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Diffstat (limited to 'db2/include/os_func.h')
| -rw-r--r-- | db2/include/os_func.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/db2/include/os_func.h b/db2/include/os_func.h new file mode 100644 index 0000000000..0a72942903 --- /dev/null +++ b/db2/include/os_func.h @@ -0,0 +1,76 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1997 + * Sleepycat Software. All rights reserved. + * + * @(#)os_func.h 10.2 (Sleepycat) 10/28/97 + */ + +/* Calls which can be replaced by the application. */ +struct __db_jumptab { + void *(*db_calloc) __P((size_t, size_t)); /* DB_FUNC_CALLOC */ + int (*db_close) __P((int)); /* DB_FUNC_CLOSE */ + void (*db_dirfree) __P((char **, int)); /* DB_FUNC_DIRFREE */ + int (*db_dirlist) /* DB_FUNC_DIRLIST */ + __P((const char *, char ***, int *)); + int (*db_exists) /* DB_FUNC_EXISTS */ + __P((const char *, int *)); + void (*db_free) __P((void *)); /* DB_FUNC_FREE */ + int (*db_fsync) __P((int)); /* DB_FUNC_FSYNC */ + int (*db_ioinfo) /* DB_FUNC_IOINFO */ + __P((const char *, int, off_t *, off_t *)); + void *(*db_malloc) __P((size_t)); /* DB_FUNC_MALLOC */ + int (*db_map) /* DB_FUNC_MAP */ + __P((int, size_t, int, int, void **)); + int (*db_open) /* DB_FUNC_OPEN */ + __P((const char *, int, ...)); + ssize_t (*db_read) __P((int, void *, size_t)); /* DB_FUNC_READ */ + void *(*db_realloc) __P((void *, size_t)); /* DB_FUNC_REALLOC */ + int (*db_seek) /* DB_FUNC_SEEK */ + __P((int, size_t, db_pgno_t, u_long, int)); + int (*db_sleep) __P((u_long, u_long)); /* DB_FUNC_SLEEP */ + char *(*db_strdup) __P((const char *)); /* DB_FUNC_STRDUP */ + int (*db_unlink) __P((const char *)); /* DB_FUNC_UNLINK */ + int (*db_unmap) __P((void *, size_t)); /* DB_FUNC_UNMAP */ + ssize_t (*db_write) /* DB_FUNC_WRITE */ + __P((int, const void *, size_t)); + int (*db_yield) __P((void)); /* DB_FUNC_YIELD */ +}; + +extern struct __db_jumptab __db_jump; + +/* + * Names used by DB to call through the jump table. + * + * The naming scheme goes like this: if the functionality the application can + * replace is the same as the DB functionality, e.g., calloc, or dirlist, then + * we use the name __db_XXX, and the application is expected to replace the + * complete functionality, which may or may not map directly to an ANSI C or + * POSIX 1003.1 interface. If the functionality that the aplication replaces + * only underlies what the DB os directory exports to other parts of DB, e.g., + * read, then the name __os_XXX is used, and the application can only replace + * the underlying functionality. Under most circumstances, the os directory + * part of DB is the only code that should use the __os_XXX names, all other + * parts of DB should be calling __db_XXX functions. + */ +#define __db_calloc __db_jump.db_calloc +#define __os_close __db_jump.db_close /* __db_close is a wrapper. */ +#define __db_dirfree __db_jump.db_dirfree +#define __db_dirlist __db_jump.db_dirlist +#define __db_exists __db_jump.db_exists +#define __db_free __db_jump.db_free +#define __os_fsync __db_jump.db_fsync /* __db_fsync is a wrapper. */ +#define __db_ioinfo __db_jump.db_ioinfo +#define __db_malloc __db_jump.db_malloc +#define __db_map __db_jump.db_map +#define __os_open __db_jump.db_open /* __db_open is a wrapper. */ +#define __os_read __db_jump.db_read /* __db_read is a wrapper. */ +#define __db_realloc __db_jump.db_realloc +#define __db_seek __db_jump.db_seek +#define __db_sleep __db_jump.db_sleep +#define __db_strdup __db_jump.db_strdup +#define __os_unlink __db_jump.db_unlink /* __db_unlink is a wrapper. */ +#define __db_unmap __db_jump.db_unmap +#define __os_write __db_jump.db_write /* __db_write is a wrapper. */ +#define __db_yield __db_jump.db_yield |