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author | Matthias P. Braendli <matthias.braendli@mpb.li> | 2019-10-07 04:52:50 +0200 |
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committer | Matthias P. Braendli <matthias.braendli@mpb.li> | 2019-10-07 04:52:50 +0200 |
commit | 0aa6201a490bfabc0ae021ceb9f1fb0f46727c5d (patch) | |
tree | a71d934d8151dd43e7c16555fef17fd749c5da70 /lib/asio/detail/impl/descriptor_ops.ipp | |
parent | 558d74bffd9f069955af52c0b308a1d6169bcff0 (diff) | |
parent | 0330221d51421caa110b8c5dcb567cc3d0620eb9 (diff) | |
download | dabmod-0aa6201a490bfabc0ae021ceb9f1fb0f46727c5d.tar.gz dabmod-0aa6201a490bfabc0ae021ceb9f1fb0f46727c5d.tar.bz2 dabmod-0aa6201a490bfabc0ae021ceb9f1fb0f46727c5d.zip |
Merge lime output into next branch
Diffstat (limited to 'lib/asio/detail/impl/descriptor_ops.ipp')
-rw-r--r-- | lib/asio/detail/impl/descriptor_ops.ipp | 474 |
1 files changed, 0 insertions, 474 deletions
diff --git a/lib/asio/detail/impl/descriptor_ops.ipp b/lib/asio/detail/impl/descriptor_ops.ipp deleted file mode 100644 index 1af643f..0000000 --- a/lib/asio/detail/impl/descriptor_ops.ipp +++ /dev/null @@ -1,474 +0,0 @@ -// -// detail/impl/descriptor_ops.ipp -// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -// -// Copyright (c) 2003-2018 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_IMPL_DESCRIPTOR_OPS_IPP -#define ASIO_DETAIL_IMPL_DESCRIPTOR_OPS_IPP - -#if defined(_MSC_VER) && (_MSC_VER >= 1200) -# pragma once -#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) - -#include "asio/detail/config.hpp" -#include <cerrno> -#include "asio/detail/descriptor_ops.hpp" -#include "asio/error.hpp" - -#if !defined(ASIO_WINDOWS) \ - && !defined(ASIO_WINDOWS_RUNTIME) \ - && !defined(__CYGWIN__) - -#include "asio/detail/push_options.hpp" - -namespace asio { -namespace detail { -namespace descriptor_ops { - -int open(const char* path, int flags, asio::error_code& ec) -{ - errno = 0; - int result = error_wrapper(::open(path, flags), ec); - if (result >= 0) - ec = asio::error_code(); - return result; -} - -int close(int d, state_type& state, asio::error_code& ec) -{ - int result = 0; - if (d != -1) - { - errno = 0; - result = error_wrapper(::close(d), ec); - - if (result != 0 - && (ec == asio::error::would_block - || ec == asio::error::try_again)) - { - // According to UNIX Network Programming Vol. 1, it is possible for - // close() to fail with EWOULDBLOCK under certain circumstances. What - // isn't clear is the state of the descriptor after this error. The one - // current OS where this behaviour is seen, Windows, says that the socket - // remains open. Therefore we'll put the descriptor back into blocking - // mode and have another attempt at closing it. -#if defined(__SYMBIAN32__) - int flags = ::fcntl(d, F_GETFL, 0); - if (flags >= 0) - ::fcntl(d, F_SETFL, flags & ~O_NONBLOCK); -#else // defined(__SYMBIAN32__) - ioctl_arg_type arg = 0; - ::ioctl(d, FIONBIO, &arg); -#endif // defined(__SYMBIAN32__) - state &= ~non_blocking; - - errno = 0; - result = error_wrapper(::close(d), ec); - } - } - - if (result == 0) - ec = asio::error_code(); - return result; -} - -bool set_user_non_blocking(int d, state_type& state, - bool value, asio::error_code& ec) -{ - if (d == -1) - { - ec = asio::error::bad_descriptor; - return false; - } - - errno = 0; -#if defined(__SYMBIAN32__) - int result = error_wrapper(::fcntl(d, F_GETFL, 0), ec); - if (result >= 0) - { - errno = 0; - int flag = (value ? (result | O_NONBLOCK) : (result & ~O_NONBLOCK)); - result = error_wrapper(::fcntl(d, F_SETFL, flag), ec); - } -#else // defined(__SYMBIAN32__) - ioctl_arg_type arg = (value ? 1 : 0); - int result = error_wrapper(::ioctl(d, FIONBIO, &arg), ec); -#endif // defined(__SYMBIAN32__) - - if (result >= 0) - { - ec = asio::error_code(); - if (value) - state |= user_set_non_blocking; - else - { - // Clearing the user-set non-blocking mode always overrides any - // internally-set non-blocking flag. Any subsequent asynchronous - // operations will need to re-enable non-blocking I/O. - state &= ~(user_set_non_blocking | internal_non_blocking); - } - return true; - } - - return false; -} - -bool set_internal_non_blocking(int d, state_type& state, - bool value, asio::error_code& ec) -{ - if (d == -1) - { - ec = asio::error::bad_descriptor; - return false; - } - - if (!value && (state & user_set_non_blocking)) - { - // It does not make sense to clear the internal non-blocking flag if the - // user still wants non-blocking behaviour. Return an error and let the - // caller figure out whether to update the user-set non-blocking flag. - ec = asio::error::invalid_argument; - return false; - } - - errno = 0; -#if defined(__SYMBIAN32__) - int result = error_wrapper(::fcntl(d, F_GETFL, 0), ec); - if (result >= 0) - { - errno = 0; - int flag = (value ? (result | O_NONBLOCK) : (result & ~O_NONBLOCK)); - result = error_wrapper(::fcntl(d, F_SETFL, flag), ec); - } -#else // defined(__SYMBIAN32__) - ioctl_arg_type arg = (value ? 1 : 0); - int result = error_wrapper(::ioctl(d, FIONBIO, &arg), ec); -#endif // defined(__SYMBIAN32__) - - if (result >= 0) - { - ec = asio::error_code(); - if (value) - state |= internal_non_blocking; - else - state &= ~internal_non_blocking; - return true; - } - - return false; -} - -std::size_t sync_read(int d, state_type state, buf* bufs, - std::size_t count, bool all_empty, asio::error_code& ec) -{ - if (d == -1) - { - ec = asio::error::bad_descriptor; - return 0; - } - - // A request to read 0 bytes on a stream is a no-op. - if (all_empty) - { - ec = asio::error_code(); - return 0; - } - - // Read some data. - for (;;) - { - // Try to complete the operation without blocking. - errno = 0; - signed_size_type bytes = error_wrapper(::readv( - d, bufs, static_cast<int>(count)), ec); - - // Check if operation succeeded. - if (bytes > 0) - return bytes; - - // Check for EOF. - if (bytes == 0) - { - ec = asio::error::eof; - return 0; - } - - // Operation failed. - if ((state & user_set_non_blocking) - || (ec != asio::error::would_block - && ec != asio::error::try_again)) - return 0; - - // Wait for descriptor to become ready. - if (descriptor_ops::poll_read(d, 0, ec) < 0) - return 0; - } -} - -bool non_blocking_read(int d, buf* bufs, std::size_t count, - asio::error_code& ec, std::size_t& bytes_transferred) -{ - for (;;) - { - // Read some data. - errno = 0; - signed_size_type bytes = error_wrapper(::readv( - d, bufs, static_cast<int>(count)), ec); - - // Check for end of stream. - if (bytes == 0) - { - ec = asio::error::eof; - return true; - } - - // Retry operation if interrupted by signal. - if (ec == asio::error::interrupted) - continue; - - // Check if we need to run the operation again. - if (ec == asio::error::would_block - || ec == asio::error::try_again) - return false; - - // Operation is complete. - if (bytes > 0) - { - ec = asio::error_code(); - bytes_transferred = bytes; - } - else - bytes_transferred = 0; - - return true; - } -} - -std::size_t sync_write(int d, state_type state, const buf* bufs, - std::size_t count, bool all_empty, asio::error_code& ec) -{ - if (d == -1) - { - ec = asio::error::bad_descriptor; - return 0; - } - - // A request to write 0 bytes on a stream is a no-op. - if (all_empty) - { - ec = asio::error_code(); - return 0; - } - - // Write some data. - for (;;) - { - // Try to complete the operation without blocking. - errno = 0; - signed_size_type bytes = error_wrapper(::writev( - d, bufs, static_cast<int>(count)), ec); - - // Check if operation succeeded. - if (bytes > 0) - return bytes; - - // Operation failed. - if ((state & user_set_non_blocking) - || (ec != asio::error::would_block - && ec != asio::error::try_again)) - return 0; - - // Wait for descriptor to become ready. - if (descriptor_ops::poll_write(d, 0, ec) < 0) - return 0; - } -} - -bool non_blocking_write(int d, const buf* bufs, std::size_t count, - asio::error_code& ec, std::size_t& bytes_transferred) -{ - for (;;) - { - // Write some data. - errno = 0; - signed_size_type bytes = error_wrapper(::writev( - d, bufs, static_cast<int>(count)), ec); - - // Retry operation if interrupted by signal. - if (ec == asio::error::interrupted) - continue; - - // Check if we need to run the operation again. - if (ec == asio::error::would_block - || ec == asio::error::try_again) - return false; - - // Operation is complete. - if (bytes >= 0) - { - ec = asio::error_code(); - bytes_transferred = bytes; - } - else - bytes_transferred = 0; - - return true; - } -} - -int ioctl(int d, state_type& state, long cmd, - ioctl_arg_type* arg, asio::error_code& ec) -{ - if (d == -1) - { - ec = asio::error::bad_descriptor; - return -1; - } - - errno = 0; - int result = error_wrapper(::ioctl(d, cmd, arg), ec); - - if (result >= 0) - { - ec = asio::error_code(); - - // When updating the non-blocking mode we always perform the ioctl syscall, - // even if the flags would otherwise indicate that the descriptor is - // already in the correct state. This ensures that the underlying - // descriptor is put into the state that has been requested by the user. If - // the ioctl syscall was successful then we need to update the flags to - // match. - if (cmd == static_cast<long>(FIONBIO)) - { - if (*arg) - { - state |= user_set_non_blocking; - } - else - { - // Clearing the non-blocking mode always overrides any internally-set - // non-blocking flag. Any subsequent asynchronous operations will need - // to re-enable non-blocking I/O. - state &= ~(user_set_non_blocking | internal_non_blocking); - } - } - } - - return result; -} - -int fcntl(int d, int cmd, asio::error_code& ec) -{ - if (d == -1) - { - ec = asio::error::bad_descriptor; - return -1; - } - - errno = 0; - int result = error_wrapper(::fcntl(d, cmd), ec); - if (result != -1) - ec = asio::error_code(); - return result; -} - -int fcntl(int d, int cmd, long arg, asio::error_code& ec) -{ - if (d == -1) - { - ec = asio::error::bad_descriptor; - return -1; - } - - errno = 0; - int result = error_wrapper(::fcntl(d, cmd, arg), ec); - if (result != -1) - ec = asio::error_code(); - return result; -} - -int poll_read(int d, state_type state, asio::error_code& ec) -{ - if (d == -1) - { - ec = asio::error::bad_descriptor; - return -1; - } - - pollfd fds; - fds.fd = d; - fds.events = POLLIN; - fds.revents = 0; - int timeout = (state & user_set_non_blocking) ? 0 : -1; - errno = 0; - int result = error_wrapper(::poll(&fds, 1, timeout), ec); - if (result == 0) - ec = (state & user_set_non_blocking) - ? asio::error::would_block : asio::error_code(); - else if (result > 0) - ec = asio::error_code(); - return result; -} - -int poll_write(int d, state_type state, asio::error_code& ec) -{ - if (d == -1) - { - ec = asio::error::bad_descriptor; - return -1; - } - - pollfd fds; - fds.fd = d; - fds.events = POLLOUT; - fds.revents = 0; - int timeout = (state & user_set_non_blocking) ? 0 : -1; - errno = 0; - int result = error_wrapper(::poll(&fds, 1, timeout), ec); - if (result == 0) - ec = (state & user_set_non_blocking) - ? asio::error::would_block : asio::error_code(); - else if (result > 0) - ec = asio::error_code(); - return result; -} - -int poll_error(int d, state_type state, asio::error_code& ec) -{ - if (d == -1) - { - ec = asio::error::bad_descriptor; - return -1; - } - - pollfd fds; - fds.fd = d; - fds.events = POLLPRI | POLLERR | POLLHUP; - fds.revents = 0; - int timeout = (state & user_set_non_blocking) ? 0 : -1; - errno = 0; - int result = error_wrapper(::poll(&fds, 1, timeout), ec); - if (result == 0) - ec = (state & user_set_non_blocking) - ? asio::error::would_block : asio::error_code(); - else if (result > 0) - ec = asio::error_code(); - return result; -} - -} // namespace descriptor_ops -} // namespace detail -} // namespace asio - -#include "asio/detail/pop_options.hpp" - -#endif // !defined(ASIO_WINDOWS) - // && !defined(ASIO_WINDOWS_RUNTIME) - // && !defined(__CYGWIN__) - -#endif // ASIO_DETAIL_IMPL_DESCRIPTOR_OPS_IPP |