linux - Are Win32 InterlockedIncrement and InterlockedExchange atomic across processes? -

linux - Are Win32 InterlockedIncrement and InterlockedExchange atomic across processes? -

msdn says interlocked functions provide simple mechanism synchronizing access variable shared multiple threads.

i not sure if work across threads of multiple processes if variable in shared memory of processes.

similarly gnu gcc compiler intrinsic: __sync_add_and_fetch , __sync_lock_test_and_set?

this question 2 questions 2 different answers.

for __sync_xxx builtins in gcc reply yes.

refer online doc this, described, these builtins issuing total barrier, preventing internal speculating loads within processor pipeline. every , multi-thread, multi-process, etc. shared memory safe them.

i know nil windows interlockedxxx functions. msdn knows, , says:

the threads of different processes can utilize mechanism if variable in shared memory

so both answers "yes".

linux windows gcc atomic atomic-swap