| | |
| | | #include "shm_allocator.h" |
| | | #include "psem.h" |
| | | #include "bus_error.h" |
| | | |
| | | #include "bus_def.h" |
| | | // default Queue size |
| | | #define LOCK_FREE_Q_DEFAULT_SIZE 16 |
| | | |
| | |
| | | typename Allocator = SHM_Allocator, |
| | | template <typename T, typename AT> class Q_TYPE = ArrayLockFreeQueue |
| | | > |
| | | class LockFreeQueue |
| | | { |
| | | class LockFreeQueue { |
| | | |
| | | private: |
| | | sem_t slots; |
| | | sem_t items; |
| | | |
| | | |
| | | |
| | | public: |
| | | sem_t mutex; |
| | | |
| | | LockFreeQueue(size_t qsize = LOCK_FREE_Q_DEFAULT_SIZE); |
| | | |
| | | /// @brief destructor of the class. |
| | | /// Note it is not virtual since it is not expected to inherit from this |
| | | /// template |
| | | ~LockFreeQueue(); |
| | | |
| | | std::atomic_uint reference; |
| | | /// @brief constructor of the class |
| | | |
| | |
| | | /// structures to be inserted in the queue you should think of instantiate the template |
| | | /// of the queue as a pointer to that large structure |
| | | /// @return true if the element was inserted in the queue. False if the queue was full |
| | | int push(const ELEM_T &a_data); |
| | | int push_nowait(const ELEM_T &a_data); |
| | | int push_timeout(const ELEM_T &a_data, const struct timespec * timeout); |
| | | int push(const ELEM_T &a_data, const struct timespec *timeout = NULL, int flag = 0); |
| | | |
| | | /// @brief pop the element at the head of the queue |
| | | /// @param a reference where the element in the head of the queue will be saved to |
| | | /// Note that the a_data parameter might contain rubbish if the function returns false |
| | | /// @return true if the element was successfully extracted from the queue. False if the queue was empty |
| | | int pop(ELEM_T &a_data); |
| | | int pop_nowait(ELEM_T &a_data); |
| | | int pop_timeout(ELEM_T &a_data, struct timespec * timeout); |
| | | int pop(ELEM_T &a_data, const struct timespec *timeout = NULL, int flag = 0); |
| | | |
| | | |
| | | void *operator new(size_t size); |
| | | |
| | | void operator delete(void *p); |
| | | |
| | | protected: |
| | |
| | | typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::LockFreeQueue(size_t qsize): reference(0), m_qImpl(qsize) |
| | | { |
| | | LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::LockFreeQueue(size_t qsize): reference(0), m_qImpl(qsize) { |
| | | // std::cout << "LockFreeQueue init reference=" << reference << std::endl; |
| | | if (sem_init(&slots, 1, qsize) == -1) |
| | | err_exit(errno, "LockFreeQueue sem_init"); |
| | |
| | | |
| | | } |
| | | |
| | | |
| | | template < |
| | | typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::~LockFreeQueue() |
| | | { |
| | | LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::~LockFreeQueue() { |
| | | // LoggerFactory::getLogger()->debug("LockFreeQueue desctroy"); |
| | | if(sem_destroy(&slots) == -1) { |
| | | err_exit(errno, "LockFreeQueue sem_destroy"); |
| | |
| | | typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | inline uint32_t LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::size() |
| | | { |
| | | inline uint32_t LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::size() { |
| | | return m_qImpl.size(); |
| | | } |
| | | |
| | |
| | | typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | inline bool LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::full() |
| | | { |
| | | inline bool LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::full() { |
| | | return m_qImpl.full(); |
| | | } |
| | | |
| | |
| | | typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | inline bool LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::empty() |
| | | { |
| | | inline bool LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::empty() { |
| | | return m_qImpl.empty(); |
| | | } |
| | | |
| | | |
| | | template < |
| | | typename ELEM_T, |
| | | template<typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | int LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::push(const ELEM_T &a_data) |
| | | { |
| | | int LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::push(const ELEM_T &a_data, const struct timespec *timeout, int flag) { |
| | | LoggerFactory::getLogger()->debug("==================LockFreeQueue push before\n"); |
| | | if ((flag & BUS_NOWAIT_FLAG) == BUS_NOWAIT_FLAG) { |
| | | if (psem_trywait(&slots) == -1) { |
| | | return -1; |
| | | } |
| | | } else if ((flag & BUS_TIMEOUT_FLAG) == BUS_TIMEOUT_FLAG && timeout != NULL) { |
| | | if (psem_timedwait(&slots, timeout) == -1) { |
| | | return -1; |
| | | } |
| | | } else { |
| | | if (psem_wait(&slots) == -1) { |
| | | return -1; |
| | | } |
| | | } |
| | | |
| | | |
| | | if ( m_qImpl.push(a_data) ) { |
| | | psem_post(&items); |
| | |
| | | |
| | | } |
| | | |
| | | template < |
| | | typename ELEM_T, |
| | | template<typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | int LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::push_nowait(const ELEM_T &a_data) |
| | | { |
| | | if (psem_trywait(&slots) == -1) { |
| | | return -1; |
| | | } |
| | | |
| | | if ( m_qImpl.push(a_data)) { |
| | | psem_post(&items); |
| | | return 0; |
| | | } |
| | | return -1; |
| | | |
| | | } |
| | | |
| | | template < |
| | | typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | int LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::push_timeout(const ELEM_T &a_data, const struct timespec * ts) |
| | | { |
| | | LoggerFactory::getLogger()->debug("==================LockFreeQueue push_timeout before\n"); |
| | | if ( psem_timedwait(&slots, ts) == -1) { |
| | | return -1; |
| | | } |
| | | |
| | | if (m_qImpl.push(a_data)){ |
| | | psem_post(&items); |
| | | LoggerFactory::getLogger()->debug("==================LockFreeQueue push_timeout after\n"); |
| | | return 0; |
| | | } |
| | | return -1; |
| | | |
| | | } |
| | | |
| | | |
| | | |
| | | |
| | | template < |
| | | typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | int LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::pop(ELEM_T &a_data) |
| | | { |
| | | int LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::pop(ELEM_T &a_data, const struct timespec *timeout, int flag) { |
| | | |
| | | LoggerFactory::getLogger()->debug("==================LockFreeQueue pop before\n"); |
| | | |
| | | |
| | | if ((flag & BUS_NOWAIT_FLAG) == BUS_NOWAIT_FLAG) { |
| | | if (psem_trywait(&items) == -1) { |
| | | return -1; |
| | | } |
| | | } else if ((flag & BUS_TIMEOUT_FLAG) == BUS_TIMEOUT_FLAG && timeout != NULL) { |
| | | if (psem_timedwait(&items, timeout) == -1) { |
| | | return -1; |
| | | } |
| | | } else { |
| | | if (psem_wait(&items) == -1) { |
| | | return -1; |
| | | } |
| | | } |
| | | |
| | | |
| | | if (m_qImpl.pop(a_data)) { |
| | | psem_post(&slots); |
| | |
| | | return -1; |
| | | } |
| | | |
| | | template < |
| | | typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | int LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::pop_nowait(ELEM_T &a_data) |
| | | { |
| | | if (psem_trywait(&items) == -1) { |
| | | return -1; |
| | | } |
| | | |
| | | if (m_qImpl.pop(a_data)) { |
| | | psem_post(&slots); |
| | | return 0; |
| | | } |
| | | return -1; |
| | | } |
| | | |
| | | |
| | | template < |
| | | typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | int LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::pop_timeout(ELEM_T &a_data, struct timespec * ts) |
| | | { |
| | | if (psem_timedwait(&items, ts) == -1) { |
| | | return -1; |
| | | } |
| | | |
| | | if (m_qImpl.pop(a_data)) { |
| | | psem_post(&slots); |
| | | // LoggerFactory::getLogger()->debug("==================LockFreeQueue pop_timeout after\n"); |
| | | return 0; |
| | | } |
| | | return -1; |
| | | |
| | | } |
| | | |
| | | template < |
| | | typename ELEM_T, |
| | | template<typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | ELEM_T& LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::operator[](unsigned i) { |
| | |
| | | } |
| | | |
| | | |
| | | template < |
| | | typename ELEM_T, |
| | | template<typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | void * LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::operator new(size_t size){ |
| | | return Allocator::allocate(size); |
| | | } |
| | | |
| | | template < |
| | | typename ELEM_T, |
| | | template<typename ELEM_T, |
| | | typename Allocator, |
| | | template <typename T, typename AT> class Q_TYPE> |
| | | void LockFreeQueue<ELEM_T, Allocator, Q_TYPE>::operator delete(void *p) { |