mirror of
https://gitlab.nic.cz/knot/knot-dns.git
synced 2026-02-03 18:49:28 -05:00
67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
/* Copyright (C) CZ.NIC, z.s.p.o. and contributors
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* SPDX-License-Identifier: GPL-2.0-or-later
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* For more information, see <https://www.knot-dns.cz/>
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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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