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#include <iostream>
#include <chrono>
#include <cassert>
#include "job.h"
void Scheduler::workerEntry() {
while (true) {
Job *job = nullptr;
{
lock_guard commMutGuard(commMut);
if (jobs.size() > 0) {
job = jobs.front();
jobs.pop();
}
}
if (job) {
job->callback();
} else if (finishFlag) {
break;
} else {
this_thread::sleep_for(chrono::milliseconds(100));
}
}
}
Scheduler::Scheduler(int nthreads)
: nthreads(nthreads) {
assert(nthreads > 0);
workers.reserve(nthreads);
for (int i = 0; i < nthreads; i++) {
workers.emplace_back([this]() { workerEntry(); });
}
}
Scheduler::~Scheduler() {
finish();
}
void Scheduler::submit(const function<void()> &func) {
Job *job = new Job(func);
lock_guard commMutGuard(commMut);
jobs.push(job);
}
void Scheduler::finish() {
if (hasJoined) return;
{
lock_guard commMutGuard(commMut);
finishFlag = true;
}
for (int i = 0; i < nthreads; i++) {
workers[i].join();
}
hasJoined = true;
}
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