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glibc/nptl/tst-thread_local1.cc
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/* Test basic thread_local support. | |
Copyright (C) 2015-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <pthread.h> | |
#include <stdio.h> | |
#include <string.h> | |
#include <functional> | |
#include <string> | |
#include <thread> | |
struct counter | |
{ | |
int constructed {}; | |
int destructed {}; | |
void reset (); | |
}; | |
void | |
counter::reset () | |
{ | |
constructed = 0; | |
destructed = 0; | |
} | |
static std::string | |
to_string (const counter &c) | |
{ | |
char buf[128]; | |
snprintf (buf, sizeof (buf), "%d/%d", | |
c.constructed, c.destructed); | |
return buf; | |
} | |
template <counter *Counter> | |
struct counting | |
{ | |
counting () __attribute__ ((noinline, noclone)); | |
~counting () __attribute__ ((noinline, noclone)); | |
void operation () __attribute__ ((noinline, noclone)); | |
}; | |
template<counter *Counter> | |
__attribute__ ((noinline, noclone)) | |
counting<Counter>::counting () | |
{ | |
++Counter->constructed; | |
} | |
template<counter *Counter> | |
__attribute__ ((noinline, noclone)) | |
counting<Counter>::~counting () | |
{ | |
++Counter->destructed; | |
} | |
template<counter *Counter> | |
void __attribute__ ((noinline, noclone)) | |
counting<Counter>::operation () | |
{ | |
// Optimization barrier. | |
asm (""); | |
} | |
static counter counter_static; | |
static counter counter_anonymous_namespace; | |
static counter counter_extern; | |
static counter counter_function_local; | |
static bool errors (false); | |
static std::string | |
all_counters () | |
{ | |
return to_string (counter_static) | |
+ ' ' + to_string (counter_anonymous_namespace) | |
+ ' ' + to_string (counter_extern) | |
+ ' ' + to_string (counter_function_local); | |
} | |
static void | |
check_counters (const char *name, const char *expected) | |
{ | |
std::string actual{all_counters ()}; | |
if (actual != expected) | |
{ | |
printf ("error: %s: (%s) != (%s)\n", | |
name, actual.c_str (), expected); | |
errors = true; | |
} | |
} | |
static void | |
reset_all () | |
{ | |
counter_static.reset (); | |
counter_anonymous_namespace.reset (); | |
counter_extern.reset (); | |
counter_function_local.reset (); | |
} | |
static thread_local counting<&counter_static> counting_static; | |
namespace { | |
thread_local counting<&counter_anonymous_namespace> | |
counting_anonymous_namespace; | |
} | |
extern thread_local counting<&counter_extern> counting_extern; | |
thread_local counting<&counter_extern> counting_extern; | |
static void * | |
thread_without_access (void *) | |
{ | |
return nullptr; | |
} | |
static void * | |
thread_with_access (void *) | |
{ | |
thread_local counting<&counter_function_local> counting_function_local; | |
counting_function_local.operation (); | |
check_counters ("early in thread_with_access", "0/0 0/0 0/0 1/0"); | |
counting_static.operation (); | |
counting_anonymous_namespace.operation (); | |
counting_extern.operation (); | |
check_counters ("in thread_with_access", "1/0 1/0 1/0 1/0"); | |
return nullptr; | |
} | |
static int | |
do_test (void) | |
{ | |
std::function<void (void *(void *))> do_pthread = | |
[](void *(func) (void *)) | |
{ | |
pthread_t thr; | |
int ret = pthread_create (&thr, nullptr, func, nullptr); | |
if (ret != 0) | |
{ | |
errno = ret; | |
printf ("error: pthread_create: %m\n"); | |
errors = true; | |
return; | |
} | |
ret = pthread_join (thr, nullptr); | |
if (ret != 0) | |
{ | |
errno = ret; | |
printf ("error: pthread_join: %m\n"); | |
errors = true; | |
return; | |
} | |
}; | |
std::function<void (void *(void *))> do_std_thread = | |
[](void *(func) (void *)) | |
{ | |
std::thread thr{[func] {func (nullptr);}}; | |
thr.join (); | |
}; | |
std::array<std::pair<const char *, std::function<void (void *(void *))>>, 2> | |
do_thread_X | |
{{ | |
{"pthread_create", do_pthread}, | |
{"std::thread", do_std_thread}, | |
}}; | |
for (auto do_thread : do_thread_X) | |
{ | |
printf ("info: testing %s\n", do_thread.first); | |
check_counters ("initial", "0/0 0/0 0/0 0/0"); | |
do_thread.second (thread_without_access); | |
check_counters ("after thread_without_access", "0/0 0/0 0/0 0/0"); | |
reset_all (); | |
do_thread.second (thread_with_access); | |
check_counters ("after thread_with_access", "1/1 1/1 1/1 1/1"); | |
reset_all (); | |
} | |
return errors; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |