整理

include/boost/process/v1/detail/posix/fd.hpp

@@ -0,0 +1,102 @@
+// Copyright (c) 2006, 2007 Julio M. Merino Vidal
+// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
+// Copyright (c) 2009 Boris Schaeling
+// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
+// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
+//
+// 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 BOOST_PROCESS_DETAIL_POSIX_FD_HPP
+#define BOOST_PROCESS_DETAIL_POSIX_FD_HPP
+
+#include <boost/process/v1/detail/posix/handler.hpp>
+#include <unistd.h>
+#include <boost/process/v1/detail/used_handles.hpp>
+#include <array>
+
+namespace boost { namespace process { BOOST_PROCESS_V1_INLINE namespace v1 { namespace detail { namespace posix {
+
+
+struct close_fd_ : handler_base_ext, ::boost::process::v1::detail::uses_handles
+{
+    close_fd_(int fd) : fd_(fd) {}
+
+    template <class PosixExecutor>
+    void on_exec_setup(PosixExecutor& e) const
+    {
+        if (::close(fd_) == -1)
+            e.set_error(::boost::process::v1::detail::get_last_error(), "close() failed");
+    }
+
+    int get_used_handles() {return fd_;}
+
+
+private:
+    int fd_;
+};
+
+template <class Range>
+struct close_fds_ : handler_base_ext, ::boost::process::v1::detail::uses_handles
+{
+public:
+    close_fds_(const Range &fds) : fds_(fds) {}
+
+    template <class PosixExecutor>
+    void on_exec_setup(PosixExecutor& e) const
+    {
+        for (auto & fd_ : fds_)
+            if (::close(fd_) == -1)
+            {
+                 e.set_error(::boost::process::v1::detail::get_last_error(), "close() failed");
+                 break;
+            }
+    }
+
+    Range& get_used_handles() {return fds_;}
+
+private:
+    Range fds_;
+};
+
+
+
+template <class FileDescriptor>
+struct bind_fd_ : handler_base_ext, ::boost::process::v1::detail::uses_handles
+{
+public:
+    bind_fd_(int id, const FileDescriptor &fd) : id_(id), fd_(fd) {}
+
+    template <class PosixExecutor>
+    void on_exec_setup(PosixExecutor& e) const
+    {
+        if (::dup2(fd_, id_) == -1)
+             e.set_error(::boost::process::v1::detail::get_last_error(), "dup2() failed");
+    }
+
+    std::array<int, 2> get_used_handles() {return {id_, fd_};}
+
+
+private:
+    int id_;
+    FileDescriptor fd_;
+};
+
+
+struct fd_
+{
+    constexpr fd_() {};
+    close_fd_ close(int _fd) const {return close_fd_(_fd);}
+    close_fds_<std::vector<int>> close(const std::initializer_list<int> & vec) const {return std::vector<int>(vec);}
+    template<typename Range>
+    close_fds_<Range> close(const Range & r) const {return r;}
+
+    template <class FileDescriptor>
+    bind_fd_<FileDescriptor> bind(int id, const FileDescriptor & fd) const {return {id, fd};}
+
+};
+
+
+}}}}}
+
+#endif