mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-27 09:12:32 +00:00
70 lines
1.2 KiB
C++
70 lines
1.2 KiB
C++
/*
|
|
* \brief file descriptor allocator interface
|
|
* \author Christian Prochaska
|
|
* \date 2010-01-21
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2010-2011 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 _LIBC_PLUGIN__FD_ALLOC_H_
|
|
#define _LIBC_PLUGIN__FD_ALLOC_H_
|
|
|
|
#include <base/allocator_avl.h>
|
|
|
|
#include <libc-plugin/plugin.h>
|
|
|
|
enum { MAX_NUM_FDS = 1024 };
|
|
|
|
namespace Libc {
|
|
|
|
/**
|
|
* Plugin-specific file-descriptor context
|
|
*/
|
|
class Plugin_context { };
|
|
|
|
|
|
struct File_descriptor
|
|
{
|
|
int libc_fd;
|
|
Plugin *plugin;
|
|
Plugin_context *context;
|
|
};
|
|
|
|
|
|
class File_descriptor_allocator : Allocator_avl_tpl<File_descriptor>
|
|
{
|
|
public:
|
|
|
|
/**
|
|
* Constructor
|
|
*/
|
|
File_descriptor_allocator();
|
|
|
|
/**
|
|
* Allocate file descriptor
|
|
*/
|
|
File_descriptor *alloc(Plugin *plugin, Plugin_context *context, int libc_fd = -1);
|
|
|
|
/**
|
|
* Release file descriptor
|
|
*/
|
|
void free(File_descriptor *fdo);
|
|
|
|
File_descriptor *find_by_libc_fd(int libc_fd);
|
|
};
|
|
|
|
|
|
/**
|
|
* Return singleton instance of file-descriptor allocator
|
|
*/
|
|
extern File_descriptor_allocator *file_descriptor_allocator();
|
|
}
|
|
|
|
#endif /* _LIBC_PLUGIN__FD_ALLOC_H_ */
|