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Annotation of nono/lib/autofd.h, revision 1.1.1.5

1.1.1.5 ! root        1: /*
        !             2:  * Copyright (C) 2020 Tetsuya Isaki
        !             3:  *
        !             4:  * Permission to use, copy, modify, and/or distribute this software for any
        !             5:  * purpose with or without fee is hereby granted.
        !             6:  *
        !             7:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !             8:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !             9:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            10:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            11:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            12:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            13:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            14:  */
1.1       root       15: 
1.1.1.4   root       16: //
                     17: // autofd
                     18: //
                     19: 
1.1.1.2   root       20: #pragma once
                     21: 
1.1       root       22: #include <unistd.h>
                     23: 
                     24: // 自動変数みたいな生存期間を持つディスクリプタ
                     25: class autofd
                     26: {
                     27:  public:
                     28:        autofd() {
                     29:                fd = -1;
                     30:        }
                     31:        autofd(int fd_) {
                     32:                fd = fd_;
                     33:        }
                     34: 
                     35:        ~autofd() {
1.1.1.3   root       36:                Close();
1.1       root       37:        }
                     38: 
                     39:        autofd& operator=(int fd_) {
                     40:                fd = fd_;
                     41:                return *this;
                     42:        }
                     43:        operator int() const {
                     44:                return fd;
                     45:        }
                     46: 
                     47:        // 明示的にクローズする
                     48:        int Close() {
                     49:                int rv = 0;
1.1.1.3   root       50:                if (Valid()) {
1.1       root       51:                        rv = close(fd);
                     52:                        fd = -1;
                     53:                }
                     54:                return rv;
                     55:        }
                     56: 
1.1.1.2   root       57:        // fd が有効なら true を返す
                     58:        bool Valid() const {
                     59:                return (fd >= 0);
                     60:        }
                     61: 
1.1.1.4   root       62:  private:
1.1       root       63:        int fd;
                     64: };

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