Is memcpy process-safe?

Question

Ive looked online and have not been able to satisfy myself with an answer.

Is memcpy threadsafe? (in Windows)

What I mean is if I write to an area of memory

Answer 1

Routines like memcpy() (or memmove()) are part of standard C library, are included through standard header and know nothing about any locking mechanics. Locking should be provided by some external way like inter-process mutexes, semaphores or things like this.