On Sun, 10 Feb 2019 at 21:37, <semi1@xxxxxxxxx> wrote: > > Hello, > i have a question regarding the function signature of some atomic > functions/builtins. > On https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html > compare_exchange has the signature: "bool __atomic_compare_exchange_n > (type *ptr, type *expected, type desired, bool weak, int > success_memorder, int failure_memorder)" This is the exact function signature. The name ends with "_n" not "_4". > On https://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary it has the signature > "bool __atomic_compare_exchange_N (IN *mem, IN *expected, IN desired, > int success, int failure)" That page is an old design document, describing the implementation plan, not the final status. Use the manual, not the wiki page. > When i try to use __atomic_compare_exchange_4 with 5 arguments i get > following error: too few arguments to function > ‘__atomic_compare_exchange_4’. > How can can i call the library function? Call one of the functions shown in the https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html page, using exactly the signature shown there. Do not call __atomic_compare_exchange_4. That isn't in the docs.
