summaryrefslogtreecommitdiffstatshomepage
path: root/3rdparty/libuv/test/test-mutexes.c
diff options
context:
space:
mode:
author ImJezze <jezze@gmx.net>2016-02-21 11:48:45 +0100
committer ImJezze <jezze@gmx.net>2016-02-21 11:48:45 +0100
commitcc24a339d8c0517259084b5c178d784626ba965c (patch)
tree9868e9687b5802ae0a3733712a3bbeb3bc75c953 /3rdparty/libuv/test/test-mutexes.c
parentb5daabda5495dea5c50e17961ecfed2ea8619d76 (diff)
Merge remote-tracking branch 'refs/remotes/mamedev/master'
Second attempt
Diffstat (limited to '3rdparty/libuv/test/test-mutexes.c')
-rw-r--r--3rdparty/libuv/test/test-mutexes.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/3rdparty/libuv/test/test-mutexes.c b/3rdparty/libuv/test/test-mutexes.c
new file mode 100644
index 00000000000..af5e4e88a22
--- /dev/null
+++ b/3rdparty/libuv/test/test-mutexes.c
@@ -0,0 +1,162 @@
+/* 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>
+
+static uv_cond_t condvar;
+static uv_mutex_t mutex;
+static uv_rwlock_t rwlock;
+static int step;
+
+/* 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;
+}
+
+
+/* Call when holding |mutex|. */
+static void synchronize_nowait(void) {
+ step += 1;
+ uv_cond_signal(&condvar);
+}
+
+
+/* Call when holding |mutex|. */
+static void synchronize(void) {
+ int current;
+
+ synchronize_nowait();
+ /* Wait for the other thread. Guard against spurious wakeups. */
+ for (current = step; current == step; uv_cond_wait(&condvar, &mutex));
+ ASSERT(step == current + 1);
+}
+
+
+static void thread_rwlock_trylock_peer(void* unused) {
+ (void) &unused;
+
+ uv_mutex_lock(&mutex);
+
+ /* Write lock held by other thread. */
+ ASSERT(UV_EBUSY == uv_rwlock_tryrdlock(&rwlock));
+ ASSERT(UV_EBUSY == uv_rwlock_trywrlock(&rwlock));
+ synchronize();
+
+ /* Read lock held by other thread. */
+ ASSERT(0 == uv_rwlock_tryrdlock(&rwlock));
+ uv_rwlock_rdunlock(&rwlock);
+ ASSERT(UV_EBUSY == uv_rwlock_trywrlock(&rwlock));
+ synchronize();
+
+ /* Acquire write lock. */
+ ASSERT(0 == uv_rwlock_trywrlock(&rwlock));
+ synchronize();
+
+ /* Release write lock and acquire read lock. */
+ uv_rwlock_wrunlock(&rwlock);
+ ASSERT(0 == uv_rwlock_tryrdlock(&rwlock));
+ synchronize();
+
+ uv_rwlock_rdunlock(&rwlock);
+ synchronize_nowait(); /* Signal main thread we're going away. */
+ uv_mutex_unlock(&mutex);
+}
+
+
+TEST_IMPL(thread_rwlock_trylock) {
+ uv_thread_t thread;
+
+ ASSERT(0 == uv_cond_init(&condvar));
+ ASSERT(0 == uv_mutex_init(&mutex));
+ ASSERT(0 == uv_rwlock_init(&rwlock));
+
+ uv_mutex_lock(&mutex);
+ ASSERT(0 == uv_thread_create(&thread, thread_rwlock_trylock_peer, NULL));
+
+ /* Hold write lock. */
+ ASSERT(0 == uv_rwlock_trywrlock(&rwlock));
+ synchronize(); /* Releases the mutex to the other thread. */
+
+ /* Release write lock and acquire read lock. Pthreads doesn't support
+ * the notion of upgrading or downgrading rwlocks, so neither do we.
+ */
+ uv_rwlock_wrunlock(&rwlock);
+ ASSERT(0 == uv_rwlock_tryrdlock(&rwlock));
+ synchronize();
+
+ /* Release read lock. */
+ uv_rwlock_rdunlock(&rwlock);
+ synchronize();
+
+ /* Write lock held by other thread. */
+ ASSERT(UV_EBUSY == uv_rwlock_tryrdlock(&rwlock));
+ ASSERT(UV_EBUSY == uv_rwlock_trywrlock(&rwlock));
+ synchronize();
+
+ /* Read lock held by other thread. */
+ ASSERT(0 == uv_rwlock_tryrdlock(&rwlock));
+ uv_rwlock_rdunlock(&rwlock);
+ ASSERT(UV_EBUSY == uv_rwlock_trywrlock(&rwlock));
+ synchronize();
+
+ ASSERT(0 == uv_thread_join(&thread));
+ uv_rwlock_destroy(&rwlock);
+ uv_mutex_unlock(&mutex);
+ uv_mutex_destroy(&mutex);
+ uv_cond_destroy(&condvar);
+
+ return 0;
+}