Concurrent
The coroutine
uses the go keyword followed by a function call, you can put the execution process of this function in another coroutine (newbies can be roughly understood as new processes)
go func () (
sleep ( 3); // wait for 3 seconds
print ("Inside!");
} ()
Print ("Outside")
multi-coroutine concurrent task
If you have a series of tasks, and the parameters of the task are placed an inner array, the array asyncMap method can help you perform these tasks concurrently
var Start = now ();
var RES = [. 1, 2,. 3,. 4] .asyncMap (E => {
SLEEP ( 3); // If calculating e * e is a behavior that takes 3 seconds
return e * e;
}, 4); // 4 concurrent
print (fmt.Sprintf ("Cost time% v, Result:% v ", now (). Sub (start), res));
* Substitute the .asyncMap of the above example with.map to test the situation without concurrency *
Concurrent Lock
Concurrent map
Refer to map, such as
// concurrent security map
m = new(sync.Map)
block of code
by the following method can guarantee global concurrent scenarios to count only the content coroutine execution code, count default. 1
synchronized (lock, [count]) {
// code content
}
where the lock parameter can be string type (recommended) or other serializable objects