glibc/db2/include/db_int.h.src
Ulrich Drepper bf7997b65c Update.
1998-06-09  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/netinet/ip.h (struct ip_options): Define
	__data member only for gcc.  Reported by ak@muc.de.

	* misc/mntent.h: Undo last patch.
	* sysdeps/unix/sysv/linux/fstatvfs.c (fstatvfs): Undo last patch.
	* misc/tst/mntent.c: Adjust code for this change.

	* io/fts.c: Updated from a slightly more recent BSD version.
	* io/fts.h: Likewise.

	* libc.map: Add __libc_stack_end.

	* db2/Makefile (routines): Add lock_region.
	* db2/config.h: Update from db-2.4.14.
	* db2/db.h: Likewise.
	* db2/db_185.h: Likewise.
	* db2/db_int.h: Likewise.
	* db2/bt_close.c: Likewise.
	* db2/bt_compare.c: Likewise.
	* db2/bt_conv.c: Likewise.
	* db2/bt_cursor.c: Likewise.
	* db2/bt_delete.c: Likewise.
	* db2/bt_open.c: Likewise.
	* db2/bt_page.c: Likewise.
	* db2/bt_put.c: Likewise.
	* db2/bt_rec.c: Likewise.
	* db2/bt_recno.c: Likewise.
	* db2/bt_rsearch.c: Likewise.
	* db2/bt_search.c: Likewise.
	* db2/bt_split.c: Likewise.
	* db2/bt_stat.c: Likewise.
	* db2/btree.src: Likewise.
	* db2/btree_auto.c: Likewise.
	* db2/getlong.c: Likewise.
	* db2/db_appinit.c: Likewise.
	* db2/db_apprec.c: Likewise.
	* db2/db_byteorder.c: Likewise.
	* db2/db_err.c: Likewise.
	* db2/db_log2.c: Likewise.
	* db2/db_region.c: Likewise.
	* db2/db_salloc.c: Likewise.
	* db2/db_shash.c: Likewise.
	* db2/db.c: Likewise.
	* db2/db.src: Likewise.
	* db2/db_auto.c: Likewise.
	* db2/db_conv.c: Likewise.
	* db2/db_dispatch.c: Likewise.
	* db2/db_dup.c: Likewise.
	* db2/db_overflow.c: Likewise.
	* db2/db_pr.c: Likewise.
	* db2/db_rec.c: Likewise.
	* db2/db_ret.c: Likewise.
	* db2/db_thread.c: Likewise.
	* db2/db185.c: Likewise.
	* db2/db185_int.h: Likewise.
	* db2/dbm.c: Likewise.
	* db2/hash.c: Likewise.
	* db2/hash.src: Likewise.
	* db2/hash_auto.c: Likewise.
	* db2/hash_conv.c: Likewise.
	* db2/hash_debug.c: Likewise.
	* db2/hash_dup.c: Likewise.
	* db2/hash_func.c: Likewise.
	* db2/hash_page.c: Likewise.
	* db2/hash_rec.c: Likewise.
	* db2/hash_stat.c: Likewise.
	* db2/btree.h: Likewise.
	* db2/btree_ext.h: Likewise.
	* db2/clib_ext.h: Likewise.
	* db2/common_ext.h: Likewise.
	* db2/cxx_int.h: Likewise.
	* db2/db.h.src: Likewise.
	* db2/db_185.h.src: Likewise.
	* db2/db_am.h: Likewise.
	* db2/db_auto.h: Likewise.
	* db2/db_cxx.h: Likewise.
	* db2/db_dispatch.h: Likewise.
	* db2/db_ext.h: Likewise.
	* db2/db_int.h.src: Likewise.
	* db2/db_page.h: Likewise.
	* db2/db_shash.h: Likewise.
	* db2/db_swap.h: Likewise.
	* db2/hash.h: Likewise.
	* db2/hash_ext.h: Likewise.
	* db2/lock.h: Likewise.
	* db2/lock_ext.h: Likewise.
	* db2/log.h: Likewise.
	* db2/log_ext.h: Likewise.
	* db2/mp.h: Likewise.
	* db2/mp_ext.h: Likewise.
	* db2/mutex_ext.h: Likewise.
	* db2/os_ext.h: Likewise.
	* db2/os_func.h: Likewise.
	* db2/queue.h: Likewise.
	* db2/shqueue.h: Likewise.
	* db2/txn.h: Likewise.
	* db2/lock.c: Likewise.
	* db2/lock_conflict.c: Likewise.
	* db2/lock_deadlock.c: Likewise.
	* db2/lock_region.c: Likewise.
	* db2/lock_util.c: Likewise.
	* db2/log.c: Likewise.
	* db2/log.src: Likewise.
	* db2/log_archive.c: Likewise.
	* db2/log_auto.c: Likewise.
	* db2/log_compare.c: Likewise.
	* db2/log_findckp.c: Likewise.
	* db2/log_get.c: Likewise.
	* db2/log_put.c: Likewise.
	* db2/log_rec.c: Likewise.
	* db2/log_register.c: Likewise.
	* db2/mp_bh.c: Likewise.
	* db2/mp_fget.c: Likewise.
	* db2/mp_fopen.c: Likewise.
	* db2/mp_fput.c: Likewise.
	* db2/mp_fset.c: Likewise.
	* db2/mp_open.c: Likewise.
	* db2/mp_pr.c: Likewise.
	* db2/mp_region.c: Likewise.
	* db2/mp_sync.c: Likewise.
	* db2/68020.gcc: Likewise.
	* db2/mutex.c: Likewise.
	* db2/parisc.gcc: Likewise.
	* db2/parisc.hp: Likewise.
	* db2/sco.cc: Likewise.
	* db2/os_abs.c: Likewise.
	* db2/os_alloc.c: Likewise.
	* db2/os_config.c: Likewise.
	* db2/os_dir.c: Likewise.
	* db2/os_fid.c: Likewise.
	* db2/os_fsync.c: Likewise.
	* db2/os_map.c: Likewise.
	* db2/os_oflags.c: Likewise.
	* db2/os_open.c: Likewise.
	* db2/os_rpath.c: Likewise.
	* db2/os_rw.c: Likewise.
	* db2/os_seek.c: Likewise.
	* db2/os_sleep.c: Likewise.
	* db2/os_spin.c: Likewise.
	* db2/os_stat.c: Likewise.
	* db2/os_unlink.c: Likewise.
	* db2/db_archive.c: Likewise.
	* db2/db_checkpoint.c: Likewise.
	* db2/db_deadlock.c: Likewise.
	* db2/db_dump.c: Likewise.
	* db2/db_dump185.c: Likewise.
	* db2/db_load.c: Likewise.
	* db2/db_printlog.c: Likewise.
	* db2/db_recover.c: Likewise.
	* db2/db_stat.c: Likewise.
	* db2/txn.c: Likewise.
	* db2/txn.src: Likewise.
	* db2/txn_auto.c: Likewise.
	* db2/txn_rec.c: Likewise.

	* elf/rtld.c: Move definition of __libc_stack_end to ...
	* sysdeps/generic/dl-sysdep.h: ...here.

	* sysdeps/unix/sysv/linux/fstatvfs.c: Handle nodiratime option.
	* sysdeps/unix/sysv/linux/bits/statvfs.h: Define ST_NODIRATIME.
	* sysdeps/unix/sysv/linux/sys/mount.h: Define MS_NODIRATIME.

1998-06-08 21:44  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/fstatvfs.c: Handle constant option string
	from mntent correctly.

1998-06-06  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sunrpc/Makefile (generated): Correct typo.

1998-06-04  Philip Blundell  <philb@gnu.org>

	* elf/elf.h (EM_ARM, et al.): New definitions.
	* sysdeps/arm/dl-machine.h: Update for new draft ARM ELF ABI.
1998-06-09 15:16:55 +00:00

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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997, 1998
* Sleepycat Software. All rights reserved.
*
* @(#)db_int.h.src 10.62 (Sleepycat) 5/23/98
*/
#ifndef _DB_INTERNAL_H_
#define _DB_INTERNAL_H_
#include "db.h" /* Standard DB include file. */
#include "queue.h"
/*******************************************************
* General purpose constants and macros.
*******************************************************/
#define UINT16_T_MAX 0xffff /* Maximum 16 bit unsigned. */
#define UINT32_T_MAX 0xffffffff /* Maximum 32 bit unsigned. */
#define DB_MIN_PGSIZE 0x000200 /* Minimum page size. */
#define DB_MAX_PGSIZE 0x010000 /* Maximum page size. */
#define DB_MINCACHE 10 /* Minimum cached pages */
#define MEGABYTE 1048576
/*
* If we are unable to determine the underlying filesystem block size, use
* 8K on the grounds that most OS's use less than 8K as their VM page size.
*/
#define DB_DEF_IOSIZE (8 * 1024)
/*
* Aligning items to particular sizes or in pages or memory. ALIGNP is a
* separate macro, as we've had to cast the pointer to different integral
* types on different architectures.
*
* We cast pointers into unsigned longs when manipulating them because C89
* guarantees that u_long is the largest available integral type and further,
* to never generate overflows. However, neither C89 or C9X requires that
* any integer type be large enough to hold a pointer, although C9X created
* the intptr_t type, which is guaranteed to hold a pointer but may or may
* not exist. At some point in the future, we should test for intptr_t and
* use it where available.
*/
#undef ALIGNTYPE
#define ALIGNTYPE u_long
#undef ALIGNP
#define ALIGNP(value, bound) ALIGN((ALIGNTYPE)value, bound)
#undef ALIGN
#define ALIGN(value, bound) (((value) + (bound) - 1) & ~((bound) - 1))
/*
* There are several on-page structures that are declared to have a number of
* fields followed by a variable length array of items. The structure size
* without including the variable length array or the address of the first of
* those elements can be found using SSZ.
*
* This macro can also be used to find the offset of a structure element in a
* structure. This is used in various places to copy structure elements from
* unaligned memory references, e.g., pointers into a packed page.
*
* There are two versions because compilers object if you take the address of
* an array.
*/
#undef SSZ
#define SSZ(name, field) ((int)&(((name *)0)->field))
#undef SSZA
#define SSZA(name, field) ((int)&(((name *)0)->field[0]))
/* Macros to return per-process address, offsets based on shared regions. */
#define R_ADDR(base, offset) ((void *)((u_int8_t *)((base)->addr) + offset))
#define R_OFFSET(base, p) ((u_int8_t *)(p) - (u_int8_t *)(base)->addr)
/* Free and free-string macros that overwrite memory. */
#ifdef DIAGNOSTIC
#undef FREE
#define FREE(p, len) { \
memset(p, 0xff, len); \
__db_free(p); \
}
#undef FREES
#define FREES(p) { \
FREE(p, strlen(p)); \
}
#else
#undef FREE
#define FREE(p, len) { \
__db_free(p); \
}
#undef FREES
#define FREES(p) { \
__db_free(p); \
}
#endif
/* Structure used to print flag values. */
typedef struct __fn {
u_int32_t mask; /* Flag value. */
const char *name; /* Flag name. */
} FN;
/* Set, clear and test flags. */
#define F_SET(p, f) (p)->flags |= (f)
#define F_CLR(p, f) (p)->flags &= ~(f)
#define F_ISSET(p, f) ((p)->flags & (f))
#define LF_SET(f) (flags |= (f))
#define LF_CLR(f) (flags &= ~(f))
#define LF_ISSET(f) (flags & (f))
/* Display separator string. */
#undef DB_LINE
#define DB_LINE "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-="
/* Global variables. */
typedef struct __db_globals {
int db_mutexlocks; /* DB_MUTEXLOCKS */
int db_region_anon; /* DB_REGION_ANON, DB_REGION_NAME */
int db_region_init; /* DB_REGION_INIT */
int db_tsl_spins; /* DB_TSL_SPINS */
int db_pageyield; /* DB_PAGEYIELD */
} DB_GLOBALS;
extern DB_GLOBALS __db_global_values;
#define DB_GLOBAL(v) __db_global_values.v
/* Unused, or not-used-yet variable. "Shut that bloody compiler up!" */
#define COMPQUIET(n, v) (n) = (v)
/*
* Win16 needs specific syntax on callback functions. Nobody else cares.
*/
#ifndef DB_CALLBACK
#define DB_CALLBACK /* Nothing. */
#endif
/*******************************************************
* Files.
*******************************************************/
/*
* We use 1024 as the maximum path length. It's too hard to figure out what
* the real path length is, as it was traditionally stored in <sys/param.h>,
* and that file isn't always available.
*/
#undef MAXPATHLEN
#define MAXPATHLEN 1024
#define PATH_DOT "." /* Current working directory. */
#define PATH_SEPARATOR "/" /* Path separator character. */
/*******************************************************
* Mutex support.
*******************************************************/
@spin_line1@
@spin_line2@
@spin_line3@
/*
* !!!
* Various systems require different alignments for mutexes (the worst we've
* seen so far is 16-bytes on some HP architectures). The mutex (tsl_t) must
* be first in the db_mutex_t structure, which must itself be first in the
* region. This ensures the alignment is as returned by mmap(2), which should
* be sufficient. All other mutex users must ensure proper alignment locally.
*/
#define MUTEX_ALIGNMENT @mutex_align@
/*
* The offset of a mutex in memory.
*
* !!!
* Not an off_t, so backing file offsets MUST be less than 4Gb. See the
* off field of the db_mutex_t as well.
*/
#define MUTEX_LOCK_OFFSET(a, b) ((u_int32_t)((u_int8_t *)b - (u_int8_t *)a))
typedef struct _db_mutex_t {
#ifdef HAVE_SPINLOCKS
tsl_t tsl_resource; /* Resource test and set. */
#ifdef DIAGNOSTIC
u_int32_t pid; /* Lock holder: 0 or process pid. */
#endif
#else
u_int32_t off; /* Backing file offset. */
u_int32_t pid; /* Lock holder: 0 or process pid. */
#endif
u_int32_t spins; /* Spins before block. */
u_int32_t mutex_set_wait; /* Granted after wait. */
u_int32_t mutex_set_nowait; /* Granted without waiting. */
} db_mutex_t;
#include "mutex_ext.h"
/*******************************************************
* Access methods.
*******************************************************/
/* Lock/unlock a DB thread. */
#define DB_THREAD_LOCK(dbp) \
if (F_ISSET(dbp, DB_AM_THREAD)) \
(void)__db_mutex_lock((db_mutex_t *)(dbp)->mutexp, -1);
#define DB_THREAD_UNLOCK(dbp) \
if (F_ISSET(dbp, DB_AM_THREAD)) \
(void)__db_mutex_unlock((db_mutex_t *)(dbp)->mutexp, -1);
/* Btree/recno local statistics structure. */
struct __db_bt_lstat; typedef struct __db_bt_lstat DB_BTREE_LSTAT;
struct __db_bt_lstat {
u_int32_t bt_freed; /* Pages freed for reuse. */
u_int32_t bt_pfxsaved; /* Bytes saved by prefix compression. */
u_int32_t bt_split; /* Total number of splits. */
u_int32_t bt_rootsplit; /* Root page splits. */
u_int32_t bt_fastsplit; /* Fast splits. */
u_int32_t bt_added; /* Items added. */
u_int32_t bt_deleted; /* Items deleted. */
u_int32_t bt_get; /* Items retrieved. */
u_int32_t bt_cache_hit; /* Hits in fast-insert code. */
u_int32_t bt_cache_miss; /* Misses in fast-insert code. */
};
/*******************************************************
* Environment.
*******************************************************/
/* Type passed to __db_appname(). */
typedef enum {
DB_APP_NONE=0, /* No type (region). */
DB_APP_DATA, /* Data file. */
DB_APP_LOG, /* Log file. */
DB_APP_TMP /* Temporary file. */
} APPNAME;
/*******************************************************
* Shared memory regions.
*******************************************************/
/*
* The shared memory regions share an initial structure so that the general
* region code can handle races between the region being deleted and other
* processes waiting on the region mutex.
*
* !!!
* Note, the mutex must be the first entry in the region; see comment above.
*/
typedef struct _rlayout {
db_mutex_t lock; /* Region mutex. */
#define DB_REGIONMAGIC 0x120897
u_int32_t valid; /* Valid magic number. */
u_int32_t refcnt; /* Region reference count. */
size_t size; /* Region length. */
int majver; /* Major version number. */
int minver; /* Minor version number. */
int patch; /* Patch version number. */
#define INVALID_SEGID -1
int segid; /* shmget(2) ID, or Win16 segment ID. */
#define REGION_ANONYMOUS 0x01 /* Region is/should be in anon mem. */
u_int32_t flags;
} RLAYOUT;
/*
* DB creates all regions on 4K boundaries out of sheer paranoia, so that
* we don't make the underlying VM unhappy.
*/
#define DB_VMPAGESIZE (4 * 1024)
#define DB_ROUNDOFF(i) { \
(i) += DB_VMPAGESIZE - 1; \
(i) -= (i) % DB_VMPAGESIZE; \
}
/*
* The interface to region attach is nasty, there is a lot of complex stuff
* going on, which has to be retained between create/attach and detach. The
* REGINFO structure keeps track of it.
*/
struct __db_reginfo; typedef struct __db_reginfo REGINFO;
struct __db_reginfo {
/* Arguments. */
DB_ENV *dbenv; /* Region naming info. */
APPNAME appname; /* Region naming info. */
char *path; /* Region naming info. */
const char *file; /* Region naming info. */
int mode; /* Region mode, if a file. */
size_t size; /* Region size. */
u_int32_t dbflags; /* Region file open flags, if a file. */
/* Results. */
char *name; /* Region name. */
void *addr; /* Region address. */
int fd; /* Fcntl(2) locking file descriptor.
NB: this is only valid if a regular
file is backing the shared region,
and mmap(2) is being used to map it
into our address space. */
int segid; /* shmget(2) ID, or Win16 segment ID. */
/* Shared flags. */
/* 0x0001 COMMON MASK with RLAYOUT structure. */
#define REGION_CANGROW 0x0002 /* Can grow. */
#define REGION_CREATED 0x0004 /* Created. */
#define REGION_HOLDINGSYS 0x0008 /* Holding system resources. */
#define REGION_LASTDETACH 0x0010 /* Delete on last detach. */
#define REGION_MALLOC 0x0020 /* Created in malloc'd memory. */
#define REGION_PRIVATE 0x0040 /* Private to thread/process. */
#define REGION_REMOVED 0x0080 /* Already deleted. */
#define REGION_SIZEDEF 0x0100 /* Use default region size if exists. */
u_int32_t flags;
};
/*******************************************************
* Mpool.
*******************************************************/
/*
* File types for DB access methods. Negative numbers are reserved to DB.
*/
#define DB_FTYPE_BTREE -1 /* Btree. */
#define DB_FTYPE_HASH -2 /* Hash. */
/* Structure used as the DB pgin/pgout pgcookie. */
typedef struct __dbpginfo {
size_t db_pagesize; /* Underlying page size. */
int needswap; /* If swapping required. */
} DB_PGINFO;
/*******************************************************
* Log.
*******************************************************/
/* Initialize an LSN to 'zero'. */
#define ZERO_LSN(LSN) { \
(LSN).file = 0; \
(LSN).offset = 0; \
}
/* Return 1 if LSN is a 'zero' lsn, otherwise return 0. */
#define IS_ZERO_LSN(LSN) ((LSN).file == 0)
/* Test if we need to log a change. */
#define DB_LOGGING(dbp) \
(F_ISSET(dbp, DB_AM_LOGGING) && !F_ISSET(dbp, DB_AM_RECOVER))
#ifdef DIAGNOSTIC
/*
* Debugging macro to log operations.
* If DEBUG_WOP is defined, log operations that modify the database.
* If DEBUG_ROP is defined, log operations that read the database.
*
* D dbp
* T txn
* O operation (string)
* K key
* A data
* F flags
*/
#define LOG_OP(D, T, O, K, A, F) { \
DB_LSN _lsn; \
DBT _op; \
if (DB_LOGGING((D))) { \
memset(&_op, 0, sizeof(_op)); \
_op.data = O; \
_op.size = strlen(O) + 1; \
(void)__db_debug_log((D)->dbenv->lg_info, \
T, &_lsn, 0, &_op, (D)->log_fileid, K, A, F); \
} \
}
#ifdef DEBUG_ROP
#define DEBUG_LREAD(D, T, O, K, A, F) LOG_OP(D, T, O, K, A, F)
#else
#define DEBUG_LREAD(D, T, O, K, A, F)
#endif
#ifdef DEBUG_WOP
#define DEBUG_LWRITE(D, T, O, K, A, F) LOG_OP(D, T, O, K, A, F)
#else
#define DEBUG_LWRITE(D, T, O, K, A, F)
#endif
#else
#define DEBUG_LREAD(D, T, O, K, A, F)
#define DEBUG_LWRITE(D, T, O, K, A, F)
#endif /* DIAGNOSTIC */
/*******************************************************
* Transactions and recovery.
*******************************************************/
/*
* Out of band value for a lock. The locks are returned to callers as offsets
* into the lock regions. Since the RLAYOUT structure begins all regions, an
* offset of 0 is guaranteed not to be a valid lock.
*/
#define LOCK_INVALID 0
/* The structure allocated for every transaction. */
struct __db_txn {
DB_TXNMGR *mgrp; /* Pointer to transaction manager. */
DB_TXN *parent; /* Pointer to transaction's parent. */
DB_LSN last_lsn; /* Lsn of last log write. */
u_int32_t txnid; /* Unique transaction id. */
size_t off; /* Detail structure within region. */
TAILQ_ENTRY(__db_txn) links;
};
#include "os_func.h"
#include "os_ext.h"
#endif /* !_DB_INTERNAL_H_ */