/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1997, 1998
 *      Sleepycat Software.  All rights reserved.
 *
 *      @(#)os.h        10.11 (Sleepycat) 10/12/98
 */

/*
 * We group seek/write calls into a single function so that we can use
 * pread(2)/pwrite(2) where they're available.
 */
#define DB_IO_READ      1
#define DB_IO_WRITE     2
typedef struct __io {
        int         fd_io;              /* I/O file descriptor. */
        int         fd_lock;            /* Locking file descriptor. */
        db_mutex_t *mutexp;             /* Mutex to lock. */
        size_t      pagesize;           /* Page size. */
        db_pgno_t   pgno;               /* Page number. */
        u_int8_t   *buf;                /* Buffer. */
        size_t      bytes;              /* Bytes read/written. */
} DB_IO;