107 lines
2.1 KiB
C++
107 lines
2.1 KiB
C++
/*
|
|
* \brief I/O channel for sockets
|
|
* \author Josef Söntgen
|
|
* \date 2012-04-12
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2011-2012 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
|
|
#ifndef _NOUX__SOCKET_DESCRIPTOR_REGISTRY_H_
|
|
#define _NOUX__SOCKET_DESCRIPTOR_REGISTRY_H_
|
|
|
|
/* Noux includes */
|
|
#include <shared_pointer.h>
|
|
|
|
namespace Noux {
|
|
|
|
enum { MAX_SOCKET_DESCRIPTORS = 64 };
|
|
|
|
template<typename T>
|
|
class Socket_descriptor_registry
|
|
{
|
|
private:
|
|
|
|
struct {
|
|
bool allocated;
|
|
Shared_pointer<T> io_channel;
|
|
} _sds[MAX_SOCKET_DESCRIPTORS];
|
|
|
|
void _assign_sd(int sd, Shared_pointer<T> &io_channel)
|
|
{
|
|
_sds[sd].io_channel = io_channel;
|
|
_sds[sd].allocated = true;
|
|
}
|
|
|
|
bool _is_valid_sd(int sd) const
|
|
{
|
|
return (sd >= 0) && (sd < MAX_SOCKET_DESCRIPTORS);
|
|
}
|
|
|
|
void _reset_sd(int sd)
|
|
{
|
|
_sds[sd].io_channel = Shared_pointer<T>();
|
|
_sds[sd].allocated = false;
|
|
}
|
|
|
|
public:
|
|
Socket_descriptor_registry()
|
|
{
|
|
for (unsigned i = 0; i < MAX_SOCKET_DESCRIPTORS; i++)
|
|
_reset_sd(i);
|
|
}
|
|
|
|
int add_io_channel(Shared_pointer<T> io_channel, int sd = -1)
|
|
{
|
|
if (sd == -1) {
|
|
PERR("Could not allocate socket descriptor");
|
|
return -1;
|
|
}
|
|
|
|
if (!_is_valid_sd(sd)) {
|
|
PERR("Socket descriptor %d is out of range", sd);
|
|
return -2;
|
|
}
|
|
|
|
_assign_sd(sd, io_channel);
|
|
return sd;
|
|
}
|
|
|
|
void remove_io_channel(int sd)
|
|
{
|
|
if (!_is_valid_sd(sd))
|
|
PERR("Socket descriptor %d is out of range", sd);
|
|
else
|
|
_reset_sd(sd);
|
|
}
|
|
|
|
bool sd_in_use(int sd) const
|
|
{
|
|
return (_is_valid_sd(sd) && _sds[sd].allocated);
|
|
}
|
|
|
|
Shared_pointer<T> io_channel_by_sd(int sd) const
|
|
{
|
|
if (!sd_in_use(sd)) {
|
|
PWRN("Socket descriptor %d is not open", sd);
|
|
return Shared_pointer<T>();
|
|
}
|
|
|
|
return _sds[sd].io_channel;
|
|
}
|
|
|
|
static Socket_descriptor_registry<T> *instance()
|
|
{
|
|
static Socket_descriptor_registry<T> _sdr;
|
|
return &_sdr;
|
|
}
|
|
};
|
|
|
|
};
|
|
#endif /* _NOUX__SOCKET_DESCRIPTOR_REGISTRY_H_ */
|