ecpglib attempts to force the LC_NUMERIC locale to "C" while reading
server output, to avoid problems with strtod() and related functions.
Historically it's just issued setlocale() calls to do that, but that
has major problems if we're in a threaded application. setlocale()
itself is not required by POSIX to be thread-safe (and indeed is not,
on recent OpenBSD). Moreover, its effects are process-wide, so that
we could cause unexpected results in other threads, or another thread
could change our setting.
On platforms having uselocale(), which is required by POSIX:2008,
we can avoid these problems by using uselocale() instead. Windows
goes its own way as usual, but we can make it safe by using
_configthreadlocale(). Platforms having neither continue to use the
old code, but that should be pretty much nobody among current systems.
(Subsequent buildfarm results show that recent NetBSD versions still
lack uselocale(), but it's not a big problem because they also do not
support non-"C" settings for LC_NUMERIC.)
Back-patch of commits
8eb4a9312 and
ee27584c4.
Michael Meskes and Tom Lane; thanks also to Takayuki Tsunakawa.
Discussion: https://postgr.es/m/31420.
1547783697@sss.pgh.pa.us
LIBS_including_readline="$LIBS"
LIBS=`echo "$LIBS" | sed -e 's/-ledit//g' -e 's/-lreadline//g'`
-for ac_func in cbrt dlopen fdatasync getifaddrs getpeerucred getrlimit mbstowcs_l memmove poll posix_fallocate pstat pthread_is_threaded_np readlink setproctitle setsid shm_open symlink sync_file_range towlower utime utimes wcstombs wcstombs_l
+for ac_func in cbrt dlopen fdatasync getifaddrs getpeerucred getrlimit mbstowcs_l memmove poll posix_fallocate pstat pthread_is_threaded_np readlink setproctitle setsid shm_open symlink sync_file_range towlower uselocale utime utimes wcstombs wcstombs_l
do :
as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
# Win32 (really MinGW) support
if test "$PORTNAME" = "win32"; then
+ for ac_func in _configthreadlocale
+do :
+ ac_fn_c_check_func "$LINENO" "_configthreadlocale" "ac_cv_func__configthreadlocale"
+if test "x$ac_cv_func__configthreadlocale" = xyes; then :
+ cat >>confdefs.h <<_ACEOF
+#define HAVE__CONFIGTHREADLOCALE 1
+_ACEOF
+
+fi
+done
+
ac_fn_c_check_func "$LINENO" "gettimeofday" "ac_cv_func_gettimeofday"
if test "x$ac_cv_func_gettimeofday" = xyes; then :
$as_echo "#define HAVE_GETTIMEOFDAY 1" >>confdefs.h
LIBS_including_readline="$LIBS"
LIBS=`echo "$LIBS" | sed -e 's/-ledit//g' -e 's/-lreadline//g'`
-AC_CHECK_FUNCS([cbrt dlopen fdatasync getifaddrs getpeerucred getrlimit mbstowcs_l memmove poll posix_fallocate pstat pthread_is_threaded_np readlink setproctitle setsid shm_open symlink sync_file_range towlower utime utimes wcstombs wcstombs_l])
+AC_CHECK_FUNCS(m4_normalize([
+ cbrt
+ dlopen
+ fdatasync
+ getifaddrs
+ getpeerucred
+ getrlimit
+ mbstowcs_l
+ memmove
+ poll
+ posix_fallocate
+ pstat
+ pthread_is_threaded_np
+ readlink
+ setproctitle
+ setsid
+ shm_open
+ symlink
+ sync_file_range
+ towlower
+ uselocale
+ utime
+ utimes
+ wcstombs
+ wcstombs_l
+]))
AC_REPLACE_FUNCS(fseeko)
case $host_os in
# Win32 (really MinGW) support
if test "$PORTNAME" = "win32"; then
+ AC_CHECK_FUNCS(_configthreadlocale)
AC_REPLACE_FUNCS(gettimeofday)
AC_LIBOBJ(dirmod)
AC_LIBOBJ(kill)
/* Define to 1 if the system has the type `unsigned long long int'. */
#undef HAVE_UNSIGNED_LONG_LONG_INT
+/* Define to 1 if you have the `uselocale' function. */
+#undef HAVE_USELOCALE
+
/* Define to 1 if you have the `utime' function. */
#undef HAVE_UTIME
/* Define to 1 if your compiler understands __builtin_unreachable. */
#undef HAVE__BUILTIN_UNREACHABLE
+/* Define to 1 if you have the `_configthreadlocale' function. */
+#undef HAVE__CONFIGTHREADLOCALE
+
/* Define to 1 if you have __cpuid. */
#undef HAVE__CPUID
/* Define to 1 if you have the `unsetenv' function. */
/* #undef HAVE_UNSETENV */
+/* Define to 1 if you have the `uselocale' function. */
+/* #undef HAVE_USELOCALE */
+
/* Define to 1 if you have the `utime' function. */
#define HAVE_UTIME 1
/* Define to 1 if your compiler understands __builtin_unreachable. */
/* #undef HAVE__BUILTIN_UNREACHABLE */
+/* Define to 1 if you have the `_configthreadlocale' function. */
+#define HAVE__CONFIGTHREADLOCALE 1
+
/* Define to 1 if you have __cpuid. */
#define HAVE__CPUID 1
if (data_var.type != ECPGt_EORT)
{
struct statement stmt;
- char *oldlocale;
+
+ memset(&stmt, 0, sizeof stmt);
+ stmt.lineno = lineno;
/* Make sure we do NOT honor the locale for numeric input */
/* since the database gives the standard decimal point */
- oldlocale = ecpg_strdup(setlocale(LC_NUMERIC, NULL), lineno);
+ /* (see comments in execute.c) */
+#ifdef HAVE_USELOCALE
+ stmt.clocale = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
+ if (stmt.clocale != (locale_t) 0)
+ stmt.oldlocale = uselocale(stmt.clocale);
+#else
+#ifdef HAVE__CONFIGTHREADLOCALE
+ stmt.oldthreadlocale = _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
+#endif
+ stmt.oldlocale = ecpg_strdup(setlocale(LC_NUMERIC, NULL), lineno);
setlocale(LC_NUMERIC, "C");
-
- memset(&stmt, 0, sizeof stmt);
- stmt.lineno = lineno;
+#endif
/* desperate try to guess something sensible */
stmt.connection = ecpg_get_connection(NULL);
ecpg_store_result(ECPGresult, index, &stmt, &data_var);
- setlocale(LC_NUMERIC, oldlocale);
- ecpg_free(oldlocale);
+#ifdef HAVE_USELOCALE
+ if (stmt.oldlocale != (locale_t) 0)
+ uselocale(stmt.oldlocale);
+ if (stmt.clocale)
+ freelocale(stmt.clocale);
+#else
+ if (stmt.oldlocale)
+ {
+ setlocale(LC_NUMERIC, stmt.oldlocale);
+ ecpg_free(stmt.oldlocale);
+ }
+#ifdef HAVE__CONFIGTHREADLOCALE
+ if (stmt.oldthreadlocale != -1)
+ _configthreadlocale(stmt.oldthreadlocale);
+#endif
+#endif
}
else if (data_var.ind_type != ECPGt_NO_INDICATOR && data_var.ind_pointer != NULL)
free_variable(stmt->outlist);
ecpg_free(stmt->command);
ecpg_free(stmt->name);
+#ifdef HAVE_USELOCALE
+ if (stmt->clocale)
+ freelocale(stmt->clocale);
+#else
ecpg_free(stmt->oldlocale);
+#endif
ecpg_free(stmt);
}
/*
* Make sure we do NOT honor the locale for numeric input/output since the
- * database wants the standard decimal point
+ * database wants the standard decimal point. If available, use
+ * uselocale() for this because it's thread-safe. Windows doesn't have
+ * that, but it usually does have _configthreadlocale().
*/
+#ifdef HAVE_USELOCALE
+ stmt->clocale = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
+ if (stmt->clocale == (locale_t) 0)
+ {
+ ecpg_do_epilogue(stmt);
+ return false;
+ }
+ stmt->oldlocale = uselocale(stmt->clocale);
+ if (stmt->oldlocale == (locale_t) 0)
+ {
+ ecpg_do_epilogue(stmt);
+ return false;
+ }
+#else
+#ifdef HAVE__CONFIGTHREADLOCALE
+ stmt->oldthreadlocale = _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
+ if (stmt->oldthreadlocale == -1)
+ {
+ ecpg_do_epilogue(stmt);
+ return false;
+ }
+#endif
stmt->oldlocale = ecpg_strdup(setlocale(LC_NUMERIC, NULL), lineno);
if (stmt->oldlocale == NULL)
{
return false;
}
setlocale(LC_NUMERIC, "C");
+#endif
#ifdef ENABLE_THREAD_SAFETY
ecpg_pthreads_init();
if (stmt == NULL)
return;
+#ifdef HAVE_USELOCALE
+ if (stmt->oldlocale != (locale_t) 0)
+ uselocale(stmt->oldlocale);
+#else
if (stmt->oldlocale)
+ {
setlocale(LC_NUMERIC, stmt->oldlocale);
+#ifdef HAVE__CONFIGTHREADLOCALE
+ _configthreadlocale(stmt->oldthreadlocale);
+#endif
+ }
+#endif
free_statement(stmt);
}
#ifndef CHAR_BIT
#include <limits.h>
#endif
+#ifdef LOCALE_T_IN_XLOCALE
+#include <xlocale.h>
+#endif
enum COMPAT_MODE
{
bool questionmarks;
struct variable *inlist;
struct variable *outlist;
+#ifdef HAVE_USELOCALE
+ locale_t clocale;
+ locale_t oldlocale;
+#else
char *oldlocale;
+#ifdef HAVE__CONFIGTHREADLOCALE
+ int oldthreadlocale;
+#endif
+#endif
int nparams;
char **paramvalues;
PGresult *results;
projects / postgresql / commitdiff