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* execl() requires a terminating 0.

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* When a fast build wakes up a goal, try to start that goal in the
  same iteration of the startBuild() loop of run().  Otherwise no job
  might be started until the next job terminates.
This commit is contained in:
Eelco Dolstra 2004-05-14 12:24:29 +00:00
parent 4fc00cbec1
commit ace8872706
1 changed files with 21 additions and 10 deletions
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17
src/libstore/normalise.cc
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@ -213,6 +213,9 @@ private:
list of unfinished inputs. */ list of unfinished inputs. */
PathSet buildable; PathSet buildable;
/* Should be set whenever a goal is added to `buildable'. */
bool newBuildables;
/* Child processes currently running. */ /* Child processes currently running. */
Building building; Building building;
@ -327,8 +330,10 @@ bool Normaliser::addGoal(Path nePath)
/* Maintain the invariant that all goals with no unfinished inputs /* Maintain the invariant that all goals with no unfinished inputs
are in the `buildable' set. */ are in the `buildable' set. */
if (goal.unfinishedInputs.empty()) if (goal.unfinishedInputs.empty()) {
buildable.insert(nePath); buildable.insert(nePath);
newBuildables = true;
}
/* Add the goal to the goal graph. */ /* Add the goal to the goal graph. */
goals[nePath] = goal; goals[nePath] = goal;
@ -348,13 +353,18 @@ void Normaliser::run()
/* Start building as many buildable goals as possible. */ /* Start building as many buildable goals as possible. */
bool madeProgress = false; bool madeProgress = false;
do {
newBuildables = false;
for (PathSet::iterator i = buildable.begin(); for (PathSet::iterator i = buildable.begin();
i != buildable.end(); ++i) i != buildable.end(); ++i)
if (startBuild(*i)) { if (startBuild(*i)) {
madeProgress = true; madeProgress = true;
buildable.erase(*i); buildable.erase(*i);
} }
/* Continue while `newBuildables' is true. This happens
when startBuild() fast-builds a goal and wakes up
another goal. */
} while (newBuildables);
/* Wait until any child finishes (which may allow us to build /* Wait until any child finishes (which may allow us to build
new goals). */ new goals). */
@ -684,7 +694,7 @@ Normaliser::HookReply Normaliser::tryBuildHook(Goal & goal)
(canBuildMore() ? (string) "1" : "0").c_str(), (canBuildMore() ? (string) "1" : "0").c_str(),
thisSystem.c_str(), thisSystem.c_str(),
goal.expr.derivation.platform.c_str(), goal.expr.derivation.platform.c_str(),
goal.nePath.c_str()); goal.nePath.c_str(), 0);
throw SysError(format("executing `%1%'") % buildHook); throw SysError(format("executing `%1%'") % buildHook);
@ -1093,6 +1103,7 @@ void Normaliser::removeGoal(Goal & goal)
if (waiter.unfinishedInputs.empty()) { if (waiter.unfinishedInputs.empty()) {
debug(format("waking up goal `%1%'") % waiter.nePath); debug(format("waking up goal `%1%'") % waiter.nePath);
buildable.insert(waiter.nePath); buildable.insert(waiter.nePath);
newBuildables = true;
} }
} }