78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
/* Copyright (C) 2021 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <signal.h>
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#include <tap/basic.h>
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#include "knot/server/dthreads.h"
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#include "contrib/spinlock.h"
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#define THREADS 8
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#define CYCLES 100000
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static volatile int counter = 0;
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static volatile int tens_counter = 0;
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static knot_spin_t spinlock;
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static int thread(struct dthread *thread)
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{
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volatile int i, j, k;
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for (i = 0; i < CYCLES; i++) {
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knot_spin_lock(&spinlock);
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j = counter;
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k = tens_counter;
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if (++j % 10 == 0) {
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k++;
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}
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tens_counter = k;
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counter = j;
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knot_spin_unlock(&spinlock);
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}
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return 0;
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}
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// Signal handler
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static void interrupt_handle(int s)
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{
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}
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int main(int argc, char *argv[])
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{
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plan_lazy();
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// Register service and signal handler
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struct sigaction sa;
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sa.sa_handler = interrupt_handle;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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sigaction(SIGALRM, &sa, NULL); // Interrupt
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knot_spin_init(&spinlock);
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dt_unit_t *unit = dt_create(THREADS, thread, NULL, NULL);
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dt_start(unit);
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dt_join(unit);
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dt_delete(&unit);
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knot_spin_destroy(&spinlock);
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is_int(THREADS * CYCLES, counter, "spinlock: protected counter one");
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is_int(THREADS * CYCLES / 10, tens_counter, "spinlock: protected counter two");
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return 0;
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}
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