2016-06-27 16:03:06 +03:00
|
|
|
module.exports.run = runThread;
|
|
|
|
module.exports.runParallel = runParallel;
|
|
|
|
|
2016-07-17 00:35:35 +03:00
|
|
|
var q = [];
|
|
|
|
var pending = [];
|
|
|
|
|
|
|
|
function finishq()
|
|
|
|
{
|
|
|
|
for (var i = 0; i < q.length; i++)
|
|
|
|
{
|
|
|
|
if (q[i]._done)
|
|
|
|
{
|
|
|
|
q.splice(i, 1);
|
|
|
|
i--;
|
|
|
|
}
|
|
|
|
}
|
2016-07-17 21:30:32 +03:00
|
|
|
while (pending.length > 0 && q.length < pending[0][2])
|
2016-07-17 00:35:35 +03:00
|
|
|
{
|
|
|
|
var t = pending.shift();
|
|
|
|
q.push(t[0]);
|
2016-07-17 21:30:32 +03:00
|
|
|
process.nextTick(t[1]);
|
2016-07-17 00:35:35 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
var tid = 0;
|
2016-06-27 16:03:06 +03:00
|
|
|
function runThread(main, arg, done)
|
|
|
|
{
|
|
|
|
var thread = function()
|
|
|
|
{
|
|
|
|
// pass parameters as yield result
|
|
|
|
var pass = Array.prototype.slice.call(arguments, 0);
|
2016-07-17 21:30:32 +03:00
|
|
|
var v;
|
2016-07-17 00:35:35 +03:00
|
|
|
try
|
|
|
|
{
|
2016-07-19 13:38:35 +03:00
|
|
|
v = thread.gens[0].next(pass);
|
2016-07-17 00:35:35 +03:00
|
|
|
}
|
|
|
|
catch (e)
|
|
|
|
{
|
2016-07-17 21:30:32 +03:00
|
|
|
v = { done: 1, error: e };
|
2016-07-17 00:35:35 +03:00
|
|
|
}
|
|
|
|
if (v.done)
|
2016-07-19 13:38:35 +03:00
|
|
|
{
|
|
|
|
// generator finished
|
|
|
|
thread.gens.shift();
|
|
|
|
if (thread.gens.length)
|
|
|
|
{
|
|
|
|
// return to previous generator
|
|
|
|
thread(v.value);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (typeof v.value == 'object' &&
|
|
|
|
v.value.constructor.constructor == thread.gens[0].constructor.constructor)
|
|
|
|
{
|
|
|
|
// another generator instance returned - add it to stack and call
|
|
|
|
thread.gens.unshift(v.value);
|
|
|
|
thread();
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (!thread.gens.length)
|
2016-07-17 00:35:35 +03:00
|
|
|
{
|
|
|
|
thread._done = true;
|
2016-07-17 21:30:32 +03:00
|
|
|
process.nextTick(finishq);
|
2016-07-17 00:35:35 +03:00
|
|
|
}
|
2016-07-17 21:30:32 +03:00
|
|
|
if (v.error)
|
|
|
|
throw v.error;
|
2016-07-19 13:38:35 +03:00
|
|
|
if (!thread.gens.length && done)
|
2016-06-27 16:03:06 +03:00
|
|
|
done(v.value);
|
|
|
|
};
|
2016-07-17 00:35:35 +03:00
|
|
|
thread.id = tid++;
|
2016-07-19 13:38:35 +03:00
|
|
|
thread.gens = [ main(thread, arg) ];
|
2016-07-17 00:35:35 +03:00
|
|
|
thread.throttle = function(count)
|
|
|
|
{
|
|
|
|
finishq();
|
|
|
|
if (q.length < count)
|
|
|
|
{
|
|
|
|
q.push(thread);
|
2016-07-17 21:30:32 +03:00
|
|
|
process.nextTick(thread.cb());
|
2016-07-17 00:35:35 +03:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2016-07-17 21:30:32 +03:00
|
|
|
pending.push([ thread, thread.cb(), count ]);
|
2016-07-17 00:35:35 +03:00
|
|
|
}
|
|
|
|
};
|
2016-07-17 21:30:32 +03:00
|
|
|
thread.cb = function()
|
|
|
|
{
|
|
|
|
var fn = function()
|
|
|
|
{
|
|
|
|
if (thread._current != fn)
|
|
|
|
{
|
|
|
|
throw new Error('Broken control flow! Callback'+
|
|
|
|
thread._current._stack.replace(/^\s*Error\s*at Function\.thread\.cb\s*\([^)]*\)/, '')+
|
|
|
|
'\nmust be called to resume thread, but this one is called instead:'+
|
|
|
|
fn._stack.replace(/^\s*Error\s*at Function\.thread\.cb\s*\([^)]*\)/, '')+'\n--'
|
|
|
|
);
|
|
|
|
}
|
|
|
|
return thread.apply(thread, arguments);
|
|
|
|
};
|
|
|
|
fn._stack = new Error().stack;
|
|
|
|
thread._current = fn;
|
|
|
|
return fn;
|
|
|
|
};
|
2016-06-27 16:03:06 +03:00
|
|
|
thread();
|
2016-07-19 13:38:35 +03:00
|
|
|
return thread;
|
2016-06-27 16:03:06 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
function runParallel(threads, done)
|
|
|
|
{
|
|
|
|
var results = [];
|
|
|
|
var resultCount = 0;
|
|
|
|
var allDone = function(i, result)
|
|
|
|
{
|
|
|
|
if (!results[i])
|
|
|
|
{
|
|
|
|
results[i] = result;
|
|
|
|
resultCount++;
|
|
|
|
if (resultCount == threads.length)
|
|
|
|
done(results);
|
|
|
|
}
|
|
|
|
};
|
|
|
|
threads.map((t, i) => runThread(t, null, function(result) { allDone(i, result); }));
|
|
|
|
}
|