From cc24a339d8c0517259084b5c178d784626ba965c Mon Sep 17 00:00:00 2001 From: ImJezze Date: Sun, 21 Feb 2016 11:48:45 +0100 Subject: Merge remote-tracking branch 'refs/remotes/mamedev/master' Second attempt --- 3rdparty/libuv/test/test-mutexes.c | 162 +++++++++++++++++++++++++++++++++++++ 1 file changed, 162 insertions(+) create mode 100644 3rdparty/libuv/test/test-mutexes.c (limited to '3rdparty/libuv/test/test-mutexes.c') 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 +#include + +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; +} -- cgit v1.2.3-70-g09d2