2011-12-22 15:19:25 +00:00
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/*
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* \brief file descriptor allocator interface
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* \author Christian Prochaska
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* \date 2010-01-21
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*
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*/
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/*
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2012-01-03 14:35:05 +00:00
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* Copyright (C) 2010-2012 Genode Labs GmbH
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2011-12-22 15:19:25 +00:00
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _LIBC_PLUGIN__FD_ALLOC_H_
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#define _LIBC_PLUGIN__FD_ALLOC_H_
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#include <base/allocator_avl.h>
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#include <libc-plugin/plugin.h>
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enum { MAX_NUM_FDS = 1024 };
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namespace Libc {
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/**
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* Plugin-specific file-descriptor context
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*/
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class Plugin_context { };
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struct File_descriptor
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{
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int libc_fd;
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Plugin *plugin;
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Plugin_context *context;
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};
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class File_descriptor_allocator : Allocator_avl_tpl<File_descriptor>
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{
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public:
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/**
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* Constructor
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*/
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File_descriptor_allocator();
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/**
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* Allocate file descriptor
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*/
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File_descriptor *alloc(Plugin *plugin, Plugin_context *context, int libc_fd = -1);
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/**
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* Release file descriptor
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*/
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void free(File_descriptor *fdo);
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File_descriptor *find_by_libc_fd(int libc_fd);
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};
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/**
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* Return singleton instance of file-descriptor allocator
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*/
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extern File_descriptor_allocator *file_descriptor_allocator();
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}
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#endif /* _LIBC_PLUGIN__FD_ALLOC_H_ */
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