atomic « integer « C Data Type Q&A

1. equality test for atomic variables in C and gcc    stackoverflow.com

I have a dummy question about atomic variables using gcc. My machine supports __sync_add_and_fetch function; I use this call in thread A to set my_variable (int) . I want Thread B reading ...

2. g_atomic_int_get guarantees visibility into another thread?    stackoverflow.com

This is related to this question. rmmh's claim on that question was that on certain architectures, no special magic is needed to implement atomic get and set. Specifically, in this ...

3. Atomic Add with long int is not working    stackoverflow.com

As cuda programming guide suggests, I want to call AtomicAdd function:

unsigned long long int atomicAdd(unsigned long long int* address,
             ...

4. Atomic integers & memcpy()    cboard.cprogramming.com

The memcpy that comes with glibc is optimized. But it is by far not guaranteed to copy exactly one integer at a time at all times. It is also frequently inlined (as an intrinsic) by the compiler, so it is not even a call to the source of memcpy in the first place. If you want guarantees that the copy is ...