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tcfdb.c
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/*************************************************************************************************
* The fixed-length database API of Tokyo Cabinet
* Copyright (C) 2006-2009 Mikio Hirabayashi
* 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 "tcfdb.h"
#include "myconf.h"
#define FDBFILEMODE 00644 // permission of created files
#define FDBIOBUFSIZ 8192 // size of an I/O buffer
#define FDBMAGICDATA "ToKyO CaBiNeT" // magic data for identification
#define FDBHEADSIZ 256 // size of the reagion of the header
#define FDBTYPEOFF 32 // offset of the region for the database type
#define FDBFLAGSOFF 33 // offset of the region for the additional flags
#define FDBRNUMOFF 48 // offset of the region for the record number
#define FDBFSIZOFF 56 // offset of the region for the file size
#define FDBWIDTHOFF 64 // offset of the region for the record width
#define FDBLIMSIZOFF 72 // offset of the region for the limit size
#define FDBMINOFF 80 // offset of the region for the minimum ID offset
#define FDBMAXOFF 88 // offset of the region for the maximum ID offset
#define FDBOPAQUEOFF 128 // offset of the region for the opaque field
#define FDBDEFWIDTH 255 // default value width
#define FDBDEFLIMSIZ (256LL<<20) // default limit size
#define FDBRMTXNUM 127 // number of record mutexes
#define FDBTRUNCALW 256 // number of record for truncate allowance
#define FDBIDARYUNIT 2048 // size of ID array allocation unit
#define FDBWALSUFFIX "wal" // suffix of write ahead logging file
enum { // enumeration for duplication behavior
FDBPDOVER, // overwrite an existing value
FDBPDKEEP, // keep the existing value
FDBPDCAT, // concatenate values
FDBPDADDINT, // add an integer
FDBPDADDDBL, // add a real number
FDBPDPROC // process by a callback function
};
typedef struct { // type of structure for a duplication callback
TCPDPROC proc; // function pointer
void *op; // opaque pointer
} FDBPDPROCOP;
/* private macros */
#define FDBLOCKMETHOD(TC_fdb, TC_wr) \
((TC_fdb)->mmtx ? tcfdblockmethod((TC_fdb), (TC_wr)) : true)
#define FDBUNLOCKMETHOD(TC_fdb) \
((TC_fdb)->mmtx ? tcfdbunlockmethod(TC_fdb) : true)
#define FDBLOCKATTR(TC_fdb) \
((TC_fdb)->mmtx ? tcfdblockattr(TC_fdb) : true)
#define FDBUNLOCKATTR(TC_fdb) \
((TC_fdb)->mmtx ? tcfdbunlockattr(TC_fdb) : true)
#define FDBLOCKRECORD(TC_fdb, TC_wr, TC_id) \
((TC_fdb)->mmtx ? tcfdblockrecord((TC_fdb), (TC_wr), (TC_id)) : true)
#define FDBUNLOCKRECORD(TC_fdb, TC_id) \
((TC_fdb)->mmtx ? tcfdbunlockrecord((TC_fdb), (TC_id)) : true)
#define FDBLOCKALLRECORDS(TC_fdb, TC_wr) \
((TC_fdb)->mmtx ? tcfdblockallrecords((TC_fdb), (TC_wr)) : true)
#define FDBUNLOCKALLRECORDS(TC_fdb) \
((TC_fdb)->mmtx ? tcfdbunlockallrecords(TC_fdb) : true)
#define FDBLOCKWAL(TC_fdb) \
((TC_fdb)->mmtx ? tcfdblockwal(TC_fdb) : true)
#define FDBUNLOCKWAL(TC_fdb) \
((TC_fdb)->mmtx ? tcfdbunlockwal(TC_fdb) : true)
#define FDBTHREADYIELD(TC_fdb) \
do { if((TC_fdb)->mmtx) sched_yield(); } while(false)
/* private function prototypes */
static void tcfdbdumpmeta(TCFDB *fdb, char *hbuf);
static void tcfdbloadmeta(TCFDB *fdb, const char *hbuf);
static void tcfdbclear(TCFDB *fdb);
static void tcfdbsetflag(TCFDB *fdb, int flag, bool sign);
static bool tcfdbwalinit(TCFDB *fdb);
static bool tcfdbwalwrite(TCFDB *fdb, uint64_t off, int64_t size);
static int tcfdbwalrestore(TCFDB *fdb, const char *path);
static bool tcfdbwalremove(TCFDB *fdb, const char *path);
static bool tcfdbopenimpl(TCFDB *fdb, const char *path, int omode);
static bool tcfdbcloseimpl(TCFDB *fdb);
static int64_t tcfdbprevid(TCFDB *fdb, int64_t id);
static int64_t tcfdbnextid(TCFDB *fdb, int64_t id);
static bool tcfdbputimpl(TCFDB *fdb, int64_t id, const void *vbuf, int vsiz, int dmode);
static bool tcfdboutimpl(TCFDB *fdb, int64_t id);
static const void *tcfdbgetimpl(TCFDB *fdb, int64_t id, int *sp);
static bool tcfdbiterinitimpl(TCFDB *fdb);
static uint64_t tcfdbiternextimpl(TCFDB *fdb);
static uint64_t *tcfdbrangeimpl(TCFDB *fdb, int64_t lower, int64_t upper, int max, int *np);
static bool tcfdboptimizeimpl(TCFDB *fdb, int32_t width, int64_t limsiz);
static bool tcfdbvanishimpl(TCFDB *fdb);
static bool tcfdbcopyimpl(TCFDB *fdb, const char *path);
static bool tcfdbiterjumpimpl(TCFDB *fdb, int64_t id);
static bool tcfdbforeachimpl(TCFDB *fdb, TCITER iter, void *op);
static bool tcfdblockmethod(TCFDB *fdb, bool wr);
static bool tcfdbunlockmethod(TCFDB *fdb);
static bool tcfdblockattr(TCFDB *fdb);
static bool tcfdbunlockattr(TCFDB *fdb);
static bool tcfdblockrecord(TCFDB *fdb, bool wr, uint64_t id);
static bool tcfdbunlockrecord(TCFDB *fdb, uint64_t id);
static bool tcfdblockallrecords(TCFDB *fdb, bool wr);
static bool tcfdbunlockallrecords(TCFDB *fdb);
static bool tcfdblockwal(TCFDB *fdb);
static bool tcfdbunlockwal(TCFDB *fdb);
/* debugging function prototypes */
void tcfdbprintmeta(TCFDB *fdb);
/*************************************************************************************************
* API
*************************************************************************************************/
/* Get the message string corresponding to an error code. */
const char *tcfdberrmsg(int ecode){
return tcerrmsg(ecode);
}
/* Create a fixed-length database object. */
TCFDB *tcfdbnew(void){
TCFDB *fdb;
TCMALLOC(fdb, sizeof(*fdb));
tcfdbclear(fdb);
return fdb;
}
/* Delete a fixed-length database object. */
void tcfdbdel(TCFDB *fdb){
assert(fdb);
if(fdb->fd >= 0) tcfdbclose(fdb);
if(fdb->mmtx){
pthread_key_delete(*(pthread_key_t *)fdb->eckey);
pthread_mutex_destroy(fdb->wmtx);
pthread_mutex_destroy(fdb->tmtx);
for(int i = FDBRMTXNUM - 1; i >= 0; i--){
pthread_rwlock_destroy((pthread_rwlock_t *)fdb->rmtxs + i);
}
pthread_mutex_destroy(fdb->amtx);
pthread_rwlock_destroy(fdb->mmtx);
TCFREE(fdb->eckey);
TCFREE(fdb->wmtx);
TCFREE(fdb->tmtx);
TCFREE(fdb->rmtxs);
TCFREE(fdb->amtx);
TCFREE(fdb->mmtx);
}
TCFREE(fdb);
}
/* Get the last happened error code of a fixed-length database object. */
int tcfdbecode(TCFDB *fdb){
assert(fdb);
return fdb->mmtx ?
(int)(intptr_t)pthread_getspecific(*(pthread_key_t *)fdb->eckey) : fdb->ecode;
}
/* Set mutual exclusion control of a fixed-length database object for threading. */
bool tcfdbsetmutex(TCFDB *fdb){
assert(fdb);
if(!TCUSEPTHREAD) return true;
if(fdb->mmtx || fdb->fd >= 0){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
return false;
}
TCMALLOC(fdb->mmtx, sizeof(pthread_rwlock_t));
TCMALLOC(fdb->amtx, sizeof(pthread_mutex_t));
TCMALLOC(fdb->rmtxs, sizeof(pthread_rwlock_t) * FDBRMTXNUM);
TCMALLOC(fdb->tmtx, sizeof(pthread_mutex_t));
TCMALLOC(fdb->wmtx, sizeof(pthread_mutex_t));
TCMALLOC(fdb->eckey, sizeof(pthread_key_t));
bool err = false;
if(pthread_rwlock_init(fdb->mmtx, NULL) != 0) err = true;
if(pthread_mutex_init(fdb->amtx, NULL) != 0) err = true;
for(int i = 0; i < FDBRMTXNUM; i++){
if(pthread_rwlock_init((pthread_rwlock_t *)fdb->rmtxs + i, NULL) != 0) err = true;
}
if(pthread_mutex_init(fdb->tmtx, NULL) != 0) err = true;
if(pthread_mutex_init(fdb->wmtx, NULL) != 0) err = true;
if(pthread_key_create(fdb->eckey, NULL) != 0) err = true;
if(err){
TCFREE(fdb->eckey);
TCFREE(fdb->wmtx);
TCFREE(fdb->tmtx);
TCFREE(fdb->rmtxs);
TCFREE(fdb->amtx);
TCFREE(fdb->mmtx);
fdb->eckey = NULL;
fdb->wmtx = NULL;
fdb->tmtx = NULL;
fdb->rmtxs = NULL;
fdb->amtx = NULL;
fdb->mmtx = NULL;
return false;
}
return true;
}
/* Set the tuning parameters of a fixed-length database object. */
bool tcfdbtune(TCFDB *fdb, int32_t width, int64_t limsiz){
assert(fdb);
if(fdb->fd >= 0){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
return false;
}
fdb->width = (width > 0) ? width : FDBDEFWIDTH;
fdb->limsiz = (limsiz > 0) ? limsiz : FDBDEFLIMSIZ;
if(fdb->limsiz < FDBHEADSIZ + fdb->width + sizeof(uint32_t))
fdb->limsiz = FDBHEADSIZ + fdb->width + sizeof(uint32_t);
fdb->limsiz = tcpagealign(fdb->limsiz);
return true;
}
/* Open a database file and connect a fixed-length database object. */
bool tcfdbopen(TCFDB *fdb, const char *path, int omode){
assert(fdb && path);
if(!FDBLOCKMETHOD(fdb, true)) return false;
if(fdb->fd >= 0){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
char *rpath = tcrealpath(path);
if(!rpath){
int ecode = TCEOPEN;
switch(errno){
case EACCES: ecode = TCENOPERM; break;
case ENOENT: ecode = TCENOFILE; break;
case ENOTDIR: ecode = TCENOFILE; break;
}
tcfdbsetecode(fdb, ecode, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(!tcpathlock(rpath)){
tcfdbsetecode(fdb, TCETHREAD, __FILE__, __LINE__, __func__);
TCFREE(rpath);
FDBUNLOCKMETHOD(fdb);
return false;
}
bool rv = tcfdbopenimpl(fdb, path, omode);
if(rv){
fdb->rpath = rpath;
} else {
tcpathunlock(rpath);
TCFREE(rpath);
}
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Close a fixed-length database object. */
bool tcfdbclose(TCFDB *fdb){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, true)) return false;
if(fdb->fd < 0){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
bool rv = tcfdbcloseimpl(fdb);
tcpathunlock(fdb->rpath);
TCFREE(fdb->rpath);
fdb->rpath = NULL;
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Store a record into a fixed-length database object. */
bool tcfdbput(TCFDB *fdb, int64_t id, const void *vbuf, int vsiz){
assert(fdb && vbuf && vsiz >= 0);
if(!FDBLOCKMETHOD(fdb, id < 1)) return false;
if(fdb->fd < 0 || !(fdb->omode & FDBOWRITER)){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(id == FDBIDMIN){
id = fdb->min;
} else if(id == FDBIDPREV){
id = fdb->min - 1;
} else if(id == FDBIDMAX){
id = fdb->max;
} else if(id == FDBIDNEXT){
id = fdb->max + 1;
}
if(id < 1 || id > fdb->limid){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(!FDBLOCKRECORD(fdb, true, id)){
FDBUNLOCKMETHOD(fdb);
return false;
}
bool rv = tcfdbputimpl(fdb, id, vbuf, vsiz, FDBPDOVER);
FDBUNLOCKRECORD(fdb, id);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Store a record with a decimal key into a fixed-length database object. */
bool tcfdbput2(TCFDB *fdb, const void *kbuf, int ksiz, const void *vbuf, int vsiz){
assert(fdb && kbuf && ksiz >= 0 && vbuf && vsiz >= 0);
return tcfdbput(fdb, tcfdbkeytoid(kbuf, ksiz), vbuf, vsiz);
}
/* Store a string record with a decimal key into a fixed-length database object. */
bool tcfdbput3(TCFDB *fdb, const char *kstr, const void *vstr){
assert(fdb && kstr && vstr);
return tcfdbput(fdb, tcfdbkeytoid(kstr, strlen(kstr)), vstr, strlen(vstr));
}
/* Store a new record into a fixed-length database object. */
bool tcfdbputkeep(TCFDB *fdb, int64_t id, const void *vbuf, int vsiz){
assert(fdb && vbuf && vsiz >= 0);
if(!FDBLOCKMETHOD(fdb, id < 1)) return false;
if(fdb->fd < 0 || !(fdb->omode & FDBOWRITER)){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(id == FDBIDMIN){
id = fdb->min;
} else if(id == FDBIDPREV){
id = fdb->min - 1;
} else if(id == FDBIDMAX){
id = fdb->max;
} else if(id == FDBIDNEXT){
id = fdb->max + 1;
}
if(id < 1 || id > fdb->limid){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(!FDBLOCKRECORD(fdb, true, id)){
FDBUNLOCKMETHOD(fdb);
return false;
}
bool rv = tcfdbputimpl(fdb, id, vbuf, vsiz, FDBPDKEEP);
FDBUNLOCKRECORD(fdb, id);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Store a new record with a decimal key into a fixed-length database object. */
bool tcfdbputkeep2(TCFDB *fdb, const void *kbuf, int ksiz, const void *vbuf, int vsiz){
assert(fdb && kbuf && ksiz >= 0 && vbuf && vsiz >= 0);
return tcfdbputkeep(fdb, tcfdbkeytoid(kbuf, ksiz), vbuf, vsiz);
}
/* Store a new string record with a decimal key into a fixed-length database object. */
bool tcfdbputkeep3(TCFDB *fdb, const char *kstr, const void *vstr){
assert(fdb && kstr && vstr);
return tcfdbputkeep(fdb, tcfdbkeytoid(kstr, strlen(kstr)), vstr, strlen(vstr));
}
/* Concatenate a value at the end of the existing record in a fixed-length database object. */
bool tcfdbputcat(TCFDB *fdb, int64_t id, const void *vbuf, int vsiz){
assert(fdb && vbuf && vsiz >= 0);
if(!FDBLOCKMETHOD(fdb, id < 1)) return false;
if(fdb->fd < 0 || !(fdb->omode & FDBOWRITER)){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(id == FDBIDMIN){
id = fdb->min;
} else if(id == FDBIDPREV){
id = fdb->min - 1;
} else if(id == FDBIDMAX){
id = fdb->max;
} else if(id == FDBIDNEXT){
id = fdb->max + 1;
}
if(id < 1 || id > fdb->limid){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(!FDBLOCKRECORD(fdb, true, id)){
FDBUNLOCKMETHOD(fdb);
return false;
}
bool rv = tcfdbputimpl(fdb, id, vbuf, vsiz, FDBPDCAT);
FDBUNLOCKRECORD(fdb, id);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Concatenate a value with a decimal key in a fixed-length database object. */
bool tcfdbputcat2(TCFDB *fdb, const void *kbuf, int ksiz, const void *vbuf, int vsiz){
assert(fdb && kbuf && ksiz >= 0 && vbuf && vsiz >= 0);
return tcfdbputcat(fdb, tcfdbkeytoid(kbuf, ksiz), vbuf, vsiz);
}
/* Concatenate a string value with a decimal key in a fixed-length database object. */
bool tcfdbputcat3(TCFDB *fdb, const char *kstr, const void *vstr){
assert(fdb && kstr && vstr);
return tcfdbputcat(fdb, tcfdbkeytoid(kstr, strlen(kstr)), vstr, strlen(vstr));
}
/* Remove a record of a fixed-length database object. */
bool tcfdbout(TCFDB *fdb, int64_t id){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, true)) return false;
if(fdb->fd < 0 || !(fdb->omode & FDBOWRITER)){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(id == FDBIDMIN){
id = fdb->min;
} else if(id == FDBIDMAX){
id = fdb->max;
}
if(id < 1 || id > fdb->limid){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(!FDBLOCKRECORD(fdb, true, id)){
FDBUNLOCKMETHOD(fdb);
return false;
}
bool rv = tcfdboutimpl(fdb, id);
FDBUNLOCKRECORD(fdb, id);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Remove a record with a decimal key of a fixed-length database object. */
bool tcfdbout2(TCFDB *fdb, const void *kbuf, int ksiz){
assert(fdb && kbuf && ksiz >= 0);
return tcfdbout(fdb, tcfdbkeytoid(kbuf, ksiz));
}
/* Remove a string record with a decimal key of a fixed-length database object. */
bool tcfdbout3(TCFDB *fdb, const char *kstr){
assert(fdb && kstr);
return tcfdbout(fdb, tcfdbkeytoid(kstr, strlen(kstr)));
}
/* Retrieve a record in a fixed-length database object. */
void *tcfdbget(TCFDB *fdb, int64_t id, int *sp){
assert(fdb && sp);
if(!FDBLOCKMETHOD(fdb, false)) return false;
if(fdb->fd < 0){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(id == FDBIDMIN){
id = fdb->min;
} else if(id == FDBIDMAX){
id = fdb->max;
}
if(id < 1 || id > fdb->limid){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(!FDBLOCKRECORD(fdb, false, id)){
FDBUNLOCKMETHOD(fdb);
return false;
}
const void *vbuf = tcfdbgetimpl(fdb, id, sp);
char *rv = vbuf ? tcmemdup(vbuf, *sp) : NULL;
FDBUNLOCKRECORD(fdb, id);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Retrieve a record with a decimal key in a fixed-length database object. */
void *tcfdbget2(TCFDB *fdb, const void *kbuf, int ksiz, int *sp){
assert(fdb && kbuf && ksiz >= 0 && sp);
return tcfdbget(fdb, tcfdbkeytoid(kbuf, ksiz), sp);
}
/* Retrieve a string record with a decimal key in a fixed-length database object. */
char *tcfdbget3(TCFDB *fdb, const char *kstr){
assert(fdb && kstr);
int vsiz;
return tcfdbget(fdb, tcfdbkeytoid(kstr, strlen(kstr)), &vsiz);
}
/* Retrieve a record in a fixed-length database object and write the value into a buffer. */
int tcfdbget4(TCFDB *fdb, int64_t id, void *vbuf, int max){
assert(fdb && vbuf && max >= 0);
if(!FDBLOCKMETHOD(fdb, false)) return false;
if(fdb->fd < 0){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(id == FDBIDMIN){
id = fdb->min;
} else if(id == FDBIDMAX){
id = fdb->max;
}
if(id < 1 || id > fdb->limid){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(!FDBLOCKRECORD(fdb, false, id)){
FDBUNLOCKMETHOD(fdb);
return false;
}
int vsiz;
const void *rbuf = tcfdbgetimpl(fdb, id, &vsiz);
if(rbuf){
if(vsiz > max) vsiz = max;
memcpy(vbuf, rbuf, vsiz);
} else {
vsiz = -1;
}
FDBUNLOCKRECORD(fdb, id);
FDBUNLOCKMETHOD(fdb);
return vsiz;
}
/* Get the size of the value of a record in a fixed-length database object. */
int tcfdbvsiz(TCFDB *fdb, int64_t id){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, false)) return false;
if(fdb->fd < 0){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(id == FDBIDMIN){
id = fdb->min;
} else if(id == FDBIDMAX){
id = fdb->max;
}
if(id < 1 || id > fdb->limid){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(!FDBLOCKRECORD(fdb, false, id)){
FDBUNLOCKMETHOD(fdb);
return false;
}
int vsiz;
const void *vbuf = tcfdbgetimpl(fdb, id, &vsiz);
if(!vbuf) vsiz = -1;
FDBUNLOCKRECORD(fdb, id);
FDBUNLOCKMETHOD(fdb);
return vsiz;
}
/* Get the size of the value with a decimal key in a fixed-length database object. */
int tcfdbvsiz2(TCFDB *fdb, const void *kbuf, int ksiz){
assert(fdb && kbuf && ksiz >= 0);
return tcfdbvsiz(fdb, tcfdbkeytoid(kbuf, ksiz));
}
/* Get the size of the string value with a decimal key in a fixed-length database object. */
int tcfdbvsiz3(TCFDB *fdb, const char *kstr){
assert(fdb && kstr);
return tcfdbvsiz(fdb, tcfdbkeytoid(kstr, strlen(kstr)));
}
/* Initialize the iterator of a fixed-length database object. */
bool tcfdbiterinit(TCFDB *fdb){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, true)) return false;
if(fdb->fd < 0){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
bool rv = tcfdbiterinitimpl(fdb);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Get the next ID number of the iterator of a fixed-length database object. */
uint64_t tcfdbiternext(TCFDB *fdb){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, true)) return false;
if(fdb->fd < 0){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
uint64_t rv = tcfdbiternextimpl(fdb);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Get the next decimay key of the iterator of a fixed-length database object. */
void *tcfdbiternext2(TCFDB *fdb, int *sp){
assert(fdb && sp);
uint64_t id = tcfdbiternextimpl(fdb);
if(id < 1) return NULL;
char kbuf[TCNUMBUFSIZ];
int ksiz = sprintf(kbuf, "%llu", (unsigned long long)id);
*sp = ksiz;
return tcmemdup(kbuf, ksiz);
}
/* Get the next decimay key string of the iterator of a fixed-length database object. */
char *tcfdbiternext3(TCFDB *fdb){
assert(fdb);
int ksiz;
return tcfdbiternext2(fdb, &ksiz);
}
/* Get range matching decimal keys in a fixed-length database object. */
uint64_t *tcfdbrange(TCFDB *fdb, int64_t lower, int64_t upper, int max, int *np){
assert(fdb && np);
if(!FDBLOCKMETHOD(fdb, true)) return false;
if(fdb->fd < 0){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
*np = 0;
return tcmalloc(1);
}
if(lower == FDBIDMIN) lower = fdb->min;
if(upper == FDBIDMAX) upper = fdb->max;
if(lower < 1 || lower > fdb->limid || upper < 1 || upper > fdb->limid){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
*np = 0;
return tcmalloc(1);
}
uint64_t *rv = tcfdbrangeimpl(fdb, lower, upper, max, np);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Get range matching decimal keys in a fixed-length database object. */
TCLIST *tcfdbrange2(TCFDB *fdb, const void *lbuf, int lsiz, const void *ubuf, int usiz, int max){
assert(fdb && lbuf && lsiz >= 0 && ubuf && usiz >= 0);
int num;
uint64_t *ids = tcfdbrange(fdb, tcfdbkeytoid(lbuf, lsiz), tcfdbkeytoid(ubuf, usiz), max, &num);
TCLIST *keys = tclistnew2(num);
for(int i = 0; i < num; i++){
char kbuf[TCNUMBUFSIZ];
int ksiz = sprintf(kbuf, "%llu", (unsigned long long)ids[i]);
TCLISTPUSH(keys, kbuf, ksiz);
}
TCFREE(ids);
return keys;
}
/* Get range matching decimal keys with strings in a fixed-length database object. */
TCLIST *tcfdbrange3(TCFDB *fdb, const char *lstr, const char *ustr, int max){
assert(fdb && lstr && ustr);
return tcfdbrange2(fdb, lstr, strlen(lstr), ustr, strlen(ustr), max);
}
/* Get keys with an interval notation in a fixed-length database object. */
TCLIST *tcfdbrange4(TCFDB *fdb, const void *ibuf, int isiz, int max){
assert(fdb && ibuf && isiz >= 0);
char *expr;
TCMEMDUP(expr, ibuf, isiz);
char *pv = expr;
while(*pv > '\0' && *pv <= ' '){
pv++;
}
bool linc = false;
if(*pv == '['){
linc = true;
} else if(*pv != '('){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
TCFREE(expr);
return tclistnew();
}
pv++;
char *sep = strchr(pv, ',');
if(!sep){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
TCFREE(expr);
return tclistnew();
}
*sep = '\0';
tcstrtrim(pv);
int64_t lower = tcfdbkeytoid(pv, strlen(pv));
pv = sep + 1;
bool uinc = false;
if((sep = strchr(pv, ']')) != NULL){
uinc = true;
*sep = '\0';
} else if((sep = strchr(pv, ')')) != NULL){
*sep = '\0';
} else {
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
TCFREE(expr);
return tclistnew();
}
tcstrtrim(pv);
int64_t upper = tcfdbkeytoid(pv, strlen(pv));
if(lower == FDBIDMIN){
lower = fdb->min;
} else if(lower == FDBIDPREV){
lower = fdb->min - 1;
} else if(lower == FDBIDMAX){
lower = fdb->max;
} else if(lower == FDBIDNEXT){
lower = fdb->max + 1;
}
if(!linc) lower++;
if(upper == FDBIDMIN){
upper = fdb->min;
} else if(upper == FDBIDPREV){
upper = fdb->min - 1;
} else if(upper == FDBIDMAX){
upper = fdb->max;
} else if(upper == FDBIDNEXT){
upper = fdb->max + 1;
}
if(!uinc) upper--;
TCFREE(expr);
int num;
uint64_t *ids = tcfdbrange(fdb, lower, upper, max, &num);
TCLIST *keys = tclistnew2(num);
for(int i = 0; i < num; i++){
char kbuf[TCNUMBUFSIZ];
int ksiz = sprintf(kbuf, "%llu", (unsigned long long)ids[i]);
TCLISTPUSH(keys, kbuf, ksiz);
}
TCFREE(ids);
return keys;
}
/* Get keys with an interval notation string in a fixed-length database object. */
TCLIST *tcfdbrange5(TCFDB *fdb, const void *istr, int max){
assert(fdb && istr);
return tcfdbrange4(fdb, istr, strlen(istr), max);
}
/* Add an integer to a record in a fixed-length database object. */
int tcfdbaddint(TCFDB *fdb, int64_t id, int num){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, id < 1)) return INT_MIN;
if(fdb->fd < 0 || !(fdb->omode & FDBOWRITER)){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return INT_MIN;
}
if(id == FDBIDMIN){
id = fdb->min;
} else if(id == FDBIDPREV){
id = fdb->min - 1;
} else if(id == FDBIDMAX){
id = fdb->max;
} else if(id == FDBIDNEXT){
id = fdb->max + 1;
}
if(id < 1 || id > fdb->limid){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return INT_MIN;
}
if(!FDBLOCKRECORD(fdb, true, id)){
FDBUNLOCKMETHOD(fdb);
return INT_MIN;
}
bool rv = tcfdbputimpl(fdb, id, (char *)&num, sizeof(num), FDBPDADDINT);
FDBUNLOCKRECORD(fdb, id);
FDBUNLOCKMETHOD(fdb);
return rv ? num : INT_MIN;
}
/* Add a real number to a record in a fixed-length database object. */
double tcfdbadddouble(TCFDB *fdb, int64_t id, double num){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, id < 1)) return nan("");
if(fdb->fd < 0 || !(fdb->omode & FDBOWRITER)){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return nan("");
}
if(id == FDBIDMIN){
id = fdb->min;
} else if(id == FDBIDPREV){
id = fdb->min - 1;
} else if(id == FDBIDMAX){
id = fdb->max;
} else if(id == FDBIDNEXT){
id = fdb->max + 1;
}
if(id < 1 || id > fdb->limid){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return nan("");
}
if(!FDBLOCKRECORD(fdb, true, id)){
FDBUNLOCKMETHOD(fdb);
return nan("");
}
bool rv = tcfdbputimpl(fdb, id, (char *)&num, sizeof(num), FDBPDADDDBL);
FDBUNLOCKRECORD(fdb, id);
FDBUNLOCKMETHOD(fdb);
return rv ? num : nan("");
}
/* Synchronize updated contents of a fixed-length database object with the file and the device. */
bool tcfdbsync(TCFDB *fdb){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, true)) return false;
if(fdb->fd < 0 || !(fdb->omode & FDBOWRITER) || fdb->tran){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
bool rv = tcfdbmemsync(fdb, true);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Optimize the file of a fixed-length database object. */
bool tcfdboptimize(TCFDB *fdb, int32_t width, int64_t limsiz){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, true)) return false;
if(fdb->fd < 0 || !(fdb->omode & FDBOWRITER) || fdb->tran){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
FDBTHREADYIELD(fdb);
bool rv = tcfdboptimizeimpl(fdb, width, limsiz);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Remove all records of a fixed-length database object. */
bool tcfdbvanish(TCFDB *fdb){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, true)) return false;
if(fdb->fd < 0 || !(fdb->omode & FDBOWRITER) || fdb->tran){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
FDBTHREADYIELD(fdb);
bool rv = tcfdbvanishimpl(fdb);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Copy the database file of a fixed-length database object. */
bool tcfdbcopy(TCFDB *fdb, const char *path){
assert(fdb && path);
if(!FDBLOCKMETHOD(fdb, false)) return false;
if(fdb->fd < 0){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(!FDBLOCKALLRECORDS(fdb, false)){
FDBUNLOCKMETHOD(fdb);
return false;
}
FDBTHREADYIELD(fdb);
bool rv = tcfdbcopyimpl(fdb, path);
FDBUNLOCKALLRECORDS(fdb);
FDBUNLOCKMETHOD(fdb);
return rv;
}
/* Begin the transaction of a fixed-length database object. */
bool tcfdbtranbegin(TCFDB *fdb){
assert(fdb);
for(double wsec = 1.0 / sysconf(_SC_CLK_TCK); true; wsec *= 2){
if(!FDBLOCKMETHOD(fdb, true)) return false;
if(fdb->fd < 0 || !(fdb->omode & FDBOWRITER) || fdb->fatal){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
if(!fdb->tran) break;
FDBUNLOCKMETHOD(fdb);
if(wsec > 1.0) wsec = 1.0;
tcsleep(wsec);
}
if(!tcfdbmemsync(fdb, false)){
FDBUNLOCKMETHOD(fdb);
return false;
}
if((fdb->omode & FDBOTSYNC) && fsync(fdb->fd) == -1){
tcfdbsetecode(fdb, TCESYNC, __FILE__, __LINE__, __func__);
return false;
}
if(fdb->walfd < 0){
char *tpath = tcsprintf("%s%c%s", fdb->path, MYEXTCHR, FDBWALSUFFIX);
int walfd = open(tpath, O_RDWR | O_CREAT | O_TRUNC, FDBFILEMODE);
TCFREE(tpath);
if(walfd < 0){
int ecode = TCEOPEN;
switch(errno){
case EACCES: ecode = TCENOPERM; break;
case ENOENT: ecode = TCENOFILE; break;
case ENOTDIR: ecode = TCENOFILE; break;
}
tcfdbsetecode(fdb, ecode, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
fdb->walfd = walfd;
}
tcfdbsetflag(fdb, FDBFOPEN, false);
if(!tcfdbwalinit(fdb)){
tcfdbsetflag(fdb, FDBFOPEN, true);
FDBUNLOCKMETHOD(fdb);
return false;
}
tcfdbsetflag(fdb, FDBFOPEN, true);
fdb->tran = true;
FDBUNLOCKMETHOD(fdb);
return true;
}
/* Commit the transaction of a fixed-length database object. */
bool tcfdbtrancommit(TCFDB *fdb){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, true)) return false;
if(fdb->fd < 0 || !(fdb->omode & FDBOWRITER) || fdb->fatal || !fdb->tran){
tcfdbsetecode(fdb, TCEINVALID, __FILE__, __LINE__, __func__);
FDBUNLOCKMETHOD(fdb);
return false;
}
bool err = false;
if(!tcfdbmemsync(fdb, fdb->omode & FDBOTSYNC)) err = true;
if(!err && ftruncate(fdb->walfd, 0) == -1){
tcfdbsetecode(fdb, TCETRUNC, __FILE__, __LINE__, __func__);
err = true;
}
fdb->tran = false;
FDBUNLOCKMETHOD(fdb);
return !err;
}
/* Abort the transaction of a fixed-length database object. */
bool tcfdbtranabort(TCFDB *fdb){
assert(fdb);
if(!FDBLOCKMETHOD(fdb, true)) return false;