ref.h (2815B)
1 /* 2 * Copyright © 2018, VideoLAN and dav1d authors 3 * Copyright © 2018, Two Orioles, LLC 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright notice, this 10 * list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef DAV1D_SRC_REF_H 29 #define DAV1D_SRC_REF_H 30 31 #include "dav1d/dav1d.h" 32 33 #include "src/mem.h" 34 #include "src/thread.h" 35 36 #include <stdatomic.h> 37 #include <stddef.h> 38 39 struct Dav1dRef { 40 void *data; 41 const void *const_data; 42 atomic_int ref_cnt; 43 int free_ref; 44 void (*free_callback)(const uint8_t *data, void *user_data); 45 void *user_data; 46 }; 47 48 #if !TRACK_HEAP_ALLOCATIONS 49 #define dav1d_ref_create(type, size) dav1d_ref_create(size) 50 #endif 51 52 Dav1dRef *dav1d_ref_create(enum AllocationType type, size_t size); 53 Dav1dRef *dav1d_ref_create_using_pool(Dav1dMemPool *pool, size_t size); 54 void dav1d_ref_dec(Dav1dRef **ref); 55 56 static inline Dav1dRef *dav1d_ref_init(Dav1dRef *const ref, const void *const ptr, 57 void (*const free_callback)(const uint8_t *data, void *user_data), 58 void *const user_data, const int free_ref) 59 { 60 ref->data = NULL; 61 ref->const_data = ptr; 62 atomic_init(&ref->ref_cnt, 1); 63 ref->free_ref = free_ref; 64 ref->free_callback = free_callback; 65 ref->user_data = user_data; 66 return ref; 67 } 68 69 static inline void dav1d_ref_inc(Dav1dRef *const ref) { 70 atomic_fetch_add_explicit(&ref->ref_cnt, 1, memory_order_relaxed); 71 } 72 73 static inline int dav1d_ref_is_writable(Dav1dRef *const ref) { 74 return atomic_load(&ref->ref_cnt) == 1 && ref->data; 75 } 76 77 #endif /* DAV1D_SRC_REF_H */