| /* scoped_fd, automatically close a file descriptor |
| |
| Copyright (C) 2018-2024 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef COMMON_SCOPED_FD_H |
| #define COMMON_SCOPED_FD_H |
| |
| #include <unistd.h> |
| #include "gdb_file.h" |
| |
| /* A smart-pointer-like class to automatically close a file descriptor. */ |
| |
| class scoped_fd |
| { |
| public: |
| explicit scoped_fd (int fd = -1) noexcept : m_fd (fd) {} |
| |
| scoped_fd (scoped_fd &&other) noexcept |
| : m_fd (other.m_fd) |
| { |
| other.m_fd = -1; |
| } |
| |
| ~scoped_fd () |
| { |
| if (m_fd >= 0) |
| close (m_fd); |
| } |
| |
| scoped_fd &operator= (scoped_fd &&other) |
| { |
| if (m_fd != other.m_fd) |
| { |
| if (m_fd >= 0) |
| close (m_fd); |
| m_fd = other.m_fd; |
| other.m_fd = -1; |
| } |
| return *this; |
| } |
| |
| DISABLE_COPY_AND_ASSIGN (scoped_fd); |
| |
| ATTRIBUTE_UNUSED_RESULT int release () noexcept |
| { |
| int fd = m_fd; |
| m_fd = -1; |
| return fd; |
| } |
| |
| /* Like release, but return a gdb_file_up that owns the file |
| descriptor. On success, this scoped_fd will be released. On |
| failure, return NULL and leave this scoped_fd in possession of |
| the fd. */ |
| gdb_file_up to_file (const char *mode) noexcept |
| { |
| gdb_file_up result (fdopen (m_fd, mode)); |
| if (result != nullptr) |
| m_fd = -1; |
| return result; |
| } |
| |
| int get () const noexcept |
| { |
| return m_fd; |
| } |
| |
| private: |
| int m_fd; |
| }; |
| |
| #endif /* COMMON_SCOPED_FD_H */ |