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45e1b5bce0
This allows us to set a callback to read a value out before it's about to be overwritten which can be useful for things like calculating a running average.
46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
/**
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* Looking Glass
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* Copyright (C) 2017-2021 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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#include <stddef.h>
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#include <stdbool.h>
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typedef struct RingBuffer * RingBuffer;
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RingBuffer ringbuffer_new(int length, size_t valueSize);
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void ringbuffer_free(RingBuffer * rb);
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void ringbuffer_push(RingBuffer rb, const void * value);
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void ringbuffer_reset(RingBuffer rb);
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int ringbuffer_getLength(const RingBuffer rb);
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int ringbuffer_getStart (const RingBuffer rb);
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int ringbuffer_getCount (const RingBuffer rb);
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void * ringbuffer_getValues(const RingBuffer rb);
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typedef void (*RingBufferValueFn)(void * value, void * udata);
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// set a function to call before a value is about to be overwritten
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void ringbuffer_setPreOverwriteFn(RingBuffer rb, RingBufferValueFn fn,
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void * udata);
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typedef bool (*RingBufferIterator)(int index, void * value, void * udata);
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void ringbuffer_forEach(const RingBuffer rb, RingBufferIterator fn,
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void * udata);
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