Mercurial > sdl-ios-xcode

annotate include/SDL_atomic.h @ 4902:50d0bff24d81

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Make the union nameless to reduce the complexity of the API. (Are there any compilers still in use that don't support this?)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 29 Sep 2010 21:13:52 -0700
parents 119023057881
children 3a95a2b93eb3
rev   line source
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
1 /*
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
2 SDL - Simple DirectMedia Layer
3697
f7b03b6838cb Fixed bug #926
Sam Lantinga <slouken@libsdl.org>
parents: 3407
diff changeset
3 Copyright (C) 1997-2010 Sam Lantinga
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
4
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
5 This library is free software; you can redistribute it and/or
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
6 modify it under the terms of the GNU Lesser General Public
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
7 License as published by the Free Software Foundation; either
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
8 version 2.1 of the License, or (at your option) any later version.
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
9
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
10 This library is distributed in the hope that it will be useful,
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
13 Lesser General Public License for more details.
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
14
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
15 You should have received a copy of the GNU Lesser General Public
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
16 License along with this library; if not, write to the Free Software
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
18
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
19 Sam Lantinga
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
20 slouken@libsdl.org
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
21
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
22 Contributed by Bob Pendleton, bob@pendleton.com
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
23 */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
24
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
25 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
26 * \file SDL_atomic.h
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
27 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
28 * Atomic operations.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
29 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
30 * These operations may, or may not, actually be implemented using
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
31 * processor specific atomic operations. When possible they are
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
32 * implemented as true processor specific atomic operations. When that
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
33 * is not possible the are implemented using locks that *do* use the
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
34 * available atomic operations.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
35 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
36 * At the very minimum spin locks must be implemented. Without spin
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
37 * locks it is not possible (AFAICT) to emulate the rest of the atomic
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
38 * operations.
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
39 */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
40
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
41 #ifndef _SDL_atomic_h_
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
42 #define _SDL_atomic_h_
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
43
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
44 #include "SDL_stdinc.h"
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
45 #include "SDL_platform.h"
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
46
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
47 #include "begin_code.h"
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
48
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
49 /* Set up for C function definitions, even when using C++ */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
50 #ifdef __cplusplus
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
51 /* *INDENT-OFF* */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
52 extern "C" {
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
53 /* *INDENT-ON* */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
54 #endif
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
55
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
56 /* Function prototypes */
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
57
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
58 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
59 * \name SDL AtomicLock
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
60 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
61 * The spin lock functions and type are required and can not be
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
62 * emulated because they are used in the emulation code.
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
63 */
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
64 /*@{*/
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
65
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
66 typedef volatile Uint32 SDL_SpinLock;
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
67
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
68 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
69 * \brief Lock a spin lock by setting it to a none zero value.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
70 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
71 * \param lock Points to the lock.
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
72 */
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
73 extern DECLSPEC void SDLCALL SDL_AtomicLock(SDL_SpinLock *lock);
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
74
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
75 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
76 * \brief Unlock a spin lock by setting it to 0. Always returns immediately
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
77 *
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
78 * \param lock Points to the lock.
3261
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
79 */
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
80 extern DECLSPEC void SDLCALL SDL_AtomicUnlock(SDL_SpinLock *lock);
72b542f34739 The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents: 3237
diff changeset
81
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
82 /*@}*//*SDL AtomicLock*/
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
83
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
84 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
85 * \name 32 bit atomic operations
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
86 */
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
87 /*@{*/
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
88
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
89 /**
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
90 * \brief Check to see if \c *ptr == 0 and set it to 1.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
91 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
92 * \return SDL_True if the value pointed to by \c ptr was zero and
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
93 * SDL_False if it was not zero
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
94 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
95 * \param ptr Points to the value to be tested and set.
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
96 */
3216
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
97 extern DECLSPEC SDL_bool SDLCALL SDL_AtomicTestThenSet32(volatile Uint32 * ptr);
3237
916f396fe65d Start of redesign, getting rid of 8 and 16 bit operations in .h and test files.
Bob Pendleton <bob@pendleton.com>
parents: 3216
diff changeset
98
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
99 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
100 * \brief Set the value pointed to by \c ptr to be zero.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
101 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
102 * \param ptr Address of the value to be set to zero
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
103 */
3216
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
104 extern DECLSPEC void SDLCALL SDL_AtomicClear32(volatile Uint32 * ptr);
3237
916f396fe65d Start of redesign, getting rid of 8 and 16 bit operations in .h and test files.
Bob Pendleton <bob@pendleton.com>
parents: 3216
diff changeset
105
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
106 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
107 * \brief Fetch the current value of \c *ptr and then increment that
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
108 * value in place.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
109 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
110 * \return The value before it was incremented.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
111 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
112 * \param ptr Address of the value to fetch and increment
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
113 */
3216
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
114 extern DECLSPEC Uint32 SDLCALL SDL_AtomicFetchThenIncrement32(volatile Uint32 * ptr);
3237
916f396fe65d Start of redesign, getting rid of 8 and 16 bit operations in .h and test files.
Bob Pendleton <bob@pendleton.com>
parents: 3216
diff changeset
115
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
116 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
117 * \brief Fetch \c *ptr and then decrement the value in place.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
118 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
119 * \return The value before it was decremented.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
120 *
4474
119023057881 Typo in documentation
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
121 * \param ptr Address of the value to fetch and decrement
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
122 */
3216
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
123 extern DECLSPEC Uint32 SDLCALL SDL_AtomicFetchThenDecrement32(volatile Uint32 * ptr);
3237
916f396fe65d Start of redesign, getting rid of 8 and 16 bit operations in .h and test files.
Bob Pendleton <bob@pendleton.com>
parents: 3216
diff changeset
124
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
125 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
126 * \brief Fetch the current value at \c ptr and then add \c value to \c *ptr.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
127 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
128 * \return \c *ptr before the addition took place.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
129 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
130 * \param ptr The address of data we are changing.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
131 * \param value The value to add to \c *ptr.
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
132 */
3216
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
133 extern DECLSPEC Uint32 SDLCALL SDL_AtomicFetchThenAdd32(volatile Uint32 * ptr, Uint32 value);
3237
916f396fe65d Start of redesign, getting rid of 8 and 16 bit operations in .h and test files.
Bob Pendleton <bob@pendleton.com>
parents: 3216
diff changeset
134
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
135 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
136 * \brief Fetch \c *ptr and then subtract \c value from it.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
137 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
138 * \return \c *ptr before the subtraction took place.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
139 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
140 * \param ptr The address of the data being changed.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
141 * \param value The value to subtract from \c *ptr.
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
142 */
3216
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
143 extern DECLSPEC Uint32 SDLCALL SDL_AtomicFetchThenSubtract32(volatile Uint32 * ptr, Uint32 value);
3237
916f396fe65d Start of redesign, getting rid of 8 and 16 bit operations in .h and test files.
Bob Pendleton <bob@pendleton.com>
parents: 3216
diff changeset
144
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
145 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
146 * \brief Add one to the data pointed to by \c ptr and return that value.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
147 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
148 * \return The incremented value.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
149 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
150 * \param ptr The address of the data to increment.
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
151 */
3216
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
152 extern DECLSPEC Uint32 SDLCALL SDL_AtomicIncrementThenFetch32(volatile Uint32 * ptr);
3237
916f396fe65d Start of redesign, getting rid of 8 and 16 bit operations in .h and test files.
Bob Pendleton <bob@pendleton.com>
parents: 3216
diff changeset
153
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
154 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
155 * \brief Subtract one from data pointed to by \c ptr and return the new value.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
156 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
157 * \return The decremented value.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
158 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
159 * \param ptr The address of the data to decrement.
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
160 */
3216
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
161 extern DECLSPEC Uint32 SDLCALL SDL_AtomicDecrementThenFetch32(volatile Uint32 * ptr);
3237
916f396fe65d Start of redesign, getting rid of 8 and 16 bit operations in .h and test files.
Bob Pendleton <bob@pendleton.com>
parents: 3216
diff changeset
162
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
163 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
164 * \brief Add \c value to the data pointed to by \c ptr and return result.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
165 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
166 * \return The sum of \c *ptr and \c value.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
167 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
168 * \param ptr The address of the data to be modified.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
169 * \param value The value to be added.
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
170 */
3216
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
171 extern DECLSPEC Uint32 SDLCALL SDL_AtomicAddThenFetch32(volatile Uint32 * ptr, Uint32 value);
3237
916f396fe65d Start of redesign, getting rid of 8 and 16 bit operations in .h and test files.
Bob Pendleton <bob@pendleton.com>
parents: 3216
diff changeset
172
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
173 /**
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
174 * \brief Subtract \c value from the data pointed to by \c ptr and return the result.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
175 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
176 * \return The difference between \c *ptr and \c value.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
177 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
178 * \param ptr The address of the data to be modified.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
179 * \param value The value to be subtracted.
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
180 */
3216
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
181 extern DECLSPEC Uint32 SDLCALL SDL_AtomicSubtractThenFetch32(volatile Uint32 * ptr, Uint32 value);
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
182
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
183 /*@}*//*32 bit atomic operations*/
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
184
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
185 /**
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
186 * \name 64 bit atomic operations
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
187 */
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
188 /*@{*/
3199
3e1bf2b8bd81 This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents: 3187
diff changeset
189 #ifdef SDL_HAS_64BIT_TYPE
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
190
3216
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
191 extern DECLSPEC SDL_bool SDLCALL SDL_AtomicTestThenSet64(volatile Uint64 * ptr);
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
192 extern DECLSPEC void SDLCALL SDL_AtomicClear64(volatile Uint64 * ptr);
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
193 extern DECLSPEC Uint64 SDLCALL SDL_AtomicFetchThenIncrement64(volatile Uint64 * ptr);
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
194 extern DECLSPEC Uint64 SDLCALL SDL_AtomicFetchThenDecrement64(volatile Uint64 * ptr);
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
195 extern DECLSPEC Uint64 SDLCALL SDL_AtomicFetchThenAdd64(volatile Uint64 * ptr, Uint64 value);
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
196 extern DECLSPEC Uint64 SDLCALL SDL_AtomicFetchThenSubtract64(volatile Uint64 * ptr, Uint64 value);
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
197 extern DECLSPEC Uint64 SDLCALL SDL_AtomicIncrementThenFetch64(volatile Uint64 * ptr);
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
198 extern DECLSPEC Uint64 SDLCALL SDL_AtomicDecrementThenFetch64(volatile Uint64 * ptr);
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
199 extern DECLSPEC Uint64 SDLCALL SDL_AtomicAddThenFetch64(volatile Uint64 * ptr, Uint64 value);
48a80f2a7ff2 volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents: 3202
diff changeset
200 extern DECLSPEC Uint64 SDLCALL SDL_AtomicSubtractThenFetch64(volatile Uint64 * ptr, Uint64 value);
3202
3aa519a5c676 I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents: 3199
diff changeset
201 #endif /* SDL_HAS_64BIT_TYPE */
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
202
3407
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
203 /*@}*//*64 bit atomic operations*/
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3261
diff changeset
204
3180
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
205 /* Ends C function definitions when using C++ */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
206 #ifdef __cplusplus
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
207 /* *INDENT-OFF* */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
208 }
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
209 /* *INDENT-ON* */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
210 #endif
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
211
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
212 #include "close_code.h"
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
213
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
214 #endif /* _SDL_atomic_h_ */
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
215
77d6336711fc First commit for SDL atomic operations.
Bob Pendleton <bob@pendleton.com>
parents:
diff changeset
216 /* vi: set ts=4 sw=4 expandtab: */