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Annotation of fam/fam/ServerHostRef.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 ServerHostRef_included
        !            24: #define ServerHostRef_included
        !            25:
        !            26: #include "ServerHost.h"
        !            27: #include "StringTable.h"
        !            28:
        !            29: //  ServerHostRef is a reference-counted pointer to a ServerHost.
        !            30: //
        !            31: //  A ServerHostRef is created by specifying the name of a
        !            32: //  host.  The pointed-to ServerHost will be shared with other
        !            33: //  Refs to the same host, even under different names.
        !            34:
        !            35: class ServerHostRef {
        !            36:
        !            37: public:
        !            38:
        !            39:     ServerHostRef()			: p(0) { count++; }
        !            40:     ServerHostRef(const char *name)	: p(find(name))
        !            41: 					{ p->refcount++; count++; }
        !            42:     ServerHostRef(const ServerHostRef& that)
        !            43: 					: p(that.p)
        !            44: 					{ if (p) p->refcount++; count++; }
        !            45:     ServerHostRef& operator = (const ServerHostRef&);
        !            46:     ~ServerHostRef();
        !            47:
        !            48:     ServerHost *operator -> ()		{ assert(p); return p; }
        !            49:     const ServerHost *operator -> () const { assert(p); return p; }
        !            50:
        !            51: private:
        !            52:
        !            53:     // Instance Variable
        !            54:
        !            55:     ServerHost *p;
        !            56:
        !            57:     //  Class Variables
        !            58:
        !            59:     static unsigned count;		// number of handles extant
        !            60:     static StringTable<ServerHost *> *hosts_by_name;
        !            61:
        !            62:     //  Private Instance Methods
        !            63:
        !            64:     ServerHostRef(ServerHost& that)	: p(&that) { p->refcount++; count++; }
        !            65:
        !            66:     //  Private Class Methods
        !            67:
        !            68:     static ServerHost *find(const char *name);
        !            69:
        !            70: };
        !            71:
        !            72: #endif /* !ServerHost_included */