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+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * version: DPDK.L.1.2.3-3
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <sys/queue.h>
+
+#include <cmdline_parse.h>
+
+#include <rte_common.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_per_lcore.h>
+#include <rte_launch.h>
+#include <rte_atomic.h>
+#include <rte_rwlock.h>
+#include <rte_tailq.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_cycles.h>
+
+#include "test.h"
+
+/*
+ * rwlock test
+ * ===========
+ *
+ * - There is a global rwlock and a table of rwlocks (one per lcore).
+ *
+ * - The test function takes all of these locks and launches the
+ * ``test_rwlock_per_core()`` function on each core (except the master).
+ *
+ * - The function takes the global write lock, display something,
+ * then releases the global lock.
+ * - Then, it takes the per-lcore write lock, display something, and
+ * releases the per-core lock.
+ * - Finally, a read lock is taken during 100 ms, then released.
+ *
+ * - The main function unlocks the per-lcore locks sequentially and
+ * waits between each lock. This triggers the display of a message
+ * for each core, in the correct order.
+ *
+ * Then, it tries to take the global write lock and display the last
+ * message. The autotest script checks that the message order is correct.
+ */
+
+static rte_rwlock_t sl;
+static rte_rwlock_t sl_tab[RTE_MAX_LCORE];
+
+static int
+test_rwlock_per_core(__attribute__((unused)) void *arg)
+{
+ rte_rwlock_write_lock(&sl);
+ printf("Global write lock taken on core %u\n", rte_lcore_id());
+ rte_rwlock_write_unlock(&sl);
+
+ rte_rwlock_write_lock(&sl_tab[rte_lcore_id()]);
+ printf("Hello from core %u !\n", rte_lcore_id());
+ rte_rwlock_write_unlock(&sl_tab[rte_lcore_id()]);
+
+ rte_rwlock_read_lock(&sl);
+ printf("Global read lock taken on core %u\n", rte_lcore_id());
+ rte_delay_ms(100);
+ printf("Release global read lock on core %u\n", rte_lcore_id());
+ rte_rwlock_read_unlock(&sl);
+
+ return 0;
+}
+
+int
+test_rwlock(void)
+{
+ int i;
+
+ rte_rwlock_init(&sl);
+ for (i=0; i<RTE_MAX_LCORE; i++)
+ rte_rwlock_init(&sl_tab[i]);
+
+ rte_rwlock_write_lock(&sl);
+
+ RTE_LCORE_FOREACH_SLAVE(i) {
+ rte_rwlock_write_lock(&sl_tab[i]);
+ rte_eal_remote_launch(test_rwlock_per_core, NULL, i);
+ }
+
+ rte_rwlock_write_unlock(&sl);
+
+ RTE_LCORE_FOREACH_SLAVE(i) {
+ rte_rwlock_write_unlock(&sl_tab[i]);
+ rte_delay_ms(100);
+ }
+
+ rte_rwlock_write_lock(&sl);
+ /* this message should be the last message of test */
+ printf("Global write lock taken on master core %u\n", rte_lcore_id());
+ rte_rwlock_write_unlock(&sl);
+
+ rte_eal_mp_wait_lcore();
+
+ return 0;
+}