77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014, 2015.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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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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