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44 lines
1.0 KiB
44 lines
1.0 KiB
3 years ago
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/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997, 1998, 1999
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* Sleepycat Software. All rights reserved.
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*
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* @(#)os.h 11.1 (Sleepycat) 7/25/99
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*/
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#if defined(_MSC_VER)
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#include <windows.h>
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#endif
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/*
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* Filehandle.
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*/
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struct __fh_t {
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#if defined(_MSC_VER) /* _WIN32 */
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HANDLE handle; /* Windows/32 file handle. */
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#endif
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int fd; /* POSIX file descriptor. */
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u_int32_t log_size; /* XXX: Log file size. */
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#define DB_FH_NOSYNC 0x01 /* Handle doesn't need to be sync'd. */
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#define DB_FH_VALID 0x02 /* Handle is valid. */
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u_int8_t flags;
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};
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/*
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* We group certain seek/write calls into a single function so that we
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* can use pread(2)/pwrite(2) where they're available.
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*/
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#define DB_IO_READ 1
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#define DB_IO_WRITE 2
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typedef struct __io_t {
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DB_FH *fhp; /* I/O file handle. */
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MUTEX *mutexp; /* Mutex to lock. */
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size_t pagesize; /* Page size. */
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db_pgno_t pgno; /* Page number. */
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u_int8_t *buf; /* Buffer. */
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size_t bytes; /* Bytes read/written. */
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} DB_IO;
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