Antonio Cossari
62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* FileDescriptor.hpp :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: acossari <acossari@student.codam.nl> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2026/08/24 16:24:03 by acossari #+# #+# */
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/* Updated: 2026/08/24 20:05:59 by acossari ### ########.fr */
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/* */
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/* ************************************************************************** */
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#pragma once
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#include <exception>
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#include <string>
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namespace webserv {
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// Sole owner of one file descriptor, move-only. Copying would give two owners
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// the same number, and the second close would land on whatever the kernel had
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// handed out in the meantime, killing an unrelated connection.
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class FileDescriptor final {
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public:
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class Error : public std::exception {
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public:
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explicit Error(std::string message);
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const char* what() const noexcept override;
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private:
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std::string msg_;
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};
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FileDescriptor() = default;
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// Takes ownership and sets FD_CLOEXEC, so a successful execve() in a
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// forked child closes the descriptor before the new program starts. A
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// negative fd is accepted and gives an invalid object instead of throwing,
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// so the result of socket() can be passed in and checked with valid().
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explicit FileDescriptor(int fd);
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~FileDescriptor();
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FileDescriptor(const FileDescriptor&) = delete;
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FileDescriptor& operator=(const FileDescriptor&) = delete;
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FileDescriptor(FileDescriptor&& other) noexcept;
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FileDescriptor& operator=(FileDescriptor&& other) noexcept;
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int get() const noexcept { return fd_; }
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bool valid() const noexcept { return fd_ >= 0; }
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void setNonBlocking();
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// Closes now instead of at destruction. Idempotent.
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void reset() noexcept;
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private:
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int fd_ = -1;
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};
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} // namespace webserv
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