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54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2026 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _H_I_EVENT_SOURCE_
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#define _H_I_EVENT_SOURCE_
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#include <stdbool.h>
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typedef bool (*LG_DSEventWake)(void * opaque);
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typedef bool (*LG_DSEventSubscribe)(void * opaque,
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LG_DSEventWake callback, void * callbackOpaque);
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typedef void (*LG_DSEventUnsubscribe)(void * opaque);
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typedef void (*LG_DSEventDispatch)(void * opaque);
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typedef struct LG_DSEventSource
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{
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void * opaque;
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LG_DSEventSubscribe subscribe;
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LG_DSEventUnsubscribe unsubscribe;
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LG_DSEventDispatch dispatch;
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}
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LG_DSEventSource;
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/* Notifications are coalesced until dispatch. The subscriber wake callback
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* must be nonblocking, must not call back into the source, and returns true
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* when the wake was delivered. Failed wakes may be retried by a later
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* notification. Unsubscribe is synchronous with any wake already in
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* progress. */
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static inline bool lgEventSourceValid(const LG_DSEventSource * source)
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{
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return source && source->subscribe && source->unsubscribe &&
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source->dispatch;
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}
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#endif
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