22.locale.cons.mt.cpp

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#include <locale>     // for locale
 
#include <cstring>    // for strlen()
 
#include <rw_locale.h>
#include <rw_thread.h>   // for rw_get_processors (), rw_thread_pool()
#include <rw_driver.h>
 
 
// maximum number of threads allowed by the command line interface
#define MAX_THREADS   32
 
// default number of threads (will be adjusted to the number
// of processors/cores later)
int opt_nthreads = 1;
 
// the number of times each thread should iterate (unless specified
// otherwise on the command line)
int opt_nloops = 20000;
 
// tristate flag set in response to the --no-combine/--enable-combine
// command line option
int opt_combine;
 
// default timeout used by each threaded section of this test
int opt_timeout = 60;
 
 
// array of locale names to use for testing
static const char*
locales [MAX_THREADS];
 
// number of locale names in the array
static std::size_t
nlocales;
 
 
extern "C" {
 
static void*
test_ctors (void*)
{
    static const std::locale::category cats[] = {
        std::locale::all,
        std::locale::collate,
        std::locale::ctype,
        std::locale::messages,
        std::locale::monetary,
        std::locale::numeric,
        std::locale::time,
        std::locale::none
    };
 
    static const std::size_t ncats = sizeof cats / sizeof *cats;
 
    // the next locale "advanced" in each iteration of the loop
    std::locale next (locales [0]);
 
    for (int i = 0; i != opt_nloops; ++i) {
 
        if (rw_thread_pool_timeout_expired ())
            break;
 
        // compute an index into the array of locales
        const std::size_t linx = i % nlocales;
 
        // create two locale objects from the same name and verify
        // they are equal
        const std::locale first (next.name ().c_str ());
        const std::locale second (next.name ().c_str ());
 
        RW_ASSERT (first == second);
 
        // create another locale object as a copy of one of the two
        // above and verify it's equal to the other
        const std::locale third (first);
 
        RW_ASSERT (second == third);
 
        // compute the next index into the array of locales
        const std::size_t ninx = (i + 1) % nlocales;
        const char* const next_name = locales [ninx];
 
        // create the next locale from a name
        next = std::locale (next_name);
 
        if (0 <= opt_combine) {
            // compute an index into the array of categories
            const std::size_t cinx = i % ncats;
            const std::locale::category cat = cats [cinx];
 
            // create a locale from another object and the name of yet
            // another locale, combining some (none, one, or all) of their
            // categories
            const std::locale combined (first, next_name, cat);
 
            // verify that the locales were created correctly
            if (   std::locale::none == cat
#if defined (_MSC_VER) || defined (__MINGW32__)
                || std::locale::messages == cat
#endif
                || first == next) {
                RW_ASSERT (combined == first);
            }
            else if (std::locale::all == cat)
                RW_ASSERT (combined == next);
            else
                RW_ASSERT (combined != first && combined != next);
 
            // repeat the step above but with a locale object
            const std::locale combined_2 (first, next, cat);
 
            if (   std::locale::none == cat
#if defined (_MSC_VER) || defined (__MINGW32__)
                || std::locale::messages == cat
#endif
                || first == next) {
                RW_ASSERT (combined_2 == first);
            }
            else if (std::locale::all == cat)
                RW_ASSERT (combined_2 == next);
            else
                RW_ASSERT (combined_2 != first && combined_2 != next);
        }
    }
 
    return 0;
}
 
}   // extern "C"
 
 
static int
run_test (int, char**)
{
    // find all installed locales for which setlocale(LC_ALL) succeeds
    const char* const locale_list =
        rw_opt_locales ? rw_opt_locales : rw_locales (_RWSTD_LC_ALL);
 
    const std::size_t maxinx = sizeof locales / sizeof *locales;
 
    for (const char *name = locale_list; *name; name += std::strlen (name) +1) {
 
        locales [nlocales++] = name;
 
        if (nlocales == maxinx)
            break;
    }
 
    int result;
 
    rw_info (0, 0, 0,
             "testing std::locale ctors with %d thread%{?}s%{;}, "
             "%d iteration%{?}s%{;} each, in %zu locales { %{ .*A@} }",
             opt_nthreads, 1 != opt_nthreads,
             opt_nloops, 1 != opt_nloops,
             nlocales, int (nlocales), "%#s", locales);
 
    // create and start a pool of threads and wait for them to finish
    result = rw_thread_pool (0, std::size_t (opt_nthreads), 0,
                             test_ctors, 0, std::size_t (opt_timeout));
 
    rw_error (result == 0, 0, __LINE__,
              "rw_thread_pool(0, %d, 0, %{#f}, 0) failed",
              opt_nthreads, test_ctors);
 
    return result;
}
 
 
int main (int argc, char *argv[])
{
#ifdef _RWSTD_REENTRANT
 
    // set nthreads to the greater of the number of processors
    // and 2 (for uniprocessor systems) by default
    opt_nthreads = rw_get_cpus ();
    if (opt_nthreads < 2)
        opt_nthreads = 2;
 
#endif   // _RWSTD_REENTRANT
 
    return rw_test (argc, argv, __FILE__,
                    "lib.locale.cons",
                    "thread safety", run_test,
                    "|-combine~ "
                    "|-soft-timeout#0 "  // must be non-negative
                    "|-nloops#0 "        // must be non-negative
                    "|-nthreads#0-* "    // must be in [0, MAX_THREADS]
                    "|-locales=",        // must be provided
                    &opt_combine,
                    &opt_timeout,
                    &opt_nloops,
                    int (MAX_THREADS),
                    &opt_nthreads,
                    &rw_opt_setlocales);
}