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/* Copyright (c) 2021, MariaDB Corporation.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; version 2 of the License.
This program 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#include <thread>
#include "tap.h"
#include "my_sys.h"
#include "sux_lock.h"
static std::atomic<bool> critical;
ulong srv_n_spin_wait_rounds= 30;
uint srv_spin_wait_delay= 4;
constexpr unsigned N_THREADS= 30;
constexpr unsigned N_ROUNDS= 100;
constexpr unsigned M_ROUNDS= 100;
static srw_mutex m;
static void test_srw_mutex()
{
for (auto i= N_ROUNDS * M_ROUNDS; i--; )
{
m.wr_lock();
assert(!critical);
critical= true;
critical= false;
m.wr_unlock();
}
}
static srw_lock_low l;
static void test_srw_lock()
{
for (auto i= N_ROUNDS; i--; )
{
l.wr_lock();
assert(!critical);
critical= true;
critical= false;
l.wr_unlock();
for (auto j= M_ROUNDS; j--; )
{
l.rd_lock();
assert(!critical);
l.rd_unlock();
}
}
}
static ssux_lock_impl<false> ssux;
static void test_ssux_lock()
{
for (auto i= N_ROUNDS; i--; )
{
ssux.wr_lock();
assert(!critical);
critical= true;
critical= false;
ssux.wr_unlock();
for (auto j= M_ROUNDS; j--; )
{
ssux.rd_lock();
assert(!critical);
ssux.rd_unlock();
}
for (auto j= M_ROUNDS; j--; )
{
ssux.u_lock();
assert(!critical);
ssux.u_wr_upgrade();
assert(!critical);
critical= true;
critical= false;
ssux.wr_u_downgrade();
ssux.u_unlock();
}
}
}
static sux_lock<ssux_lock_impl<true>> sux;
static void test_sux_lock()
{
for (auto i= N_ROUNDS; i--; )
{
sux.x_lock();
assert(!critical);
critical= true;
for (auto j= M_ROUNDS; j--; )
sux.x_lock();
critical= false;
for (auto j= M_ROUNDS + 1; j--; )
sux.x_unlock();
for (auto j= M_ROUNDS; j--; )
{
sux.s_lock();
assert(!critical);
sux.s_unlock();
}
for (auto j= M_ROUNDS / 2; j--; )
{
sux.u_lock();
assert(!critical);
sux.u_lock();
sux.u_x_upgrade();
assert(!critical);
critical= true;
sux.x_unlock();
critical= false;
sux.x_u_downgrade();
sux.u_unlock();
}
}
}
int main(int argc __attribute__((unused)), char **argv)
{
std::thread t[N_THREADS];
MY_INIT(argv[0]);
plan(4);
m.init();
for (auto i= N_THREADS; i--; )
t[i]= std::thread(test_srw_mutex);
for (auto i= N_THREADS; i--; )
t[i].join();
m.destroy();
ok(true, "srw_mutex");
l.init();
for (auto i= N_THREADS; i--; )
t[i]= std::thread(test_srw_lock);
for (auto i= N_THREADS; i--; )
t[i].join();
ok(true, "srw_lock");
l.destroy();
ssux.init();
for (auto i= N_THREADS; i--; )
t[i]= std::thread(test_ssux_lock);
for (auto i= N_THREADS; i--; )
t[i].join();
ok(true, "ssux_lock");
ssux.destroy();
sux.init();
for (auto i= N_THREADS; i--; )
t[i]= std::thread(test_sux_lock);
for (auto i= N_THREADS; i--; )
t[i].join();
ok(true, "sux_lock");
sux.free();
}
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