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| |
| #ifndef QT3DCORE_QBOUNDEDCIRCULARBUFFER_P_H |
| #define QT3DCORE_QBOUNDEDCIRCULARBUFFER_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists for the convenience |
| // of other Qt classes. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtCore/QReadWriteLock> |
| #include <QtCore/QReadLocker> |
| #include <QtCore/QSemaphore> |
| #include <QtCore/QtGlobal> |
| |
| #include <Qt3DCore/private/qcircularbuffer_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace Qt3DCore { |
| |
| template <class T> |
| class QBoundedCircularBuffer |
| { |
| public: |
| explicit QBoundedCircularBuffer(int capacity_) |
| : m_free( capacity_ ), |
| m_used( capacity_ ), |
| m_buffer( capacity_ ) |
| { |
| m_used.acquire(capacity_); |
| } |
| |
| int capacity() const { return m_buffer.capacity(); } |
| int freeSize() const { return m_free.available(); } |
| int size() const { return m_used.available(); } |
| bool isFull() const { return m_free.available() == 0; } |
| bool isEmpty() const { return m_used.available() == 0; } |
| |
| void push_back(const T &value) |
| { |
| m_free.acquire(); |
| QWriteLocker locker(&m_lock); |
| m_buffer.append(value); |
| locker.unlock(); |
| m_used.release(); |
| } |
| |
| void push(const T &t) { push_back(t); } |
| void append(const T &t) { push_back(t); } |
| |
| T pop_front() |
| { |
| m_used.acquire(); |
| QWriteLocker locker(&m_lock); |
| T value = m_buffer.first(); |
| m_buffer.remove(0); |
| locker.unlock(); |
| m_free.release(); |
| return value; |
| } |
| |
| T pop() { return pop_front(); } |
| T takeFirst() { return pop_front(); } |
| |
| void clear() |
| { |
| QWriteLocker locker(&m_lock); |
| m_buffer.clear(); |
| int used = m_used.available(); |
| m_free.release(used); |
| m_used.acquire(used); |
| } |
| |
| T at(int i) const |
| { |
| QReadLocker readLocker(&m_lock); |
| return m_buffer.at(i); |
| } |
| |
| T front() const |
| { |
| QReadLocker readLocker(&m_lock); |
| return m_buffer.front(); |
| } |
| |
| T back() const |
| { |
| QReadLocker readLocker(&m_lock); |
| return m_buffer.back(); |
| } |
| |
| protected: |
| Q_DISABLE_COPY(QBoundedCircularBuffer) |
| |
| QSemaphore m_free; |
| QSemaphore m_used; |
| QCircularBuffer<T> m_buffer; |
| mutable QReadWriteLock m_lock; |
| }; |
| |
| } //Qt3D |
| |
| QT_END_NAMESPACE |
| |
| #endif // QT3DCORE_QBOUNDEDCIRCULARBUFFER_P_H |