A NOTE has been added to this issue. ====================================================================== https://austingroupbugs.net/view.php?id=1220 ====================================================================== Reported By: bhaible Assigned To: ====================================================================== Project: 1003.1(2016/18)/Issue7+TC2 Issue ID: 1220 Category: System Interfaces Type: Omission Severity: Editorial Priority: normal Status: New Name: Bruno Haible Organization: GNU User Reference: Section: --- Page Number: --- Line Number: --- Interp Status: --- Final Accepted Text: ====================================================================== Date Submitted: 2018-12-20 13:46 UTC Last Modified: 2020-10-07 13:29 UTC ====================================================================== Summary: Add an API to query the name of a locale category of a locale object ======================================================================
---------------------------------------------------------------------- (0005035) geoffclare (manager) - 2020-10-07 13:29 https://austingroupbugs.net/view.php?id=1220#c5035 ---------------------------------------------------------------------- Alternative changes that solve the thread-safety problem by having getlocalename_l() handle LC_GLOBAL_LOCALE ... On page 286 line 9687 section <locale.h>, add:<blockquote><pre>[CX]const char *getlocalename_l(int, locale_t);[/CX]</pre></blockquote> On page 1050 insert a new getlocalename_l page: <b>NAME</b><blockquote>getlocalename_l - get a locale name from a locale object</blockquote> <b>SYNOPSIS</b><blockquote><pre>[CX]#include <locale.h> const char * getlocalename_l(int category, locale_t locobj);[/CX]</pre></blockquote> <b>DESCRIPTION</b><blockquote>The <i>getlocalename_l</i>() function shall return the locale name for the given locale category of the locale object <i>locobj</i>, or of the global locale if <i>locobj</i> is the special locale object LC_GLOBAL_LOCALE. The <i>category</i> argument specifies the locale category to be queried. If the value is LC_ALL or is not a supported locale category value (see [xref to setlocale()]), <i>getlocalename_l</i>() shall fail. The behavior is undefined if the <i>locobj</i> argument is neither the special locale object LC_GLOBAL_LOCALE nor a valid locale object handle.</blockquote> <b>RETURN VALUE</b><blockquote>Upon successful completion, <i>getlocalename_l</i>() shall return a pointer to a string containing the locale name; otherwise, a null pointer shall be returned. If <i>locobj</i> is LC_GLOBAL_LOCALE, the returned string pointer might be invalidated or the string content might be overwritten by a subsequent call in the same thread to <i>getlocalename_l</i>() with LC_GLOBAL_LOCALE; the returned string pointer might also be invalidated if the calling thread is terminated. Otherwise, the returned string pointer and content shall remain valid until the locale object <i>locobj</i> is used in a call to <i>freelocale</i>() or as the <i>base</i> argument in a successful call to <i>newlocale</i>().</blockquote> <b>ERRORS</b><blockquote>No errors are defined.</blockquote> <b>EXAMPLES</b><blockquote><b>Determining the locale name for a category of the current locale</b> The following example shows how to obtain the locale name for the LC_NUMERIC category of the current thread-local locale, or of the global locale if no thread-local locale is in use.<pre>#include <locale.h> ... const char *name; locale_t loc = uselocale(NULL); name = getlocalename_l(LC_NUMERIC, loc); </pre></blockquote> <b>APPLICATION USAGE</b><blockquote>None.</blockquote> <b>RATIONALE</b><blockquote>Historical versions of <i>getlocalename_l</i>() did not handle the special locale object LC_GLOBAL_LOCALE, requiring that applications used <i>setlocale</i>(<i>category</i>, NULL) to query the global locale if <i>uselocale</i>(NULL) returned LC_GLOBAL_LOCALE. However, since <i>setlocale</i>() is not required to be thread-safe (even when the only concurrent calls are ones that query the locale), this method was problematic for multi-threaded processes. This standard requires that <i>getlocalename_l</i>(<i>category</i>, LC_GLOBAL_LOCALE) queries the global locale in a thread-safe manner, for example by returning a pointer to a thread-local internal buffer instead of a process-wide internal buffer.</blockquote> <b>FUTURE DIRECTIONS</b><blockquote>None.</blockquote> <b>SEE ALSO</b><blockquote>freelocale(), newlocale(), setlocale(), uselocale() XBD Chapter 7 (on page XXX), <locale.h></blockquote> <b>CHANGE HISTORY</b><blockquote>First released in Issue 8.</blockquote> Add getlocalename_l() to the SEE ALSO section for each page listed in the getlocalename_l() SEE ALSO above. On page 3791 line 130104 section E.1, add getlocalename_l() to the POSIX_MULTI_CONCURRENT_LOCALES subprofile group. Issue History Date Modified Username Field Change ====================================================================== 2018-12-20 13:46 bhaible New Issue 2018-12-20 13:46 bhaible Name => Bruno Haible 2018-12-20 13:46 bhaible Organization => GNU 2018-12-20 13:46 bhaible Section => --- 2018-12-20 13:46 bhaible Page Number => --- 2018-12-20 13:46 bhaible Line Number => --- 2020-10-05 11:11 geoffclare Note Added: 0005026 2020-10-05 11:13 geoffclare Note Edited: 0005026 2020-10-05 11:13 geoffclare Note Edited: 0005026 2020-10-05 15:45 bhaible Note Added: 0005027 2020-10-05 17:57 shware_systems Note Added: 0005030 2020-10-05 17:58 shware_systems Note Edited: 0005030 2020-10-07 13:29 geoffclare Note Added: 0005035 ======================================================================
