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tcbdb.c
executable file
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tcbdb.c
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/*************************************************************************************************
* The B+ tree database API of Tokyo Cabinet
* Copyright (C) 2006-2011 FAL Labs
* This file is part of Tokyo Cabinet.
* Tokyo Cabinet is free software; you can redistribute it and/or modify it under the terms of
* the GNU Lesser General Public License as published by the Free Software Foundation; either
* version 2.1 of the License or any later version. Tokyo Cabinet is distributed in the hope
* that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
* You should have received a copy of the GNU Lesser General Public License along with Tokyo
* Cabinet; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA.
*************************************************************************************************/
#include "tcutil.h"
#include "tchdb.h"
#include "tcbdb.h"
#include "myconf.h"
#define BDBOPAQUESIZ 64 // size of using opaque field
#define BDBLEFTOPQSIZ 64 // size of left opaque field
#define BDBPAGEBUFSIZ 32768 // size of a buffer to read each page
#define BDBNODEIDBASE ((1LL<<48)+1) // base number of node ID
#define BDBLEVELMAX 64 // max level of B+ tree
#define BDBCACHEOUT 8 // number of pages in a process of cacheout
#define BDBDEFLMEMB 128 // default number of members in each leaf
#define BDBMINLMEMB 4 // minimum number of members in each leaf
#define BDBDEFNMEMB 256 // default number of members in each node
#define BDBMINNMEMB 4 // minimum number of members in each node
#define BDBDEFBNUM 32749 // default bucket number
#define BDBDEFAPOW 8 // default alignment power
#define BDBDEFFPOW 10 // default free block pool power
#define BDBDEFLCNUM 1024 // default number of leaf cache
#define BDBDEFNCNUM 512 // default number of node cache
#define BDBDEFLSMAX 16384 // default maximum size of each leaf
#define BDBMINLSMAX 512 // minimum maximum size of each leaf
typedef struct { // type of structure for a record
int ksiz; // size of the key region
int vsiz; // size of the value region
TCLIST *rest; // list of value objects
} BDBREC;
typedef struct { // type of structure for a leaf page
uint64_t id; // ID number of the leaf
TCPTRLIST *recs; // list of records
int size; // predicted size of serialized buffer
uint64_t prev; // ID number of the previous leaf
uint64_t next; // ID number of the next leaf
bool dirty; // whether to be written back
bool dead; // whether to be removed
} BDBLEAF;
typedef struct { // type of structure for a page index
uint64_t pid; // ID number of the referring page
int ksiz; // size of the key region
} BDBIDX;
typedef struct { // type of structure for a node page
uint64_t id; // ID number of the node
uint64_t heir; // ID of the child before the first index
TCPTRLIST *idxs; // list of indices
bool dirty; // whether to be written back
bool dead; // whether to be removed
} BDBNODE;
enum { // enumeration for duplication behavior
BDBPDOVER, // overwrite an existing value
BDBPDKEEP, // keep the existing value
BDBPDCAT, // concatenate values
BDBPDDUP, // allow duplication of keys
BDBPDDUPB, // allow backward duplication
BDBPDADDINT, // add an integer
BDBPDADDDBL, // add a real number
BDBPDPROC // process by a callback function
};
typedef struct { // type of structure for a duplication callback
TCPDPROC proc; // function pointer
void *op; // opaque pointer
} BDBPDPROCOP;
/* private macros */
#define BDBLOCKMETHOD(TC_bdb, TC_wr) \
((TC_bdb)->mmtx ? tcbdblockmethod((TC_bdb), (TC_wr)) : true)
#define BDBUNLOCKMETHOD(TC_bdb) \
((TC_bdb)->mmtx ? tcbdbunlockmethod(TC_bdb) : true)
#define BDBLOCKCACHE(TC_bdb) \
((TC_bdb)->mmtx ? tcbdblockcache(TC_bdb) : true)
#define BDBUNLOCKCACHE(TC_bdb) \
((TC_bdb)->mmtx ? tcbdbunlockcache(TC_bdb) : true)
#define BDBTHREADYIELD(TC_bdb) \
do { if((TC_bdb)->mmtx) sched_yield(); } while(false)
/* private function prototypes */
static void tcbdbclear(TCBDB *bdb);
static void tcbdbdumpmeta(TCBDB *bdb);
static void tcbdbloadmeta(TCBDB *bdb);
static BDBLEAF *tcbdbleafnew(TCBDB *bdb, uint64_t prev, uint64_t next);
static bool tcbdbleafcacheout(TCBDB *bdb, BDBLEAF *leaf);
static bool tcbdbleafsave(TCBDB *bdb, BDBLEAF *leaf);
static BDBLEAF *tcbdbleafload(TCBDB *bdb, uint64_t id);
static bool tcbdbleafcheck(TCBDB *bdb, uint64_t id);
static BDBLEAF *tcbdbgethistleaf(TCBDB *bdb, const char *kbuf, int ksiz, uint64_t id);
static bool tcbdbleafaddrec(TCBDB *bdb, BDBLEAF *leaf, int dmode,
const char *kbuf, int ksiz, const char *vbuf, int vsiz);
static BDBLEAF *tcbdbleafdivide(TCBDB *bdb, BDBLEAF *leaf);
static bool tcbdbleafkill(TCBDB *bdb, BDBLEAF *leaf);
static BDBNODE *tcbdbnodenew(TCBDB *bdb, uint64_t heir);
static bool tcbdbnodecacheout(TCBDB *bdb, BDBNODE *node);
static bool tcbdbnodesave(TCBDB *bdb, BDBNODE *node);
static BDBNODE *tcbdbnodeload(TCBDB *bdb, uint64_t id);
static void tcbdbnodeaddidx(TCBDB *bdb, BDBNODE *node, bool order, uint64_t pid,
const char *kbuf, int ksiz);
static bool tcbdbnodesubidx(TCBDB *bdb, BDBNODE *node, uint64_t pid);
static uint64_t tcbdbsearchleaf(TCBDB *bdb, const char *kbuf, int ksiz);
static BDBREC *tcbdbsearchrec(TCBDB *bdb, BDBLEAF *leaf, const char *kbuf, int ksiz, int *ip);
static void tcbdbremoverec(TCBDB *bdb, BDBLEAF *leaf, BDBREC *rec, int ri);
static bool tcbdbcacheadjust(TCBDB *bdb);
static void tcbdbcachepurge(TCBDB *bdb);
static bool tcbdbopenimpl(TCBDB *bdb, const char *path, int omode);
static bool tcbdbcloseimpl(TCBDB *bdb);
static bool tcbdbputimpl(TCBDB *bdb, const void *kbuf, int ksiz, const void *vbuf, int vsiz,
int dmode);
static bool tcbdboutimpl(TCBDB *bdb, const char *kbuf, int ksiz);
static bool tcbdboutlist(TCBDB *bdb, const char *kbuf, int ksiz);
static const char *tcbdbgetimpl(TCBDB *bdb, const char *kbuf, int ksiz, int *sp);
static int tcbdbgetnum(TCBDB *bdb, const char *kbuf, int ksiz);
static TCLIST *tcbdbgetlist(TCBDB *bdb, const char *kbuf, int ksiz);
static bool tcbdbrangeimpl(TCBDB *bdb, const char *bkbuf, int bksiz, bool binc,
const char *ekbuf, int eksiz, bool einc, int max, TCLIST *keys);
static bool tcbdbrangefwm(TCBDB *bdb, const char *pbuf, int psiz, int max, TCLIST *keys);
static bool tcbdboptimizeimpl(TCBDB *bdb, int32_t lmemb, int32_t nmemb,
int64_t bnum, int8_t apow, int8_t fpow, uint8_t opts);
static bool tcbdbvanishimpl(TCBDB *bdb);
static bool tcbdblockmethod(TCBDB *bdb, bool wr);
static bool tcbdbunlockmethod(TCBDB *bdb);
static bool tcbdblockcache(TCBDB *bdb);
static bool tcbdbunlockcache(TCBDB *bdb);
static bool tcbdbcurfirstimpl(BDBCUR *cur);
static bool tcbdbcurlastimpl(BDBCUR *cur);
static bool tcbdbcurjumpimpl(BDBCUR *cur, const char *kbuf, int ksiz, bool forward);
static bool tcbdbcuradjust(BDBCUR *cur, bool forward);
static bool tcbdbcurprevimpl(BDBCUR *cur);
static bool tcbdbcurnextimpl(BDBCUR *cur);
static bool tcbdbcurputimpl(BDBCUR *cur, const char *vbuf, int vsiz, int mode);
static bool tcbdbcuroutimpl(BDBCUR *cur);
static bool tcbdbcurrecimpl(BDBCUR *cur, const char **kbp, int *ksp, const char **vbp, int *vsp);
static bool tcbdbforeachimpl(TCBDB *bdb, TCITER iter, void *op);
/* debugging function prototypes */
void tcbdbprintmeta(TCBDB *bdb);
void tcbdbprintleaf(TCBDB *bdb, BDBLEAF *leaf);
void tcbdbprintnode(TCBDB *bdb, BDBNODE *node);
/*************************************************************************************************
* API
*************************************************************************************************/
/* Get the message string corresponding to an error code. */
const char *tcbdberrmsg(int ecode){
return tcerrmsg(ecode);
}
/* Create a B+ tree database object. */
TCBDB *tcbdbnew(void){
TCBDB *bdb;
TCMALLOC(bdb, sizeof(*bdb));
tcbdbclear(bdb);
bdb->hdb = tchdbnew();
TCMALLOC(bdb->hist, sizeof(*bdb->hist) * BDBLEVELMAX);
tchdbtune(bdb->hdb, BDBDEFBNUM, BDBDEFAPOW, BDBDEFFPOW, 0);
tchdbsetxmsiz(bdb->hdb, 0);
return bdb;
}
/* Delete a B+ tree database object. */
void tcbdbdel(TCBDB *bdb){
assert(bdb);
if(bdb->open) tcbdbclose(bdb);
TCFREE(bdb->hist);
tchdbdel(bdb->hdb);
if(bdb->mmtx){
pthread_mutex_destroy(bdb->cmtx);
pthread_rwlock_destroy(bdb->mmtx);
TCFREE(bdb->cmtx);
TCFREE(bdb->mmtx);
}
TCFREE(bdb);
}
/* Get the last happened error code of a B+ tree database object. */
int tcbdbecode(TCBDB *bdb){
assert(bdb);
return tchdbecode(bdb->hdb);
}
/* Set mutual exclusion control of a B+ tree database object for threading. */
bool tcbdbsetmutex(TCBDB *bdb){
assert(bdb);
if(!TCUSEPTHREAD) return true;
if(bdb->mmtx || bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
return false;
}
TCMALLOC(bdb->mmtx, sizeof(pthread_rwlock_t));
TCMALLOC(bdb->cmtx, sizeof(pthread_mutex_t));
bool err = false;
if(pthread_rwlock_init(bdb->mmtx, NULL) != 0) err = true;
if(pthread_mutex_init(bdb->cmtx, NULL) != 0) err = true;
if(err){
TCFREE(bdb->cmtx);
TCFREE(bdb->mmtx);
bdb->cmtx = NULL;
bdb->mmtx = NULL;
return false;
}
return tchdbsetmutex(bdb->hdb);
}
/* Set the custom comparison function of a B+ tree database object. */
bool tcbdbsetcmpfunc(TCBDB *bdb, TCCMP cmp, void *cmpop){
assert(bdb && cmp);
if(bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
return false;
}
bdb->cmp = cmp;
bdb->cmpop = cmpop;
return true;
}
/* Set the tuning parameters of a B+ tree database object. */
bool tcbdbtune(TCBDB *bdb, int32_t lmemb, int32_t nmemb,
int64_t bnum, int8_t apow, int8_t fpow, uint8_t opts){
assert(bdb);
if(bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
return false;
}
bdb->lmemb = (lmemb > 0) ? tclmax(lmemb, BDBMINLMEMB) : BDBDEFLMEMB;
bdb->nmemb = (nmemb > 0) ? tclmax(nmemb, BDBMINNMEMB) : BDBDEFNMEMB;
bdb->opts = opts;
uint8_t hopts = 0;
if(opts & BDBTLARGE) hopts |= HDBTLARGE;
if(opts & BDBTDEFLATE) hopts |= HDBTDEFLATE;
if(opts & BDBTBZIP) hopts |= HDBTBZIP;
if(opts & BDBTTCBS) hopts |= HDBTTCBS;
if(opts & BDBTEXCODEC) hopts |= HDBTEXCODEC;
bnum = (bnum > 0) ? bnum : BDBDEFBNUM;
apow = (apow >= 0) ? apow : BDBDEFAPOW;
fpow = (fpow >= 0) ? fpow : BDBDEFFPOW;
return tchdbtune(bdb->hdb, bnum, apow, fpow, hopts);
}
/* Set the caching parameters of a B+ tree database object. */
bool tcbdbsetcache(TCBDB *bdb, int32_t lcnum, int32_t ncnum){
assert(bdb);
if(bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
return false;
}
if(lcnum > 0) bdb->lcnum = tclmax(lcnum, BDBLEVELMAX);
if(ncnum > 0) bdb->ncnum = tclmax(ncnum, BDBLEVELMAX);
return true;
}
/* Set the size of the extra mapped memory of a B+ tree database object. */
bool tcbdbsetxmsiz(TCBDB *bdb, int64_t xmsiz){
assert(bdb);
if(bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
return false;
}
return tchdbsetxmsiz(bdb->hdb, xmsiz);
}
/* Set the unit step number of auto defragmentation of a B+ tree database object. */
bool tcbdbsetdfunit(TCBDB *bdb, int32_t dfunit){
assert(bdb);
if(bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
return false;
}
return tchdbsetdfunit(bdb->hdb, dfunit);
}
/* Open a database file and connect a B+ tree database object. */
bool tcbdbopen(TCBDB *bdb, const char *path, int omode){
assert(bdb && path);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
bool rv = tcbdbopenimpl(bdb, path, omode);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Close a B+ tree database object. */
bool tcbdbclose(TCBDB *bdb){
assert(bdb);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
bool rv = tcbdbcloseimpl(bdb);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Store a record into a B+ tree database object. */
bool tcbdbput(TCBDB *bdb, const void *kbuf, int ksiz, const void *vbuf, int vsiz){
assert(bdb && kbuf && ksiz >= 0 && vbuf && vsiz >= 0);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
bool rv = tcbdbputimpl(bdb, kbuf, ksiz, vbuf, vsiz, BDBPDOVER);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Store a string record into a B+ tree database object. */
bool tcbdbput2(TCBDB *bdb, const char *kstr, const char *vstr){
assert(bdb && kstr && vstr);
return tcbdbput(bdb, kstr, strlen(kstr), vstr, strlen(vstr));
}
/* Store a new record into a B+ tree database object. */
bool tcbdbputkeep(TCBDB *bdb, const void *kbuf, int ksiz, const void *vbuf, int vsiz){
assert(bdb && kbuf && ksiz >= 0 && vbuf && vsiz >= 0);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
bool rv = tcbdbputimpl(bdb, kbuf, ksiz, vbuf, vsiz, BDBPDKEEP);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Store a new string record into a B+ tree database object. */
bool tcbdbputkeep2(TCBDB *bdb, const char *kstr, const char *vstr){
assert(bdb && kstr && vstr);
return tcbdbputkeep(bdb, kstr, strlen(kstr), vstr, strlen(vstr));
}
/* Concatenate a value at the end of the existing record in a B+ tree database object. */
bool tcbdbputcat(TCBDB *bdb, const void *kbuf, int ksiz, const void *vbuf, int vsiz){
assert(bdb && kbuf && ksiz >= 0 && vbuf && vsiz >= 0);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
bool rv = tcbdbputimpl(bdb, kbuf, ksiz, vbuf, vsiz, BDBPDCAT);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Concatenate a string value at the end of the existing record in a B+ tree database object. */
bool tcbdbputcat2(TCBDB *bdb, const char *kstr, const char *vstr){
assert(bdb && kstr && vstr);
return tcbdbputcat(bdb, kstr, strlen(kstr), vstr, strlen(vstr));
}
/* Store a record into a B+ tree database object with allowing duplication of keys. */
bool tcbdbputdup(TCBDB *bdb, const void *kbuf, int ksiz, const void *vbuf, int vsiz){
assert(bdb && kbuf && ksiz >= 0 && vbuf && vsiz >= 0);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
bool rv = tcbdbputimpl(bdb, kbuf, ksiz, vbuf, vsiz, BDBPDDUP);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Store a string record into a B+ tree database object with allowing duplication of keys. */
bool tcbdbputdup2(TCBDB *bdb, const char *kstr, const char *vstr){
assert(bdb && kstr && vstr);
return tcbdbputdup(bdb, kstr, strlen(kstr), vstr, strlen(vstr));
}
/* Store records into a B+ tree database object with allowing duplication of keys. */
bool tcbdbputdup3(TCBDB *bdb, const void *kbuf, int ksiz, const TCLIST *vals){
assert(bdb && kbuf && ksiz >= 0 && vals);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
bool err = false;
int ln = TCLISTNUM(vals);
for(int i = 0; i < ln; i++){
const char *vbuf;
int vsiz;
TCLISTVAL(vbuf, vals, i, vsiz);
if(!tcbdbputimpl(bdb, kbuf, ksiz, vbuf, vsiz, BDBPDDUP)) err = true;
}
BDBUNLOCKMETHOD(bdb);
return !err;
}
/* Remove a record of a B+ tree database object. */
bool tcbdbout(TCBDB *bdb, const void *kbuf, int ksiz){
assert(bdb && kbuf && ksiz >= 0);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
bool rv = tcbdboutimpl(bdb, kbuf, ksiz);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Remove a string record of a B+ tree database object. */
bool tcbdbout2(TCBDB *bdb, const char *kstr){
assert(bdb && kstr);
return tcbdbout(bdb, kstr, strlen(kstr));
}
/* Remove records of a B+ tree database object. */
bool tcbdbout3(TCBDB *bdb, const void *kbuf, int ksiz){
assert(bdb && kbuf && ksiz >= 0);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
bool rv = tcbdboutlist(bdb, kbuf, ksiz);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Retrieve a record in a B+ tree database object. */
void *tcbdbget(TCBDB *bdb, const void *kbuf, int ksiz, int *sp){
assert(bdb && kbuf && ksiz >= 0 && sp);
if(!BDBLOCKMETHOD(bdb, false)) return NULL;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return NULL;
}
const char *vbuf = tcbdbgetimpl(bdb, kbuf, ksiz, sp);
char *rv;
if(vbuf){
TCMEMDUP(rv, vbuf, *sp);
} else {
rv = NULL;
}
bool adj = TCMAPRNUM(bdb->leafc) > bdb->lcnum || TCMAPRNUM(bdb->nodec) > bdb->ncnum;
BDBUNLOCKMETHOD(bdb);
if(adj && BDBLOCKMETHOD(bdb, true)){
if(!bdb->tran && !tcbdbcacheadjust(bdb)){
TCFREE(rv);
rv = NULL;
}
BDBUNLOCKMETHOD(bdb);
}
return rv;
}
/* Retrieve a string record in a B+ tree database object. */
char *tcbdbget2(TCBDB *bdb, const char *kstr){
assert(bdb && kstr);
int vsiz;
return tcbdbget(bdb, kstr, strlen(kstr), &vsiz);
}
/* Retrieve a record in a B+ tree database object and write the value into a buffer. */
const void *tcbdbget3(TCBDB *bdb, const void *kbuf, int ksiz, int *sp){
assert(bdb && kbuf && ksiz >= 0 && sp);
if(!BDBLOCKMETHOD(bdb, false)) return NULL;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return NULL;
}
const char *rv = tcbdbgetimpl(bdb, kbuf, ksiz, sp);
bool adj = TCMAPRNUM(bdb->leafc) > bdb->lcnum || TCMAPRNUM(bdb->nodec) > bdb->ncnum;
BDBUNLOCKMETHOD(bdb);
if(adj && BDBLOCKMETHOD(bdb, true)){
if(!bdb->tran && !tcbdbcacheadjust(bdb)) rv = NULL;
BDBUNLOCKMETHOD(bdb);
}
return rv;
}
/* Retrieve records in a B+ tree database object. */
TCLIST *tcbdbget4(TCBDB *bdb, const void *kbuf, int ksiz){
assert(bdb && kbuf && ksiz >= 0);
if(!BDBLOCKMETHOD(bdb, false)) return NULL;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return NULL;
}
TCLIST *rv = tcbdbgetlist(bdb, kbuf, ksiz);
bool adj = TCMAPRNUM(bdb->leafc) > bdb->lcnum || TCMAPRNUM(bdb->nodec) > bdb->ncnum;
BDBUNLOCKMETHOD(bdb);
if(adj && BDBLOCKMETHOD(bdb, true)){
if(!bdb->tran && !tcbdbcacheadjust(bdb)){
if(rv) tclistdel(rv);
rv = NULL;
}
BDBUNLOCKMETHOD(bdb);
}
return rv;
}
/* Get the number of records corresponding a key in a B+ tree database object. */
int tcbdbvnum(TCBDB *bdb, const void *kbuf, int ksiz){
assert(bdb && kbuf && ksiz >= 0);
if(!BDBLOCKMETHOD(bdb, false)) return 0;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return 0;
}
int rv = tcbdbgetnum(bdb, kbuf, ksiz);
bool adj = TCMAPRNUM(bdb->leafc) > bdb->lcnum || TCMAPRNUM(bdb->nodec) > bdb->ncnum;
BDBUNLOCKMETHOD(bdb);
if(adj && BDBLOCKMETHOD(bdb, true)){
if(!bdb->tran && !tcbdbcacheadjust(bdb)) rv = 0;
BDBUNLOCKMETHOD(bdb);
}
return rv;
}
/* Get the number of records corresponding a string key in a B+ tree database object. */
int tcbdbvnum2(TCBDB *bdb, const char *kstr){
assert(bdb && kstr);
return tcbdbvnum(bdb, kstr, strlen(kstr));
}
/* Get the size of the value of a record in a B+ tree database object. */
int tcbdbvsiz(TCBDB *bdb, const void *kbuf, int ksiz){
assert(bdb && kbuf && ksiz >= 0);
int vsiz;
if(!tcbdbget3(bdb, kbuf, ksiz, &vsiz)) return -1;
return vsiz;
}
/* Get the size of the value of a string record in a B+ tree database object. */
int tcbdbvsiz2(TCBDB *bdb, const char *kstr){
assert(bdb && kstr);
return tcbdbvsiz(bdb, kstr, strlen(kstr));
}
/* Get keys of ranged records in a B+ tree database object. */
TCLIST *tcbdbrange(TCBDB *bdb, const void *bkbuf, int bksiz, bool binc,
const void *ekbuf, int eksiz, bool einc, int max){
assert(bdb);
TCLIST *keys = tclistnew();
if(!BDBLOCKMETHOD(bdb, false)) return keys;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return keys;
}
tcbdbrangeimpl(bdb, bkbuf, bksiz, binc, ekbuf, eksiz, einc, max, keys);
bool adj = TCMAPRNUM(bdb->leafc) > bdb->lcnum || TCMAPRNUM(bdb->nodec) > bdb->ncnum;
BDBUNLOCKMETHOD(bdb);
if(adj && BDBLOCKMETHOD(bdb, true)){
tcbdbcacheadjust(bdb);
BDBUNLOCKMETHOD(bdb);
}
return keys;
}
/* Get string keys of ranged records in a B+ tree database object. */
TCLIST *tcbdbrange2(TCBDB *bdb, const char *bkstr, bool binc,
const char *ekstr, bool einc, int max){
assert(bdb);
return tcbdbrange(bdb, bkstr, bkstr ? strlen(bkstr) : 0, binc,
ekstr, ekstr ? strlen(ekstr) : 0, einc, max);
}
/* Get forward matching keys in a B+ tree database object. */
TCLIST *tcbdbfwmkeys(TCBDB *bdb, const void *pbuf, int psiz, int max){
assert(bdb && pbuf && psiz >= 0);
TCLIST *keys = tclistnew();
if(!BDBLOCKMETHOD(bdb, false)) return keys;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return keys;
}
tcbdbrangefwm(bdb, pbuf, psiz, max, keys);
bool adj = TCMAPRNUM(bdb->leafc) > bdb->lcnum || TCMAPRNUM(bdb->nodec) > bdb->ncnum;
BDBUNLOCKMETHOD(bdb);
if(adj && BDBLOCKMETHOD(bdb, true)){
tcbdbcacheadjust(bdb);
BDBUNLOCKMETHOD(bdb);
}
return keys;
}
/* Get forward matching string keys in a B+ tree database object. */
TCLIST *tcbdbfwmkeys2(TCBDB *bdb, const char *pstr, int max){
assert(bdb && pstr);
return tcbdbfwmkeys(bdb, pstr, strlen(pstr), max);
}
/* Add an integer to a record in a B+ tree database object. */
int tcbdbaddint(TCBDB *bdb, const void *kbuf, int ksiz, int num){
assert(bdb && kbuf && ksiz >= 0);
if(!BDBLOCKMETHOD(bdb, true)) return INT_MIN;
if(!bdb->open || !bdb->wmode){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return INT_MIN;
}
bool rv = tcbdbputimpl(bdb, kbuf, ksiz, (char *)&num, sizeof(num), BDBPDADDINT);
BDBUNLOCKMETHOD(bdb);
return rv ? num : INT_MIN;
}
/* Add a real number to a record in a B+ tree database object. */
double tcbdbadddouble(TCBDB *bdb, const void *kbuf, int ksiz, double num){
assert(bdb && kbuf && ksiz >= 0);
if(!BDBLOCKMETHOD(bdb, true)) return nan("");
if(!bdb->open || !bdb->wmode){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return nan("");
}
bool rv = tcbdbputimpl(bdb, kbuf, ksiz, (char *)&num, sizeof(num), BDBPDADDDBL);
BDBUNLOCKMETHOD(bdb);
return rv ? num : nan("");
}
/* Synchronize updated contents of a B+ tree database object with the file and the device. */
bool tcbdbsync(TCBDB *bdb){
assert(bdb);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode || bdb->tran){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
bool rv = tcbdbmemsync(bdb, true);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Optimize the file of a B+ tree database object. */
bool tcbdboptimize(TCBDB *bdb, int32_t lmemb, int32_t nmemb,
int64_t bnum, int8_t apow, int8_t fpow, uint8_t opts){
assert(bdb);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode || bdb->tran){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
BDBTHREADYIELD(bdb);
bool rv = tcbdboptimizeimpl(bdb, lmemb, nmemb, bnum, apow, fpow, opts);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Remove all records of a B+ tree database object. */
bool tcbdbvanish(TCBDB *bdb){
assert(bdb);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode || bdb->tran){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
BDBTHREADYIELD(bdb);
bool rv = tcbdbvanishimpl(bdb);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Copy the database file of a B+ tree database object. */
bool tcbdbcopy(TCBDB *bdb, const char *path){
assert(bdb && path);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
BDBTHREADYIELD(bdb);
TCLIST *lids = tclistnew();
TCLIST *nids = tclistnew();
const char *vbuf;
int vsiz;
TCMAP *leafc = bdb->leafc;
tcmapiterinit(leafc);
while((vbuf = tcmapiternext(leafc, &vsiz)) != NULL){
TCLISTPUSH(lids, vbuf, vsiz);
}
TCMAP *nodec = bdb->nodec;
tcmapiterinit(nodec);
while((vbuf = tcmapiternext(nodec, &vsiz)) != NULL){
TCLISTPUSH(nids, vbuf, vsiz);
}
BDBUNLOCKMETHOD(bdb);
bool err = false;
int ln = TCLISTNUM(lids);
for(int i = 0; i < ln; i++){
vbuf = TCLISTVALPTR(lids, i);
if(BDBLOCKMETHOD(bdb, true)){
BDBTHREADYIELD(bdb);
if(bdb->open){
int rsiz;
BDBLEAF *leaf = (BDBLEAF *)tcmapget(bdb->leafc, vbuf, sizeof(leaf->id), &rsiz);
if(leaf && leaf->dirty && !tcbdbleafsave(bdb, leaf)) err = true;
} else {
err = true;
}
BDBUNLOCKMETHOD(bdb);
} else {
err = true;
}
}
ln = TCLISTNUM(nids);
for(int i = 0; i < ln; i++){
vbuf = TCLISTVALPTR(nids, i);
if(BDBLOCKMETHOD(bdb, true)){
if(bdb->open){
int rsiz;
BDBNODE *node = (BDBNODE *)tcmapget(bdb->nodec, vbuf, sizeof(node->id), &rsiz);
if(node && node->dirty && !tcbdbnodesave(bdb, node)) err = true;
} else {
err = true;
}
BDBUNLOCKMETHOD(bdb);
} else {
err = true;
}
}
tclistdel(nids);
tclistdel(lids);
if(!tcbdbtranbegin(bdb)) err = true;
if(BDBLOCKMETHOD(bdb, false)){
BDBTHREADYIELD(bdb);
if(!tchdbcopy(bdb->hdb, path)) err = true;
BDBUNLOCKMETHOD(bdb);
} else {
err = true;
}
if(!tcbdbtrancommit(bdb)) err = true;
return !err;
}
/* Begin the transaction of a B+ tree database object. */
bool tcbdbtranbegin(TCBDB *bdb){
assert(bdb);
#if defined (__MINGW__) || defined (__WIN32__) && !defined (__CYGWINDLL_)
long int clt_tck = CLOCKS_PER_SEC;
#else
long int clt_tck = sysconf(_SC_CLK_TCK);
#endif
for(double wsec = 1.0 / clt_tck; true; wsec *= 2){
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
if(!bdb->tran) break;
BDBUNLOCKMETHOD(bdb);
if(wsec > 1.0) wsec = 1.0;
tcsleep(wsec);
}
if(!tcbdbmemsync(bdb, false)){
BDBUNLOCKMETHOD(bdb);
return false;
}
if(!tchdbtranbegin(bdb->hdb)){
BDBUNLOCKMETHOD(bdb);
return false;
}
bdb->tran = true;
TCMEMDUP(bdb->rbopaque, bdb->opaque, BDBOPAQUESIZ);
BDBUNLOCKMETHOD(bdb);
return true;
}
/* Commit the transaction of a B+ tree database object. */
bool tcbdbtrancommit(TCBDB *bdb){
assert(bdb);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode || !bdb->tran){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
TCFREE(bdb->rbopaque);
bdb->tran = false;
bdb->rbopaque = NULL;
bool err = false;
if(!tcbdbmemsync(bdb, false)) err = true;
if(!tcbdbcacheadjust(bdb)) err = true;
if(err){
tchdbtranabort(bdb->hdb);
} else if(!tchdbtrancommit(bdb->hdb)){
err = true;
}
BDBUNLOCKMETHOD(bdb);
return !err;
}
/* Abort the transaction of a B+ tree database object. */
bool tcbdbtranabort(TCBDB *bdb){
assert(bdb);
if(!BDBLOCKMETHOD(bdb, true)) return false;
if(!bdb->open || !bdb->wmode || !bdb->tran){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
tcbdbcachepurge(bdb);
memcpy(bdb->opaque, bdb->rbopaque, BDBOPAQUESIZ);
tcbdbloadmeta(bdb);
TCFREE(bdb->rbopaque);
bdb->tran = false;
bdb->rbopaque = NULL;
bdb->hleaf = 0;
bdb->lleaf = 0;
bdb->clock++;
bool err = false;
if(!tcbdbcacheadjust(bdb)) err = true;
if(!tchdbtranvoid(bdb->hdb)) err = true;
BDBUNLOCKMETHOD(bdb);
return !err;
}
/* Get the file path of a B+ tree database object. */
const char *tcbdbpath(TCBDB *bdb){
assert(bdb);
if(!BDBLOCKMETHOD(bdb, false)) return NULL;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return NULL;
}
const char *rv = tchdbpath(bdb->hdb);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Get the number of records of a B+ tree database object. */
uint64_t tcbdbrnum(TCBDB *bdb){
assert(bdb);
if(!BDBLOCKMETHOD(bdb, false)) return 0;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return 0;
}
uint64_t rv = bdb->rnum;
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Get the size of the database file of a B+ tree database object. */
uint64_t tcbdbfsiz(TCBDB *bdb){
assert(bdb);
if(!BDBLOCKMETHOD(bdb, false)) return 0;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return 0;
}
uint64_t rv = tchdbfsiz(bdb->hdb);
BDBUNLOCKMETHOD(bdb);
return rv;
}
/* Create a cursor object. */
BDBCUR *tcbdbcurnew(TCBDB *bdb){
assert(bdb);
BDBCUR *cur;
TCMALLOC(cur, sizeof(*cur));
cur->bdb = bdb;
cur->clock = 0;
cur->id = 0;
cur->kidx = 0;
cur->vidx = 0;
return cur;
}
/* Delete a cursor object. */
void tcbdbcurdel(BDBCUR *cur){
assert(cur);
TCFREE(cur);
}
/* Move a cursor object to the first record. */
bool tcbdbcurfirst(BDBCUR *cur){
assert(cur);
TCBDB *bdb = cur->bdb;
if(!BDBLOCKMETHOD(bdb, false)) return false;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}
bool rv = tcbdbcurfirstimpl(cur);
bool adj = TCMAPRNUM(bdb->leafc) > bdb->lcnum || TCMAPRNUM(bdb->nodec) > bdb->ncnum;
BDBUNLOCKMETHOD(bdb);
if(adj && BDBLOCKMETHOD(bdb, true)){
if(!bdb->tran && !tcbdbcacheadjust(bdb)) rv = false;
BDBUNLOCKMETHOD(bdb);
}
return rv;
}
/* Move a cursor object to the last record. */
bool tcbdbcurlast(BDBCUR *cur){
assert(cur);
TCBDB *bdb = cur->bdb;
if(!BDBLOCKMETHOD(bdb, false)) return false;
if(!bdb->open){
tcbdbsetecode(bdb, TCEINVALID, __FILE__, __LINE__, __func__);
BDBUNLOCKMETHOD(bdb);
return false;
}