include/internal/rcu.h

   1 /*
   2  * Copyright 2023-2024 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #ifndef OPENSSL_RCU_H
  11 # define OPENSSL_RCU_H
  12 # pragma once
  13
  14 typedef void (*rcu_cb_fn)(void *data);
  15
  16 typedef struct rcu_lock_st CRYPTO_RCU_LOCK;
  17
  18 CRYPTO_RCU_LOCK *ossl_rcu_lock_new(int num_writers);
  19 void ossl_rcu_lock_free(CRYPTO_RCU_LOCK *lock);
  20 void ossl_rcu_read_lock(CRYPTO_RCU_LOCK *lock);
  21 void ossl_rcu_write_lock(CRYPTO_RCU_LOCK *lock);
  22 void ossl_rcu_write_unlock(CRYPTO_RCU_LOCK *lock);
  23 void ossl_rcu_read_unlock(CRYPTO_RCU_LOCK *lock);
  24 void ossl_synchronize_rcu(CRYPTO_RCU_LOCK *lock);
  25 int ossl_rcu_call(CRYPTO_RCU_LOCK *lock, rcu_cb_fn cb, void *data);
  26 void *ossl_rcu_uptr_deref(void **p);
  27 void ossl_rcu_assign_uptr(void **p, void **v);
  28 #define ossl_rcu_deref(p) ossl_rcu_uptr_deref((void **)p)
  29 #define ossl_rcu_assign_ptr(p,v) ossl_rcu_assign_uptr((void **)p, (void **)v)
  30
  31 #endif