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Diffstat (limited to 'NorthstarDLL/include/internal/refcount.h')
| -rw-r--r-- | NorthstarDLL/include/internal/refcount.h | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/NorthstarDLL/include/internal/refcount.h b/NorthstarDLL/include/internal/refcount.h deleted file mode 100644 index 7412d62f..00000000 --- a/NorthstarDLL/include/internal/refcount.h +++ /dev/null @@ -1,178 +0,0 @@ -/* - * Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved. - * - * Licensed under the Apache License 2.0 (the "License"). You may not use - * this file except in compliance with the License. You can obtain a copy - * in the file LICENSE in the source distribution or at - * https://www.openssl.org/source/license.html - */ -#ifndef OSSL_INTERNAL_REFCOUNT_H -# define OSSL_INTERNAL_REFCOUNT_H -# pragma once - -# include <openssl/e_os2.h> -# include <openssl/trace.h> - -# ifndef OPENSSL_DEV_NO_ATOMICS -# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L \ - && !defined(__STDC_NO_ATOMICS__) -# include <stdatomic.h> -# define HAVE_C11_ATOMICS -# endif - -# if defined(HAVE_C11_ATOMICS) && defined(ATOMIC_INT_LOCK_FREE) \ - && ATOMIC_INT_LOCK_FREE > 0 - -# define HAVE_ATOMICS 1 - -typedef _Atomic int CRYPTO_REF_COUNT; - -static inline int CRYPTO_UP_REF(_Atomic int *val, int *ret, - ossl_unused void *lock) -{ - *ret = atomic_fetch_add_explicit(val, 1, memory_order_relaxed) + 1; - return 1; -} - -/* - * Changes to shared structure other than reference counter have to be - * serialized. And any kind of serialization implies a release fence. This - * means that by the time reference counter is decremented all other - * changes are visible on all processors. Hence decrement itself can be - * relaxed. In case it hits zero, object will be destructed. Since it's - * last use of the object, destructor programmer might reason that access - * to mutable members doesn't have to be serialized anymore, which would - * otherwise imply an acquire fence. Hence conditional acquire fence... - */ -static inline int CRYPTO_DOWN_REF(_Atomic int *val, int *ret, - ossl_unused void *lock) -{ - *ret = atomic_fetch_sub_explicit(val, 1, memory_order_relaxed) - 1; - if (*ret == 0) - atomic_thread_fence(memory_order_acquire); - return 1; -} - -# elif defined(__GNUC__) && defined(__ATOMIC_RELAXED) && __GCC_ATOMIC_INT_LOCK_FREE > 0 - -# define HAVE_ATOMICS 1 - -typedef int CRYPTO_REF_COUNT; - -static __inline__ int CRYPTO_UP_REF(int *val, int *ret, ossl_unused void *lock) -{ - *ret = __atomic_fetch_add(val, 1, __ATOMIC_RELAXED) + 1; - return 1; -} - -static __inline__ int CRYPTO_DOWN_REF(int *val, int *ret, - ossl_unused void *lock) -{ - *ret = __atomic_fetch_sub(val, 1, __ATOMIC_RELAXED) - 1; - if (*ret == 0) - __atomic_thread_fence(__ATOMIC_ACQUIRE); - return 1; -} -# elif defined(__ICL) && defined(_WIN32) -# define HAVE_ATOMICS 1 -typedef volatile int CRYPTO_REF_COUNT; - -static __inline int CRYPTO_UP_REF(volatile int *val, int *ret, - ossl_unused void *lock) -{ - *ret = _InterlockedExchangeAdd((void *)val, 1) + 1; - return 1; -} - -static __inline int CRYPTO_DOWN_REF(volatile int *val, int *ret, - ossl_unused void *lock) -{ - *ret = _InterlockedExchangeAdd((void *)val, -1) - 1; - return 1; -} - -# elif defined(_MSC_VER) && _MSC_VER>=1200 - -# define HAVE_ATOMICS 1 - -typedef volatile int CRYPTO_REF_COUNT; - -# if (defined(_M_ARM) && _M_ARM>=7 && !defined(_WIN32_WCE)) || defined(_M_ARM64) -# include <intrin.h> -# if defined(_M_ARM64) && !defined(_ARM_BARRIER_ISH) -# define _ARM_BARRIER_ISH _ARM64_BARRIER_ISH -# endif - -static __inline int CRYPTO_UP_REF(volatile int *val, int *ret, - ossl_unused void *lock) -{ - *ret = _InterlockedExchangeAdd_nf(val, 1) + 1; - return 1; -} - -static __inline int CRYPTO_DOWN_REF(volatile int *val, int *ret, - ossl_unused void *lock) -{ - *ret = _InterlockedExchangeAdd_nf(val, -1) - 1; - if (*ret == 0) - __dmb(_ARM_BARRIER_ISH); - return 1; -} -# else -# if !defined(_WIN32_WCE) -# pragma intrinsic(_InterlockedExchangeAdd) -# else -# if _WIN32_WCE >= 0x600 - extern long __cdecl _InterlockedExchangeAdd(long volatile*, long); -# else - /* under Windows CE we still have old-style Interlocked* functions */ - extern long __cdecl InterlockedExchangeAdd(long volatile*, long); -# define _InterlockedExchangeAdd InterlockedExchangeAdd -# endif -# endif - -static __inline int CRYPTO_UP_REF(volatile int *val, int *ret, - ossl_unused void *lock) -{ - *ret = _InterlockedExchangeAdd(val, 1) + 1; - return 1; -} - -static __inline int CRYPTO_DOWN_REF(volatile int *val, int *ret, - ossl_unused void *lock) -{ - *ret = _InterlockedExchangeAdd(val, -1) - 1; - return 1; -} -# endif - -# endif -# endif /* !OPENSSL_DEV_NO_ATOMICS */ - -/* - * All the refcounting implementations above define HAVE_ATOMICS, so if it's - * still undefined here (such as when OPENSSL_DEV_NO_ATOMICS is defined), it - * means we need to implement a fallback. This fallback uses locks. - */ -# ifndef HAVE_ATOMICS - -typedef int CRYPTO_REF_COUNT; - -# define CRYPTO_UP_REF(val, ret, lock) CRYPTO_atomic_add(val, 1, ret, lock) -# define CRYPTO_DOWN_REF(val, ret, lock) CRYPTO_atomic_add(val, -1, ret, lock) - -# endif - -# if !defined(NDEBUG) && !defined(OPENSSL_NO_STDIO) -# define REF_ASSERT_ISNT(test) \ - (void)((test) ? (OPENSSL_die("refcount error", __FILE__, __LINE__), 1) : 0) -# else -# define REF_ASSERT_ISNT(i) -# endif - -# define REF_PRINT_EX(text, count, object) \ - OSSL_TRACE3(REF_COUNT, "%p:%4d:%s\n", (object), (count), (text)); -# define REF_PRINT_COUNT(text, object) \ - REF_PRINT_EX(text, object->references, (void *)object) - -#endif |