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Properly type the derivation and substitution goal maps

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As a bonus, Worker::removeGoal is less inefficient.
This commit is contained in:
John Ericson 2020-10-11 17:07:14 +00:00
parent 8cc510fb79
commit 5c74a6147b
2 changed files with 22 additions and 22 deletions
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11
src/libstore/build.hh
View file

@ -28,7 +28,6 @@ struct HookInstance;
/* A pointer to a goal. */
struct Goal;
class DerivationGoal;
typedef std::shared_ptr<Goal> GoalPtr;
typedef std::weak_ptr<Goal> WeakGoalPtr;
@ -140,6 +139,8 @@ struct Child
steady_time_point timeStarted;
};
class DerivationGoal;
class SubstitutionGoal;
/* The worker class. */
class Worker
@ -167,8 +168,8 @@ private:
/* Maps used to prevent multiple instantiations of a goal for the
same derivation / path. */
WeakGoalMap derivationGoals;
WeakGoalMap substitutionGoals;
std::map<StorePath, std::weak_ptr<DerivationGoal>> derivationGoals;
std::map<StorePath, std::weak_ptr<SubstitutionGoal>> substitutionGoals;
/* Goals waiting for busy paths to be unlocked. */
WeakGoals waitingForAnyGoal;
@ -242,7 +243,7 @@ public:
const StringSet & wantedOutputs, BuildMode buildMode = bmNormal);
/* substitution goal */
GoalPtr makeSubstitutionGoal(const StorePath & storePath, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
std::shared_ptr<SubstitutionGoal> makeSubstitutionGoal(const StorePath & storePath, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
/* Remove a dead goal. */
void removeGoal(GoalPtr goal);
@ -305,8 +306,6 @@ public:
typedef enum {rpAccept, rpDecline, rpPostpone} HookReply;
class SubstitutionGoal;
/* Unless we are repairing, we don't both to test validity and just assume it,
so the choices are `Absent` or `Valid`. */
enum struct PathStatus {

33
src/libstore/build/worker.cc
View file

@ -39,16 +39,13 @@ std::shared_ptr<DerivationGoal> Worker::makeDerivationGoalCommon(
const StringSet & wantedOutputs,
std::function<std::shared_ptr<DerivationGoal>()> mkDrvGoal)
{
WeakGoalPtr & abstract_goal_weak = derivationGoals[drvPath];
GoalPtr abstract_goal = abstract_goal_weak.lock(); // FIXME
std::shared_ptr<DerivationGoal> goal;
if (!abstract_goal) {
std::weak_ptr<DerivationGoal> & goal_weak = derivationGoals[drvPath];
std::shared_ptr<DerivationGoal> goal = goal_weak.lock();
if (!goal) {
goal = mkDrvGoal();
abstract_goal_weak = goal;
goal_weak = goal;
wakeUp(goal);
} else {
goal = std::dynamic_pointer_cast<DerivationGoal>(abstract_goal);
assert(goal);
goal->addWantedOutputs(wantedOutputs);
}
return goal;
@ -73,10 +70,10 @@ std::shared_ptr<DerivationGoal> Worker::makeBasicDerivationGoal(const StorePath
}
GoalPtr Worker::makeSubstitutionGoal(const StorePath & path, RepairFlag repair, std::optional<ContentAddress> ca)
std::shared_ptr<SubstitutionGoal> Worker::makeSubstitutionGoal(const StorePath & path, RepairFlag repair, std::optional<ContentAddress> ca)
{
WeakGoalPtr & goal_weak = substitutionGoals[path];
GoalPtr goal = goal_weak.lock(); // FIXME
std::weak_ptr<SubstitutionGoal> & goal_weak = substitutionGoals[path];
auto goal = goal_weak.lock(); // FIXME
if (!goal) {
goal = std::make_shared<SubstitutionGoal>(path, *this, repair, ca);
goal_weak = goal;
@ -85,14 +82,14 @@ GoalPtr Worker::makeSubstitutionGoal(const StorePath & path, RepairFlag repair,
return goal;
}
static void removeGoal(GoalPtr goal, WeakGoalMap & goalMap)
template<typename G>
static void removeGoal(std::shared_ptr<G> goal, std::map<StorePath, std::weak_ptr<G>> & goalMap)
{
/* !!! inefficient */
for (WeakGoalMap::iterator i = goalMap.begin();
for (typename std::map<StorePath, std::weak_ptr<G>>::iterator i = goalMap.begin();
i != goalMap.end(); )
if (i->second.lock() == goal) {
WeakGoalMap::iterator j = i; ++j;
typename std::map<StorePath, std::weak_ptr<G>>::iterator j = i; ++j;
goalMap.erase(i);
i = j;
}
@ -102,8 +99,12 @@ static void removeGoal(GoalPtr goal, WeakGoalMap & goalMap)
void Worker::removeGoal(GoalPtr goal)
{
nix::removeGoal(goal, derivationGoals);
nix::removeGoal(goal, substitutionGoals);
if (auto drvGoal = std::dynamic_pointer_cast<DerivationGoal>(goal))
nix::removeGoal(drvGoal, derivationGoals);
else if (auto subGoal = std::dynamic_pointer_cast<SubstitutionGoal>(goal))
nix::removeGoal(subGoal, substitutionGoals);
else
assert(false);
if (topGoals.find(goal) != topGoals.end()) {
topGoals.erase(goal);
/* If a top-level goal failed, then kill all other goals