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extern/stdcxx/4.2.1/tests/localization/22.locale.statics.mt.cpp

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+/************************************************************************
+ *
+ * 22.locale.statics.mt.cpp
+ *
+ * test exercising the thread safety of [lib.locale.statics]
+ *
+ * $Id: 22.locale.statics.mt.cpp 648752 2008-04-16 17:01:56Z faridz $
+ *
+ ***************************************************************************
+ *
+ * Licensed to the Apache Software  Foundation (ASF) under one or more
+ * contributor  license agreements.  See  the NOTICE  file distributed
+ * with  this  work  for  additional information  regarding  copyright
+ * ownership.   The ASF  licenses this  file to  you under  the Apache
+ * License, Version  2.0 (the  "License"); you may  not use  this file
+ * except in  compliance with the License.   You may obtain  a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the  License is distributed on an  "AS IS" BASIS,
+ * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
+ * implied.   See  the License  for  the  specific language  governing
+ * permissions and limitations under the License.
+ *
+ * Copyright 2007 Rogue Wave Software, Inc.
+ *
+ **************************************************************************/
+
+#include <locale>        // for locale
+#include <cstring>       // for strlen()
+
+#include <rw_locale.h>   // for rw_locales()
+#include <rw_thread.h>   // for rw_get_processors(), rw_thread_pool()
+#include <driver.h>      // for rw_test()
+
+
+// maximum number of threads allowed by the command line interface
+#define MAX_THREADS   16
+
+// 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;
+
+int opt_classic;
+int opt_global;
+
+/**************************************************************************/
+
+// array of locale objects to use for testing
+static std::locale
+locales [MAX_THREADS];
+
+// number of locale names in the array
+static std::size_t
+nlocales;
+
+/**************************************************************************/
+
+extern "C" {
+
+static void*
+test_classic (void*)
+{
+    static volatile int nthreads;
+
+    // cast nthreads to int& (see STDCXX-792)
+    // casting should be removed after fixing STDCXX-794
+    _RWSTD_ATOMIC_PREINCREMENT (_RWSTD_CONST_CAST (int&, nthreads), false);
+
+    // spin until all threads have been created in order to icrease
+    // the odds that at least two of them will hit the tested function
+    // (and the lazy one-time initialization done by it) at the same
+    // time
+    while (nthreads < opt_nthreads);
+
+    const std::locale classic (std::locale::classic ());
+
+    _RWSTD_UNUSED (classic);
+
+    return 0;
+}
+
+
+static void*
+test_global (void*)
+{
+    for (std::size_t i = 0; i != opt_nloops; ++i) {
+
+        const std::size_t inx = i % nlocales;
+
+        const std::locale last (std::locale::global (locales [inx]));
+
+        _RWSTD_UNUSED (last);
+
+        // FIXME: verify the consistency of the returned locale
+        // by making sure that it matches the locale passed to
+        // global() made by the last call to the function by
+        // the last thread
+    }
+    
+    return 0;
+}
+
+}   // extern "C"
+
+/**************************************************************************/
+
+static int
+run_test (int, char**)
+{
+    int result = 0;
+
+    if (rw_note (0 <= opt_classic, 0, __LINE__,
+                 "std::locale::classic() test disabled")) {
+
+        rw_info (0, 0, 0,
+                 "testing std::locale::classic() with %d thread%{?}s%{;}",
+                 opt_nthreads, 1 != opt_nthreads);
+
+        // 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_classic, 0);
+    }
+
+    if (rw_note (0 <= opt_global, 0, __LINE__,
+                 "std::locale::global(const std::locale&) test disabled")) {
+
+
+        // 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;
+
+        const char* locale_names [MAX_THREADS];
+
+        for (const char *name = locale_list;
+             *name;
+             name += std::strlen (name) + 1) {
+
+            locale_names [nlocales] = name;
+            locales [nlocales++]    = std::locale (name);
+
+            if (nlocales == maxinx)
+                break;
+        }
+
+        rw_info (0, 0, 0,
+                 "testing std::locale::global(const std::locale&) 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", locale_names);
+
+        // 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_global, 0);
+    }
+
+    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.statics",
+                    "thread safety",
+                    run_test,
+                    "|-classic~ "
+                    "|-global~ "
+                    "|-nloops#0 "        // arg must be non-negative
+                    "|-nthreads#0-* "    // arg must be in [0, MAX_THREADS]
+                    "|-locales= ",       // argument must be provided
+                    &opt_classic,
+                    &opt_global,
+                    &opt_nloops,
+                    int (MAX_THREADS),
+                    &opt_nthreads,
+                    &rw_opt_setlocales);
+}