projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 3b5ebe85 | 1 | /* Atomic operations. Sparc version. |
| 2b778ceb | 2 | Copyright (C) 2019-2021 Free Software Foundation, Inc. |
| 3b5ebe85 AZ |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 16 | License along with the GNU C Library; if not, see | |
| 17 | <https://www.gnu.org/licenses/>. */ | |
| 18 | ||
| 19 | #ifndef _ATOMIC_MACHINE_H | |
| 20 | #define _ATOMIC_MACHINE_H 1 | |
| 21 | ||
| 22 | #include <stdint.h> | |
| 23 | ||
| 24 | typedef int8_t atomic8_t; | |
| 25 | typedef uint8_t uatomic8_t; | |
| 26 | typedef int_fast8_t atomic_fast8_t; | |
| 27 | typedef uint_fast8_t uatomic_fast8_t; | |
| 28 | ||
| 29 | typedef int16_t atomic16_t; | |
| 30 | typedef uint16_t uatomic16_t; | |
| 31 | typedef int_fast16_t atomic_fast16_t; | |
| 32 | typedef uint_fast16_t uatomic_fast16_t; | |
| 33 | ||
| 34 | typedef int32_t atomic32_t; | |
| 35 | typedef uint32_t uatomic32_t; | |
| 36 | typedef int_fast32_t atomic_fast32_t; | |
| 37 | typedef uint_fast32_t uatomic_fast32_t; | |
| 38 | ||
| 39 | typedef int64_t atomic64_t; | |
| 40 | typedef uint64_t uatomic64_t; | |
| 41 | typedef int_fast64_t atomic_fast64_t; | |
| 42 | typedef uint_fast64_t uatomic_fast64_t; | |
| 43 | ||
| 44 | typedef intptr_t atomicptr_t; | |
| 45 | typedef uintptr_t uatomicptr_t; | |
| 46 | typedef intmax_t atomic_max_t; | |
| 47 | typedef uintmax_t uatomic_max_t; | |
| 48 | ||
| 49 | #ifdef __arch64__ | |
| 50 | # define __HAVE_64B_ATOMICS 1 | |
| 51 | #else | |
| 52 | # define __HAVE_64B_ATOMICS 0 | |
| 53 | #endif | |
| 54 | #define USE_ATOMIC_COMPILER_BUILTINS 1 | |
| 55 | ||
| 56 | /* XXX Is this actually correct? */ | |
| 57 | #define ATOMIC_EXCHANGE_USES_CAS __HAVE_64B_ATOMICS | |
| 58 | ||
| 59 | /* Compare and exchange. | |
| 60 | For all "bool" routines, we return FALSE if exchange succesful. */ | |
| 61 | ||
| 62 | #define __arch_compare_and_exchange_val_int(mem, newval, oldval, model) \ | |
| 63 | ({ \ | |
| 64 | typeof (*mem) __oldval = (oldval); \ | |
| 65 | __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ | |
| 66 | model, __ATOMIC_RELAXED); \ | |
| 67 | __oldval; \ | |
| 68 | }) | |
| 69 | ||
| 70 | #define atomic_compare_and_exchange_val_acq(mem, new, old) \ | |
| 71 | ({ \ | |
| 72 | __typeof ((__typeof (*(mem))) *(mem)) __result; \ | |
| 73 | if (sizeof (*mem) == 4 \ | |
| 74 | || (__HAVE_64B_ATOMICS && sizeof (*mem) == 8)) \ | |
| 75 | __result = __arch_compare_and_exchange_val_int (mem, new, old, \ | |
| 76 | __ATOMIC_ACQUIRE); \ | |
| 77 | else \ | |
| 78 | abort (); \ | |
| 79 | __result; \ | |
| 80 | }) | |
| 81 | ||
| 82 | #ifdef __sparc_v9__ | |
| 83 | # define atomic_full_barrier() \ | |
| 84 | __asm __volatile ("membar #LoadLoad | #LoadStore" \ | |
| 85 | " | #StoreLoad | #StoreStore" : : : "memory") | |
| 86 | # define atomic_read_barrier() \ | |
| 87 | __asm __volatile ("membar #LoadLoad | #LoadStore" : : : "memory") | |
| 88 | # define atomic_write_barrier() \ | |
| 89 | __asm __volatile ("membar #LoadStore | #StoreStore" : : : "memory") | |
| 90 | ||
| 91 | extern void __cpu_relax (void); | |
| 92 | # define atomic_spin_nop() __cpu_relax () | |
| 93 | #endif | |
| 94 | ||
| 95 | #endif /* _ATOMIC_MACHINE_H */ |