mirror of
https://git.rtems.org/rtems-libbsd/
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b3169c2a6a
Git mirror commit 59f44d20be3f99d181ca742e636d45fc39ec982b. This commit updates OpenSSL to version 1.1.1. This required an update of racoon which uses some internal stuff from OpenSSL and seems to be mostly unmaintained, e.g. there is update in the FreeBSD ports to cope with OpenSSL 1.1.1. Update #3472.
141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/*
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* Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#ifndef HEADER_INTERNAL_REFCOUNT_H
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# define HEADER_INTERNAL_REFCOUNT_H
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/* Used to checking reference counts, most while doing perl5 stuff :-) */
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# if defined(OPENSSL_NO_STDIO)
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# if defined(REF_PRINT)
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# error "REF_PRINT requires stdio"
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# endif
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# endif
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# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L \
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&& !defined(__STDC_NO_ATOMICS__)
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# include <stdatomic.h>
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# define HAVE_C11_ATOMICS
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# endif
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# if defined(HAVE_C11_ATOMICS) && defined(ATOMIC_INT_LOCK_FREE) \
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&& ATOMIC_INT_LOCK_FREE > 0
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# define HAVE_ATOMICS 1
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typedef _Atomic int CRYPTO_REF_COUNT;
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static inline int CRYPTO_UP_REF(_Atomic int *val, int *ret, void *lock)
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{
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*ret = atomic_fetch_add_explicit(val, 1, memory_order_relaxed) + 1;
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return 1;
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}
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/*
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* Changes to shared structure other than reference counter have to be
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* serialized. And any kind of serialization implies a release fence. This
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* means that by the time reference counter is decremented all other
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* changes are visible on all processors. Hence decrement itself can be
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* relaxed. In case it hits zero, object will be destructed. Since it's
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* last use of the object, destructor programmer might reason that access
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* to mutable members doesn't have to be serialized anymore, which would
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* otherwise imply an acquire fence. Hence conditional acquire fence...
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*/
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static inline int CRYPTO_DOWN_REF(_Atomic int *val, int *ret, void *lock)
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{
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*ret = atomic_fetch_sub_explicit(val, 1, memory_order_relaxed) - 1;
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if (*ret == 0)
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atomic_thread_fence(memory_order_acquire);
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return 1;
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}
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# elif defined(__GNUC__) && defined(__ATOMIC_RELAXED) && __GCC_ATOMIC_INT_LOCK_FREE > 0
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# define HAVE_ATOMICS 1
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typedef int CRYPTO_REF_COUNT;
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static __inline__ int CRYPTO_UP_REF(int *val, int *ret, void *lock)
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{
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*ret = __atomic_fetch_add(val, 1, __ATOMIC_RELAXED) + 1;
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return 1;
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}
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static __inline__ int CRYPTO_DOWN_REF(int *val, int *ret, void *lock)
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{
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*ret = __atomic_fetch_sub(val, 1, __ATOMIC_RELAXED) - 1;
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if (*ret == 0)
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__atomic_thread_fence(__ATOMIC_ACQUIRE);
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return 1;
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}
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# elif defined(_MSC_VER) && _MSC_VER>=1200
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# define HAVE_ATOMICS 1
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typedef volatile int CRYPTO_REF_COUNT;
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# if (defined(_M_ARM) && _M_ARM>=7) || defined(_M_ARM64)
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# include <intrin.h>
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# if defined(_M_ARM64) && !defined(_ARM_BARRIER_ISH)
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# define _ARM_BARRIER_ISH _ARM64_BARRIER_ISH
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# endif
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static __inline int CRYPTO_UP_REF(volatile int *val, int *ret, void *lock)
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{
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*ret = _InterlockedExchangeAdd_nf(val, 1) + 1;
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return 1;
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}
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static __inline int CRYPTO_DOWN_REF(volatile int *val, int *ret, void *lock)
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{
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*ret = _InterlockedExchangeAdd_nf(val, -1) - 1;
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if (*ret == 0)
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__dmb(_ARM_BARRIER_ISH);
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return 1;
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}
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# else
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# pragma intrinsic(_InterlockedExchangeAdd)
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static __inline int CRYPTO_UP_REF(volatile int *val, int *ret, void *lock)
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{
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*ret = _InterlockedExchangeAdd(val, 1) + 1;
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return 1;
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}
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static __inline int CRYPTO_DOWN_REF(volatile int *val, int *ret, void *lock)
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{
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*ret = _InterlockedExchangeAdd(val, -1) - 1;
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return 1;
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}
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# endif
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# else
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typedef int CRYPTO_REF_COUNT;
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# define CRYPTO_UP_REF(val, ret, lock) CRYPTO_atomic_add(val, 1, ret, lock)
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# define CRYPTO_DOWN_REF(val, ret, lock) CRYPTO_atomic_add(val, -1, ret, lock)
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# endif
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# if !defined(NDEBUG) && !defined(OPENSSL_NO_STDIO)
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# define REF_ASSERT_ISNT(test) \
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(void)((test) ? (OPENSSL_die("refcount error", __FILE__, __LINE__), 1) : 0)
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# else
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# define REF_ASSERT_ISNT(i)
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# endif
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# ifdef REF_PRINT
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# define REF_PRINT_COUNT(a, b) \
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fprintf(stderr, "%p:%4d:%s\n", b, b->references, a)
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# else
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# define REF_PRINT_COUNT(a, b)
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# endif
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#endif
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