00001 /*- 00002 * See the file LICENSE for redistribution information. 00003 * 00004 * Copyright (c) 1997, 1998, 1999, 2000 00005 * Sleepycat Software. All rights reserved. 00006 * 00007 * $Id: os_8h-source.html,v 1.1 2008年06月08日 10:21:04 sebdiaz Exp $ 00008 */ 00009 00010 #if defined(__cplusplus) 00011 extern "C" { 00012 #endif 00013 /* 00014 * Filehandle. 00015 */ 00016 struct __fh_t { 00017 #if defined(_WIN32) 00018 HANDLE handle; /* Windows/32 file handle. */ 00019 #endif 00020 int fd; /* POSIX file descriptor. */ 00021 00022 u_int32_t log_size; /* XXX: Log file size. */ 00023 00024 #define DB_FH_NOSYNC 0x01 /* Handle doesn't need to be sync'd. */ 00025 #define DB_FH_VALID 0x02 /* Handle is valid. */ 00026 u_int8_t flags; 00027 }; 00028 00029 /* 00030 * We group certain seek/write calls into a single function so that we 00031 * can use pread(2)/pwrite(2) where they're available. 00032 */ 00033 #define DB_IO_READ 1 00034 #define DB_IO_WRITE 2 00035 typedef struct __io_t { 00036 DB_FH *fhp; /* I/O file handle. */ 00037 MUTEX *mutexp; /* Mutex to lock. */ 00038 size_t pagesize; /* Page size. */ 00039 db_pgno_t pgno; /* Page number. */ 00040 u_int8_t *buf; /* Buffer. */ 00041 size_t bytes; /* Bytes read/written. */ 00042 } DB_IO; 00043 00044 #if defined(__cplusplus) 00045 } 00046 #endif