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Diffstat (limited to 'vdso/seqlock.h')
-rw-r--r-- | vdso/seqlock.h | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/vdso/seqlock.h b/vdso/seqlock.h deleted file mode 100644 index 7a173174b..000000000 --- a/vdso/seqlock.h +++ /dev/null @@ -1,39 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// Low level raw interfaces to the sequence counter used by the VDSO. -#ifndef VDSO_SEQLOCK_H_ -#define VDSO_SEQLOCK_H_ - -#include <stdint.h> - -#include "vdso/barrier.h" -#include "vdso/compiler.h" - -namespace vdso { - -inline int32_t read_seqcount_begin(const uint64_t* s) { - uint64_t seq = *s; - read_barrier(); - return seq & ~1; -} - -inline int read_seqcount_retry(const uint64_t* s, uint64_t seq) { - read_barrier(); - return unlikely(*s != seq); -} - -} // namespace vdso - -#endif // VDSO_SEQLOCK_H_ |