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document global variables

This commit is contained in:
Larry Ruane 2022-03-01 17:43:43 -07:00
parent c079a518c0
commit e170c3abd6
1 changed files with 8 additions and 2 deletions
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10
src/main.h
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@ -161,11 +161,17 @@ extern std::optional<uint64_t> last_block_num_txs;
extern std::optional<uint64_t> last_block_size;
extern const std::string strMessageMagic;
// These prevent lock-ordering problems in getblocktemplate() RPC
//! These four variables are used to notify getblocktemplate RPC of new tips.
//! When UpdateTip() establishes a new tip (best block), it must awaken a
//! waiting getblocktemplate RPC (if there is one) immediately. But upon waking
//! up, getblocktemplate cannot call chainActive->Tip() because it does not
//! (and cannot) hold cs_main. So the g_best_block_height and g_best_block variables
//! (protected by g_best_block_mutex) provide the needed height and block
//! hash respectively to getblocktemplate without it requiring cs_main.
extern CWaitableCriticalSection g_best_block_mutex;
extern CConditionVariable g_best_block_cv;
extern uint256 g_best_block;
extern int g_best_block_height;
extern uint256 g_best_block;
extern std::atomic_bool fImporting;
extern std::atomic_bool fReindex;