2b72262b4f
I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
72 lines
2 KiB
C++
72 lines
2 KiB
C++
/*
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* Copyright (c) 2011, 2012, 2013, 2014, 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* sortix/kernel/dtable.h
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* Table of file descriptors.
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*/
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#ifndef SORTIX_DTABLE_H
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#define SORTIX_DTABLE_H
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#include <sortix/kernel/refcount.h>
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namespace Sortix {
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class Descriptor;
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typedef struct dtableent_struct
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{
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Ref<Descriptor> desc;
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int flags;
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} dtableent_t;
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class DescriptorTable : public Refcountable
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{
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public:
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DescriptorTable();
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virtual ~DescriptorTable();
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Ref<DescriptorTable> Fork();
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Ref<Descriptor> Get(int index);
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int Allocate(Ref<Descriptor> desc, int flags, int min_index = 0);
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int Allocate(int src_index, int flags, int min_index = 0);
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int Copy(int from, int to, int flags);
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void Free(int index);
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Ref<Descriptor> FreeKeep(int index);
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void OnExecute();
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bool SetFlags(int index, int flags);
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int GetFlags(int index);
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int Previous(int index);
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int Next(int index);
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int CloseFrom(int index);
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private:
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void Reset(); // Hey, reference counted. Don't call this.
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bool IsGoodEntry(int i);
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bool Enlargen(int atleast);
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int AllocateInternal(Ref<Descriptor> desc, int flags, int min_index);
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Ref<Descriptor> FreeKeepInternal(int index);
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private:
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kthread_mutex_t dtablelock;
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dtableent_t* entries;
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int numentries;
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int first_not_taken;
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};
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} // namespace Sortix
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#endif
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