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Commit9295eea

Browse files
committed
Document ATAPI FLUSH CACHE EXT.
1 parentc685b94 commit9295eea

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2 files changed

+137
-17
lines changed

2 files changed

+137
-17
lines changed

‎doc/src/sgml/wal.sgml

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.63 2010/02/2701:39:46 momjian Exp $ -->
1+
<!-- $PostgreSQL: pgsql/doc/src/sgml/wal.sgml,v 1.64 2010/02/2720:16:17 momjian Exp $ -->
22

33
<chapter id="wal">
44
<title>Reliability and the Write-Ahead Log</title>
@@ -60,7 +60,7 @@
6060
exist for disk controller caches. Consumer-grade IDE and SATA drives are
6161
particularly likely to have write-back caches that will not survive a
6262
power failure, though <acronym>ATAPI-6</> introduced a drive cache
63-
flush command that some file systems use, e.g. <acronym>ZFS</>.
63+
flush command(FLUSH CACHE EXT)that some file systems use, e.g. <acronym>ZFS</>.
6464
Many solid-state drives also have volatile write-back
6565
caches, and many do not honor cache flush commands by default.
6666
To check write caching on <productname>Linux</> use

‎src/backend/utils/adt/pg_locale.c

Lines changed: 135 additions & 15 deletions
Original file line numberDiff line numberDiff line change
@@ -4,7 +4,7 @@
44
*
55
* Portions Copyright (c) 2002-2010, PostgreSQL Global Development Group
66
*
7-
* $PostgreSQL: pgsql/src/backend/utils/adt/pg_locale.c,v 1.51 2010/01/0216:57:54 momjian Exp $
7+
* $PostgreSQL: pgsql/src/backend/utils/adt/pg_locale.c,v 1.52 2010/02/27 20:16:17 momjian Exp $
88
*
99
*-----------------------------------------------------------------------
1010
*/
@@ -386,6 +386,70 @@ free_struct_lconv(struct lconv * s)
386386
free(s->positive_sign);
387387
}
388388

389+
#ifdefWIN32
390+
staticchar*db_strdup(constchar*item,constchar*str)
391+
{
392+
intdb_encoding=GetDatabaseEncoding();
393+
size_twchars,ilen,wclen,dstlen;
394+
intutflen,bytes_per_char;
395+
wchar_t*wbuf;
396+
char*dst;
397+
398+
if (!str[0])
399+
returnstrdup(str);
400+
ilen=strlen(str)+1;
401+
wclen=ilen*sizeof(wchar_t);
402+
wbuf= (wchar_t*)palloc(wclen);
403+
404+
/* convert multi-byte string to a wide-character string */
405+
wchars=mbstowcs(wbuf,str,ilen);
406+
if (wchars== (size_t)-1)
407+
elog(ERROR,
408+
"could not convert string to wide characters: error %lu",GetLastError());
409+
410+
/* allocate target string */
411+
bytes_per_char=pg_encoding_max_length(PG_UTF8);
412+
if (pg_encoding_max_length(db_encoding)>bytes_per_char)
413+
bytes_per_char=pg_encoding_max_length(db_encoding);
414+
dstlen=wchars*bytes_per_char+1;
415+
if ((dst=malloc(dstlen))==NULL)
416+
elog(ERROR,"could not allocate a destination buffer");
417+
418+
/* Convert wide string to UTF8 */
419+
utflen=WideCharToMultiByte(CP_UTF8,0,wbuf,wchars,dst,dstlen,NULL,NULL);
420+
if (utflen==0)
421+
elog(ERROR,
422+
"could not convert string %04x to UTF-8: error %lu",wbuf[0],GetLastError());
423+
pfree(wbuf);
424+
425+
dst[utflen]='\0';
426+
if (db_encoding!=PG_UTF8)
427+
{
428+
PG_TRY();
429+
{
430+
char*convstr=pg_do_encoding_conversion(dst,utflen,PG_UTF8,db_encoding);
431+
if (dst!=convstr)
432+
{
433+
strlcpy(dst,convstr,dstlen);
434+
pfree(convstr);
435+
}
436+
}
437+
PG_CATCH();
438+
{
439+
FlushErrorState();
440+
dst[0]='\0';
441+
}
442+
PG_END_TRY();
443+
}
444+
445+
returndst;
446+
}
447+
#else
448+
staticchar*db_strdup(constchar*item,constchar*str)
449+
{
450+
returnstrdup(str);
451+
}
452+
#endif/* WIN32 */
389453

390454
/*
391455
* Return the POSIX lconv struct (contains number/money formatting
@@ -398,6 +462,9 @@ PGLC_localeconv(void)
398462
structlconv*extlconv;
399463
char*save_lc_monetary;
400464
char*save_lc_numeric;
465+
#ifdefWIN32
466+
char*save_lc_ctype=NULL;
467+
#endif
401468

402469
/* Did we do it already? */
403470
if (CurrentLocaleConvValid)
@@ -413,30 +480,83 @@ PGLC_localeconv(void)
413480
if (save_lc_numeric)
414481
save_lc_numeric=pstrdup(save_lc_numeric);
415482

416-
setlocale(LC_MONETARY,locale_monetary);
417-
setlocale(LC_NUMERIC,locale_numeric);
483+
#ifdefWIN32
484+
/*
485+
*WIN32 returns an inaccurately encoded symbol, e.g. Euro,
486+
*when the LC_CTYPE does not match the numeric or monetary
487+
*lc types, so we switch to matching LC_CTYPEs as we access them.
488+
*/
489+
490+
if ((save_lc_ctype=setlocale(LC_CTYPE,NULL))!=NULL)
491+
{
492+
/* Save for later restore */
493+
save_lc_ctype=pstrdup(save_lc_ctype);
494+
495+
/* Set LC_CTYPE to match LC_MONETARY? */
496+
if (pg_strcasecmp(save_lc_ctype,locale_monetary)!=0)
497+
setlocale(LC_CTYPE,locale_monetary);
498+
}
499+
else
500+
/* LC_CTYPE not set, unconditionally set it */
501+
setlocale(LC_CTYPE,locale_monetary);
418502

419-
/* Get formatting information */
503+
/*
504+
*If LC_NUMERIC and LC_MONETARY match, we can set it now and
505+
*avoid a second localeconv() call.
506+
*/
507+
if (pg_strcasecmp(locale_numeric,locale_monetary)==0)
508+
#else
509+
setlocale(LC_NUMERIC,locale_numeric);
510+
#endif
511+
512+
setlocale(LC_MONETARY,locale_monetary);
513+
/*
514+
*Get formatting information for LC_MONETARY, and LC_NUMERIC if they
515+
*are the same.
516+
*/
420517
extlconv=localeconv();
421518

422519
/*
423-
* Must copy all values since restoring internal settingsmay overwrite
520+
* Must copy all values since restoring internal settingsmight overwrite
424521
* localeconv()'s results.
425522
*/
426523
CurrentLocaleConv=*extlconv;
427-
CurrentLocaleConv.currency_symbol=strdup(extlconv->currency_symbol);
428-
CurrentLocaleConv.decimal_point=strdup(extlconv->decimal_point);
429-
CurrentLocaleConv.grouping=strdup(extlconv->grouping);
430-
CurrentLocaleConv.thousands_sep=strdup(extlconv->thousands_sep);
431-
CurrentLocaleConv.int_curr_symbol=strdup(extlconv->int_curr_symbol);
432-
CurrentLocaleConv.mon_decimal_point=strdup(extlconv->mon_decimal_point);
524+
525+
/* The first argument of db_strdup() is only used on WIN32 */
526+
CurrentLocaleConv.currency_symbol=db_strdup("currency_symbol",extlconv->currency_symbol);
527+
CurrentLocaleConv.int_curr_symbol=db_strdup("int_curr_symbol",extlconv->int_curr_symbol);
528+
CurrentLocaleConv.mon_decimal_point=db_strdup("mon_decimal_point",extlconv->mon_decimal_point);
433529
CurrentLocaleConv.mon_grouping=strdup(extlconv->mon_grouping);
434-
CurrentLocaleConv.mon_thousands_sep=strdup(extlconv->mon_thousands_sep);
435-
CurrentLocaleConv.negative_sign=strdup(extlconv->negative_sign);
436-
CurrentLocaleConv.positive_sign=strdup(extlconv->positive_sign);
530+
CurrentLocaleConv.mon_thousands_sep=db_strdup("mon_thousands_sep",extlconv->mon_thousands_sep);
531+
CurrentLocaleConv.negative_sign=db_strdup("negative_sign",extlconv->negative_sign);
532+
CurrentLocaleConv.positive_sign=db_strdup("positive_sign",extlconv->positive_sign);
437533
CurrentLocaleConv.n_sign_posn=extlconv->n_sign_posn;
438534

439-
/* Try to restore internal settings */
535+
#ifdefWIN32
536+
/* Do we need to change LC_CTYPE to match LC_NUMERIC? */
537+
if (pg_strcasecmp(locale_numeric,locale_monetary)!=0)
538+
{
539+
setlocale(LC_CTYPE,locale_numeric);
540+
setlocale(LC_NUMERIC,locale_numeric);
541+
/* Get formatting information for LC_NUMERIC */
542+
extlconv=localeconv();
543+
}
544+
#endif
545+
546+
CurrentLocaleConv.decimal_point=db_strdup("decimal_point",extlconv->decimal_point);
547+
CurrentLocaleConv.grouping=strdup(extlconv->grouping);
548+
CurrentLocaleConv.thousands_sep=db_strdup("thousands_sep",extlconv->thousands_sep);
549+
550+
/*
551+
*Restore internal settings
552+
*/
553+
#ifdefWIN32
554+
if (save_lc_ctype)
555+
{
556+
setlocale(LC_CTYPE,save_lc_ctype);
557+
pfree(save_lc_ctype);
558+
}
559+
#endif
440560
if (save_lc_monetary)
441561
{
442562
setlocale(LC_MONETARY,save_lc_monetary);

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