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52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
// Copyright (c) 2020-2021 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_WALLET_CONTEXT_H
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#define BITCOIN_WALLET_CONTEXT_H
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#include <sync.h>
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#include <functional>
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#include <list>
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#include <memory>
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#include <vector>
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class ArgsManager;
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namespace interfaces {
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class Chain;
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class Wallet;
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} // namespace interfaces
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namespace wallet {
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class CWallet;
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using LoadWalletFn = std::function<void(std::unique_ptr<interfaces::Wallet> wallet)>;
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//! WalletContext struct containing references to state shared between CWallet
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//! instances, like the reference to the chain interface, and the list of opened
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//! wallets.
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//!
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//! Future shared state can be added here as an alternative to adding global
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//! variables.
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//!
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//! The struct isn't intended to have any member functions. It should just be a
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//! collection of state pointers that doesn't pull in dependencies or implement
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//! behavior.
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struct WalletContext {
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interfaces::Chain* chain{nullptr};
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ArgsManager* args{nullptr}; // Currently a raw pointer because the memory is not managed by this struct
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// It is unsafe to lock this after locking a CWallet::cs_wallet mutex because
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// this could introduce inconsistent lock ordering and cause deadlocks.
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Mutex wallets_mutex;
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std::vector<std::shared_ptr<CWallet>> wallets GUARDED_BY(wallets_mutex);
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std::list<LoadWalletFn> wallet_load_fns GUARDED_BY(wallets_mutex);
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//! Declare default constructor and destructor that are not inline, so code
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//! instantiating the WalletContext struct doesn't need to #include class
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//! definitions for smart pointer and container members.
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WalletContext();
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~WalletContext();
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};
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} // namespace wallet
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#endif // BITCOIN_WALLET_CONTEXT_H
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