usr/src/cmd/rcap/rcapd/rcapd_rfd.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _RCAPD_RFD_H
  28 #define _RCAPD_RFD_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 #include <sys/types.h>
  37 #include "rcapd.h"
  38
  39 /*
  40  * Classes of cached, revocable file descriptors
  41  */
  42 typedef enum {
  43         RFD_PAGEDATA = 1,       /* pagedata is always preferred over psinfo */
  44         RFD_PSINFO,             /* psinfo, at least one of which is */
  45                                 /* cached at any time */
  46         RFD_XMAP,               /* xmap */
  47         RFD_RESERVED            /* opened for use by external consumers */
  48 } rfd_class_t;
  49
  50 /*
  51  * Revocable file descriptor
  52  */
  53 typedef struct rfd {
  54         int rfd_fd;                             /* cached descriptor */
  55         rfd_class_t rfd_class;                  /* class of descriptor */
  56         void(*rfd_revoke)(struct rfd *);        /* revocation function */
  57         void *rfd_data;                         /* supplied data */
  58
  59         struct rfd *rfd_next;                   /* list */
  60         struct rfd *rfd_prev;
  61
  62         struct rfd *rfd_prev_class;             /* link to previous of same */
  63                                                 /* class */
  64 } rfd_t;
  65
  66 int rfd_close(int);
  67 int rfd_open(char *, int, rfd_class_t, void(*)(struct rfd *), void *, int,
  68     mode_t);
  69 int rfd_reserve(int);
  70
  71 #ifdef  __cplusplus
  72 }
  73 #endif
  74
  75 #endif /* _RCAPD_RFD_H */