Does the data sent first in the network programming reach the destination first?

zzjjvv

One thread:
pthread_mutex_lock
Send data 1
Send data 2
pthread_mutex_unlock
Another thread:
pthread_mutex_lock
Send data 3
pthread_mutex_unlock

Will the client receive data 1 and receive data 3 and then receive data 2?

shjjzx

Of course it is possible.

enigma

UDP is possible. TCP is impossible

darkhanyi

UDP is possible, but the data sent three times will arrive separately.
TCP is not possible, but the data sent three times may arrive together. That is to say, you may receive the data sent three times in buf at a recv. This is called sticky packets and must be considered when programming.