83 lines
1.8 KiB
C++
83 lines
1.8 KiB
C++
/*
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* Copyright (c) 2012, 2014 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/poll.h
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* Kernel declarations for event polling.
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*/
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#ifndef _INCLUDE_SORTIX_KERNEL_POLL_H
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#define _INCLUDE_SORTIX_KERNEL_POLL_H
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#include <sortix/kernel/kthread.h>
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namespace Sortix {
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class PollChannel;
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class PollNode;
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class PollChannel
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{
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public:
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PollChannel();
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~PollChannel();
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void Signal(short events);
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void Register(PollNode* node);
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void Unregister(PollNode* node);
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private:
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void SignalUnlocked(short events);
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private:
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struct PollNode* first;
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struct PollNode* last;
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kthread_mutex_t channel_lock;
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kthread_cond_t no_pending_cond;
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};
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class PollNode
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{
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friend class PollChannel;
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public:
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PollNode() { next = NULL; prev = NULL; channel = NULL; master = this; slave = NULL; }
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~PollNode() { delete slave; }
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private:
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PollNode* next;
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PollNode* prev;
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public:
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PollChannel* channel;
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PollNode* master;
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PollNode* slave;
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public:
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kthread_mutex_t* wake_mutex;
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kthread_cond_t* wake_cond;
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short events;
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short revents;
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bool* woken;
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public:
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void Cancel();
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PollNode* CreateSlave();
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};
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} // namespace Sortix
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#endif
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