|
|
std::size_t bytes_transferred = write_at(d, offset, buffers,
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition), ec);
|
||
|
|
asio::detail::throw_error(ec, "write_at");
|
||
|
|
return bytes_transferred;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(ASIO_NO_EXTENSIONS)
|
||
|
|
#if !defined(ASIO_NO_IOSTREAM)
|
||
|
|
|
||
|
|
template <typename SyncRandomAccessWriteDevice, typename Allocator,
|
||
|
|
typename CompletionCondition>
|
||
|
|
std::size_t write_at(SyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, asio::basic_streambuf<Allocator>& b,
|
||
|
|
CompletionCondition completion_condition, asio::error_code& ec)
|
||
|
|
{
|
||
|
|
std::size_t bytes_transferred = write_at(d, offset, b.data(),
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition), ec);
|
||
|
|
b.consume(bytes_transferred);
|
||
|
|
return bytes_transferred;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename SyncRandomAccessWriteDevice, typename Allocator>
|
||
|
|
inline std::size_t write_at(SyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, asio::basic_streambuf<Allocator>& b)
|
||
|
|
{
|
||
|
|
asio::error_code ec;
|
||
|
|
std::size_t bytes_transferred = write_at(d, offset, b, transfer_all(), ec);
|
||
|
|
asio::detail::throw_error(ec, "write_at");
|
||
|
|
return bytes_transferred;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename SyncRandomAccessWriteDevice, typename Allocator>
|
||
|
|
inline std::size_t write_at(SyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, asio::basic_streambuf<Allocator>& b,
|
||
|
|
asio::error_code& ec)
|
||
|
|
{
|
||
|
|
return write_at(d, offset, b, transfer_all(), ec);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename SyncRandomAccessWriteDevice, typename Allocator,
|
||
|
|
typename CompletionCondition>
|
||
|
|
inline std::size_t write_at(SyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, asio::basic_streambuf<Allocator>& b,
|
||
|
|
CompletionCondition completion_condition)
|
||
|
|
{
|
||
|
|
asio::error_code ec;
|
||
|
|
std::size_t bytes_transferred = write_at(d, offset, b,
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition), ec);
|
||
|
|
asio::detail::throw_error(ec, "write_at");
|
||
|
|
return bytes_transferred;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // !defined(ASIO_NO_IOSTREAM)
|
||
|
|
#endif // !defined(ASIO_NO_EXTENSIONS)
|
||
|
|
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
template <typename AsyncRandomAccessWriteDevice,
|
||
|
|
typename ConstBufferSequence, typename ConstBufferIterator,
|
||
|
|
typename CompletionCondition, typename WriteHandler>
|
||
|
|
class write_at_op
|
||
|
|
: public base_from_cancellation_state<WriteHandler>,
|
||
|
|
base_from_completion_cond<CompletionCondition>
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
write_at_op(AsyncRandomAccessWriteDevice& device,
|
||
|
|
uint64_t offset, const ConstBufferSequence& buffers,
|
||
|
|
CompletionCondition& completion_condition, WriteHandler& handler)
|
||
|
|
: base_from_cancellation_state<WriteHandler>(
|
||
|
|
handler, enable_partial_cancellation()),
|
||
|
|
base_from_completion_cond<CompletionCondition>(completion_condition),
|
||
|
|
device_(device),
|
||
|
|
offset_(offset),
|
||
|
|
buffers_(buffers),
|
||
|
|
start_(0),
|
||
|
|
handler_(ASIO_MOVE_CAST(WriteHandler)(handler))
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(ASIO_HAS_MOVE)
|
||
|
|
write_at_op(const write_at_op& other)
|
||
|
|
: base_from_cancellation_state<WriteHandler>(other),
|
||
|
|
base_from_completion_cond<CompletionCondition>(other),
|
||
|
|
device_(other.device_),
|
||
|
|
offset_(other.offset_),
|
||
|
|
buffers_(other.buffers_),
|
||
|
|
start_(other.start_),
|
||
|
|
handler_(other.handler_)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
write_at_op(write_at_op&& other)
|
||
|
|
: base_from_cancellation_state<WriteHandler>(
|
||
|
|
ASIO_MOVE_CAST(base_from_cancellation_state<
|
||
|
|
WriteHandler>)(other)),
|
||
|
|
base_from_completion_cond<CompletionCondition>(
|
||
|
|
ASIO_MOVE_CAST(base_from_completion_cond<
|
||
|
|
CompletionCondition>)(other)),
|
||
|
|
device_(other.device_),
|
||
|
|
offset_(other.offset_),
|
||
|
|
buffers_(ASIO_MOVE_CAST(buffers_type)(other.buffers_)),
|
||
|
|
start_(other.start_),
|
||
|
|
handler_(ASIO_MOVE_CAST(WriteHandler)(other.handler_))
|
||
|
|
{
|
||
|
|
}
|
||
|
|
#endif // defined(ASIO_HAS_MOVE)
|
||
|
|
|
||
|
|
void operator()(asio::error_code ec,
|
||
|
|
std::size_t bytes_transferred, int start = 0)
|
||
|
|
{
|
||
|
|
std::size_t max_size;
|
||
|
|
switch (start_ = start)
|
||
|
|
{
|
||
|
|
case 1:
|
||
|
|
max_size = this->check_for_completion(ec, buffers_.total_consumed());
|
||
|
|
for (;;)
|
||
|
|
{
|
||
|
|
{
|
||
|
|
ASIO_HANDLER_LOCATION((__FILE__, __LINE__, "async_write_at"));
|
||
|
|
device_.async_write_some_at(
|
||
|
|
offset_ + buffers_.total_consumed(), buffers_.prepare(max_size),
|
||
|
|
ASIO_MOVE_CAST(write_at_op)(*this));
|
||
|
|
}
|
||
|
|
return; default:
|
||
|
|
buffers_.consume(bytes_transferred);
|
||
|
|
if ((!ec && bytes_transferred == 0) || buffers_.empty())
|
||
|
|
break;
|
||
|
|
max_size = this->check_for_completion(ec, buffers_.total_consumed());
|
||
|
|
if (max_size == 0)
|
||
|
|
break;
|
||
|
|
if (this->cancelled() != cancellation_type::none)
|
||
|
|
{
|
||
|
|
ec = asio::error::operation_aborted;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ASIO_MOVE_OR_LVALUE(WriteHandler)(handler_)(
|
||
|
|
static_cast<const asio::error_code&>(ec),
|
||
|
|
static_cast<const std::size_t&>(buffers_.total_consumed()));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//private:
|
||
|
|
typedef asio::detail::consuming_buffers<const_buffer,
|
||
|
|
ConstBufferSequence, ConstBufferIterator> buffers_type;
|
||
|
|
|
||
|
|
AsyncRandomAccessWriteDevice& device_;
|
||
|
|
uint64_t offset_;
|
||
|
|
buffers_type buffers_;
|
||
|
|
int start_;
|
||
|
|
WriteHandler handler_;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename AsyncRandomAccessWriteDevice,
|
||
|
|
typename ConstBufferSequence, typename ConstBufferIterator,
|
||
|
|
typename CompletionCondition, typename WriteHandler>
|
||
|
|
inline asio_handler_allocate_is_deprecated
|
||
|
|
asio_handler_allocate(std::size_t size,
|
||
|
|
write_at_op<AsyncRandomAccessWriteDevice, ConstBufferSequence,
|
||
|
|
ConstBufferIterator, CompletionCondition, WriteHandler>* this_handler)
|
||
|
|
{
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
asio_handler_alloc_helpers::allocate(size, this_handler->handler_);
|
||
|
|
return asio_handler_allocate_is_no_longer_used();
|
||
|
|
#else // defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_alloc_helpers::allocate(
|
||
|
|
size, this_handler->handler_);
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncRandomAccessWriteDevice,
|
||
|
|
typename ConstBufferSequence, typename ConstBufferIterator,
|
||
|
|
typename CompletionCondition, typename WriteHandler>
|
||
|
|
inline asio_handler_deallocate_is_deprecated
|
||
|
|
asio_handler_deallocate(void* pointer, std::size_t size,
|
||
|
|
write_at_op<AsyncRandomAccessWriteDevice, ConstBufferSequence,
|
||
|
|
ConstBufferIterator, CompletionCondition, WriteHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_alloc_helpers::deallocate(
|
||
|
|
pointer, size, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_deallocate_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncRandomAccessWriteDevice,
|
||
|
|
typename ConstBufferSequence, typename ConstBufferIterator,
|
||
|
|
typename CompletionCondition, typename WriteHandler>
|
||
|
|
inline bool asio_handler_is_continuation(
|
||
|
|
write_at_op<AsyncRandomAccessWriteDevice, ConstBufferSequence,
|
||
|
|
ConstBufferIterator, CompletionCondition, WriteHandler>* this_handler)
|
||
|
|
{
|
||
|
|
return this_handler->start_ == 0 ? true
|
||
|
|
: asio_handler_cont_helpers::is_continuation(
|
||
|
|
this_handler->handler_);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Function, typename AsyncRandomAccessWriteDevice,
|
||
|
|
typename ConstBufferSequence, typename ConstBufferIterator,
|
||
|
|
typename CompletionCondition, typename WriteHandler>
|
||
|
|
inline asio_handler_invoke_is_deprecated
|
||
|
|
asio_handler_invoke(Function& function,
|
||
|
|
write_at_op<AsyncRandomAccessWriteDevice, ConstBufferSequence,
|
||
|
|
ConstBufferIterator, CompletionCondition, WriteHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_invoke_helpers::invoke(
|
||
|
|
function, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_invoke_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Function, typename AsyncRandomAccessWriteDevice,
|
||
|
|
typename ConstBufferSequence, typename ConstBufferIterator,
|
||
|
|
typename CompletionCondition, typename WriteHandler>
|
||
|
|
inline asio_handler_invoke_is_deprecated
|
||
|
|
asio_handler_invoke(const Function& function,
|
||
|
|
write_at_op<AsyncRandomAccessWriteDevice, ConstBufferSequence,
|
||
|
|
ConstBufferIterator, CompletionCondition, WriteHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_invoke_helpers::invoke(
|
||
|
|
function, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_invoke_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncRandomAccessWriteDevice,
|
||
|
|
typename ConstBufferSequence, typename ConstBufferIterator,
|
||
|
|
typename CompletionCondition, typename WriteHandler>
|
||
|
|
inline void start_write_at_op(AsyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, const ConstBufferSequence& buffers,
|
||
|
|
const ConstBufferIterator&, CompletionCondition& completion_condition,
|
||
|
|
WriteHandler& handler)
|
||
|
|
{
|
||
|
|
detail::write_at_op<AsyncRandomAccessWriteDevice, ConstBufferSequence,
|
||
|
|
ConstBufferIterator, CompletionCondition, WriteHandler>(
|
||
|
|
d, offset, buffers, completion_condition, handler)(
|
||
|
|
asio::error_code(), 0, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncRandomAccessWriteDevice>
|
||
|
|
class initiate_async_write_at
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
typedef typename AsyncRandomAccessWriteDevice::executor_type executor_type;
|
||
|
|
|
||
|
|
explicit initiate_async_write_at(AsyncRandomAccessWriteDevice& device)
|
||
|
|
: device_(device)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
executor_type get_executor() const ASIO_NOEXCEPT
|
||
|
|
{
|
||
|
|
return device_.get_executor();
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename WriteHandler, typename ConstBufferSequence,
|
||
|
|
typename CompletionCondition>
|
||
|
|
void operator()(ASIO_MOVE_ARG(WriteHandler) handler,
|
||
|
|
uint64_t offset, const ConstBufferSequence& buffers,
|
||
|
|
ASIO_MOVE_ARG(CompletionCondition) completion_cond) const
|
||
|
|
{
|
||
|
|
// If you get an error on the following line it means that your handler
|
||
|
|
// does not meet the documented type requirements for a WriteHandler.
|
||
|
|
ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check;
|
||
|
|
|
||
|
|
non_const_lvalue<WriteHandler> handler2(handler);
|
||
|
|
non_const_lvalue<CompletionCondition> completion_cond2(completion_cond);
|
||
|
|
start_write_at_op(device_, offset, buffers,
|
||
|
|
asio::buffer_sequence_begin(buffers),
|
||
|
|
completion_cond2.value, handler2.value);
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
AsyncRandomAccessWriteDevice& device_;
|
||
|
|
};
|
||
|
|
} // namespace detail
|
||
|
|
|
||
|
|
#if !defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
template <template <typename, typename> class Associator,
|
||
|
|
typename AsyncRandomAccessWriteDevice, typename ConstBufferSequence,
|
||
|
|
typename ConstBufferIterator, typename CompletionCondition,
|
||
|
|
typename WriteHandler, typename DefaultCandidate>
|
||
|
|
struct associator<Associator,
|
||
|
|
detail::write_at_op<AsyncRandomAccessWriteDevice, ConstBufferSequence,
|
||
|
|
ConstBufferIterator, CompletionCondition, WriteHandler>,
|
||
|
|
DefaultCandidate>
|
||
|
|
: Associator<WriteHandler, DefaultCandidate>
|
||
|
|
{
|
||
|
|
static typename Associator<WriteHandler, DefaultCandidate>::type
|
||
|
|
get(const detail::write_at_op<AsyncRandomAccessWriteDevice,
|
||
|
|
ConstBufferSequence, ConstBufferIterator,
|
||
|
|
CompletionCondition, WriteHandler>& h) ASIO_NOEXCEPT
|
||
|
|
{
|
||
|
|
return Associator<WriteHandler, DefaultCandidate>::get(h.handler_);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ASIO_AUTO_RETURN_TYPE_PREFIX2(
|
||
|
|
typename Associator<WriteHandler, DefaultCandidate>::type)
|
||
|
|
get(const detail::write_at_op<AsyncRandomAccessWriteDevice,
|
||
|
|
ConstBufferSequence, ConstBufferIterator,
|
||
|
|
CompletionCondition, WriteHandler>& h,
|
||
|
|
const DefaultCandidate& c) ASIO_NOEXCEPT
|
||
|
|
ASIO_AUTO_RETURN_TYPE_SUFFIX((
|
||
|
|
Associator<WriteHandler, DefaultCandidate>::get(h.handler_, c)))
|
||
|
|
{
|
||
|
|
return Associator<WriteHandler, DefaultCandidate>::get(h.handler_, c);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // !defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
template <typename AsyncRandomAccessWriteDevice,
|
||
|
|
typename ConstBufferSequence, typename CompletionCondition,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) WriteToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(WriteToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_write_at(AsyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, const ConstBufferSequence& buffers,
|
||
|
|
CompletionCondition completion_condition,
|
||
|
|
ASIO_MOVE_ARG(WriteToken) token)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_initiate<WriteToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
declval<detail::initiate_async_write_at<
|
||
|
|
AsyncRandomAccessWriteDevice> >(),
|
||
|
|
token, offset, buffers,
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition))))
|
||
|
|
{
|
||
|
|
return async_initiate<WriteToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
detail::initiate_async_write_at<AsyncRandomAccessWriteDevice>(d),
|
||
|
|
token, offset, buffers,
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition));
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncRandomAccessWriteDevice, typename ConstBufferSequence,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) WriteToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(WriteToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_write_at(AsyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, const ConstBufferSequence& buffers,
|
||
|
|
ASIO_MOVE_ARG(WriteToken) token)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_initiate<WriteToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
declval<detail::initiate_async_write_at<
|
||
|
|
AsyncRandomAccessWriteDevice> >(),
|
||
|
|
token, offset, buffers, transfer_all())))
|
||
|
|
{
|
||
|
|
return async_initiate<WriteToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
detail::initiate_async_write_at<AsyncRandomAccessWriteDevice>(d),
|
||
|
|
token, offset, buffers, transfer_all());
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(ASIO_NO_EXTENSIONS)
|
||
|
|
#if !defined(ASIO_NO_IOSTREAM)
|
||
|
|
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
template <typename Allocator, typename WriteHandler>
|
||
|
|
class write_at_streambuf_op
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
write_at_streambuf_op(
|
||
|
|
asio::basic_streambuf<Allocator>& streambuf,
|
||
|
|
WriteHandler& handler)
|
||
|
|
: streambuf_(streambuf),
|
||
|
|
handler_(ASIO_MOVE_CAST(WriteHandler)(handler))
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(ASIO_HAS_MOVE)
|
||
|
|
write_at_streambuf_op(const write_at_streambuf_op& other)
|
||
|
|
: streambuf_(other.streambuf_),
|
||
|
|
handler_(other.handler_)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
write_at_streambuf_op(write_at_streambuf_op&& other)
|
||
|
|
: streambuf_(other.streambuf_),
|
||
|
|
handler_(ASIO_MOVE_CAST(WriteHandler)(other.handler_))
|
||
|
|
{
|
||
|
|
}
|
||
|
|
#endif // defined(ASIO_HAS_MOVE)
|
||
|
|
|
||
|
|
void operator()(const asio::error_code& ec,
|
||
|
|
const std::size_t bytes_transferred)
|
||
|
|
{
|
||
|
|
streambuf_.consume(bytes_transferred);
|
||
|
|
ASIO_MOVE_OR_LVALUE(WriteHandler)(handler_)(ec, bytes_transferred);
|
||
|
|
}
|
||
|
|
|
||
|
|
//private:
|
||
|
|
asio::basic_streambuf<Allocator>& streambuf_;
|
||
|
|
WriteHandler handler_;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Allocator, typename WriteHandler>
|
||
|
|
inline asio_handler_allocate_is_deprecated
|
||
|
|
asio_handler_allocate(std::size_t size,
|
||
|
|
write_at_streambuf_op<Allocator, WriteHandler>* this_handler)
|
||
|
|
{
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
asio_handler_alloc_helpers::allocate(size, this_handler->handler_);
|
||
|
|
return asio_handler_allocate_is_no_longer_used();
|
||
|
|
#else // defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_alloc_helpers::allocate(
|
||
|
|
size, this_handler->handler_);
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Allocator, typename WriteHandler>
|
||
|
|
inline asio_handler_deallocate_is_deprecated
|
||
|
|
asio_handler_deallocate(void* pointer, std::size_t size,
|
||
|
|
write_at_streambuf_op<Allocator, WriteHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_alloc_helpers::deallocate(
|
||
|
|
pointer, size, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_deallocate_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Allocator, typename WriteHandler>
|
||
|
|
inline bool asio_handler_is_continuation(
|
||
|
|
write_at_streambuf_op<Allocator, WriteHandler>* this_handler)
|
||
|
|
{
|
||
|
|
return asio_handler_cont_helpers::is_continuation(
|
||
|
|
this_handler->handler_);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Function, typename Allocator, typename WriteHandler>
|
||
|
|
inline asio_handler_invoke_is_deprecated
|
||
|
|
asio_handler_invoke(Function& function,
|
||
|
|
write_at_streambuf_op<Allocator, WriteHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_invoke_helpers::invoke(
|
||
|
|
function, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_invoke_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Function, typename Allocator, typename WriteHandler>
|
||
|
|
inline asio_handler_invoke_is_deprecated
|
||
|
|
asio_handler_invoke(const Function& function,
|
||
|
|
write_at_streambuf_op<Allocator, WriteHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_invoke_helpers::invoke(
|
||
|
|
function, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_invoke_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncRandomAccessWriteDevice>
|
||
|
|
class initiate_async_write_at_streambuf
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
typedef typename AsyncRandomAccessWriteDevice::executor_type executor_type;
|
||
|
|
|
||
|
|
explicit initiate_async_write_at_streambuf(
|
||
|
|
AsyncRandomAccessWriteDevice& device)
|
||
|
|
: device_(device)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
executor_type get_executor() const ASIO_NOEXCEPT
|
||
|
|
{
|
||
|
|
return device_.get_executor();
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename WriteHandler,
|
||
|
|
typename Allocator, typename CompletionCondition>
|
||
|
|
void operator()(ASIO_MOVE_ARG(WriteHandler) handler,
|
||
|
|
uint64_t offset, basic_streambuf<Allocator>* b,
|
||
|
|
ASIO_MOVE_ARG(CompletionCondition) completion_condition) const
|
||
|
|
{
|
||
|
|
// If you get an error on the following line it means that your handler
|
||
|
|
// does not meet the documented type requirements for a WriteHandler.
|
||
|
|
ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check;
|
||
|
|
|
||
|
|
non_const_lvalue<WriteHandler> handler2(handler);
|
||
|
|
async_write_at(device_, offset, b->data(),
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition),
|
||
|
|
write_at_streambuf_op<Allocator, typename decay<WriteHandler>::type>(
|
||
|
|
*b, handler2.value));
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
AsyncRandomAccessWriteDevice& device_;
|
||
|
|
};
|
||
|
|
} // namespace detail
|
||
|
|
|
||
|
|
#if !defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
template <template <typename, typename> class Associator,
|
||
|
|
typename Executor, typename WriteHandler, typename DefaultCandidate>
|
||
|
|
struct associator<Associator,
|
||
|
|
detail::write_at_streambuf_op<Executor, WriteHandler>,
|
||
|
|
DefaultCandidate>
|
||
|
|
: Associator<WriteHandler, DefaultCandidate>
|
||
|
|
{
|
||
|
|
static typename Associator<WriteHandler, DefaultCandidate>::type
|
||
|
|
get(const detail::write_at_streambuf_op<Executor, WriteHandler>& h)
|
||
|
|
ASIO_NOEXCEPT
|
||
|
|
{
|
||
|
|
return Associator<WriteHandler, DefaultCandidate>::get(h.handler_);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ASIO_AUTO_RETURN_TYPE_PREFIX2(
|
||
|
|
typename Associator<WriteHandler, DefaultCandidate>::type)
|
||
|
|
get(const detail::write_at_streambuf_op<Executor, WriteHandler>& h,
|
||
|
|
const DefaultCandidate& c) ASIO_NOEXCEPT
|
||
|
|
ASIO_AUTO_RETURN_TYPE_SUFFIX((
|
||
|
|
Associator<WriteHandler, DefaultCandidate>::get(h.handler_, c)))
|
||
|
|
{
|
||
|
|
return Associator<WriteHandler, DefaultCandidate>::get(h.handler_, c);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // !defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
template <typename AsyncRandomAccessWriteDevice,
|
||
|
|
typename Allocator, typename CompletionCondition,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) WriteToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(WriteToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_write_at(AsyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, asio::basic_streambuf<Allocator>& b,
|
||
|
|
CompletionCondition completion_condition,
|
||
|
|
ASIO_MOVE_ARG(WriteToken) token)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_initiate<WriteToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
declval<detail::initiate_async_write_at_streambuf<
|
||
|
|
AsyncRandomAccessWriteDevice> >(),
|
||
|
|
token, offset, &b,
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition))))
|
||
|
|
{
|
||
|
|
return async_initiate<WriteToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
detail::initiate_async_write_at_streambuf<
|
||
|
|
AsyncRandomAccessWriteDevice>(d),
|
||
|
|
token, offset, &b,
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition));
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncRandomAccessWriteDevice, typename Allocator,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) WriteToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(WriteToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_write_at(AsyncRandomAccessWriteDevice& d,
|
||
|
|
uint64_t offset, asio::basic_streambuf<Allocator>& b,
|
||
|
|
ASIO_MOVE_ARG(WriteToken) token)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_initiate<WriteToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
declval<detail::initiate_async_write_at_streambuf<
|
||
|
|
AsyncRandomAccessWriteDevice> >(),
|
||
|
|
token, offset, &b, transfer_all())))
|
||
|
|
{
|
||
|
|
return async_initiate<WriteToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
detail::initiate_async_write_at_streambuf<
|
||
|
|
AsyncRandomAccessWriteDevice>(d),
|
||
|
|
token, offset, &b, transfer_all());
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // !defined(ASIO_NO_IOSTREAM)
|
||
|
|
#endif // !defined(ASIO_NO_EXTENSIONS)
|
||
|
|
|
||
|
|
} // namespace asio
|
||
|
|
|
||
|
|
#include "asio/detail/pop_options.hpp"
|
||
|
|
|
||
|
|
#endif // ASIO_IMPL_WRITE_AT_HPP
|