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Merge #11039: Avoid second mapWallet lookup

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8f2f1e0 wallet: Avoid second mapWallet lookup (João Barbosa)

Pull request description:

  All calls to `mapWallet.count()` have the intent to detect if a `txid` exists and most are followed by a second lookup to retrieve the `CWalletTx`.

  This PR replaces all `mapWallet.count()` calls with `mapWallet.find()` to avoid the second lookup.

Tree-SHA512: 96b7de7f5520ebf789a1aec1949a4e9c74e13683869cee012f717e5be8e51097d068e2347a36e89097c9a89f1ed1a1529db71760dac9b572e36a3e9ac1155f29
This commit is contained in:
Wladimir J. van der Laan
2017-08-18 16:15:20 +02:00
parent 9e00a625b4 8f2f1e0458
commit fc51565cbd
4 changed files with 44 additions and 31 deletions
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9
src/wallet/feebumper.cpp
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@@ -76,12 +76,12 @@ CFeeBumper::CFeeBumper(const CWallet *pWallet, const uint256 txidIn, const CCoin
vErrors.clear();
bumpedTxid.SetNull();
AssertLockHeld(pWallet->cs_wallet);
if (!pWallet->mapWallet.count(txid)) {
auto it = pWallet->mapWallet.find(txid);
if (it == pWallet->mapWallet.end()) {
vErrors.push_back("Invalid or non-wallet transaction id");
currentResult = BumpFeeResult::INVALID_ADDRESS_OR_KEY;
return;
}
auto it = pWallet->mapWallet.find(txid);
const CWalletTx& wtx = it->second;
if (!preconditionChecks(pWallet, wtx)) {
@@ -241,12 +241,13 @@ bool CFeeBumper::commit(CWallet *pWallet)
if (!vErrors.empty() || currentResult != BumpFeeResult::OK) {
return false;
}
if (txid.IsNull() || !pWallet->mapWallet.count(txid)) {
auto it = txid.IsNull() ? pWallet->mapWallet.end() : pWallet->mapWallet.find(txid);
if (it == pWallet->mapWallet.end()) {
vErrors.push_back("Invalid or non-wallet transaction id");
currentResult = BumpFeeResult::MISC_ERROR;
return false;
}
CWalletTx& oldWtx = pWallet->mapWallet[txid];
CWalletTx& oldWtx = it->second;
// make sure the transaction still has no descendants and hasn't been mined in the meantime
if (!preconditionChecks(pWallet, oldWtx)) {