1 |
schoenebeck |
57 |
#include "MutexTest.h" |
2 |
|
|
|
3 |
|
|
#include <iostream> |
4 |
|
|
|
5 |
|
|
CPPUNIT_TEST_SUITE_REGISTRATION(MutexTest); |
6 |
|
|
|
7 |
schoenebeck |
211 |
using namespace std; |
8 |
schoenebeck |
57 |
|
9 |
schoenebeck |
211 |
|
10 |
schoenebeck |
57 |
// ConcurrentThread |
11 |
|
|
|
12 |
schoenebeck |
503 |
MutexTest::ConcurrentThread::ConcurrentThread() : Thread(false, false, 0, -4) { |
13 |
schoenebeck |
57 |
resource = 0; |
14 |
|
|
} |
15 |
|
|
|
16 |
|
|
int MutexTest::ConcurrentThread::Main() { |
17 |
|
|
mutex.Lock(); |
18 |
|
|
resource++; |
19 |
|
|
mutex.Unlock(); |
20 |
|
|
} |
21 |
|
|
|
22 |
|
|
|
23 |
schoenebeck |
63 |
// DummyThread |
24 |
|
|
|
25 |
schoenebeck |
503 |
MutexTest::DummyThread::DummyThread() : Thread(false, false, 0, -4) { |
26 |
schoenebeck |
63 |
resource = 0; |
27 |
|
|
} |
28 |
|
|
|
29 |
|
|
int MutexTest::DummyThread::Main() { |
30 |
|
|
mutex.Lock(); |
31 |
|
|
mutex.Lock(); |
32 |
|
|
resource++; |
33 |
|
|
mutex.Unlock(); |
34 |
|
|
} |
35 |
|
|
|
36 |
|
|
|
37 |
schoenebeck |
57 |
// MutexTest |
38 |
|
|
|
39 |
schoenebeck |
211 |
void MutexTest::printTestSuiteName() { |
40 |
|
|
cout << "\b \nRunning Mutex Tests: " << flush; |
41 |
|
|
} |
42 |
|
|
|
43 |
schoenebeck |
57 |
void MutexTest::setUp() { |
44 |
|
|
} |
45 |
|
|
|
46 |
|
|
void MutexTest::tearDown() { |
47 |
|
|
} |
48 |
|
|
|
49 |
schoenebeck |
63 |
// Check with only one thread (thus no concurrency) if locking and unlocking the Mutex works without getting the thread to be locked falsely. |
50 |
schoenebeck |
57 |
void MutexTest::testLockAndUnlockBySingleThread() { |
51 |
|
|
ConcurrentThread t; |
52 |
|
|
t.StartThread(); |
53 |
|
|
usleep(200000); // wait 200ms |
54 |
|
|
CPPUNIT_ASSERT(t.resource == 1); |
55 |
|
|
} |
56 |
|
|
|
57 |
schoenebeck |
63 |
// Now check with two concurrent threads if one thread can block the other one by using the Mutex. |
58 |
schoenebeck |
57 |
void MutexTest::testLock() { |
59 |
|
|
ConcurrentThread t; |
60 |
|
|
t.mutex.Lock(); |
61 |
|
|
t.SignalStartThread(); |
62 |
|
|
usleep(400000); // wait 400ms |
63 |
|
|
CPPUNIT_ASSERT(t.resource == 0); |
64 |
|
|
t.mutex.Unlock(); |
65 |
|
|
} |
66 |
|
|
|
67 |
schoenebeck |
63 |
// Now check if the blocked thread get unblocked when thread that owns the Mutex unlocks the Mutex again. |
68 |
schoenebeck |
57 |
void MutexTest::testUnlock() { |
69 |
schoenebeck |
63 |
ConcurrentThread t; |
70 |
|
|
t.mutex.Lock(); |
71 |
|
|
t.SignalStartThread(); |
72 |
|
|
usleep(400000); // wait 400ms |
73 |
|
|
t.mutex.Unlock(); |
74 |
|
|
usleep(400000); // wait 400ms |
75 |
|
|
CPPUNIT_ASSERT(t.resource == 1); |
76 |
schoenebeck |
57 |
} |
77 |
|
|
|
78 |
schoenebeck |
63 |
// Check if the same thread can lock the Mutex twice in a row without unlocking it and without getting blocked itself. |
79 |
schoenebeck |
57 |
void MutexTest::testDoubleLock() { |
80 |
schoenebeck |
63 |
DummyThread t; |
81 |
|
|
t.SignalStartThread(); |
82 |
|
|
usleep(200000); // wait 200ms |
83 |
|
|
CPPUNIT_ASSERT(t.resource == 1); |
84 |
|
|
doubleLockSucceeded = (t.resource == 1); |
85 |
schoenebeck |
57 |
} |
86 |
schoenebeck |
63 |
|
87 |
|
|
// Check if the previous tests namely 'testLock()' and 'testUnlock()' still work with double locking previously |
88 |
|
|
void MutexTest::testDoubleLockStillBlocksConcurrentThread() { |
89 |
|
|
bool success = false; |
90 |
|
|
// check if testDoubleLock() succeeds, otherwise this test doesnt make sense anyway |
91 |
|
|
doubleLockSucceeded = false; |
92 |
|
|
testDoubleLock(); |
93 |
|
|
if (doubleLockSucceeded) { |
94 |
|
|
ConcurrentThread t; |
95 |
|
|
t.mutex.Lock(); |
96 |
|
|
t.mutex.Lock(); |
97 |
|
|
t.SignalStartThread(); |
98 |
|
|
usleep(400000); // wait 400ms |
99 |
|
|
success = (t.resource == 0); |
100 |
|
|
t.mutex.Unlock(); |
101 |
|
|
|
102 |
|
|
if (success) { |
103 |
|
|
usleep(200000); // wait 200ms |
104 |
|
|
success = (t.resource == 1); |
105 |
|
|
} |
106 |
|
|
} |
107 |
|
|
CPPUNIT_ASSERT(success); |
108 |
|
|
} |