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//
// Copyright 2010 Ettus Research LLC
//
// This program 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 of the License, or
// (at your option) any later version.
//
// This program 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, see <http://www.gnu.org/licenses/>.
//
#include <uhd/transport/zero_copy.hpp>
using namespace uhd::transport;
/***********************************************************************
* Safe managed receive buffer
**********************************************************************/
static void release_nop(void){
/* NOP */
}
class safe_managed_receive_buffer : public managed_recv_buffer{
public:
safe_managed_receive_buffer(
const boost::asio::const_buffer &buff,
const release_fcn_t &release_fcn
):
_buff(buff), _release_fcn(release_fcn)
{
/* NOP */
}
~safe_managed_receive_buffer(void){
_release_fcn();
}
void release(void){
release_fcn_t release_fcn = _release_fcn;
_release_fcn = &release_nop;
return release_fcn();
}
private:
const boost::asio::const_buffer &get(void) const{
return _buff;
}
const boost::asio::const_buffer _buff;
release_fcn_t _release_fcn;
};
managed_recv_buffer::sptr managed_recv_buffer::make_safe(
const boost::asio::const_buffer &buff,
const release_fcn_t &release_fcn
){
return sptr(new safe_managed_receive_buffer(buff, release_fcn));
}
/***********************************************************************
* Safe managed send buffer
**********************************************************************/
static void commit_nop(size_t){
/* NOP */
}
class safe_managed_send_buffer : public managed_send_buffer{
public:
safe_managed_send_buffer(
const boost::asio::mutable_buffer &buff,
const commit_fcn_t &commit_fcn
):
_buff(buff), _commit_fcn(commit_fcn)
{
/* NOP */
}
~safe_managed_send_buffer(void){
_commit_fcn(0);
}
void commit(size_t num_bytes){
commit_fcn_t commit_fcn = _commit_fcn;
_commit_fcn = &commit_nop;
return commit_fcn(num_bytes);
}
private:
const boost::asio::mutable_buffer &get(void) const{
return _buff;
}
const boost::asio::mutable_buffer _buff;
commit_fcn_t _commit_fcn;
};
safe_managed_send_buffer::sptr managed_send_buffer::make_safe(
const boost::asio::mutable_buffer &buff,
const commit_fcn_t &commit_fcn
){
return sptr(new safe_managed_send_buffer(buff, commit_fcn));
}
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