| 1 |
#include "EXTERN.h" |
| 2 |
#include "perl.h" |
| 3 |
#include "XSUB.h" |
| 4 |
|
| 5 |
/* import some stuff from DBIXS.h and DBI.xs */ |
| 6 |
#define DBIXS_VERSION 93 |
| 7 |
#define DBI_MAGIC '~' |
| 8 |
|
| 9 |
#define DBISTATE_PERLNAME "DBI::_dbistate" |
| 10 |
#define DBISTATE_ADDRSV (perl_get_sv(DBISTATE_PERLNAME, 0x05)) |
| 11 |
#define DBIS_PUBLISHED_LVALUE (*(INT2PTR(dbistate_t**, &SvIVX(DBISTATE_ADDRSV)))) |
| 12 |
|
| 13 |
struct dbistate_st { |
| 14 |
#define DBISTATE_VERSION 94 /* Must change whenever dbistate_t does */ |
| 15 |
/* this must be the first member in structure */ |
| 16 |
void (*check_version) _((const char *name, |
| 17 |
int dbis_cv, int dbis_cs, int need_dbixs_cv, |
| 18 |
int drc_s, int dbc_s, int stc_s, int fdc_s)); |
| 19 |
|
| 20 |
/* version and size are used to check for DBI/DBD version mis-match */ |
| 21 |
U16 version; /* version of this structure */ |
| 22 |
U16 size; |
| 23 |
U16 xs_version; /* version of the overall DBIXS / DBD interface */ |
| 24 |
U16 spare_pad; |
| 25 |
}; |
| 26 |
typedef struct dbistate_st dbistate_t; |
| 27 |
|
| 28 |
#define DBIcf_ACTIVE 0x000004 /* needs finish/disconnect before clear */ |
| 29 |
|
| 30 |
typedef U32 imp_sth; |
| 31 |
|
| 32 |
/* not strictly part of the API... */ |
| 33 |
static imp_sth * |
| 34 |
sth_get_imp (SV *sth) |
| 35 |
{ |
| 36 |
MAGIC *mg = mg_find (SvRV (sth), PERL_MAGIC_tied); |
| 37 |
sth = mg->mg_obj; |
| 38 |
mg = mg_find (SvRV (sth), DBI_MAGIC); |
| 39 |
return (imp_sth *)SvPVX (mg->mg_obj); |
| 40 |
} |
| 41 |
|
| 42 |
#define DBI_STH_ACTIVE(imp) (*(imp) & DBIcf_ACTIVE) |
| 43 |
|
| 44 |
/* end of import section */ |
| 45 |
|
| 46 |
#if (PERL_VERSION < 5) || ((PERL_VERSION == 5) && (PERL_SUBVERSION <= 6)) |
| 47 |
# define get_sv perl_get_sv |
| 48 |
# define call_method perl_call_method |
| 49 |
# define call_sv perl_call_sv |
| 50 |
#endif |
| 51 |
|
| 52 |
#if (PERL_VERSION > 5) || ((PERL_VERSION == 5) && (PERL_SUBVERSION >= 6)) |
| 53 |
# define CAN_UTF8 1 |
| 54 |
#endif |
| 55 |
|
| 56 |
#define MAX_CACHED_STATEMENT_SIZE 2048 |
| 57 |
|
| 58 |
static SV * |
| 59 |
sql_upgrade_utf8 (SV *sv) |
| 60 |
{ |
| 61 |
#if CAN_UTF8 |
| 62 |
if (SvPOK (sv)) |
| 63 |
sv_utf8_upgrade (sv); |
| 64 |
#endif |
| 65 |
return sv; |
| 66 |
} |
| 67 |
|
| 68 |
static SV * |
| 69 |
mortalcopy_and_maybe_force_utf8(int utf8, SV *sv) |
| 70 |
{ |
| 71 |
sv = sv_mortalcopy (sv); |
| 72 |
#if CAN_UTF8 |
| 73 |
if (utf8 && SvPOK (sv)) |
| 74 |
SvUTF8_on (sv); |
| 75 |
#endif |
| 76 |
return sv; |
| 77 |
} |
| 78 |
|
| 79 |
#define maybe_upgrade_utf8(utf8,sv) ((utf8) ? sql_upgrade_utf8 (sv) : (sv)) |
| 80 |
|
| 81 |
#define is_dbh(sv) ((sv) && sv_isobject (sv) && sv_derived_from ((sv), "DBI::db")) |
| 82 |
|
| 83 |
typedef struct lru_node { |
| 84 |
struct lru_node *next; |
| 85 |
struct lru_node *prev; |
| 86 |
U32 hash; /* bit 31 is used to mark active nodes */ |
| 87 |
SV *dbh; |
| 88 |
SV *sql; |
| 89 |
|
| 90 |
SV *sth; |
| 91 |
imp_sth *sth_imp; |
| 92 |
#if 0 /* method cache */ |
| 93 |
GV *execute; |
| 94 |
GV *bind_columns; |
| 95 |
GV *fetch; |
| 96 |
GV *finish; |
| 97 |
#endif |
| 98 |
} lru_node; |
| 99 |
|
| 100 |
static lru_node lru_list; |
| 101 |
static int lru_size; |
| 102 |
static int lru_maxsize; |
| 103 |
|
| 104 |
#define lru_init() lru_list.next = &lru_list; lru_list.prev = &lru_list /* other fields are zero */ |
| 105 |
|
| 106 |
/* this is primitive, yet effective */ |
| 107 |
/* the returned value must never be zero (or bad things will happen) */ |
| 108 |
#define lru_hash \ |
| 109 |
do { \ |
| 110 |
hash = (((U32)(long)dbh)>>4); \ |
| 111 |
hash += *statement; \ |
| 112 |
hash += len; \ |
| 113 |
} while (0) |
| 114 |
|
| 115 |
/* fetch and "use" */ |
| 116 |
/* could be done using a single call (we could call prepare!) */ |
| 117 |
static SV * |
| 118 |
lru_fetch (SV *dbh, SV *sql) |
| 119 |
{ |
| 120 |
lru_node *n; |
| 121 |
|
| 122 |
U32 hash; |
| 123 |
STRLEN len; |
| 124 |
char *statement = SvPV (sql, len); |
| 125 |
|
| 126 |
dbh = SvRV (dbh); |
| 127 |
|
| 128 |
lru_hash; |
| 129 |
|
| 130 |
n = &lru_list; |
| 131 |
do { |
| 132 |
n = n->next; |
| 133 |
|
| 134 |
if (!n->hash) |
| 135 |
return 0; |
| 136 |
} while (n->hash != hash |
| 137 |
|| DBI_STH_ACTIVE (n->sth_imp) |
| 138 |
|| !sv_eq (n->sql, sql) |
| 139 |
|| n->dbh != dbh); |
| 140 |
|
| 141 |
/* found, so return to the start of the list */ |
| 142 |
n->prev->next = n->next; |
| 143 |
n->next->prev = n->prev; |
| 144 |
|
| 145 |
n->next = lru_list.next; |
| 146 |
n->prev = &lru_list; |
| 147 |
lru_list.next->prev = n; |
| 148 |
lru_list.next = n; |
| 149 |
|
| 150 |
return sv_2mortal (SvREFCNT_inc (n->sth)); |
| 151 |
} |
| 152 |
|
| 153 |
static void |
| 154 |
lru_trim (void) |
| 155 |
{ |
| 156 |
while (lru_size > lru_maxsize) |
| 157 |
{ |
| 158 |
/* nuke at the end */ |
| 159 |
lru_node *n = lru_list.prev; |
| 160 |
|
| 161 |
n = lru_list.prev; |
| 162 |
|
| 163 |
lru_list.prev = n->prev; |
| 164 |
n->prev->next = &lru_list; |
| 165 |
|
| 166 |
SvREFCNT_dec (n->dbh); |
| 167 |
SvREFCNT_dec (n->sql); |
| 168 |
SvREFCNT_dec (n->sth); |
| 169 |
Safefree (n); |
| 170 |
|
| 171 |
lru_size--; |
| 172 |
} |
| 173 |
} |
| 174 |
|
| 175 |
/* store a not-yet existing entry(!) */ |
| 176 |
static void |
| 177 |
lru_store (SV *dbh, SV *sql, SV *sth) |
| 178 |
{ |
| 179 |
lru_node *n; |
| 180 |
U32 hash; |
| 181 |
STRLEN len; |
| 182 |
char *statement; |
| 183 |
|
| 184 |
if (!lru_maxsize) |
| 185 |
return; |
| 186 |
|
| 187 |
statement = SvPV (sql, len); |
| 188 |
dbh = SvRV (dbh); |
| 189 |
|
| 190 |
lru_hash; |
| 191 |
|
| 192 |
lru_size++; |
| 193 |
lru_trim (); |
| 194 |
|
| 195 |
New (0, n, 1, lru_node); |
| 196 |
|
| 197 |
n->hash = hash; |
| 198 |
n->dbh = dbh; SvREFCNT_inc (dbh); /* note: this is the dbi hash itself, not the reference */ |
| 199 |
n->sql = newSVsv (sql); |
| 200 |
n->sth = sth; SvREFCNT_inc (sth); |
| 201 |
n->sth_imp = sth_get_imp (sth); |
| 202 |
|
| 203 |
n->next = lru_list.next; |
| 204 |
n->prev = &lru_list; |
| 205 |
lru_list.next->prev = n; |
| 206 |
lru_list.next = n; |
| 207 |
} |
| 208 |
|
| 209 |
static void |
| 210 |
lru_cachesize (int size) |
| 211 |
{ |
| 212 |
if (size >= 0) |
| 213 |
{ |
| 214 |
lru_maxsize = size; |
| 215 |
lru_trim (); |
| 216 |
} |
| 217 |
} |
| 218 |
|
| 219 |
static GV *sql_exec; |
| 220 |
static GV *DBH; |
| 221 |
static SV *sv_prepare, *sv_execute, *sv_bind_columns, |
| 222 |
*sv_fetchrow_arrayref, *sv_fetchall_arrayref, |
| 223 |
*sv_finish; |
| 224 |
|
| 225 |
#define newconstpv(str) newSVpvn ((str), sizeof (str)) |
| 226 |
|
| 227 |
MODULE = PApp::SQL PACKAGE = PApp::SQL |
| 228 |
|
| 229 |
PROTOTYPES: DISABLE |
| 230 |
|
| 231 |
BOOT: |
| 232 |
{ |
| 233 |
struct dbistate_st *dbis = DBIS_PUBLISHED_LVALUE; |
| 234 |
|
| 235 |
/* this is atcually wrong, we should call the check member, apparently */ |
| 236 |
assert (dbis->version == DBISTATE_VERSION); |
| 237 |
assert (dbis->xs_version == DBIXS_VERSION); |
| 238 |
|
| 239 |
sql_exec = gv_fetchpv ("PApp::SQL::sql_exec", TRUE, SVt_PV); |
| 240 |
DBH = gv_fetchpv ("PApp::SQL::DBH" , TRUE, SVt_PV); |
| 241 |
|
| 242 |
if (!sv_prepare) |
| 243 |
{ |
| 244 |
sv_prepare = newconstpv ("prepare"); |
| 245 |
sv_execute = newconstpv ("execute"); |
| 246 |
sv_bind_columns = newconstpv ("bind_columns"); |
| 247 |
sv_fetchrow_arrayref = newconstpv ("fetchrow_arrayref"); |
| 248 |
sv_fetchall_arrayref = newconstpv ("fetchall_arrayref"); |
| 249 |
sv_finish = newconstpv ("finish"); |
| 250 |
} |
| 251 |
|
| 252 |
/* apache might BOOT: twice :( */ |
| 253 |
if (lru_size) |
| 254 |
lru_cachesize (0); |
| 255 |
|
| 256 |
lru_init (); |
| 257 |
lru_cachesize (50); |
| 258 |
} |
| 259 |
|
| 260 |
int |
| 261 |
cachesize(size = -1) |
| 262 |
int size |
| 263 |
CODE: |
| 264 |
RETVAL = lru_maxsize; |
| 265 |
lru_cachesize (size); |
| 266 |
OUTPUT: |
| 267 |
RETVAL |
| 268 |
|
| 269 |
void |
| 270 |
sql_exec(...) |
| 271 |
ALIAS: |
| 272 |
sql_uexec = 1 |
| 273 |
sql_fetch = 2 |
| 274 |
sql_ufetch = 3 |
| 275 |
sql_fetchall = 4 |
| 276 |
sql_ufetchall = 5 |
| 277 |
sql_exists = 6 |
| 278 |
sql_uexists = 7 |
| 279 |
PPCODE: |
| 280 |
{ |
| 281 |
if (items == 0) |
| 282 |
croak ("Usage: sql_exec [database-handle,] [bind-var-refs,... ] \"sql-statement\", [arguments, ...]"); |
| 283 |
else |
| 284 |
{ |
| 285 |
int arg = 0; |
| 286 |
int bind_first, bind_last; |
| 287 |
int count; |
| 288 |
SV *dbh = ST(0); |
| 289 |
SV *sth; |
| 290 |
SV *sql; |
| 291 |
SV *execute; |
| 292 |
STRLEN dc, dd; /* dummy */ |
| 293 |
|
| 294 |
/* save our arguments against destruction through function calls */ |
| 295 |
SP += items; |
| 296 |
|
| 297 |
/* first check wether we should use an explicit db handle */ |
| 298 |
if (!is_dbh (dbh)) |
| 299 |
{ |
| 300 |
/* the next line doesn't work - check why later maybe */ |
| 301 |
/* dbh = get_sv ("DBH", FALSE); |
| 302 |
if (!is_dbh (dbh)) |
| 303 |
{*/ |
| 304 |
dbh = GvSV (DBH); |
| 305 |
if (!is_dbh (dbh)) |
| 306 |
croak ("sql_exec: no $DBH argument and no fallback in $PApp::SQL::DBH"); |
| 307 |
/*croak ("sql_exec: no $DBH found in current package or in PApp::SQL::"); |
| 308 |
}*/ |
| 309 |
} |
| 310 |
else |
| 311 |
arg++; /* we consumed one argument */ |
| 312 |
|
| 313 |
/* be more Coro-friendly by keeping a copy, so different threads */ |
| 314 |
/* can replace their global handles */ |
| 315 |
dbh = sv_2mortal (newSVsv (dbh)); |
| 316 |
|
| 317 |
/* count the remaining references (for bind_columns) */ |
| 318 |
bind_first = arg; |
| 319 |
while (items > arg && SvROK (ST(arg))) |
| 320 |
arg++; |
| 321 |
|
| 322 |
bind_last = arg; |
| 323 |
|
| 324 |
/* consume the sql-statement itself */ |
| 325 |
if (items <= arg) |
| 326 |
croak ("sql_exec: required argument \"sql-statement\" missing"); |
| 327 |
|
| 328 |
if (!SvPOK (ST(arg))) |
| 329 |
croak ("sql_exec: sql-statement must be a string"); |
| 330 |
|
| 331 |
sql = ST(arg); arg++; |
| 332 |
|
| 333 |
if ((ix & ~1) == 6) |
| 334 |
{ |
| 335 |
SV *neu = sv_2mortal (newSVpv ("select count(*) > 0 from ", 0)); |
| 336 |
sv_catsv (neu, sql); |
| 337 |
sv_catpv (neu, " limit 1"); |
| 338 |
sql = neu; |
| 339 |
ix -= 4; /* sql_fetch */ |
| 340 |
} |
| 341 |
|
| 342 |
/* check cache for existing statement handle */ |
| 343 |
sth = lru_fetch (dbh, sql); |
| 344 |
if (!sth) |
| 345 |
{ |
| 346 |
PUSHMARK (SP); |
| 347 |
EXTEND (SP, 2); |
| 348 |
PUSHs (dbh); |
| 349 |
PUSHs (sql); |
| 350 |
PUTBACK; |
| 351 |
count = call_sv (sv_prepare, G_METHOD | G_SCALAR); |
| 352 |
SPAGAIN; |
| 353 |
|
| 354 |
if (count != 1) |
| 355 |
croak ("sql_exec: unable to prepare() statement '%s': %s", |
| 356 |
SvPV (sql, dc), |
| 357 |
SvPV (get_sv ("DBI::errstr", TRUE), dd)); |
| 358 |
|
| 359 |
sth = POPs; |
| 360 |
|
| 361 |
if (SvLEN (sql) < MAX_CACHED_STATEMENT_SIZE) |
| 362 |
lru_store (dbh, sql, sth); |
| 363 |
} |
| 364 |
|
| 365 |
PUSHMARK (SP); |
| 366 |
EXTEND (SP, items - arg + 1); |
| 367 |
PUSHs (sth); |
| 368 |
while (items > arg) |
| 369 |
{ |
| 370 |
SV *sv = ST(arg); |
| 371 |
/* we sv_mortalcopy magical values since DBI seems to have a memory |
| 372 |
* leak when magical values are passed into execute(). |
| 373 |
*/ |
| 374 |
PUSHs (maybe_upgrade_utf8 (ix & 1, SvMAGICAL(sv) ? sv_mortalcopy(sv) : sv)); |
| 375 |
arg++; |
| 376 |
} |
| 377 |
|
| 378 |
PUTBACK; |
| 379 |
/* { static GV *execute; |
| 380 |
if (!execute) execute = gv_fetchmethod_autoload(SvSTASH(SvRV(sth)), "execute", 0); |
| 381 |
count = call_sv(GvCV(execute), G_SCALAR); |
| 382 |
}*/ |
| 383 |
count = call_sv (sv_execute, G_METHOD | G_SCALAR); |
| 384 |
SPAGAIN; |
| 385 |
|
| 386 |
if (count != 1) |
| 387 |
croak ("sql_exec: execute() didn't return any value ('%s'): %s", |
| 388 |
SvPV (sql, dc), |
| 389 |
SvPV (get_sv ("DBI::errstr", TRUE), dd)); |
| 390 |
|
| 391 |
execute = POPs; |
| 392 |
|
| 393 |
if (!SvTRUE (execute)) |
| 394 |
croak ("sql_exec: unable to execute statement '%s' (%s)", |
| 395 |
SvPV (sql, dc), |
| 396 |
SvPV (get_sv ("DBI::errstr", TRUE), dd)); |
| 397 |
|
| 398 |
sv_setsv (GvSV(sql_exec), execute); |
| 399 |
|
| 400 |
if (bind_first != bind_last) |
| 401 |
{ |
| 402 |
PUSHMARK (SP); |
| 403 |
EXTEND (SP, bind_last - bind_first + 2); |
| 404 |
PUSHs (sth); |
| 405 |
do { |
| 406 |
#if CAN_UTF8 |
| 407 |
if (ix & 1) |
| 408 |
SvUTF8_on (SvRV(ST(bind_first))); |
| 409 |
#endif |
| 410 |
PUSHs (ST(bind_first)); |
| 411 |
bind_first++; |
| 412 |
} while (bind_first != bind_last); |
| 413 |
|
| 414 |
PUTBACK; |
| 415 |
count = call_sv (sv_bind_columns, G_METHOD | G_SCALAR); |
| 416 |
SPAGAIN; |
| 417 |
|
| 418 |
if (count != 1) |
| 419 |
croak ("sql_exec: bind_columns() didn't return any value ('%s'): %s", |
| 420 |
SvPV (sql, dc), |
| 421 |
SvPV (get_sv ("DBI::errstr", TRUE), dd)); |
| 422 |
|
| 423 |
if (!SvOK (TOPs)) |
| 424 |
croak ("sql_exec: bind_columns() didn't return a true ('%s'): %s", |
| 425 |
SvPV (sql, dc), |
| 426 |
SvPV (get_sv ("DBI::errstr", TRUE), dd)); |
| 427 |
|
| 428 |
POPs; |
| 429 |
} |
| 430 |
|
| 431 |
/* restore our arguments again */ |
| 432 |
SP -= items; |
| 433 |
|
| 434 |
if ((ix & ~1) == 2) |
| 435 |
{ /* sql_fetch */ |
| 436 |
SV *row; |
| 437 |
|
| 438 |
PUSHMARK (SP); |
| 439 |
XPUSHs (sth); |
| 440 |
PUTBACK; |
| 441 |
count = call_sv (sv_fetchrow_arrayref, G_METHOD | G_SCALAR); |
| 442 |
SPAGAIN; |
| 443 |
|
| 444 |
if (count != 1) |
| 445 |
abort (); |
| 446 |
|
| 447 |
row = POPs; |
| 448 |
|
| 449 |
if (SvROK (row)) |
| 450 |
{ |
| 451 |
AV *av; |
| 452 |
|
| 453 |
switch (GIMME_V) |
| 454 |
{ |
| 455 |
case G_VOID: |
| 456 |
/* no thing */ |
| 457 |
break; |
| 458 |
case G_SCALAR: |
| 459 |
/* the first element */ |
| 460 |
XPUSHs (mortalcopy_and_maybe_force_utf8 (ix & 1, *av_fetch ((AV *)SvRV (row), 0, 1))); |
| 461 |
break; |
| 462 |
case G_ARRAY: |
| 463 |
av = (AV *)SvRV (row); |
| 464 |
count = AvFILL (av) + 1; |
| 465 |
EXTEND (SP, count); |
| 466 |
for (arg = 0; arg < count; arg++) |
| 467 |
PUSHs (mortalcopy_and_maybe_force_utf8 (ix & 1, AvARRAY (av)[arg])); |
| 468 |
|
| 469 |
break; |
| 470 |
default: |
| 471 |
abort (); |
| 472 |
} |
| 473 |
} |
| 474 |
} |
| 475 |
else if ((ix & ~1) == 4) |
| 476 |
{ /* sql_fetchall */ |
| 477 |
SV *rows; |
| 478 |
|
| 479 |
PUSHMARK (SP); |
| 480 |
XPUSHs (sth); |
| 481 |
PUTBACK; |
| 482 |
count = call_sv (sv_fetchall_arrayref, G_METHOD | G_SCALAR); |
| 483 |
SPAGAIN; |
| 484 |
|
| 485 |
if (count != 1) |
| 486 |
abort (); |
| 487 |
|
| 488 |
rows = POPs; |
| 489 |
|
| 490 |
if (SvROK (rows)) |
| 491 |
{ |
| 492 |
AV *av = (AV *)SvRV (rows); |
| 493 |
count = AvFILL (av) + 1; |
| 494 |
|
| 495 |
if (count) |
| 496 |
{ |
| 497 |
int columns = AvFILL ((AV *) SvRV (AvARRAY (av)[0])) + 1; /* columns? */ |
| 498 |
|
| 499 |
EXTEND (SP, count); |
| 500 |
if (columns == 1) |
| 501 |
for (arg = 0; arg < count; arg++) |
| 502 |
PUSHs (mortalcopy_and_maybe_force_utf8 (ix & 1, AvARRAY ((AV *)SvRV (AvARRAY (av)[arg]))[0])); |
| 503 |
else |
| 504 |
for (arg = 0; arg < count; arg++) |
| 505 |
PUSHs (mortalcopy_and_maybe_force_utf8 (ix & 1, AvARRAY (av)[arg])); |
| 506 |
} |
| 507 |
} |
| 508 |
} |
| 509 |
else |
| 510 |
XPUSHs (sth); |
| 511 |
|
| 512 |
if (ix > 1 || GIMME_V == G_VOID) |
| 513 |
{ |
| 514 |
PUSHMARK (SP); |
| 515 |
XPUSHs (sth); |
| 516 |
PUTBACK; |
| 517 |
(void) call_sv (sv_finish, G_METHOD | G_DISCARD); |
| 518 |
SPAGAIN; |
| 519 |
} |
| 520 |
} |
| 521 |
} |
| 522 |
|
| 523 |
|
| 524 |
|
