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Mutex-free implementation of pthread_rwlock

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Bug: 8133149
Change-Id: Id6775010d95f2634b173daa55d87a59a3cf4131b
This commit is contained in:
Calin Juravle
2014-05-19 13:41:10 +01:00
parent 9b95ea936a
commit 76f352eec1
3 changed files with 221 additions and 190 deletions
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37
tests/pthread_test.cpp
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@@ -551,12 +551,49 @@ TEST(pthread, pthread_rwlock_smoke) {
pthread_rwlock_t l;
ASSERT_EQ(0, pthread_rwlock_init(&l, NULL));
// Single read lock
ASSERT_EQ(0, pthread_rwlock_rdlock(&l));
ASSERT_EQ(0, pthread_rwlock_unlock(&l));
// Multiple read lock
ASSERT_EQ(0, pthread_rwlock_rdlock(&l));
ASSERT_EQ(0, pthread_rwlock_rdlock(&l));
ASSERT_EQ(0, pthread_rwlock_unlock(&l));
ASSERT_EQ(0, pthread_rwlock_unlock(&l));
// Write lock
ASSERT_EQ(0, pthread_rwlock_wrlock(&l));
ASSERT_EQ(0, pthread_rwlock_unlock(&l));
// Try writer lock
ASSERT_EQ(0, pthread_rwlock_trywrlock(&l));
ASSERT_EQ(EBUSY, pthread_rwlock_trywrlock(&l));
ASSERT_EQ(EBUSY, pthread_rwlock_tryrdlock(&l));
ASSERT_EQ(0, pthread_rwlock_unlock(&l));
// Try reader lock
ASSERT_EQ(0, pthread_rwlock_tryrdlock(&l));
ASSERT_EQ(0, pthread_rwlock_tryrdlock(&l));
ASSERT_EQ(EBUSY, pthread_rwlock_trywrlock(&l));
ASSERT_EQ(0, pthread_rwlock_unlock(&l));
ASSERT_EQ(0, pthread_rwlock_unlock(&l));
// Try writer lock after unlock
ASSERT_EQ(0, pthread_rwlock_wrlock(&l));
ASSERT_EQ(0, pthread_rwlock_unlock(&l));
#ifdef __BIONIC__
// EDEADLK in "read after write"
ASSERT_EQ(0, pthread_rwlock_wrlock(&l));
ASSERT_EQ(EDEADLK, pthread_rwlock_rdlock(&l));
ASSERT_EQ(0, pthread_rwlock_unlock(&l));
// EDEADLK in "write after write"
ASSERT_EQ(0, pthread_rwlock_wrlock(&l));
ASSERT_EQ(EDEADLK, pthread_rwlock_wrlock(&l));
ASSERT_EQ(0, pthread_rwlock_unlock(&l));
#endif
ASSERT_EQ(0, pthread_rwlock_destroy(&l));
}