projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 04277e02 | 1 | /* Copyright (C) 2003-2019 Free Software Foundation, Inc. |
| 9c986f87 AS |
2 | This file is part of the GNU C Library. |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Lesser General Public | |
| 6 | License as published by the Free Software Foundation; either | |
| 7 | version 2.1 of the License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Lesser General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Lesser General Public | |
| ab84e3ff | 15 | License along with the GNU C Library. If not, see |
| 5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
| 9c986f87 | 17 | |
| de071d19 JM |
18 | #ifndef _ATOMIC_MACHINE_H |
| 19 | #define _ATOMIC_MACHINE_H 1 | |
| 9c986f87 AS |
20 | |
| 21 | #include <stdint.h> | |
| 22 | ||
| 23 | /* Coldfire has no atomic compare-and-exchange operation, and the | |
| 24 | kernel provides no userspace atomicity operations. Here we just | |
| 25 | use generic non-atomic implementations instead. */ | |
| 26 | ||
| 27 | typedef int8_t atomic8_t; | |
| 28 | typedef uint8_t uatomic8_t; | |
| 29 | typedef int_fast8_t atomic_fast8_t; | |
| 30 | typedef uint_fast8_t uatomic_fast8_t; | |
| 31 | ||
| 32 | typedef int16_t atomic16_t; | |
| 33 | typedef uint16_t uatomic16_t; | |
| 34 | typedef int_fast16_t atomic_fast16_t; | |
| 35 | typedef uint_fast16_t uatomic_fast16_t; | |
| 36 | ||
| 37 | typedef int32_t atomic32_t; | |
| 38 | typedef uint32_t uatomic32_t; | |
| 39 | typedef int_fast32_t atomic_fast32_t; | |
| 40 | typedef uint_fast32_t uatomic_fast32_t; | |
| 41 | ||
| 42 | typedef int64_t atomic64_t; | |
| 43 | typedef uint64_t uatomic64_t; | |
| 44 | typedef int_fast64_t atomic_fast64_t; | |
| 45 | typedef uint_fast64_t uatomic_fast64_t; | |
| 46 | ||
| 47 | typedef intptr_t atomicptr_t; | |
| 48 | typedef uintptr_t uatomicptr_t; | |
| 49 | typedef intmax_t atomic_max_t; | |
| 50 | typedef uintmax_t uatomic_max_t; | |
| 51 | ||
| 1ea339b6 TR |
52 | /* If we have just non-atomic operations, we can as well make them wide. */ |
| 53 | #define __HAVE_64B_ATOMICS 1 | |
| 54 | #define USE_ATOMIC_COMPILER_BUILTINS 0 | |
| 55 | ||
| 12d2dd70 SL |
56 | /* XXX Is this actually correct? */ |
| 57 | #define ATOMIC_EXCHANGE_USES_CAS 1 | |
| 58 | ||
| 9c986f87 AS |
59 | /* The only basic operation needed is compare and exchange. */ |
| 60 | #define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ | |
| 61 | ({ __typeof (mem) __gmemp = (mem); \ | |
| 62 | __typeof (*mem) __gret = *__gmemp; \ | |
| 63 | __typeof (*mem) __gnewval = (newval); \ | |
| 64 | \ | |
| 65 | if (__gret == (oldval)) \ | |
| 66 | *__gmemp = __gnewval; \ | |
| 67 | __gret; }) | |
| 68 | ||
| 69 | #define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ | |
| 70 | ({ __typeof (mem) __gmemp = (mem); \ | |
| 71 | __typeof (*mem) __gnewval = (newval); \ | |
| 72 | \ | |
| 73 | *__gmemp == (oldval) ? (*__gmemp = __gnewval, 0) : 1; }) | |
| 74 | ||
| 75 | #endif |