Synchronous vs Asynchronous and Blocking vs Non-Blocking
ok, at this time i will write about synchronous vs synchronous and blocking vs non-Blocking. actually the term synchronous, synchronous, blocking, non-blocking is important for programmer, on many book or tutorial about programmer we will find the term synchronous, synchronous, blocking, non-blocking so often. ok lets deep dive about it:
Thread is a list / set of instructions, we can imagine a road is the list and a car is the instruction.
Synchronous
Characteristic of synchronous :
- Waiting until the process is completed
- The thread is blocked while occupied by a process / instruction, until the process is completed
we can re-use the thread A, after the instruction on thread A is completed.
Asynchronous
Characteristic of Asynchronous :
- Not waiting the process completed
- The process is assigned to another thread
main threadA will spawn child ThreadA, and assign an instruction to the child thread, and the main thread is also able to use callback function to know the instruction status on the child thread. On case main threadB, the main thread don’t care about the instruction status on the child thread.
Blocking
Characteristic of blocking :
- Only one thread can be proceed on the single point of time
- Another thread will be on waiting state
ThreadB is occupying the method by doing some locking mechanism, so that another threads need to wait until the locking is released.
Non Blocking :
Characteristic of blocking :
- Can serve many thread on the single point of time
The non blocking method can handle many thread at same time.
Synchronous Blocking
the thread1, thread2 and thread3 is synchronous, but the process is blocked by something whether blocking method, I/O blocking, etc
Synchronous non-blocking
Asynchronous Blocking
Asynchronous Non- Blocking
