2 * Original code from jemalloc with this license:
4 * Copyright (C) 2002-2013 Jason Evans <jasone@canonware.com>.
6 * Copyright (C) 2007-2012 Mozilla Foundation. All rights reserved.
7 * Copyright (C) 2009-2013 Facebook, Inc. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 * 1. Redistributions of source code must retain the above copyright notice(s),
12 * this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright notice(s),
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY EXPRESS
18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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27 * This program is free software; you can redistribute it and/or
28 * modify it under the terms of the GNU General Public License
29 * as published by the Free Software Foundation; either version 2
30 * of the License, or (at your option) any later version.
32 * This program is distributed in the hope that it will be useful,
33 * but WITHOUT ANY WARRANTY; without even the implied warranty of
34 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
35 * GNU General Public License for more details.
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39 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
41 * The Original Code is Copyright (C) 2016 Blender Foundation.
42 * All rights reserved.
44 * The Original Code is: adapted from jemalloc.
50 * \brief Provides wrapper around system-specific atomic primitives,
51 * and some extensions (faked-atomic operations over float numbers).
54 #ifndef __ATOMIC_OPS_H__
55 #define __ATOMIC_OPS_H__
58 /* Attempt to fix compilation error on Debian armel kernel.
59 * arm7 architecture does have both 32 and 64bit atomics, however
60 * it's gcc doesn't have __GCC_HAVE_SYNC_COMPARE_AND_SWAP_n defined.
62 # define JE_FORCE_SYNC_COMPARE_AND_SWAP_1
63 # define JE_FORCE_SYNC_COMPARE_AND_SWAP_4
64 # define JE_FORCE_SYNC_COMPARE_AND_SWAP_8
67 #include "intern/atomic_ops_utils.h"
69 /******************************************************************************/
70 /* Function prototypes. */
72 #if (LG_SIZEOF_PTR == 8 || LG_SIZEOF_INT == 8)
73 ATOMIC_INLINE uint64_t atomic_add_and_fetch_uint64(uint64_t *p, uint64_t x);
74 ATOMIC_INLINE uint64_t atomic_sub_and_fetch_uint64(uint64_t *p, uint64_t x);
75 ATOMIC_INLINE uint64_t atomic_fetch_and_add_uint64(uint64_t *p, uint64_t x);
76 ATOMIC_INLINE uint64_t atomic_fetch_and_sub_uint64(uint64_t *p, uint64_t x);
77 ATOMIC_INLINE uint64_t atomic_cas_uint64(uint64_t *v, uint64_t old, uint64_t _new);
79 ATOMIC_INLINE int64_t atomic_add_and_fetch_int64(int64_t *p, int64_t x);
80 ATOMIC_INLINE int64_t atomic_sub_and_fetch_int64(int64_t *p, int64_t x);
81 ATOMIC_INLINE int64_t atomic_fetch_and_add_int64(int64_t *p, int64_t x);
82 ATOMIC_INLINE int64_t atomic_fetch_and_sub_int64(int64_t *p, int64_t x);
83 ATOMIC_INLINE int64_t atomic_cas_int64(int64_t *v, int64_t old, int64_t _new);
86 ATOMIC_INLINE uint32_t atomic_add_and_fetch_uint32(uint32_t *p, uint32_t x);
87 ATOMIC_INLINE uint32_t atomic_sub_and_fetch_uint32(uint32_t *p, uint32_t x);
88 ATOMIC_INLINE uint32_t atomic_cas_uint32(uint32_t *v, uint32_t old, uint32_t _new);
90 ATOMIC_INLINE uint32_t atomic_fetch_and_add_uint32(uint32_t *p, uint32_t x);
91 ATOMIC_INLINE uint32_t atomic_fetch_and_or_uint32(uint32_t *p, uint32_t x);
92 ATOMIC_INLINE uint32_t atomic_fetch_and_and_uint32(uint32_t *p, uint32_t x);
94 ATOMIC_INLINE int32_t atomic_add_and_fetch_int32(int32_t *p, int32_t x);
95 ATOMIC_INLINE int32_t atomic_sub_and_fetch_int32(int32_t *p, int32_t x);
96 ATOMIC_INLINE int32_t atomic_cas_int32(int32_t *v, int32_t old, int32_t _new);
98 ATOMIC_INLINE int32_t atomic_fetch_and_add_int32(int32_t *p, int32_t x);
99 ATOMIC_INLINE int32_t atomic_fetch_and_or_int32(int32_t *p, int32_t x);
100 ATOMIC_INLINE int32_t atomic_fetch_and_and_int32(int32_t *p, int32_t x);
102 ATOMIC_INLINE uint8_t atomic_fetch_and_or_uint8(uint8_t *p, uint8_t b);
103 ATOMIC_INLINE uint8_t atomic_fetch_and_and_uint8(uint8_t *p, uint8_t b);
105 ATOMIC_INLINE int8_t atomic_fetch_and_or_int8(int8_t *p, int8_t b);
106 ATOMIC_INLINE int8_t atomic_fetch_and_and_int8(int8_t *p, int8_t b);
108 ATOMIC_INLINE char atomic_fetch_and_or_char(char *p, char b);
109 ATOMIC_INLINE char atomic_fetch_and_and_char(char *p, char b);
111 ATOMIC_INLINE size_t atomic_add_and_fetch_z(size_t *p, size_t x);
112 ATOMIC_INLINE size_t atomic_sub_and_fetch_z(size_t *p, size_t x);
113 ATOMIC_INLINE size_t atomic_fetch_and_add_z(size_t *p, size_t x);
114 ATOMIC_INLINE size_t atomic_fetch_and_sub_z(size_t *p, size_t x);
115 ATOMIC_INLINE size_t atomic_cas_z(size_t *v, size_t old, size_t _new);
116 ATOMIC_INLINE size_t atomic_fetch_and_update_max_z(size_t *p, size_t x); /* Uses CAS loop, see warning below. */
118 ATOMIC_INLINE unsigned int atomic_add_and_fetch_u(unsigned int *p, unsigned int x);
119 ATOMIC_INLINE unsigned int atomic_sub_and_fetch_u(unsigned int *p, unsigned int x);
120 ATOMIC_INLINE unsigned int atomic_fetch_and_add_u(unsigned int *p, unsigned int x);
121 ATOMIC_INLINE unsigned int atomic_fetch_and_sub_u(unsigned int *p, unsigned int x);
122 ATOMIC_INLINE unsigned int atomic_cas_u(unsigned int *v, unsigned int old, unsigned int _new);
124 ATOMIC_INLINE void *atomic_cas_ptr(void **v, void *old, void *_new);
127 ATOMIC_INLINE float atomic_cas_float(float *v, float old, float _new);
129 /* WARNING! Float 'atomics' are really faked ones, those are actually closer to some kind of spinlock-sync'ed operation,
130 * which means they are only efficient if collisions are highly unlikely (i.e. if probability of two threads
131 * working on the same pointer at the same time is very low). */
132 ATOMIC_INLINE float atomic_add_and_fetch_fl(float *p, const float x);
134 /******************************************************************************/
135 /* Include system-dependent implementations. */
137 /* Note that we are using _unix flavor as fallback here (it will raise precompiler errors as needed). */
138 #if defined(_MSC_VER)
139 # include "intern/atomic_ops_msvc.h"
141 # include "intern/atomic_ops_unix.h"
144 /* Include 'fake' atomic extensions, built over real atomic primitives. */
145 #include "intern/atomic_ops_ext.h"
147 #endif /* __ATOMIC_OPS_H__ */