Basic relay link connection

libs/evt-tls/sample/libuv-tls/libuv/test/test-mutexes.c

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+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "task.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+
+/* The mutex and rwlock tests are really poor.
+ * They're very basic sanity checks and nothing more.
+ * Apologies if that rhymes.
+ */
+
+TEST_IMPL(thread_mutex) {
+  uv_mutex_t mutex;
+  int r;
+
+  r = uv_mutex_init(&mutex);
+  ASSERT(r == 0);
+
+  uv_mutex_lock(&mutex);
+  uv_mutex_unlock(&mutex);
+  uv_mutex_destroy(&mutex);
+
+  return 0;
+}
+
+
+TEST_IMPL(thread_rwlock) {
+  uv_rwlock_t rwlock;
+  int r;
+
+  r = uv_rwlock_init(&rwlock);
+  ASSERT(r == 0);
+
+  uv_rwlock_rdlock(&rwlock);
+  uv_rwlock_rdunlock(&rwlock);
+  uv_rwlock_wrlock(&rwlock);
+  uv_rwlock_wrunlock(&rwlock);
+  uv_rwlock_destroy(&rwlock);
+
+  return 0;
+}
+
+
+TEST_IMPL(thread_rwlock_trylock) {
+  uv_rwlock_t rwlock;
+  int r;
+
+  r = uv_rwlock_init(&rwlock);
+  ASSERT(r == 0);
+
+  /* No locks held. */
+
+  r = uv_rwlock_trywrlock(&rwlock);
+  ASSERT(r == 0);
+
+  /* Write lock held. */
+
+  r = uv_rwlock_tryrdlock(&rwlock);
+  ASSERT(r == UV_EBUSY);
+  r = uv_rwlock_trywrlock(&rwlock);
+  ASSERT(r == UV_EBUSY);
+
+  uv_rwlock_wrunlock(&rwlock);
+
+  /* No locks held. */
+
+  r = uv_rwlock_tryrdlock(&rwlock);
+  ASSERT(r == 0);
+
+  /* One read lock held. */
+
+  r = uv_rwlock_tryrdlock(&rwlock);
+  ASSERT(r == 0);
+
+  /* Two read locks held. */
+
+  r = uv_rwlock_trywrlock(&rwlock);
+  ASSERT(r == UV_EBUSY);
+
+  uv_rwlock_rdunlock(&rwlock);
+
+  /* One read lock held. */
+
+  uv_rwlock_rdunlock(&rwlock);
+
+  /* No read locks held. */
+
+  r = uv_rwlock_trywrlock(&rwlock);
+  ASSERT(r == 0);
+
+  /* Write lock held. */
+
+  uv_rwlock_wrunlock(&rwlock);
+
+  /* No locks held. */
+
+  uv_rwlock_destroy(&rwlock);
+
+  return 0;
+}