#include "internal.h"
#include <gtest/gtest.h>
#if defined(OPENSSL_THREADS)
#include <thread>
#endif
TEST(RefCountTest, Basic) {
CRYPTO_refcount_t count = 0;
CRYPTO_refcount_inc(&count);
EXPECT_EQ(1u, count);
EXPECT_TRUE(CRYPTO_refcount_dec_and_test_zero(&count));
EXPECT_EQ(0u, count);
count = CRYPTO_REFCOUNT_MAX;
CRYPTO_refcount_inc(&count);
EXPECT_EQ(CRYPTO_REFCOUNT_MAX, count)
<< "Count did not saturate correctly when incrementing.";
EXPECT_FALSE(CRYPTO_refcount_dec_and_test_zero(&count));
EXPECT_EQ(CRYPTO_REFCOUNT_MAX, count)
<< "Count did not saturate correctly when decrementing.";
count = 2;
EXPECT_FALSE(CRYPTO_refcount_dec_and_test_zero(&count));
EXPECT_EQ(1u, count);
}
#if defined(OPENSSL_THREADS)
TEST(RefCountTest, Threads) {
CRYPTO_refcount_t count = 0;
{
std::thread thread([&] { CRYPTO_refcount_inc(&count); });
CRYPTO_refcount_inc(&count);
thread.join();
EXPECT_EQ(2u, count);
}
{
std::thread thread([&] { CRYPTO_refcount_inc(&count); });
EXPECT_FALSE(CRYPTO_refcount_dec_and_test_zero(&count));
thread.join();
EXPECT_EQ(2u, count);
}
{
bool thread_saw_zero;
std::thread thread(
[&] { thread_saw_zero = CRYPTO_refcount_dec_and_test_zero(&count); });
bool saw_zero = CRYPTO_refcount_dec_and_test_zero(&count);
thread.join();
EXPECT_EQ(0u, count);
EXPECT_NE(saw_zero, thread_saw_zero);
}
}
#endif