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-rw-r--r--include/internal/refcount.h303
1 files changed, 0 insertions, 303 deletions
diff --git a/include/internal/refcount.h b/include/internal/refcount.h
deleted file mode 100644
index 8de230f343ac..000000000000
--- a/include/internal/refcount.h
+++ /dev/null
@@ -1,303 +0,0 @@
-/*
- * Copyright 2016-2024 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>
-# include <openssl/err.h>
-
-# if defined(OPENSSL_THREADS) && !defined(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
-
-# if defined(__has_feature)
-# if __has_feature(thread_sanitizer)
-# define OSSL_TSAN_BUILD
-# endif
-# endif
-
-typedef struct {
- _Atomic int val;
-} CRYPTO_REF_COUNT;
-
-static inline int CRYPTO_UP_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = atomic_fetch_add_explicit(&refcnt->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(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
-# ifdef OSSL_TSAN_BUILD
- /*
- * TSAN requires acq_rel as it indicates a false positive error when
- * the object that contains the refcount is freed otherwise.
- */
- *ret = atomic_fetch_sub_explicit(&refcnt->val, 1, memory_order_acq_rel) - 1;
-# else
- *ret = atomic_fetch_sub_explicit(&refcnt->val, 1, memory_order_release) - 1;
- if (*ret == 0)
- atomic_thread_fence(memory_order_acquire);
-# endif
- return 1;
-}
-
-static inline int CRYPTO_GET_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = atomic_load_explicit(&refcnt->val, memory_order_acquire);
- return 1;
-}
-
-# elif defined(__GNUC__) && defined(__ATOMIC_RELAXED) && __GCC_ATOMIC_INT_LOCK_FREE > 0
-
-# define HAVE_ATOMICS 1
-
-typedef struct {
- int val;
-} CRYPTO_REF_COUNT;
-
-static __inline__ int CRYPTO_UP_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = __atomic_fetch_add(&refcnt->val, 1, __ATOMIC_RELAXED) + 1;
- return 1;
-}
-
-static __inline__ int CRYPTO_DOWN_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = __atomic_fetch_sub(&refcnt->val, 1, __ATOMIC_RELEASE) - 1;
- if (*ret == 0)
- __atomic_thread_fence(__ATOMIC_ACQUIRE);
- return 1;
-}
-
-static __inline__ int CRYPTO_GET_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = __atomic_load_n(&refcnt->val, __ATOMIC_RELAXED);
- return 1;
-}
-
-# elif defined(__ICL) && defined(_WIN32)
-# define HAVE_ATOMICS 1
-
-typedef struct {
- volatile int val;
-} CRYPTO_REF_COUNT;
-
-static __inline int CRYPTO_UP_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = _InterlockedExchangeAdd((void *)&refcnt->val, 1) + 1;
- return 1;
-}
-
-static __inline int CRYPTO_DOWN_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = _InterlockedExchangeAdd((void *)&refcnt->val, -1) - 1;
- return 1;
-}
-
-static __inline int CRYPTO_GET_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = _InterlockedExchangeAdd((void *)&refcnt->val, 0);
- return 1;
-}
-
-# elif defined(_MSC_VER) && _MSC_VER>=1200
-
-# define HAVE_ATOMICS 1
-
-typedef struct {
- volatile int val;
-} 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(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = _InterlockedExchangeAdd_nf(&refcnt->val, 1) + 1;
- return 1;
-}
-
-static __inline int CRYPTO_DOWN_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = _InterlockedExchangeAdd(&refcnt->val, -1) - 1;
- return 1;
-}
-
-static __inline int CRYPTO_GET_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = _InterlockedExchangeAdd_acq((void *)&refcnt->val, 0);
- 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(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = _InterlockedExchangeAdd(&refcnt->val, 1) + 1;
- return 1;
-}
-
-static __inline int CRYPTO_DOWN_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = _InterlockedExchangeAdd(&refcnt->val, -1) - 1;
- return 1;
-}
-
-static __inline int CRYPTO_GET_REF(CRYPTO_REF_COUNT *refcnt, int *ret)
-{
- *ret = _InterlockedExchangeAdd(&refcnt->val, 0);
- 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 struct {
- int val;
-# ifdef OPENSSL_THREADS
- CRYPTO_RWLOCK *lock;
-# endif
-} CRYPTO_REF_COUNT;
-
-# ifdef OPENSSL_THREADS
-
-static ossl_unused ossl_inline int CRYPTO_UP_REF(CRYPTO_REF_COUNT *refcnt,
- int *ret)
-{
- return CRYPTO_atomic_add(&refcnt->val, 1, ret, refcnt->lock);
-}
-
-static ossl_unused ossl_inline int CRYPTO_DOWN_REF(CRYPTO_REF_COUNT *refcnt,
- int *ret)
-{
- return CRYPTO_atomic_add(&refcnt->val, -1, ret, refcnt->lock);
-}
-
-static ossl_unused ossl_inline int CRYPTO_GET_REF(CRYPTO_REF_COUNT *refcnt,
- int *ret)
-{
- return CRYPTO_atomic_load_int(&refcnt->val, ret, refcnt->lock);
-}
-
-# define CRYPTO_NEW_FREE_DEFINED 1
-static ossl_unused ossl_inline int CRYPTO_NEW_REF(CRYPTO_REF_COUNT *refcnt, int n)
-{
- refcnt->val = n;
- refcnt->lock = CRYPTO_THREAD_lock_new();
- if (refcnt->lock == NULL) {
- ERR_raise(ERR_LIB_CRYPTO, ERR_R_CRYPTO_LIB);
- return 0;
- }
- return 1;
-}
-
-static ossl_unused ossl_inline void CRYPTO_FREE_REF(CRYPTO_REF_COUNT *refcnt) \
-{
- if (refcnt != NULL)
- CRYPTO_THREAD_lock_free(refcnt->lock);
-}
-
-# else /* OPENSSL_THREADS */
-
-static ossl_unused ossl_inline int CRYPTO_UP_REF(CRYPTO_REF_COUNT *refcnt,
- int *ret)
-{
- refcnt->val++;
- *ret = refcnt->val;
- return 1;
-}
-
-static ossl_unused ossl_inline int CRYPTO_DOWN_REF(CRYPTO_REF_COUNT *refcnt,
- int *ret)
-{
- refcnt->val--;
- *ret = refcnt->val;
- return 1;
-}
-
-static ossl_unused ossl_inline int CRYPTO_GET_REF(CRYPTO_REF_COUNT *refcnt,
- int *ret)
-{
- *ret = refcnt->val;
- return 1;
-}
-
-# endif /* OPENSSL_THREADS */
-# endif
-
-# ifndef CRYPTO_NEW_FREE_DEFINED
-static ossl_unused ossl_inline int CRYPTO_NEW_REF(CRYPTO_REF_COUNT *refcnt, int n)
-{
- refcnt->val = n;
- return 1;
-}
-
-static ossl_unused ossl_inline void CRYPTO_FREE_REF(CRYPTO_REF_COUNT *refcnt) \
-{
-}
-# endif /* CRYPTO_NEW_FREE_DEFINED */
-#undef CRYPTO_NEW_FREE_DEFINED
-
-# 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, val, object) \
- REF_PRINT_EX(text, val, (void *)object)
-
-#endif
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