fifo_peek.hh

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#ifndef __TLM_CORE_1_REQ_RSP_CHANNELS_FIFO_FIFO_PEEK_HH__
#define __TLM_CORE_1_REQ_RSP_CHANNELS_FIFO_FIFO_PEEK_HH__
 
namespace tlm
{
 
template <typename T>
inline T
tlm_fifo<T>::peek(tlm_tag<T> *) const
{
    while (is_empty()) {
        // call free-standing sc_core::wait(),
        // since sc_prim_channel::wait(.) is not const
        sc_core::wait(m_data_written_event);
    }
    return buffer.read_data();
}
 
template <typename T>
inline bool
tlm_fifo<T>::nb_peek(T &t) const
{
    if (used() < 1) {
        return false;
    }
 
    t = buffer.peek_data(0);
    return true;
}
 
template <typename T>
inline bool
tlm_fifo<T>::nb_peek(T &t, int n) const
{
    if (n >= used() || n < -1) {
        return false;
    }
 
    if (n == -1) {
        n = used() - 1;
    }
 
    t = buffer.peek_data(n);
    return true;
}
 
template <typename T>
inline bool
tlm_fifo<T>::nb_can_peek(tlm_tag<T> *) const
{
    return !is_empty();
}
 
template <typename T>
inline bool
tlm_fifo<T>::nb_poke(const T &t, int n)
{
    if (n >= used() || n < 0) {
        return false;
    }
 
    buffer.poke_data(n) = t;
    return true;
}
 
} // namespace tlm
 
#endif /* __TLM_CORE_1_REQ_RSP_CHANNELS_FIFO_FIFO_PEEK_HH__ */