diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/atomic_wide_counter.h | 89 | ||||
| -rw-r--r-- | include/bits/atomic_wide_counter.h | 1 |
2 files changed, 90 insertions, 0 deletions
diff --git a/include/atomic_wide_counter.h b/include/atomic_wide_counter.h new file mode 100644 index 0000000000..31f009d5e6 --- /dev/null +++ b/include/atomic_wide_counter.h @@ -0,0 +1,89 @@ +/* Monotonically increasing wide counters (at least 62 bits). + Copyright (C) 2016-2021 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef _ATOMIC_WIDE_COUNTER_H +#define _ATOMIC_WIDE_COUNTER_H + +#include <atomic.h> +#include <bits/atomic_wide_counter.h> + +#if __HAVE_64B_ATOMICS + +static inline uint64_t +__atomic_wide_counter_load_relaxed (__atomic_wide_counter *c) +{ + return atomic_load_relaxed (&c->__value64); +} + +static inline uint64_t +__atomic_wide_counter_fetch_add_relaxed (__atomic_wide_counter *c, + unsigned int val) +{ + return atomic_fetch_add_relaxed (&c->__value64, val); +} + +static inline uint64_t +__atomic_wide_counter_fetch_add_acquire (__atomic_wide_counter *c, + unsigned int val) +{ + return atomic_fetch_add_acquire (&c->__value64, val); +} + +static inline void +__atomic_wide_counter_add_relaxed (__atomic_wide_counter *c, + unsigned int val) +{ + atomic_store_relaxed (&c->__value64, + atomic_load_relaxed (&c->__value64) + val); +} + +static uint64_t __attribute__ ((unused)) +__atomic_wide_counter_fetch_xor_release (__atomic_wide_counter *c, + unsigned int val) +{ + return atomic_fetch_xor_release (&c->__value64, val); +} + +#else /* !__HAVE_64B_ATOMICS */ + +uint64_t __atomic_wide_counter_load_relaxed (__atomic_wide_counter *c) + attribute_hidden; + +uint64_t __atomic_wide_counter_fetch_add_relaxed (__atomic_wide_counter *c, + unsigned int op) + attribute_hidden; + +static inline uint64_t +__atomic_wide_counter_fetch_add_acquire (__atomic_wide_counter *c, + unsigned int val) +{ + uint64_t r = __atomic_wide_counter_fetch_add_relaxed (c, val); + atomic_thread_fence_acquire (); + return r; +} + +static inline void +__atomic_wide_counter_add_relaxed (__atomic_wide_counter *c, + unsigned int val) +{ + __atomic_wide_counter_fetch_add_relaxed (c, val); +} + +#endif /* !__HAVE_64B_ATOMICS */ + +#endif /* _ATOMIC_WIDE_COUNTER_H */ diff --git a/include/bits/atomic_wide_counter.h b/include/bits/atomic_wide_counter.h new file mode 100644 index 0000000000..8fb09a5291 --- /dev/null +++ b/include/bits/atomic_wide_counter.h @@ -0,0 +1 @@ +#include_next <bits/atomic_wide_counter.h> |