| | |
| | | * ===================================================================================== |
| | | */ |
| | | #include "bh_api.h" |
| | | #include "robust.h" |
| | | #include "util.h" |
| | | #include <atomic> |
| | | #include <boost/lockfree/queue.hpp> |
| | |
| | | // printf("client Recv reply : %s\n", reply.data().c_str()); |
| | | } |
| | | |
| | | class TLMutex |
| | | { |
| | | typedef boost::interprocess::interprocess_mutex MutexT; |
| | | // typedef CasMutex MutexT; |
| | | // typedef std::mutex MutexT; |
| | | typedef std::chrono::steady_clock Clock; |
| | | typedef Clock::duration Duration; |
| | | static Duration Now() { return Clock::now().time_since_epoch(); } |
| | | |
| | | const Duration limit_; |
| | | std::atomic<Duration> last_lock_time_; |
| | | MutexT mutex_; |
| | | bool Expired(const Duration diff) { return diff > limit_; } |
| | | |
| | | public: |
| | | struct Status { |
| | | int64_t nlock_ = 0; |
| | | int64_t nupdate_time_fail = 0; |
| | | int64_t nfail = 0; |
| | | int64_t nexcept = 0; |
| | | }; |
| | | Status st_; |
| | | |
| | | explicit TLMutex(Duration limit) : |
| | | limit_(limit) {} |
| | | TLMutex() : |
| | | TLMutex(std::chrono::seconds(1)) {} |
| | | ~TLMutex() { static_assert(std::is_pod<Duration>::value); } |
| | | bool try_lock() |
| | | { |
| | | if (mutex_.try_lock()) { |
| | | auto old_time = last_lock_time_.load(); |
| | | auto cur = Now(); |
| | | if (Expired(cur - old_time)) { |
| | | return last_lock_time_.compare_exchange_strong(old_time, cur); |
| | | } else { |
| | | last_lock_time_.store(Now()); |
| | | return true; |
| | | } |
| | | } else { |
| | | auto old_time = last_lock_time_.load(); |
| | | auto cur = Now(); |
| | | if (Expired(cur - old_time)) { |
| | | return last_lock_time_.compare_exchange_strong(old_time, cur); |
| | | } else { |
| | | return false; |
| | | } |
| | | } |
| | | } |
| | | void lock() |
| | | { |
| | | int n = 0; |
| | | while (!try_lock()) { |
| | | n++; |
| | | std::this_thread::yield(); |
| | | } |
| | | st_.nlock_ += n; |
| | | } |
| | | void unlock() |
| | | { |
| | | auto old_time = last_lock_time_.load(); |
| | | auto cur = Now(); |
| | | if (!Expired(cur - old_time)) { |
| | | if (last_lock_time_.compare_exchange_strong(old_time, cur)) { |
| | | mutex_.unlock(); |
| | | } |
| | | } |
| | | } |
| | | }; |
| | | |
| | | //robust attr does NOT work, maybe os does not support it. |
| | | class RobustMutex |
| | | { |
| | | public: |
| | | RobustMutex() |
| | | { |
| | | pthread_mutexattr_t mutex_attr; |
| | | auto attr = [&]() { return &mutex_attr; }; |
| | | int r = pthread_mutexattr_init(attr()); |
| | | r |= pthread_mutexattr_setpshared(attr(), PTHREAD_PROCESS_SHARED); |
| | | r |= pthread_mutexattr_setrobust_np(attr(), PTHREAD_MUTEX_ROBUST_NP); |
| | | r |= pthread_mutex_init(mtx(), attr()); |
| | | int rob = 0; |
| | | pthread_mutexattr_getrobust_np(attr(), &rob); |
| | | int shared = 0; |
| | | pthread_mutexattr_getpshared(attr(), &shared); |
| | | printf("robust : %d, shared : %d\n", rob, shared); |
| | | r |= pthread_mutexattr_destroy(attr()); |
| | | if (r) { |
| | | throw("init mutex error."); |
| | | } |
| | | } |
| | | ~RobustMutex() |
| | | { |
| | | pthread_mutex_destroy(mtx()); |
| | | } |
| | | |
| | | public: |
| | | void lock() { Lock(); } |
| | | bool try_lock() |
| | | { |
| | | int r = TryLock(); |
| | | printf("TryLock ret: %d\n", r); |
| | | return r == 0; |
| | | } |
| | | |
| | | void unlock() { Unlock(); } |
| | | |
| | | // private: |
| | | int TryLock() { return pthread_mutex_trylock(mtx()); } |
| | | int Lock() { return pthread_mutex_lock(mtx()); } |
| | | int Unlock() { return pthread_mutex_unlock(mtx()); } |
| | | |
| | | private: |
| | | pthread_mutex_t *mtx() { return &mutex_; } |
| | | pthread_mutex_t mutex_; |
| | | }; |
| | | |
| | | class LockFreeQueue |
| | | { |
| | | typedef int64_t Data; |
| | | typedef boost::lockfree::queue<Data, boost::lockfree::capacity<1024>> LFQueue; |
| | | void push_back(Data d) { queue_.push(d); } |
| | | |
| | | private: |
| | | LFQueue queue_; |
| | | }; |
| | | |
| | | } // namespace |
| | | #include <chrono> |
| | | using namespace std::chrono; |
| | | // using namespace std::chrono_literals; |
| | | |
| | | BOOST_AUTO_TEST_CASE(MutexTest) |
| | | { |
| | | // typedef robust::CasMutex<true> RobustMutex; |
| | | typedef MutexWithPidCheck RobustMutex; |
| | | |
| | | for (int i = 0; i < 20; ++i) { |
| | | int size = i; |
| | | int left = size & 7; |
| | | int rsize = size + ((8 - left) & 7); |
| | | printf("size: %3d, rsize: %3d\n", size, rsize); |
| | | } |
| | | SharedMemory &shm = TestShm(); |
| | | // shm.Remove(); |
| | | // return; |
| | |
| | | |
| | | const std::string mtx_name("test_mutex"); |
| | | const std::string int_name("test_int"); |
| | | auto mtx = shm.FindOrCreate<TLMutex>(mtx_name); |
| | | auto mtx = shm.FindOrCreate<RobustMutex>(mtx_name); |
| | | auto pi = shm.FindOrCreate<int>(int_name, 100); |
| | | |
| | | std::mutex m; |
| | |
| | | |
| | | { |
| | | boost::timer::auto_cpu_timer timer; |
| | | printf("test time: "); |
| | | TLMutex mutex; |
| | | // CasMutex mutex; |
| | | const int ntimes = 1000 * 1000; |
| | | printf("test lock/unlock %d times: ", ntimes); |
| | | RobustMutex mutex; |
| | | auto Lock = [&]() { |
| | | for (int i = 0; i < 10; ++i) { |
| | | for (int i = 0; i < ntimes; ++i) { |
| | | mutex.lock(); |
| | | mutex.unlock(); |
| | | } |
| | |
| | | std::thread t1(Lock), t2(Lock); |
| | | t1.join(); |
| | | t2.join(); |
| | | printf("mutex nlock: %ld, update time error: %ld, normal fail: %ld, error wait: %ld\n", |
| | | mutex.st_.nlock_, |
| | | mutex.st_.nupdate_time_fail, |
| | | mutex.st_.nfail, |
| | | mutex.st_.nexcept); |
| | | } |
| | | |
| | | auto MSFromNow = [](const int ms) { |
| | |
| | | threads.Launch(hb, &run); |
| | | threads.Launch(showStatus, &run); |
| | | int ncli = 10; |
| | | const uint64_t nreq = 1000 * 10; |
| | | const uint64_t nreq = 1000 * 100; |
| | | for (int i = 0; i < ncli; ++i) { |
| | | threads.Launch(asyncRequest, nreq); |
| | | } |
| | | // for (int i = 0; i < 100; ++i) { |
| | | // SyncRequest(0); |
| | | // } |
| | | |
| | | int same = 0; |
| | | int64_t last = 0; |
| | |
| | | threads.WaitAll(); |
| | | auto &st = Status(); |
| | | printf("nreq: %8ld, nsrv: %8ld, nreply: %8ld\n", st.nrequest_.load(), st.nserved_.load(), st.nreply_.load()); |
| | | BHCleanup(); |
| | | printf("after cleanup\n"); |
| | | } |