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Annotation of fam/fam/IMon.h, Revision 1.1

1.1     ! trev        1: //  Copyright (C) 1999 Silicon Graphics, Inc.  All Rights Reserved.
        !             2: //
        !             3: //  This program is free software; you can redistribute it and/or modify it
        !             4: //  under the terms of version 2 of the GNU General Public License as
        !             5: //  published by the Free Software Foundation.
        !             6: //
        !             7: //  This program is distributed in the hope that it would be useful, but
        !             8: //  WITHOUT ANY WARRANTY; without even the implied warranty of
        !             9: //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  Further, any
        !            10: //  license provided herein, whether implied or otherwise, is limited to
        !            11: //  this program in accordance with the express provisions of the GNU
        !            12: //  General Public License.  Patent licenses, if any, provided herein do not
        !            13: //  apply to combinations of this program with other product or programs, or
        !            14: //  any other product whatsoever.  This program is distributed without any
        !            15: //  warranty that the program is delivered free of the rightful claim of any
        !            16: //  third person by way of infringement or the like.  See the GNU General
        !            17: //  Public License for more details.
        !            18: //
        !            19: //  You should have received a copy of the GNU General Public License along
        !            20: //  with this program; if not, write the Free Software Foundation, Inc., 59
        !            21: //  Temple Place - Suite 330, Boston MA 02111-1307, USA.
        !            22:
        !            23: #ifndef IMon_included
        !            24: #define IMon_included
        !            25:
        !            26: #include "config.h"
        !            27: #include <sys/stat.h>
        !            28: #include <sys/types.h>
        !            29:
        !            30: #include "Boolean.h"
        !            31:
        !            32: struct stat;
        !            33:
        !            34: //  IMon is an object encapsulating the interface to /dev/imon.
        !            35: //  There can only be one instantiation of the IMon object.
        !            36: //
        !            37: //  The user of this object uses express() and revoke() to
        !            38: //  express/revoke interest in a file to imon.  There is also
        !            39: //  a callback, the EventHandler.  When an imon event comes in,
        !            40: //  the EventHandler is called.
        !            41: //
        !            42: //  The user of the IMon object is the Interest class.
        !            43:
        !            44: class IMon {
        !            45:
        !            46: public:
        !            47:
        !            48:     enum Status { OK = 0, BAD = -1 };
        !            49:     enum Event { EXEC, EXIT, CHANGE };
        !            50:
        !            51:     typedef void (*EventHandler)(dev_t, ino_t, int event);
        !            52:
        !            53:     IMon(EventHandler h);
        !            54:     ~IMon();
        !            55:
        !            56:     static bool is_active();
        !            57:
        !            58:     Status express(const char *name, struct stat *stat_return);
        !            59:     Status revoke(const char *name, dev_t dev, ino_t ino);
        !            60:
        !            61: private:
        !            62:
        !            63:     //  Class Variables
        !            64:
        !            65:     static int imonfd;
        !            66:     static EventHandler ehandler;
        !            67:
        !            68:     static void read_handler(int fd, void *closure);
        !            69:
        !            70:
        !            71:     //
        !            72:     // Low-level imon routines.
        !            73:     //
        !            74:     static int imon_open();
        !            75:     Status imon_express(const char *name, struct stat *stat_return);
        !            76:     Status imon_revoke(const char *name, dev_t dev, ino_t ino);
        !            77:
        !            78:     IMon(const IMon&);			// Do not copy
        !            79:     IMon & operator = (const IMon&);		//  or assign.
        !            80:
        !            81: };
        !            82:
        !            83: #endif /* !IMon_included */