1 // Copyright 2020 The Pigweed Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not
4 // use this file except in compliance with the License. You may obtain a copy of
5 // the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 // License for the specific language governing permissions and limitations under
13 // the License.
14
15 #include "gtest/gtest.h"
16 #include "pw_sync/interrupt_spin_lock.h"
17
18 namespace pw::sync {
19 namespace {
20
21 extern "C" {
22
23 // Functions defined in interrupt_spin_lock_facade_test_c.c which call the API
24 // from C.
25 void pw_sync_InterruptSpinLock_CallLock(
26 pw_sync_InterruptSpinLock* interrupt_spin_lock);
27 bool pw_sync_InterruptSpinLock_CallTryLock(
28 pw_sync_InterruptSpinLock* interrupt_spin_lock);
29 void pw_sync_InterruptSpinLock_CallUnlock(
30 pw_sync_InterruptSpinLock* interrupt_spin_lock);
31
32 } // extern "C"
33
TEST(InterruptSpinLock,LockUnlock)34 TEST(InterruptSpinLock, LockUnlock) {
35 pw::sync::InterruptSpinLock interrupt_spin_lock;
36 interrupt_spin_lock.lock();
37 interrupt_spin_lock.unlock();
38 }
39
40 // TODO(pwbug/291): Add real concurrency tests once we have pw::thread.
41
42 InterruptSpinLock static_interrupt_spin_lock;
TEST(InterruptSpinLock,LockUnlockStatic)43 TEST(InterruptSpinLock, LockUnlockStatic) {
44 static_interrupt_spin_lock.lock();
45 // Ensure it fails to lock when already held.
46 EXPECT_FALSE(static_interrupt_spin_lock.try_lock());
47 static_interrupt_spin_lock.unlock();
48 }
49
TEST(InterruptSpinLock,TryLockUnlock)50 TEST(InterruptSpinLock, TryLockUnlock) {
51 pw::sync::InterruptSpinLock interrupt_spin_lock;
52 const bool locked = interrupt_spin_lock.try_lock();
53 EXPECT_TRUE(locked);
54 if (locked) {
55 // Ensure it fails to lock when already held.
56 EXPECT_FALSE(interrupt_spin_lock.try_lock());
57 interrupt_spin_lock.unlock();
58 }
59 }
60
TEST(InterruptSpinLock,LockUnlockInC)61 TEST(InterruptSpinLock, LockUnlockInC) {
62 pw::sync::InterruptSpinLock interrupt_spin_lock;
63 pw_sync_InterruptSpinLock_CallLock(&interrupt_spin_lock);
64 pw_sync_InterruptSpinLock_CallUnlock(&interrupt_spin_lock);
65 }
66
TEST(InterruptSpinLock,TryLockUnlockInC)67 TEST(InterruptSpinLock, TryLockUnlockInC) {
68 pw::sync::InterruptSpinLock interrupt_spin_lock;
69 ASSERT_TRUE(pw_sync_InterruptSpinLock_CallTryLock(&interrupt_spin_lock));
70 // Ensure it fails to lock when already held.
71 EXPECT_FALSE(pw_sync_InterruptSpinLock_CallTryLock(&interrupt_spin_lock));
72 pw_sync_InterruptSpinLock_CallUnlock(&interrupt_spin_lock);
73 }
74
75 } // namespace
76 } // namespace pw::sync
77