tequilaOS/platform_bionic
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Merge "Fix compare_exchange_weak tests to allow spurious failure"

Browse source
This commit is contained in:
Hans Boehm 2017-04-06 01:02:28 +00:00 committed by Gerrit Code Review
commit e06c69d073
1 changed files with 19 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
tests/stdatomic_test.cpp
View file

@ -116,20 +116,34 @@ TEST(stdatomic, atomic_compare_exchange) {
atomic_store(&i, 123);
expected = 123;
ASSERT_TRUE(atomic_compare_exchange_strong_explicit(&i, &expected, 456, memory_order_relaxed, memory_order_relaxed));
ASSERT_FALSE(atomic_compare_exchange_strong_explicit(&i, &expected, 456, memory_order_relaxed, memory_order_relaxed));
ASSERT_TRUE(atomic_compare_exchange_strong_explicit(&i, &expected, 456, memory_order_relaxed,
memory_order_relaxed));
ASSERT_FALSE(atomic_compare_exchange_strong_explicit(&i, &expected, 456, memory_order_relaxed,
memory_order_relaxed));
ASSERT_EQ(456, expected);
atomic_store(&i, 123);
expected = 123;
ASSERT_TRUE(atomic_compare_exchange_weak(&i, &expected, 456));
int iter_count = 0;
do {
++iter_count;
ASSERT_LT(iter_count, 100); // Arbitrary limit on spurious compare_exchange failures.
ASSERT_EQ(expected, 123);
} while(!atomic_compare_exchange_weak(&i, &expected, 456));
ASSERT_FALSE(atomic_compare_exchange_weak(&i, &expected, 456));
ASSERT_EQ(456, expected);
atomic_store(&i, 123);
expected = 123;
ASSERT_TRUE(atomic_compare_exchange_weak_explicit(&i, &expected, 456, memory_order_relaxed, memory_order_relaxed));
ASSERT_FALSE(atomic_compare_exchange_weak_explicit(&i, &expected, 456, memory_order_relaxed, memory_order_relaxed));
iter_count = 0;
do {
++iter_count;
ASSERT_LT(iter_count, 100);
ASSERT_EQ(expected, 123);
} while(!atomic_compare_exchange_weak_explicit(&i, &expected, 456, memory_order_relaxed,
memory_order_relaxed));
ASSERT_FALSE(atomic_compare_exchange_weak_explicit(&i, &expected, 456, memory_order_relaxed,
memory_order_relaxed));
ASSERT_EQ(456, expected);
}