1  // Copyright (c) 2023-present The Bitcoin Core developers
 2  // Distributed under the MIT software license, see the accompanying
 3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 4  
 5  #ifndef BITCOIN_KERNEL_CS_MAIN_H
 6  #define BITCOIN_KERNEL_CS_MAIN_H
 7  
 8  #include <sync.h>
 9  
10  /**
11   * Mutex to guard access to validation specific variables, such as reading
12   * or changing the chainstate.
13   *
14   * This may also need to be locked when updating the transaction pool, e.g. on
15   * AcceptToMemoryPool. See CTxMemPool::cs comment for details.
16   *
17   * The transaction pool has a separate lock to allow reading from it and the
18   * chainstate at the same time.
19   */
20  extern RecursiveMutex cs_main;
21  
22  #endif // BITCOIN_KERNEL_CS_MAIN_H