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Add some more CRYPTO_atomic functions

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We add an implementation for CRYPTO_atomic_or() and CRYPTO_atomic_load()

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/13733)
This commit is contained in:
Matt Caswell 2020-12-22 17:43:07 +00:00 committed by Dmitry Belyavskiy
parent 30af356df4
commit d5e742de65
5 changed files with 86 additions and 4 deletions
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16
crypto/threads_none.c
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@ -133,6 +133,22 @@ int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
return 1;
}
int CRYPTO_atomic_or(uint64_t *val, uint64_t op, uint64_t *ret,
CRYPTO_RWLOCK *lock)
{
*val |= op;
*ret = *val;
return 1;
}
int CRYPTO_atomic_load(uint64_t *val, uint64_t *ret, CRYPTO_RWLOCK *lock)
{
*ret = *val;
return 1;
}
int openssl_init_fork_handlers(void)
{
return 0;

50
crypto/threads_pthread.c
View File

@ -185,7 +185,7 @@ int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
return 1;
}
# endif
if (!CRYPTO_THREAD_write_lock(lock))
if (lock == NULL || !CRYPTO_THREAD_write_lock(lock))
return 0;
*val += amount;
@ -197,6 +197,54 @@ int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
return 1;
}
int CRYPTO_atomic_or(uint64_t *val, uint64_t op, uint64_t *ret,
CRYPTO_RWLOCK *lock)
{
# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL)
if (__atomic_is_lock_free(sizeof(*val), val)) {
*ret = __atomic_or_fetch(val, op, __ATOMIC_ACQ_REL);
return 1;
}
# elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
/* This will work for all future Solaris versions. */
if (ret != NULL) {
*ret = atomic_or_64_nv(val, op);
return 1;
}
# endif
if (lock == NULL || !CRYPTO_THREAD_write_lock(lock))
return 0;
*val |= op;
*ret = *val;
if (!CRYPTO_THREAD_unlock(lock))
return 0;
return 1;
}
int CRYPTO_atomic_load(uint64_t *val, uint64_t *ret, CRYPTO_RWLOCK *lock)
{
# if defined(__GNUC__) && defined(__ATOMIC_ACQUIRE)
if (__atomic_is_lock_free(sizeof(*val), val)) {
__atomic_load(val, ret, __ATOMIC_ACQUIRE);
return 1;
}
# elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
/* This will work for all future Solaris versions. */
if (ret != NULL) {
*ret = atomic_or_64_nv(val, 0);
return 1;
}
# endif
if (lock == NULL || !CRYPTO_THREAD_read_lock(lock))
return 0;
*ret = *val;
if (!CRYPTO_THREAD_unlock(lock))
return 0;
return 1;
}
# ifndef FIPS_MODULE
# ifdef OPENSSL_SYS_UNIX

19
crypto/threads_win.c
View File

@ -66,9 +66,9 @@ void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
return;
}
# define ONCE_UNINITED 0
# define ONCE_ININIT 1
# define ONCE_DONE 2
# define ONCE_UNINITED 0
# define ONCE_ININIT 1
# define ONCE_DONE 2
/*
* We don't use InitOnceExecuteOnce because that isn't available in WinXP which
@ -159,6 +159,19 @@ int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
return 1;
}
int CRYPTO_atomic_or(uint64_t *val, uint64_t op, uint64_t *ret,
CRYPTO_RWLOCK *lock)
{
*ret = (uint64_t)InterlockedOr64((LONG64 volatile *)val, (LONG64)op) | op;
return 1;
}
int CRYPTO_atomic_load(uint64_t *val, uint64_t *ret, CRYPTO_RWLOCK *lock)
{
*ret = (uint64_t)InterlockedOr64((LONG64 volatile *)val, 0);
return 1;
}
int openssl_init_fork_handlers(void)
{
return 0;

3
include/openssl/crypto.h.in
View File

@ -86,6 +86,9 @@ int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock);
void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock);
int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock);
int CRYPTO_atomic_or(uint64_t *val, uint64_t op, uint64_t *ret,
CRYPTO_RWLOCK *lock);
int CRYPTO_atomic_load(uint64_t *val, uint64_t *ret, CRYPTO_RWLOCK *lock);
/* No longer needed, so this is a no-op */
#define OPENSSL_malloc_init() while(0) continue

2
util/libcrypto.num
View File

@ -5284,3 +5284,5 @@ PEM_write_bio_PrivateKey_ex ? 3_0_0 EXIST::FUNCTION:
PEM_write_PUBKEY_ex ? 3_0_0 EXIST::FUNCTION:STDIO
PEM_write_bio_PUBKEY_ex ? 3_0_0 EXIST::FUNCTION:
EVP_PKEY_get_group_name ? 3_0_0 EXIST::FUNCTION:
CRYPTO_atomic_or ? 3_0_0 EXIST::FUNCTION:
CRYPTO_atomic_load ? 3_0_0 EXIST::FUNCTION: