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Make drv hash modulo memo table thread-safe

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Let's get one step closer to the daemon not needing to fork.
This commit is contained in:
John Ericson 2020-11-19 16:50:06 +00:00
parent 79aa7d9518
commit 2113ae2d85
3 changed files with 21 additions and 16 deletions
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7
src/libexpr/primops.cc
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@ -1132,9 +1132,10 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
However, we don't bother doing this for floating CA derivations because
their "hash modulo" is indeterminate until built. */
if (drv.type() != DerivationType::CAFloating)
drvHashes.insert_or_assign(drvPath,
hashDerivationModulo(*state.store, Derivation(drv), false));
if (drv.type() != DerivationType::CAFloating) {
auto h = hashDerivationModulo(*state.store, Derivation(drv), false);
drvHashes.lock()->insert_or_assign(drvPath, h);
}
state.mkAttrs(v, 1 + drv.outputs.size());
mkString(*state.allocAttr(v, state.sDrvPath), drvPathS, {"=" + drvPathS});