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/*-
* Copyright (c) 2014-2019 MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
#define WT_WIREDTIGER "WiredTiger" /* Version file */
#define WT_SINGLETHREAD "WiredTiger.lock" /* Locking file */
#define WT_BASECONFIG "WiredTiger.basecfg" /* Base configuration */
#define WT_BASECONFIG_SET "WiredTiger.basecfg.set"/* Base config temp */
#define WT_USERCONFIG "WiredTiger.config" /* User configuration */
#define WT_BACKUP_TMP "WiredTiger.backup.tmp" /* Backup tmp file */
#define WT_METADATA_BACKUP "WiredTiger.backup" /* Hot backup file */
#define WT_INCREMENTAL_BACKUP "WiredTiger.ibackup" /* Incremental backup */
#define WT_INCREMENTAL_SRC "WiredTiger.isrc" /* Incremental source */
#define WT_METADATA_TURTLE "WiredTiger.turtle" /* Metadata metadata */
#define WT_METADATA_TURTLE_SET "WiredTiger.turtle.set" /* Turtle temp file */
#define WT_METADATA_URI "metadata:" /* Metadata alias */
#define WT_METAFILE "WiredTiger.wt" /* Metadata table */
#define WT_METAFILE_SLVG "WiredTiger.wt.orig" /* Metadata copy */
#define WT_METAFILE_URI "file:WiredTiger.wt" /* Metadata table URI */
#define WT_LAS_FILE "WiredTigerLAS.wt" /* Lookaside table */
#define WT_LAS_URI "file:WiredTigerLAS.wt" /* Lookaside table URI*/
#define WT_SYSTEM_PREFIX "system:" /* System URI prefix */
#define WT_SYSTEM_CKPT_URI "system:checkpoint" /* Checkpoint URI */
/*
* Optimize comparisons against the metafile URI, flag handles that reference
* the metadata file.
*/
#define WT_IS_METADATA(dh) F_ISSET((dh), WT_DHANDLE_IS_METADATA)
#define WT_METAFILE_ID 0 /* Metadata file ID */
#define WT_METADATA_COMPAT "Compatibility version"
#define WT_METADATA_VERSION "WiredTiger version" /* Version keys */
#define WT_METADATA_VERSION_STR "WiredTiger version string"
/*
* WT_WITH_TURTLE_LOCK --
* Acquire the turtle file lock, perform an operation, drop the lock.
*/
#define WT_WITH_TURTLE_LOCK(session, op) do { \
WT_ASSERT(session, !F_ISSET(session, WT_SESSION_LOCKED_TURTLE));\
WT_WITH_LOCK_WAIT(session, \
&S2C(session)->turtle_lock, WT_SESSION_LOCKED_TURTLE, op); \
} while (0)
/*
* WT_CKPT --
* Encapsulation of checkpoint information, shared by the metadata, the
* btree engine, and the block manager.
*/
#define WT_CHECKPOINT "WiredTigerCheckpoint"
#define WT_CKPT_FOREACH(ckptbase, ckpt) \
for ((ckpt) = (ckptbase); (ckpt)->name != NULL; ++(ckpt))
struct __wt_ckpt {
char *name; /* Name or NULL */
/*
* Each internal checkpoint name is appended with a generation
* to make it a unique name. We're solving two problems: when
* two checkpoints are taken quickly, the timer may not be
* unique and/or we can even see time travel on the second
* checkpoint if we snapshot the time in-between nanoseconds
* rolling over. Second, if we reset the generational counter
* when new checkpoints arrive, we could logically re-create
* specific checkpoints, racing with cursors open on those
* checkpoints. I can't think of any way to return incorrect
* results by racing with those cursors, but it's simpler not
* to worry about it.
*/
int64_t order; /* Checkpoint order */
uint64_t sec; /* Wall clock time */
uint64_t size; /* Checkpoint size */
uint64_t write_gen; /* Write generation */
char *block_metadata; /* Block-stored metadata */
char *block_checkpoint; /* Block-stored checkpoint */
/* Validity window */
wt_timestamp_t newest_durable_ts;
wt_timestamp_t oldest_start_ts;
uint64_t oldest_start_txn;
wt_timestamp_t newest_stop_ts;
uint64_t newest_stop_txn;
WT_ITEM addr; /* Checkpoint cookie string */
WT_ITEM raw; /* Checkpoint cookie raw */
void *bpriv; /* Block manager private */
/* AUTOMATIC FLAG VALUE GENERATION START */
#define WT_CKPT_ADD 0x1u /* Checkpoint to be added */
#define WT_CKPT_DELETE 0x2u /* Checkpoint to be deleted */
#define WT_CKPT_FAKE 0x4u /* Checkpoint is a fake */
#define WT_CKPT_UPDATE 0x8u /* Checkpoint requires update */
/* AUTOMATIC FLAG VALUE GENERATION STOP */
uint32_t flags;
};
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