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Diffstat (limited to 'vrt/include/vrt/rx.h')
| -rw-r--r-- | vrt/include/vrt/rx.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/vrt/include/vrt/rx.h b/vrt/include/vrt/rx.h new file mode 100644 index 000000000..ff3ce85fb --- /dev/null +++ b/vrt/include/vrt/rx.h @@ -0,0 +1,93 @@ +/* -*- c++ -*- */ +/* + * Copyright 2009 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ +#ifndef INCLUDED_VRT_RX_H +#define INCLUDED_VRT_RX_H + +#include <boost/shared_ptr.hpp> +#include <boost/utility.hpp> +#include <vrt/rx_packet_handler.h> + +namespace vrt { + + class socket_rx_buffer; + + /*! + * Relatively low-level interface to receive VRT packets over a datagram socket. + * + * (We'll refactor this if/when we use a non-UDP transport.) + * No VRT control issues are addressed here. + */ + class rx : boost::noncopyable + { + int d_socket_fd; + socket_rx_buffer *d_srb; + + public: + /*! + * Shared pointer to this class + */ + typedef boost::shared_ptr<rx> sptr; + + /*! + * \brief Static function to return an instance of rx as a shared pointer. + * + * \param socket_fd file descriptor that data grams will be received from. + * It is assumed that some higher-level control software + * opened the appropriate UDP socket for us. This object + * assumes management of the socket's lifetime. The + * socket will be closed when our destructor fires. + * + * \param rx_bufsize is a hint as to the number of bytes of memory + * to allocate for received ethernet frames (0 -> reasonable default) + */ + static sptr make(int socket_fd, size_t rx_bufsize = 0); + + /*! + * \param socket_fd file descriptor that data grams will be received from. + * It is assumed that some higher-level control software + * opened the appropriate UDP socket for us. This object + * assumes management of the socket's lifetime. The + * socket will be closed when our destructor fires. + * + * \param rx_bufsize is a hint as to the number of bytes of memory + * to allocate for received ethernet frames (0 -> reasonable default) + */ + rx(int socket_fd, size_t rx_bufsize = 0); + ~rx(); + + /*! + * \brief Receive packets from the given socket file descriptor. + * + * \p handler will be invoked for all available packets. + * Unless \p dont_wait is true, this function blocks until at + * least one packet has been processed. + */ + bool rx_packets(rx_packet_handler *handler, bool dont_wait = false); + + /* + * \returns the socket_fd. Useful for select or poll. + */ + int socket_fd() const { return d_socket_fd; } + }; + +} + +#endif /* INCLUDED_VRT_RX_H */ |