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// Copyright 2022 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#include <chrono>
#include "gtest/gtest.h"
#include "pw_sync/recursive_mutex.h"
namespace pw::sync {
namespace {
extern "C" {
// Functions defined in recusive_mutex_facade_test_c.c that call the API from C.
void pw_sync_RecursiveMutex_CallLock(pw_sync_RecursiveMutex* mutex);
bool pw_sync_RecursiveMutex_CallTryLock(pw_sync_RecursiveMutex* mutex);
void pw_sync_RecursiveMutex_CallUnlock(pw_sync_RecursiveMutex* mutex);
} // extern "C"
// TODO(b/235284163): Add real concurrency tests once we have pw::thread.
TEST(RecursiveMutex, LockUnlock) PW_NO_LOCK_SAFETY_ANALYSIS {
pw::sync::RecursiveMutex mutex;
for (int i = 0; i < 10; ++i) {
mutex.lock();
}
for (int i = 0; i < 10; ++i) {
mutex.unlock();
}
}
RecursiveMutex static_mutex;
TEST(RecursiveMutex, LockUnlockStatic) PW_NO_LOCK_SAFETY_ANALYSIS {
static_mutex.lock();
for (int i = 0; i < 10; ++i) {
EXPECT_TRUE(static_mutex.try_lock());
}
for (int i = 0; i < 10; ++i) {
static_mutex.unlock(); // undo the try_lock() calls
}
static_mutex.unlock(); // undo the inital lock() call
}
TEST(RecursiveMutex, TryLockUnlock) PW_NO_LOCK_SAFETY_ANALYSIS {
pw::sync::RecursiveMutex mutex;
ASSERT_TRUE(mutex.try_lock());
const bool locked_again = mutex.try_lock();
EXPECT_TRUE(locked_again);
if (locked_again) {
mutex.unlock();
}
mutex.unlock();
}
TEST(RecursiveMutex, LockUnlockInC) {
pw::sync::RecursiveMutex mutex;
pw_sync_RecursiveMutex_CallLock(&mutex);
pw_sync_RecursiveMutex_CallLock(&mutex);
pw_sync_RecursiveMutex_CallLock(&mutex);
pw_sync_RecursiveMutex_CallUnlock(&mutex);
pw_sync_RecursiveMutex_CallUnlock(&mutex);
pw_sync_RecursiveMutex_CallUnlock(&mutex);
}
TEST(RecursiveMutex, TryLockUnlockInC) {
pw::sync::RecursiveMutex mutex;
ASSERT_TRUE(pw_sync_RecursiveMutex_CallTryLock(&mutex));
const bool locked_again = pw_sync_RecursiveMutex_CallTryLock(&mutex);
EXPECT_TRUE(locked_again);
if (locked_again) {
pw_sync_RecursiveMutex_CallUnlock(&mutex);
}
pw_sync_RecursiveMutex_CallUnlock(&mutex);
}
} // namespace
} // namespace pw::sync
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