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Move collecting handler to separate function.

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s/master/collector/g
This commit is contained in:
John Soo 2022-04-20 21:01:02 -07:00
parent a27faabd0a
commit b9a87464a0
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GPG key ID: D8A148F8CE4DDBC2
1 changed files with 91 additions and 91 deletions
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90
src/nix-eval-jobs.cc
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@ -182,7 +182,7 @@ static void worker(
auto vRoot = topLevelValue(state, autoArgs);
while (true) {
/* Wait for the master to send us a job name. */
/* Wait for the collector to send us a job name. */
writeLine(to.get(), "next");
auto s = readLine(from.get());
@ -192,7 +192,7 @@ static void worker(
debug("worker process %d at '%s'", getpid(), attrPath);
/* Evaluate it and send info back to the master. */
/* Evaluate it and send info back to the collector. */
nlohmann::json reply;
reply["attr"] = attrPath;
@ -287,7 +287,7 @@ static void worker(
writeLine(to.get(), reply.dump());
/* If our RSS exceeds the maximum, exit. The master will
/* If our RSS exceeds the maximum, exit. The collector will
start a new process. */
struct rusage r;
getrusage(RUSAGE_SELF, &r);
@ -341,40 +341,6 @@ struct Proc {
~Proc() { }
};
int main(int argc, char * * argv)
{
/* Prevent undeclared dependencies in the evaluation via
$NIX_PATH. */
unsetenv("NIX_PATH");
/* We are doing the garbage collection by killing forks */
setenv("GC_DONT_GC", "1", 1);
return handleExceptions(argv[0], [&]() {
initNix();
initGC();
myArgs.parseCmdline(argvToStrings(argc, argv));
/* FIXME: The build hook in conjunction with import-from-derivation is causing "unexpected EOF" during eval */
settings.builders = "";
/* Prevent access to paths outside of the Nix search path and
to the environment. */
evalSettings.restrictEval = false;
/* When building a flake, use pure evaluation (no access to
'getEnv', 'currentSystem' etc. */
evalSettings.pureEval = myArgs.evalMode == evalAuto ? myArgs.flake : myArgs.evalMode == evalPure;
if (myArgs.releaseExpr == "") throw UsageError("no expression specified");
if (myArgs.gcRootsDir == "") printMsg(lvlError, "warning: `--gc-roots-dir' not specified");
if (myArgs.showTrace) {
loggerSettings.showTrace.assign(true);
}
struct State
{
std::set<std::string> todo{""};
@ -382,13 +348,8 @@ int main(int argc, char * * argv)
std::exception_ptr exc;
};
std::condition_variable wakeup;
Sync<State> state_;
/* Start a handler thread per worker process. */
auto handler = [&]()
{
std::function<void()> collector(Sync<State> & state_, std::condition_variable & wakeup) {
return [&]() {
try {
std::optional<std::unique_ptr<Proc>> proc_;
@ -463,10 +424,49 @@ int main(int argc, char * * argv)
wakeup.notify_all();
}
};
}
int main(int argc, char * * argv)
{
/* Prevent undeclared dependencies in the evaluation via
$NIX_PATH. */
unsetenv("NIX_PATH");
/* We are doing the garbage collection by killing forks */
setenv("GC_DONT_GC", "1", 1);
return handleExceptions(argv[0], [&]() {
initNix();
initGC();
myArgs.parseCmdline(argvToStrings(argc, argv));
/* FIXME: The build hook in conjunction with import-from-derivation is causing "unexpected EOF" during eval */
settings.builders = "";
/* Prevent access to paths outside of the Nix search path and
to the environment. */
evalSettings.restrictEval = false;
/* When building a flake, use pure evaluation (no access to
'getEnv', 'currentSystem' etc. */
evalSettings.pureEval = myArgs.evalMode == evalAuto ? myArgs.flake : myArgs.evalMode == evalPure;
if (myArgs.releaseExpr == "") throw UsageError("no expression specified");
if (myArgs.gcRootsDir == "") printMsg(lvlError, "warning: `--gc-roots-dir' not specified");
if (myArgs.showTrace) {
loggerSettings.showTrace.assign(true);
}
Sync<State> state_;
/* Start a collector thread per worker process. */
std::vector<std::thread> threads;
std::condition_variable wakeup;
for (size_t i = 0; i < myArgs.nrWorkers; i++)
threads.emplace_back(std::thread(handler));
threads.emplace_back(std::thread(collector(state_, wakeup)));
for (auto & thread : threads)
thread.join();