multithreading - Compatibility between atomic operations in different C libraries -

multithreading - Compatibility between atomic operations in different C libraries -

a classical synchronization idiom between 2 threads (producer , consumer) involves

a producer updating value in shared memory (global_variable), , updating atomic flag (flag) release semantics. in c11 producer code written follows:

global_variable = 0; atomic_store_explicit(&flag, 1, memory_order_release); // flag integer

a consumer waiting value of flag become 1, , reading global_variable. if consumer has been written using gcc atomic library like:

while (__atomic_load_n(&flag, __atomic_acquire) != 1; // loop until flag enabled // read value of global_variable

if consumer code written using explicit c11 atomic loads expect programme correct...but gcc "equivalent" code guaranteed work too? in other words, question becomes: atomic operations defined in different libraries compatible? gcc atomics documentation vague respect:

the next built-in functions approximately match requirements c++11 memory model

c multithreading gcc atomic c11