73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
/*
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* Copyright © 2018, VideoLAN and dav1d authors
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* Copyright © 2018, Two Orioles, LLC
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef DAV1D_SRC_REF_H
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#define DAV1D_SRC_REF_H
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#include "dav1d/dav1d.h"
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#include "src/mem.h"
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#include "src/thread.h"
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#include <stdatomic.h>
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#include <stddef.h>
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struct Dav1dRef {
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void *data;
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const void *const_data;
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atomic_int ref_cnt;
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int free_ref;
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void (*free_callback)(const uint8_t *data, void *user_data);
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void *user_data;
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};
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Dav1dRef *dav1d_ref_create(size_t size);
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Dav1dRef *dav1d_ref_create_using_pool(Dav1dMemPool *pool, size_t size);
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void dav1d_ref_dec(Dav1dRef **ref);
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static inline Dav1dRef *dav1d_ref_init(Dav1dRef *const ref, const void *const ptr,
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void (*const free_callback)(const uint8_t *data, void *user_data),
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void *const user_data, const int free_ref)
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{
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ref->data = NULL;
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ref->const_data = ptr;
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atomic_init(&ref->ref_cnt, 1);
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ref->free_ref = free_ref;
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ref->free_callback = free_callback;
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ref->user_data = user_data;
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return ref;
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}
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static inline void dav1d_ref_inc(Dav1dRef *const ref) {
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atomic_fetch_add_explicit(&ref->ref_cnt, 1, memory_order_relaxed);
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}
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static inline int dav1d_ref_is_writable(Dav1dRef *const ref) {
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return atomic_load(&ref->ref_cnt) == 1 && ref->data;
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}
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#endif /* DAV1D_SRC_REF_H */
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