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8f590873d04342c63e95c00b47d78537907a5e1f
cpython-source-deps/build_brew/db_int.h
Zachary Ware 8f590873d0 Import BSDDB 4.7.25 (as of svn r89086)
2017-09-04 13:40:25 -05:00

915 lines
29 KiB
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/* DO NOT EDIT: automatically built by dist/s_brew. */
/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996,2008 Oracle. All rights reserved.
*
* $Id: db_int.h 63573 2008-05-23 21:43:21Z trent.nelson $
*/
#ifndef _DB_INT_H_
#define _DB_INT_H_
/*******************************************************
* Berkeley DB ANSI/POSIX include files.
*******************************************************/
#ifdef HAVE_SYSTEM_INCLUDE_FILES
#include <sys/types.h>
#ifdef DIAG_MVCC
#include <sys/mman.h>
#endif
#include <sys/stat.h>
#if defined(__INCLUDE_SELECT_H)
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_VXWORKS
#include <selectLib.h>
#endif
#endif
#if TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif
#ifdef HAVE_VXWORKS
#include <net/uio.h>
#else
#include <sys/uio.h>
#endif
#if defined(__INCLUDE_NETWORKING)
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#endif
#if defined(STDC_HEADERS) || defined(__cplusplus)
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if defined(__INCLUDE_DIRECTORY)
#if HAVE_DIRENT_H
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#else
# define dirent direct
# define NAMLEN(dirent) (dirent)->d_namlen
# if HAVE_SYS_NDIR_H
# include <sys/ndir.h>
# endif
# if HAVE_SYS_DIR_H
# include <sys/dir.h>
# endif
# if HAVE_NDIR_H
# include <ndir.h>
# endif
#endif
#endif /* __INCLUDE_DIRECTORY */
#endif /* !HAVE_SYSTEM_INCLUDE_FILES */
#include "brew_db.h"
#ifdef DB_WIN32
#include "dbinc/win_db.h"
#endif
#include "db.h"
#include "clib_port.h"
#include "dbinc/queue.h"
#include "dbinc/shqueue.h"
#if defined(__cplusplus)
extern "C" {
#endif
/*******************************************************
* Forward structure declarations.
*******************************************************/
struct __db_reginfo_t; typedef struct __db_reginfo_t REGINFO;
struct __db_txnhead; typedef struct __db_txnhead DB_TXNHEAD;
struct __db_txnlist; typedef struct __db_txnlist DB_TXNLIST;
struct __vrfy_childinfo;typedef struct __vrfy_childinfo VRFY_CHILDINFO;
struct __vrfy_dbinfo; typedef struct __vrfy_dbinfo VRFY_DBINFO;
struct __vrfy_pageinfo; typedef struct __vrfy_pageinfo VRFY_PAGEINFO;
typedef SH_TAILQ_HEAD(__hash_head) DB_HASHTAB;
/*******************************************************
* General purpose constants and macros.
*******************************************************/
#undef FALSE
#define FALSE 0
#undef TRUE
#define TRUE (!FALSE)
#define MEGABYTE 1048576
#define GIGABYTE 1073741824
#define NS_PER_MS 1000000 /* Nanoseconds in a millisecond */
#define NS_PER_US 1000 /* Nanoseconds in a microsecond */
#define NS_PER_SEC 1000000000 /* Nanoseconds in a second */
#define US_PER_MS 1000 /* Microseconds in a millisecond */
#define US_PER_SEC 1000000 /* Microseconds in a second */
#define MS_PER_SEC 1000 /* Milliseconds in a second */
#define RECNO_OOB 0 /* Illegal record number. */
/* Test for a power-of-two (tests true for zero, which doesn't matter here). */
#define POWER_OF_TWO(x) (((x) & ((x) - 1)) == 0)
/* Test for valid page sizes. */
#define DB_MIN_PGSIZE 0x000200 /* Minimum page size (512). */
#define DB_MAX_PGSIZE 0x010000 /* Maximum page size (65536). */
#define IS_VALID_PAGESIZE(x) \
(POWER_OF_TWO(x) && (x) >= DB_MIN_PGSIZE && ((x) <= DB_MAX_PGSIZE))
/* Minimum number of pages cached, by default. */
#define DB_MINPAGECACHE 16
/*
* If we are unable to determine the underlying filesystem block size, use
* 8K on the grounds that most OS's use less than 8K for a VM page size.
*/
#define DB_DEF_IOSIZE (8 * 1024)
/* Align an integer to a specific boundary. */
#undef DB_ALIGN
#define DB_ALIGN(v, bound) \
(((v) + (bound) - 1) & ~(((uintmax_t)(bound)) - 1))
/* Increment a pointer to a specific boundary. */
#undef ALIGNP_INC
#define ALIGNP_INC(p, bound) \
(void *)(((uintptr_t)(p) + (bound) - 1) & ~(((uintptr_t)(bound)) - 1))
/*
* Print an address as a u_long (a u_long is the largest type we can print
* portably). Most 64-bit systems have made longs 64-bits, so this should
* work.
*/
#define P_TO_ULONG(p) ((u_long)(uintptr_t)(p))
/*
* Convert a pointer to a small integral value.
*
* The (u_int16_t)(uintptr_t) cast avoids warnings: the (uintptr_t) cast
* converts the value to an integral type, and the (u_int16_t) cast converts
* it to a small integral type so we don't get complaints when we assign the
* final result to an integral type smaller than uintptr_t.
*/
#define P_TO_UINT32(p) ((u_int32_t)(uintptr_t)(p))
#define P_TO_UINT16(p) ((u_int16_t)(uintptr_t)(p))
/*
* 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) P_TO_UINT16(&(((name *)0)->field))
#undef SSZA
#define SSZA(name, field) P_TO_UINT16(&(((name *)0)->field[0]))
/* 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 FLD_CLR(fld, f) (fld) &= ~(f)
#define FLD_ISSET(fld, f) ((fld) & (f))
#define FLD_SET(fld, f) (fld) |= (f)
#define F_CLR(p, f) (p)->flags &= ~(f)
#define F_ISSET(p, f) ((p)->flags & (f))
#define F_SET(p, f) (p)->flags |= (f)
#define LF_CLR(f) ((flags) &= ~(f))
#define LF_ISSET(f) ((flags) & (f))
#define LF_SET(f) ((flags) |= (f))
/*
* Calculate a percentage. The values can overflow 32-bit integer arithmetic
* so we use floating point.
*
* When calculating a bytes-vs-page size percentage, we're getting the inverse
* of the percentage in all cases, that is, we want 100 minus the percentage we
* calculate.
*/
#define DB_PCT(v, total) \
((int)((total) == 0 ? 0 : ((double)(v) * 100) / (total)))
#define DB_PCT_PG(v, total, pgsize) \
((int)((total) == 0 ? 0 : \
100 - ((double)(v) * 100) / (((double)total) * (pgsize))))
/*
* Statistics update shared memory and so are expensive -- don't update the
* values unless we're going to display the results.
*/
#undef STAT
#ifdef HAVE_STATISTICS
#define STAT(x) x
#else
#define STAT(x)
#endif
/*
* Structure used for callback message aggregation.
*
* Display values in XXX_stat_print calls.
*/
typedef struct __db_msgbuf {
char *buf; /* Heap allocated buffer. */
char *cur; /* Current end of message. */
size_t len; /* Allocated length of buffer. */
} DB_MSGBUF;
#define DB_MSGBUF_INIT(a) do { \
(a)->buf = (a)->cur = NULL; \
(a)->len = 0; \
} while (0)
#define DB_MSGBUF_FLUSH(env, a) do { \
if ((a)->buf != NULL) { \
if ((a)->cur != (a)->buf) \
__db_msg(env, "%s", (a)->buf); \
__os_free(env, (a)->buf); \
DB_MSGBUF_INIT(a); \
} \
} while (0)
#define STAT_FMT(msg, fmt, type, v) do { \
DB_MSGBUF __mb; \
DB_MSGBUF_INIT(&__mb); \
__db_msgadd(env, &__mb, fmt, (type)(v)); \
__db_msgadd(env, &__mb, "\t%s", msg); \
DB_MSGBUF_FLUSH(env, &__mb); \
} while (0)
#define STAT_HEX(msg, v) \
__db_msg(env, "%#lx\t%s", (u_long)(v), msg)
#define STAT_ISSET(msg, p) \
__db_msg(env, "%sSet\t%s", (p) == NULL ? "!" : " ", msg)
#define STAT_LONG(msg, v) \
__db_msg(env, "%ld\t%s", (long)(v), msg)
#define STAT_LSN(msg, lsnp) \
__db_msg(env, "%lu/%lu\t%s", \
(u_long)(lsnp)->file, (u_long)(lsnp)->offset, msg)
#define STAT_POINTER(msg, v) \
__db_msg(env, "%#lx\t%s", P_TO_ULONG(v), msg)
#define STAT_STRING(msg, p) do { \
const char *__p = p; /* p may be a function call. */ \
__db_msg(env, "%s\t%s", __p == NULL ? "!Set" : __p, msg); \
} while (0)
#define STAT_ULONG(msg, v) \
__db_msg(env, "%lu\t%s", (u_long)(v), msg)
/*
* There are quite a few places in Berkeley DB where we want to initialize
* a DBT from a string or other random pointer type, using a length typed
* to size_t in most cases. This macro avoids a lot of casting. The macro
* comes in two flavors because we often want to clear the DBT first.
*/
#define DB_SET_DBT(dbt, d, s) do { \
(dbt).data = (void *)(d); \
(dbt).size = (u_int32_t)(s); \
} while (0)
#define DB_INIT_DBT(dbt, d, s) do { \
memset(&(dbt), 0, sizeof(dbt)); \
DB_SET_DBT(dbt, d, s); \
} while (0)
/*******************************************************
* API return values
*******************************************************/
/*
* Return values that are OK for each different call. Most calls have a
* standard 'return of 0 is only OK value', but some, like db->get have
* DB_NOTFOUND as a return value, but it really isn't an error.
*/
#define DB_RETOK_STD(ret) ((ret) == 0)
#define DB_RETOK_DBCDEL(ret) ((ret) == 0 || (ret) == DB_KEYEMPTY || \
(ret) == DB_NOTFOUND)
#define DB_RETOK_DBCGET(ret) ((ret) == 0 || (ret) == DB_KEYEMPTY || \
(ret) == DB_NOTFOUND)
#define DB_RETOK_DBCPUT(ret) ((ret) == 0 || (ret) == DB_KEYEXIST || \
(ret) == DB_NOTFOUND)
#define DB_RETOK_DBDEL(ret) DB_RETOK_DBCDEL(ret)
#define DB_RETOK_DBGET(ret) DB_RETOK_DBCGET(ret)
#define DB_RETOK_DBPUT(ret) ((ret) == 0 || (ret) == DB_KEYEXIST)
#define DB_RETOK_EXISTS(ret) DB_RETOK_DBCGET(ret)
#define DB_RETOK_LGGET(ret) ((ret) == 0 || (ret) == DB_NOTFOUND)
#define DB_RETOK_MPGET(ret) ((ret) == 0 || (ret) == DB_PAGE_NOTFOUND)
#define DB_RETOK_REPPMSG(ret) ((ret) == 0 || \
(ret) == DB_REP_IGNORE || \
(ret) == DB_REP_ISPERM || \
(ret) == DB_REP_NEWMASTER || \
(ret) == DB_REP_NEWSITE || \
(ret) == DB_REP_NOTPERM)
/* Find a reasonable operation-not-supported error. */
#ifdef EOPNOTSUPP
#define DB_OPNOTSUP EOPNOTSUPP
#else
#ifdef ENOTSUP
#define DB_OPNOTSUP ENOTSUP
#else
#define DB_OPNOTSUP EINVAL
#endif
#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.
*/
#define DB_MAXPATHLEN 1024
#define PATH_DOT "." /* Current working directory. */
/* Path separator character(s). */
#define PATH_SEPARATOR "\\/:"
/*******************************************************
* 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;
/*
* A set of macros to check if various functionality has been configured.
*
* ALIVE_ON The is_alive function is configured.
* CDB_LOCKING CDB product locking.
* CRYPTO_ON Security has been configured.
* LOCKING_ON Locking has been configured.
* LOGGING_ON Logging has been configured.
* MUTEX_ON Mutexes have been configured.
* MPOOL_ON Memory pool has been configured.
* REP_ON Replication has been configured.
* RPC_ON RPC has been configured.
* TXN_ON Transactions have been configured.
*
* REP_ON is more complex than most: if the BDB library was compiled without
* replication support, ENV->rep_handle will be NULL; if the BDB library has
* replication support, but it was not configured, the region reference will
* be NULL.
*/
#define ALIVE_ON(env) ((env)->dbenv->is_alive != NULL)
#define CDB_LOCKING(env) F_ISSET(env, ENV_CDB)
#define CRYPTO_ON(env) ((env)->crypto_handle != NULL)
#define LOCKING_ON(env) ((env)->lk_handle != NULL)
#define LOGGING_ON(env) ((env)->lg_handle != NULL)
#define MPOOL_ON(env) ((env)->mp_handle != NULL)
#define MUTEX_ON(env) ((env)->mutex_handle != NULL)
#define REP_ON(env) \
((env)->rep_handle != NULL && (env)->rep_handle->region != NULL)
#define RPC_ON(dbenv) ((dbenv)->cl_handle != NULL)
#define TXN_ON(env) ((env)->tx_handle != NULL)
/*
* STD_LOCKING Standard locking, that is, locking was configured and CDB
* was not. We do not do locking in off-page duplicate trees,
* so we check for that in the cursor first.
*/
#define STD_LOCKING(dbc) \
(!F_ISSET(dbc, DBC_OPD) && \
!CDB_LOCKING((dbc)->env) && LOCKING_ON((dbc)->env))
/*
* IS_RECOVERING: The system is running recovery.
*/
#define IS_RECOVERING(env) \
(LOGGING_ON(env) && F_ISSET((env)->lg_handle, DBLOG_RECOVER))
/* Initialization methods are often illegal before/after open is called. */
#define ENV_ILLEGAL_AFTER_OPEN(env, name) \
if (F_ISSET((env), ENV_OPEN_CALLED)) \
return (__db_mi_open(env, name, 1));
#define ENV_ILLEGAL_BEFORE_OPEN(env, name) \
if (!F_ISSET((env), ENV_OPEN_CALLED)) \
return (__db_mi_open(env, name, 0));
/* We're not actually user hostile, honest. */
#define ENV_REQUIRES_CONFIG(env, handle, i, flags) \
if (handle == NULL) \
return (__env_not_config(env, i, flags));
#define ENV_REQUIRES_CONFIG_XX(env, handle, i, flags) \
if ((env)->handle->region == NULL) \
return (__env_not_config(env, i, flags));
#define ENV_NOT_CONFIGURED(env, handle, i, flags) \
if (F_ISSET((env), ENV_OPEN_CALLED)) \
ENV_REQUIRES_CONFIG(env, handle, i, flags)
#define ENV_ENTER(env, ip) do { \
int __ret; \
PANIC_CHECK(env); \
if ((env)->thr_hashtab == NULL) \
ip = NULL; \
else { \
if ((__ret = \
__env_set_state(env, &(ip), THREAD_ACTIVE)) != 0) \
return (__ret); \
} \
} while (0)
#define ENV_GET_THREAD_INFO(env, ip) ENV_ENTER(env, ip)
#ifdef DIAGNOSTIC
#define ENV_LEAVE(env, ip) do { \
if ((ip) != NULL) { \
DB_ASSERT(env, (ip)->dbth_state == THREAD_ACTIVE); \
(ip)->dbth_state = THREAD_OUT; \
} \
} while (0)
#else
#define ENV_LEAVE(env, ip) do { \
if ((ip) != NULL) \
(ip)->dbth_state = THREAD_OUT; \
} while (0)
#endif
#ifdef DIAGNOSTIC
#define CHECK_THREAD(env) do { \
if ((env)->thr_hashtab != NULL) \
(void)__env_set_state(env, NULL, THREAD_VERIFY); \
} while (0)
#ifdef HAVE_STATISTICS
#define CHECK_MTX_THREAD(env, mtx) do { \
if (mtx->alloc_id != MTX_MUTEX_REGION && \
mtx->alloc_id != MTX_ENV_REGION && \
mtx->alloc_id != MTX_APPLICATION) \
CHECK_THREAD(env); \
} while (0)
#else
#define CHECK_MTX_THREAD(env, mtx)
#endif
#else
#define CHECK_THREAD(env)
#define CHECK_MTX_THREAD(env, mtx)
#endif
typedef enum {
THREAD_SLOT_NOT_IN_USE=0,
THREAD_OUT,
THREAD_ACTIVE,
THREAD_BLOCKED,
THREAD_BLOCKED_DEAD
#ifdef DIAGNOSTIC
, THREAD_VERIFY
#endif
} DB_THREAD_STATE;
typedef struct __pin_list {
roff_t b_ref; /* offset to buffer. */
int region; /* region containing buffer. */
} PIN_LIST;
#define PINMAX 4
struct __db_thread_info {
pid_t dbth_pid;
db_threadid_t dbth_tid;
DB_THREAD_STATE dbth_state;
SH_TAILQ_ENTRY dbth_links;
/*
* The following fields track which buffers this thread of
* control has pinned in the mpool buffer cache.
*/
u_int16_t dbth_pincount; /* Number of pins for this thread. */
u_int16_t dbth_pinmax; /* Number of slots allocated. */
roff_t dbth_pinlist; /* List of pins. */
PIN_LIST dbth_pinarray[PINMAX]; /* Initial array of slots. */
};
typedef struct __env_thread_info {
u_int32_t thr_count;
u_int32_t thr_max;
u_int32_t thr_nbucket;
roff_t thr_hashoff;
} THREAD_INFO;
#define DB_EVENT(env, e, einfo) do { \
DB_ENV *__dbenv = (env)->dbenv; \
if (__dbenv->db_event_func != NULL) \
__dbenv->db_event_func(__dbenv, e, einfo); \
} while (0)
typedef struct __flag_map {
u_int32_t inflag, outflag;
} FLAG_MAP;
/*
* Internal database environment structure.
*
* This is the private database environment handle. The public environment
* handle is the DB_ENV structure. The library owns this structure, the user
* owns the DB_ENV structure. The reason there are two structures is because
* the user's configuration outlives any particular DB_ENV->open call, and
* separate structures allows us to easily discard internal information without
* discarding the user's configuration.
*/
struct __env {
DB_ENV *dbenv; /* Linked DB_ENV structure */
/*
* The ENV structure can be used concurrently, so field access is
* protected.
*/
db_mutex_t mtx_env; /* ENV structure mutex */
/*
* Some fields are included in the ENV structure rather than in the
* DB_ENV structure because they are only set as arguments to the
* DB_ENV->open method. In other words, because of the historic API,
* not for any rational reason.
*
* Arguments to DB_ENV->open.
*/
char *db_home; /* Database home */
u_int32_t open_flags; /* Flags */
int db_mode; /* Default open permissions */
pid_t pid_cache; /* Cached process ID */
DB_FH *lockfhp; /* fcntl(2) locking file handle */
DB_LOCKER *env_lref; /* Locker in non-threaded handles */
DB_DISTAB recover_dtab; /* Dispatch table for recover funcs */
int dir_mode; /* Intermediate directory perms. */
/* Thread tracking */
u_int32_t thr_nbucket; /* Number of hash buckets */
DB_HASHTAB *thr_hashtab; /* Hash table of DB_THREAD_INFO */
/* Mutex allocation */
struct {
int alloc_id; /* Allocation ID argument */
u_int32_t flags; /* Flags argument */
} *mutex_iq; /* Initial mutexes queue */
u_int mutex_iq_next; /* Count of initial mutexes */
u_int mutex_iq_max; /* Maximum initial mutexes */
/*
* List of open DB handles for this ENV, used for cursor
* adjustment. Must be protected for multi-threaded support.
*/
db_mutex_t mtx_dblist;
int db_ref; /* DB handle reference count */
TAILQ_HEAD(__dblist, __db) dblist;
/*
* XA support.
*/
int xa_rmid; /* XA Resource Manager ID */
TAILQ_ENTRY(__env) links; /* XA environments */
TAILQ_HEAD(__xa_txn, __db_txn) xa_txn; /* XA active transactions */
/*
* List of open file handles for this ENV. Must be protected
* for multi-threaded support.
*/
TAILQ_HEAD(__fdlist, __fh_t) fdlist;
db_mutex_t mtx_mt; /* Mersenne Twister mutex */
int mti; /* Mersenne Twister index */
u_long *mt; /* Mersenne Twister state vector */
DB_CIPHER *crypto_handle; /* Crypto handle */
DB_LOCKTAB *lk_handle; /* Lock handle */
DB_LOG *lg_handle; /* Log handle */
DB_MPOOL *mp_handle; /* Mpool handle */
DB_MUTEXMGR *mutex_handle; /* Mutex handle */
DB_REP *rep_handle; /* Replication handle */
DB_TXNMGR *tx_handle; /* Txn handle */
/* Application callback to copy data to/from a custom data source */
#define DB_USERCOPY_GETDATA 0x0001
#define DB_USERCOPY_SETDATA 0x0002
int (*dbt_usercopy)
__P((DBT *, u_int32_t, void *, u_int32_t, u_int32_t));
REGINFO *reginfo; /* REGINFO structure reference */
#define DB_TEST_ELECTINIT 1 /* after __rep_elect_init */
#define DB_TEST_ELECTVOTE1 2 /* after sending VOTE1 */
#define DB_TEST_POSTDESTROY 3 /* after destroy op */
#define DB_TEST_POSTLOG 4 /* after logging all pages */
#define DB_TEST_POSTLOGMETA 5 /* after logging meta in btree */
#define DB_TEST_POSTOPEN 6 /* after __os_open */
#define DB_TEST_POSTSYNC 7 /* after syncing the log */
#define DB_TEST_PREDESTROY 8 /* before destroy op */
#define DB_TEST_PREOPEN 9 /* before __os_open */
#define DB_TEST_SUBDB_LOCKS 10 /* subdb locking tests */
int test_abort; /* Abort value for testing */
int test_check; /* Checkpoint value for testing */
int test_copy; /* Copy value for testing */
#define ENV_CDB 0x00000001 /* DB_INIT_CDB */
#define ENV_DBLOCAL 0x00000002 /* Environment for a private DB */
#define ENV_LITTLEENDIAN 0x00000004 /* Little endian system. */
#define ENV_LOCKDOWN 0x00000008 /* DB_LOCKDOWN set */
#define ENV_NO_OUTPUT_SET 0x00000010 /* No output channel set */
#define ENV_OPEN_CALLED 0x00000020 /* DB_ENV->open called */
#define ENV_PRIVATE 0x00000040 /* DB_PRIVATE set */
#define ENV_RECOVER_FATAL 0x00000080 /* Doing fatal recovery in env */
#define ENV_REF_COUNTED 0x00000100 /* Region references this handle */
#define ENV_SYSTEM_MEM 0x00000200 /* DB_SYSTEM_MEM set */
#define ENV_THREAD 0x00000400 /* DB_THREAD set */
u_int32_t flags;
};
/*******************************************************
* Database Access Methods.
*******************************************************/
/*
* DB_IS_THREADED --
* The database handle is free-threaded (was opened with DB_THREAD).
*/
#define DB_IS_THREADED(dbp) \
((dbp)->mutex != MUTEX_INVALID)
/* Initialization methods are often illegal before/after open is called. */
#define DB_ILLEGAL_AFTER_OPEN(dbp, name) \
if (F_ISSET((dbp), DB_AM_OPEN_CALLED)) \
return (__db_mi_open((dbp)->env, name, 1));
#define DB_ILLEGAL_BEFORE_OPEN(dbp, name) \
if (!F_ISSET((dbp), DB_AM_OPEN_CALLED)) \
return (__db_mi_open((dbp)->env, name, 0));
/* Some initialization methods are illegal if environment isn't local. */
#define DB_ILLEGAL_IN_ENV(dbp, name) \
if (!F_ISSET((dbp)->env, ENV_DBLOCAL)) \
return (__db_mi_env((dbp)->env, name));
#define DB_ILLEGAL_METHOD(dbp, flags) { \
int __ret; \
if ((__ret = __dbh_am_chk(dbp, flags)) != 0) \
return (__ret); \
}
/*
* Common DBC->internal fields. Each access method adds additional fields
* to this list, but the initial fields are common.
*/
#define __DBC_INTERNAL \
DBC *opd; /* Off-page duplicate cursor. */\
\
void *page; /* Referenced page. */ \
db_pgno_t root; /* Tree root. */ \
db_pgno_t pgno; /* Referenced page number. */ \
db_indx_t indx; /* Referenced key item index. */\
\
DB_LOCK lock; /* Cursor lock. */ \
db_lockmode_t lock_mode; /* Lock mode. */
struct __dbc_internal {
__DBC_INTERNAL
};
/* Actions that __db_master_update can take. */
typedef enum { MU_REMOVE, MU_RENAME, MU_OPEN } mu_action;
/*
* Access-method-common macro for determining whether a cursor
* has been initialized.
*/
#define IS_INITIALIZED(dbc) ((dbc)->internal->pgno != PGNO_INVALID)
/* Free the callback-allocated buffer, if necessary, hanging off of a DBT. */
#define FREE_IF_NEEDED(env, dbt) \
if (F_ISSET((dbt), DB_DBT_APPMALLOC)) { \
__os_ufree((env), (dbt)->data); \
F_CLR((dbt), DB_DBT_APPMALLOC); \
}
/*
* Use memory belonging to object "owner" to return the results of
* any no-DBT-flag get ops on cursor "dbc".
*/
#define SET_RET_MEM(dbc, owner) \
do { \
(dbc)->rskey = &(owner)->my_rskey; \
(dbc)->rkey = &(owner)->my_rkey; \
(dbc)->rdata = &(owner)->my_rdata; \
} while (0)
/* Use the return-data memory src is currently set to use in dest as well. */
#define COPY_RET_MEM(src, dest) \
do { \
(dest)->rskey = (src)->rskey; \
(dest)->rkey = (src)->rkey; \
(dest)->rdata = (src)->rdata; \
} while (0)
/* Reset the returned-memory pointers to their defaults. */
#define RESET_RET_MEM(dbc) \
do { \
(dbc)->rskey = &(dbc)->my_rskey; \
(dbc)->rkey = &(dbc)->my_rkey; \
(dbc)->rdata = &(dbc)->my_rdata; \
} while (0)
/*******************************************************
* Mpool.
*******************************************************/
/*
* File types for DB access methods. Negative numbers are reserved to DB.
*/
#define DB_FTYPE_SET -1 /* Call pgin/pgout functions. */
#define DB_FTYPE_NOTSET 0 /* Don't call... */
#define DB_LSN_OFF_NOTSET -1 /* Not yet set. */
#define DB_CLEARLEN_NOTSET UINT32_MAX /* Not yet set. */
/* Structure used as the DB pgin/pgout pgcookie. */
typedef struct __dbpginfo {
size_t db_pagesize; /* Underlying page size. */
u_int32_t flags; /* Some DB_AM flags needed. */
DBTYPE type; /* DB type */
} DB_PGINFO;
/*******************************************************
* Log.
*******************************************************/
/* Initialize an LSN to 'zero'. */
#define ZERO_LSN(LSN) do { \
(LSN).file = 0; \
(LSN).offset = 0; \
} while (0)
#define IS_ZERO_LSN(LSN) ((LSN).file == 0 && (LSN).offset == 0)
#define IS_INIT_LSN(LSN) ((LSN).file == 1 && (LSN).offset == 0)
#define INIT_LSN(LSN) do { \
(LSN).file = 1; \
(LSN).offset = 0; \
} while (0)
#define MAX_LSN(LSN) do { \
(LSN).file = UINT32_MAX; \
(LSN).offset = UINT32_MAX; \
} while (0)
#define IS_MAX_LSN(LSN) \
((LSN).file == UINT32_MAX && (LSN).offset == UINT32_MAX)
/* If logging is turned off, smash the lsn. */
#define LSN_NOT_LOGGED(LSN) do { \
(LSN).file = 0; \
(LSN).offset = 1; \
} while (0)
#define IS_NOT_LOGGED_LSN(LSN) \
((LSN).file == 0 && (LSN).offset == 1)
/*
* LOG_COMPARE -- compare two LSNs.
*/
#define LOG_COMPARE(lsn0, lsn1) \
((lsn0)->file != (lsn1)->file ? \
((lsn0)->file < (lsn1)->file ? -1 : 1) : \
((lsn0)->offset != (lsn1)->offset ? \
((lsn0)->offset < (lsn1)->offset ? -1 : 1) : 0))
/*******************************************************
* Txn.
*******************************************************/
#define DB_NONBLOCK(C) ((C)->txn != NULL && F_ISSET((C)->txn, TXN_NOWAIT))
#define NOWAIT_FLAG(txn) \
((txn) != NULL && F_ISSET((txn), TXN_NOWAIT) ? DB_LOCK_NOWAIT : 0)
#define IS_REAL_TXN(txn) \
((txn) != NULL && !F_ISSET(txn, TXN_CDSGROUP))
#define IS_SUBTRANSACTION(txn) \
((txn) != NULL && (txn)->parent != NULL)
/*******************************************************
* Crypto.
*******************************************************/
#define DB_IV_BYTES 16 /* Bytes per IV */
#define DB_MAC_KEY 20 /* Bytes per MAC checksum */
/*******************************************************
* Secondaries over RPC.
*******************************************************/
#ifdef CONFIG_TEST
/*
* These are flags passed to DB->associate calls by the Tcl API if running
* over RPC. The RPC server will mask out these flags before making the real
* DB->associate call.
*
* These flags must coexist with the valid flags to DB->associate (currently
* DB_AUTO_COMMIT and DB_CREATE). DB_AUTO_COMMIT is in the group of
* high-order shared flags (0xff000000), and DB_CREATE is in the low-order
* group (0x00000fff), so we pick a range in between.
*/
#define DB_RPC2ND_MASK 0x00f00000 /* Reserved bits. */
#define DB_RPC2ND_REVERSEDATA 0x00100000 /* callback_n(0) _s_reversedata. */
#define DB_RPC2ND_NOOP 0x00200000 /* callback_n(1) _s_noop */
#define DB_RPC2ND_CONCATKEYDATA 0x00300000 /* callback_n(2) _s_concatkeydata */
#define DB_RPC2ND_CONCATDATAKEY 0x00400000 /* callback_n(3) _s_concatdatakey */
#define DB_RPC2ND_REVERSECONCAT 0x00500000 /* callback_n(4) _s_reverseconcat */
#define DB_RPC2ND_TRUNCDATA 0x00600000 /* callback_n(5) _s_truncdata */
#define DB_RPC2ND_CONSTANT 0x00700000 /* callback_n(6) _s_constant */
#define DB_RPC2ND_GETZIP 0x00800000 /* sj_getzip */
#define DB_RPC2ND_GETNAME 0x00900000 /* sj_getname */
#endif
#if defined(__cplusplus)
}
#endif
/*******************************************************
* Remaining general DB includes.
*******************************************************/
#include "dbinc/globals.h"
#include "dbinc/clock.h"
#include "dbinc/debug.h"
#include "dbinc/region.h"
#include "dbinc_auto/env_ext.h"
#include "dbinc/mutex.h"
#ifdef HAVE_REPLICATION_THREADS
#include "dbinc/repmgr.h"
#endif
#include "dbinc/rep.h"
#include "dbinc/os.h"
#include "dbinc_auto/clib_ext.h"
#include "dbinc_auto/common_ext.h"
/*******************************************************
* Remaining Log.
* These need to be defined after the general includes
* because they need rep.h from above.
*******************************************************/
/*
* Test if the environment is currently logging changes. If we're in recovery
* or we're a replication client, we don't need to log changes because they're
* already in the log, even though we have a fully functional log system.
*/
#define DBENV_LOGGING(env) \
(LOGGING_ON(env) && !IS_REP_CLIENT(env) && (!IS_RECOVERING(env)))
/*
* Test if we need to log a change. By default, we don't log operations without
* associated transactions, unless DIAGNOSTIC, DEBUG_ROP or DEBUG_WOP are on.
* This is because we want to get log records for read/write operations, and, if
* we are trying to debug something, more information is always better.
*
* The DBC_RECOVER flag is set when we're in abort, as well as during recovery;
* thus DBC_LOGGING may be false for a particular dbc even when DBENV_LOGGING
* is true.
*
* We explicitly use LOGGING_ON/IS_REP_CLIENT here because we don't want to pull
* in the log headers, which IS_RECOVERING (and thus DBENV_LOGGING) rely on, and
* because DBC_RECOVER should be set anytime IS_RECOVERING would be true.
*
* If we're not in recovery (master - doing an abort or a client applying
* a txn), then a client's only path through here is on an internal
* operation, and a master's only path through here is a transactional
* operation. Detect if either is not the case.
*/
#if defined(DIAGNOSTIC) || defined(DEBUG_ROP) || defined(DEBUG_WOP)
#define DBC_LOGGING(dbc) __dbc_logging(dbc)
#else
#define DBC_LOGGING(dbc) \
((dbc)->txn != NULL && LOGGING_ON((dbc)->env) && \
!F_ISSET((dbc), DBC_RECOVER) && !IS_REP_CLIENT((dbc)->env))
#endif
#endif /* !_DB_INT_H_ */
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