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.
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10 * modification, are permitted provided that the following conditions are met:
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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.
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22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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28 * ***** BEGIN GPL LICENSE BLOCK *****
30 * This program is free software; you can redistribute it and/or
31 * modify it under the terms of the GNU General Public License
32 * as published by the Free Software Foundation; either version 2
33 * of the License, or (at your option) any later version.
35 * This program is distributed in the hope that it will be useful,
36 * but WITHOUT ANY WARRANTY; without even the implied warranty of
37 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
38 * GNU General Public License for more details.
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42 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
44 * The Original Code is Copyright (C) 2016 Blender Foundation.
45 * All rights reserved.
47 * The Original Code is: adapted from jemalloc.
49 * ***** END GPL LICENSE BLOCK *****
56 * \author Copyright (C) 2016 Blender Foundation, adapted from jemalloc.
57 * \brief Provides wrapper around system-specific atomic primitives, and some extensions (faked-atomic operations
58 * over float numbers).
61 #ifndef __ATOMIC_OPS_H__
62 #define __ATOMIC_OPS_H__
65 /* Attempt to fix compilation error on Debian armel kernel.
66 * arm7 architecture does have both 32 and 64bit atomics, however
67 * it's gcc doesn't have __GCC_HAVE_SYNC_COMPARE_AND_SWAP_n defined.
69 # define JE_FORCE_SYNC_COMPARE_AND_SWAP_1
70 # define JE_FORCE_SYNC_COMPARE_AND_SWAP_4
71 # define JE_FORCE_SYNC_COMPARE_AND_SWAP_8
74 #include "intern/atomic_ops_utils.h"
76 /******************************************************************************/
77 /* Function prototypes. */
79 #if (LG_SIZEOF_PTR == 8 || LG_SIZEOF_INT == 8)
80 ATOMIC_INLINE uint64_t atomic_add_and_fetch_uint64(uint64_t *p, uint64_t x);
81 ATOMIC_INLINE uint64_t atomic_sub_and_fetch_uint64(uint64_t *p, uint64_t x);
82 ATOMIC_INLINE uint64_t atomic_fetch_and_add_uint64(uint64_t *p, uint64_t x);
83 ATOMIC_INLINE uint64_t atomic_fetch_and_sub_uint64(uint64_t *p, uint64_t x);
84 ATOMIC_INLINE uint64_t atomic_cas_uint64(uint64_t *v, uint64_t old, uint64_t _new);
86 ATOMIC_INLINE int64_t atomic_add_and_fetch_int64(int64_t *p, int64_t x);
87 ATOMIC_INLINE int64_t atomic_sub_and_fetch_int64(int64_t *p, int64_t x);
88 ATOMIC_INLINE int64_t atomic_fetch_and_add_int64(int64_t *p, int64_t x);
89 ATOMIC_INLINE int64_t atomic_fetch_and_sub_int64(int64_t *p, int64_t x);
90 ATOMIC_INLINE int64_t atomic_cas_int64(int64_t *v, int64_t old, int64_t _new);
93 ATOMIC_INLINE uint32_t atomic_add_and_fetch_uint32(uint32_t *p, uint32_t x);
94 ATOMIC_INLINE uint32_t atomic_sub_and_fetch_uint32(uint32_t *p, uint32_t x);
95 ATOMIC_INLINE uint32_t atomic_cas_uint32(uint32_t *v, uint32_t old, uint32_t _new);
97 ATOMIC_INLINE uint32_t atomic_fetch_and_add_uint32(uint32_t *p, uint32_t x);
98 ATOMIC_INLINE uint32_t atomic_fetch_and_or_uint32(uint32_t *p, uint32_t x);
99 ATOMIC_INLINE uint32_t atomic_fetch_and_and_uint32(uint32_t *p, uint32_t x);
101 ATOMIC_INLINE int32_t atomic_add_and_fetch_int32(int32_t *p, int32_t x);
102 ATOMIC_INLINE int32_t atomic_sub_and_fetch_int32(int32_t *p, int32_t x);
103 ATOMIC_INLINE int32_t atomic_cas_int32(int32_t *v, int32_t old, int32_t _new);
105 ATOMIC_INLINE int32_t atomic_fetch_and_add_int32(int32_t *p, int32_t x);
106 ATOMIC_INLINE int32_t atomic_fetch_and_or_int32(int32_t *p, int32_t x);
107 ATOMIC_INLINE int32_t atomic_fetch_and_and_int32(int32_t *p, int32_t x);
109 ATOMIC_INLINE uint8_t atomic_fetch_and_or_uint8(uint8_t *p, uint8_t b);
110 ATOMIC_INLINE uint8_t atomic_fetch_and_and_uint8(uint8_t *p, uint8_t b);
112 ATOMIC_INLINE int8_t atomic_fetch_and_or_int8(int8_t *p, int8_t b);
113 ATOMIC_INLINE int8_t atomic_fetch_and_and_int8(int8_t *p, int8_t b);
115 ATOMIC_INLINE char atomic_fetch_and_or_char(char *p, char b);
116 ATOMIC_INLINE char atomic_fetch_and_and_char(char *p, char b);
118 ATOMIC_INLINE size_t atomic_add_and_fetch_z(size_t *p, size_t x);
119 ATOMIC_INLINE size_t atomic_sub_and_fetch_z(size_t *p, size_t x);
120 ATOMIC_INLINE size_t atomic_fetch_and_add_z(size_t *p, size_t x);
121 ATOMIC_INLINE size_t atomic_fetch_and_sub_z(size_t *p, size_t x);
122 ATOMIC_INLINE size_t atomic_cas_z(size_t *v, size_t old, size_t _new);
123 ATOMIC_INLINE size_t atomic_fetch_and_update_max_z(size_t *p, size_t x); /* Uses CAS loop, see warning below. */
125 ATOMIC_INLINE unsigned int atomic_add_and_fetch_u(unsigned int *p, unsigned int x);
126 ATOMIC_INLINE unsigned int atomic_sub_and_fetch_u(unsigned int *p, unsigned int x);
127 ATOMIC_INLINE unsigned int atomic_fetch_and_add_u(unsigned int *p, unsigned int x);
128 ATOMIC_INLINE unsigned int atomic_fetch_and_sub_u(unsigned int *p, unsigned int x);
129 ATOMIC_INLINE unsigned int atomic_cas_u(unsigned int *v, unsigned int old, unsigned int _new);
131 ATOMIC_INLINE void *atomic_cas_ptr(void **v, void *old, void *_new);
134 ATOMIC_INLINE float atomic_cas_float(float *v, float old, float _new);
136 /* WARNING! Float 'atomics' are really faked ones, those are actually closer to some kind of spinlock-sync'ed operation,
137 * which means they are only efficient if collisions are highly unlikely (i.e. if probability of two threads
138 * working on the same pointer at the same time is very low). */
139 ATOMIC_INLINE float atomic_add_and_fetch_fl(float *p, const float x);
141 /******************************************************************************/
142 /* Include system-dependent implementations. */
144 /* Note that we are using _unix flavor as fallback here (it will raise precompiler errors as needed). */
145 #if defined(_MSC_VER)
146 # include "intern/atomic_ops_msvc.h"
148 # include "intern/atomic_ops_unix.h"
151 /* Include 'fake' atomic extensions, built over real atomic primitives. */
152 #include "intern/atomic_ops_ext.h"
154 #endif /* __ATOMIC_OPS_H__ */