68 lines
1.4 KiB
C++
68 lines
1.4 KiB
C++
#ifndef BASE_UNIQUE_HANDLE_H
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#define BASE_UNIQUE_HANDLE_H
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#include <list>
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#include <memory>
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#include <unistd.h>
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//----------------------------------------------------------------
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namespace base {
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template <typename T, T TNul = T()>
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class unique_handle
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{
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public:
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unique_handle(std::nullptr_t = nullptr)
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: id_(TNul) {
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}
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unique_handle(T x)
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: id_(x) {
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}
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explicit operator bool() const {
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return id_ != TNul;
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}
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operator T&() {
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return id_;
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}
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operator T() const {
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return id_;
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}
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T *operator&() {
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return &id_;
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}
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const T *operator&() const {
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return &id_;
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}
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friend bool operator == (unique_handle a, unique_handle b) { return a.id_ == b.id_; }
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friend bool operator != (unique_handle a, unique_handle b) { return a.id_ != b.id_; }
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friend bool operator == (unique_handle a, std::nullptr_t) { return a.id_ == TNul; }
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friend bool operator != (unique_handle a, std::nullptr_t) { return a.id_ != TNul; }
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friend bool operator == (std::nullptr_t, unique_handle b) { return TNul == b.id_; }
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friend bool operator != (std::nullptr_t, unique_handle b) { return TNul != b.id_; }
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private:
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T id_;
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};
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//--------------------------------
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struct fd_deleter {
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typedef unique_handle<int, -1> pointer;
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void operator()(pointer p) {
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::close(p);
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}
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};
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typedef std::unique_ptr<int, fd_deleter> unique_fd;
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}
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//----------------------------------------------------------------
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#endif
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