Critical Section
/ˈkrɪt.ɪ.kəl ˈsɛk.ʃən/
noun — “the VIP lounge of your program where only one process can party at a time.”
Critical Section is a part of a program where shared resources, like memory or files, are accessed and modified. To prevent race conditions and data corruption, only one process or thread is allowed to execute in the Critical Section at any given time. Proper synchronization ensures consistent and predictable behavior in concurrent systems.
Semaphore
/ˈsɛm.ə.fɔːr/
noun — “the OS’s polite traffic cop for your processes.”
Semaphore is a synchronization primitive used by operating systems and concurrent programs to control access to shared resources and prevent conflicts like race conditions. It acts as a signaling mechanism, allowing processes or threads to coordinate their actions safely without stepping on each other’s toes.