diff options
Diffstat (limited to 'include/db.h')
| -rw-r--r-- | include/db.h | 96 |
1 files changed, 59 insertions, 37 deletions
diff --git a/include/db.h b/include/db.h index 2b7de273a517..f89cbbb7c5c7 100644 --- a/include/db.h +++ b/include/db.h @@ -30,7 +30,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * @(#)db.h 8.1 (Berkeley) 6/2/93 + * @(#)db.h 8.3 (Berkeley) 10/12/93 */ #ifndef _DB_H_ @@ -40,6 +40,8 @@ #include <sys/cdefs.h> #include <machine/endian.h> +#include <limits.h> + #define RET_ERROR -1 /* Return values. */ #define RET_SUCCESS 0 #define RET_SPECIAL 1 @@ -72,20 +74,40 @@ typedef struct { typedef enum { DB_BTREE, DB_HASH, DB_RECNO } DBTYPE; -#define __USE_OPEN_FLAGS \ - (O_CREAT|O_EXCL|O_EXLOCK|O_RDONLY|O_RDWR|O_SHLOCK|O_TRUNC) +/* + * !!! + * The following flags are included in the dbopen(3) call as part of the + * open(2) flags. In order to avoid conflicts with the open flags, start + * at the top of the 16 or 32-bit number space and work our way down. If + * the open flags were significantly expanded in the future, it could be + * a problem. Wish I'd left another flags word in the dbopen call. + * + * !!! + * None of this stuff is implemented yet. The only reason that it's here + * is so that the access methods can skip copying the key/data pair when + * the DB_LOCK flag isn't set. + */ +#if UINT_MAX > 65535 +#define DB_LOCK 0x20000000 /* Do locking. */ +#define DB_SHMEM 0x40000000 /* Use shared memory. */ +#define DB_TXN 0x80000000 /* Do transactions. */ +#else +#define DB_LOCK 0x00002000 /* Do locking. */ +#define DB_SHMEM 0x00004000 /* Use shared memory. */ +#define DB_TXN 0x00008000 /* Do transactions. */ +#endif /* Access method description structure. */ typedef struct __db { - DBTYPE type; /* underlying db type */ + DBTYPE type; /* Underlying db type. */ int (*close) __P((struct __db *)); int (*del) __P((const struct __db *, const DBT *, u_int)); - int (*fd) __P((const struct __db *)); int (*get) __P((const struct __db *, const DBT *, DBT *, u_int)); int (*put) __P((const struct __db *, DBT *, const DBT *, u_int)); int (*seq) __P((const struct __db *, DBT *, DBT *, u_int)); int (*sync) __P((const struct __db *, u_int)); - void *internal; /* access method private */ + void *internal; /* Access method private. */ + int (*fd) __P((const struct __db *)); } DB; #define BTREEMAGIC 0x053162 @@ -139,25 +161,25 @@ typedef struct { * BLPSWAP swap a referenced memory location * BLSWAP_COPY swap from one location to another */ -#define BLSWAP(a) { \ - u_long _tmp = a; \ - ((char *)&a)[0] = ((char *)&_tmp)[3]; \ - ((char *)&a)[1] = ((char *)&_tmp)[2]; \ - ((char *)&a)[2] = ((char *)&_tmp)[1]; \ - ((char *)&a)[3] = ((char *)&_tmp)[0]; \ +#define BLSWAP(a) { \ + u_long _tmp = a; \ + ((char *)&a)[0] = ((char *)&_tmp)[3]; \ + ((char *)&a)[1] = ((char *)&_tmp)[2]; \ + ((char *)&a)[2] = ((char *)&_tmp)[1]; \ + ((char *)&a)[3] = ((char *)&_tmp)[0]; \ } -#define BLPSWAP(a) { \ - u_long _tmp = *(u_long *)a; \ - ((char *)a)[0] = ((char *)&_tmp)[3]; \ - ((char *)a)[1] = ((char *)&_tmp)[2]; \ - ((char *)a)[2] = ((char *)&_tmp)[1]; \ - ((char *)a)[3] = ((char *)&_tmp)[0]; \ +#define BLPSWAP(a) { \ + u_long _tmp = *(u_long *)a; \ + ((char *)a)[0] = ((char *)&_tmp)[3]; \ + ((char *)a)[1] = ((char *)&_tmp)[2]; \ + ((char *)a)[2] = ((char *)&_tmp)[1]; \ + ((char *)a)[3] = ((char *)&_tmp)[0]; \ } -#define BLSWAP_COPY(a, b) { \ - ((char *)&(b))[0] = ((char *)&(a))[3]; \ - ((char *)&(b))[1] = ((char *)&(a))[2]; \ - ((char *)&(b))[2] = ((char *)&(a))[1]; \ - ((char *)&(b))[3] = ((char *)&(a))[0]; \ +#define BLSWAP_COPY(a, b) { \ + ((char *)&(b))[0] = ((char *)&(a))[3]; \ + ((char *)&(b))[1] = ((char *)&(a))[2]; \ + ((char *)&(b))[2] = ((char *)&(a))[1]; \ + ((char *)&(b))[3] = ((char *)&(a))[0]; \ } /* @@ -166,28 +188,28 @@ typedef struct { * BSPSWAP swap a referenced memory location * BSSWAP_COPY swap from one location to another */ -#define BSSWAP(a) { \ - u_short _tmp = a; \ - ((char *)&a)[0] = ((char *)&_tmp)[1]; \ - ((char *)&a)[1] = ((char *)&_tmp)[0]; \ +#define BSSWAP(a) { \ + u_short _tmp = a; \ + ((char *)&a)[0] = ((char *)&_tmp)[1]; \ + ((char *)&a)[1] = ((char *)&_tmp)[0]; \ } -#define BSPSWAP(a) { \ - u_short _tmp = *(u_short *)a; \ - ((char *)a)[0] = ((char *)&_tmp)[1]; \ - ((char *)a)[1] = ((char *)&_tmp)[0]; \ +#define BSPSWAP(a) { \ + u_short _tmp = *(u_short *)a; \ + ((char *)a)[0] = ((char *)&_tmp)[1]; \ + ((char *)a)[1] = ((char *)&_tmp)[0]; \ } -#define BSSWAP_COPY(a, b) { \ - ((char *)&(b))[0] = ((char *)&(a))[1]; \ - ((char *)&(b))[1] = ((char *)&(a))[0]; \ +#define BSSWAP_COPY(a, b) { \ + ((char *)&(b))[0] = ((char *)&(a))[1]; \ + ((char *)&(b))[1] = ((char *)&(a))[0]; \ } __BEGIN_DECLS DB *dbopen __P((const char *, int, int, DBTYPE, const void *)); #ifdef __DBINTERFACE_PRIVATE -DB *__bt_open __P((const char *, int, int, const BTREEINFO *)); -DB *__hash_open __P((const char *, int, int, const HASHINFO *)); -DB *__rec_open __P((const char *, int, int, const RECNOINFO *)); +DB *__bt_open __P((const char *, int, int, const BTREEINFO *, int)); +DB *__hash_open __P((const char *, int, int, const HASHINFO *, int)); +DB *__rec_open __P((const char *, int, int, const RECNOINFO *, int)); void __dbpanic __P((DB *dbp)); #endif __END_DECLS |