1 /* Copyright (c) 2009, 2021, Oracle and/or its affiliates.
2 
3   This program is free software; you can redistribute it and/or modify
4   it under the terms of the GNU General Public License, version 2.0,
5   as published by the Free Software Foundation.
6 
7   This program is also distributed with certain software (including
8   but not limited to OpenSSL) that is licensed under separate terms,
9   as designated in a particular file or component or in included license
10   documentation.  The authors of MySQL hereby grant you an additional
11   permission to link the program and your derivative works with the
12   separately licensed software that they have included with MySQL.
13 
14   This program is distributed in the hope that it will be useful,
15   but WITHOUT ANY WARRANTY; without even the implied warranty of
16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17   GNU General Public License, version 2.0, for more details.
18 
19   You should have received a copy of the GNU General Public License
20   along with this program; if not, write to the Free Software Foundation,
21   51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
22 
23 #ifndef PFS_ATOMIC_H
24 #define PFS_ATOMIC_H
25 
26 /**
27   @file storage/perfschema/pfs_atomic.h
28   Atomic operations (declarations).
29 */
30 
31 #include <my_atomic.h>
32 
33 /** Helper for atomic operations. */
34 class PFS_atomic
35 {
36 public:
37   /** Atomic load. */
load_32(int32 * ptr)38   static inline int32 load_32(int32 *ptr)
39   {
40     return my_atomic_load32(ptr);
41   }
42 
43   /** Atomic load. */
load_64(int64 * ptr)44   static inline int64 load_64(int64 *ptr)
45   {
46     return my_atomic_load64(ptr);
47   }
48 
49   /** Atomic load. */
load_u32(uint32 * ptr)50   static inline uint32 load_u32(uint32 *ptr)
51   {
52     return (uint32) my_atomic_load32((int32*) ptr);
53   }
54 
55   /** Atomic load. */
load_u64(uint64 * ptr)56   static inline uint64 load_u64(uint64 *ptr)
57   {
58     return (uint64) my_atomic_load64((int64*) ptr);
59   }
60 
61   /** Atomic store. */
store_32(int32 * ptr,int32 value)62   static inline void store_32(int32 *ptr, int32 value)
63   {
64     my_atomic_store32(ptr, value);
65   }
66 
67   /** Atomic store. */
store_64(int64 * ptr,int64 value)68   static inline void store_64(int64 *ptr, int64 value)
69   {
70     my_atomic_store64(ptr, value);
71   }
72 
73   /** Atomic store. */
store_u32(uint32 * ptr,uint32 value)74   static inline void store_u32(uint32 *ptr, uint32 value)
75   {
76     my_atomic_store32((int32*) ptr, (int32) value);
77   }
78 
79   /** Atomic store. */
store_u64(uint64 * ptr,uint64 value)80   static inline void store_u64(uint64 *ptr, uint64 value)
81   {
82     my_atomic_store64((int64*) ptr, (int64) value);
83   }
84 
85   /** Atomic add. */
add_32(int32 * ptr,int32 value)86   static inline int32 add_32(int32 *ptr, int32 value)
87   {
88     return my_atomic_add32(ptr, value);
89   }
90 
91   /** Atomic add. */
add_64(int64 * ptr,int64 value)92   static inline int64 add_64(int64 *ptr, int64 value)
93   {
94     return my_atomic_add64(ptr, value);
95   }
96 
97   /** Atomic add. */
add_u32(uint32 * ptr,uint32 value)98   static inline uint32 add_u32(uint32 *ptr, uint32 value)
99   {
100     return (uint32) my_atomic_add32((int32*) ptr, (int32) value);
101   }
102 
103   /** Atomic add. */
add_u64(uint64 * ptr,uint64 value)104   static inline uint64 add_u64(uint64 *ptr, uint64 value)
105   {
106     return (uint64) my_atomic_add64((int64*) ptr, (int64) value);
107   }
108 
109   /** Atomic compare and swap. */
cas_32(int32 * ptr,int32 * old_value,int32 new_value)110   static inline bool cas_32(int32 *ptr, int32 *old_value,
111                             int32 new_value)
112   {
113     return my_atomic_cas32(ptr, old_value, new_value);
114   }
115 
116   /** Atomic compare and swap. */
cas_64(int64 * ptr,int64 * old_value,int64 new_value)117   static inline bool cas_64(int64 *ptr, int64 *old_value,
118                             int64 new_value)
119   {
120     return my_atomic_cas64(ptr, old_value, new_value);
121   }
122 
123   /** Atomic compare and swap. */
cas_u32(uint32 * ptr,uint32 * old_value,uint32 new_value)124   static inline bool cas_u32(uint32 *ptr, uint32 *old_value,
125                              uint32 new_value)
126   {
127     return my_atomic_cas32((int32*) ptr, (int32*) old_value,
128                            (uint32) new_value);
129   }
130 
131   /** Atomic compare and swap. */
cas_u64(uint64 * ptr,uint64 * old_value,uint64 new_value)132   static inline bool cas_u64(uint64 *ptr, uint64 *old_value,
133                              uint64 new_value)
134   {
135     return my_atomic_cas64((int64*) ptr, (int64*) old_value,
136                             (uint64) new_value);
137   }
138 };
139 
140 #endif
141 
142