The buffer space one control message with a size-byte payload needs: the aligned header plus the aligned payload. Use
it for msg_controllen and for sizing the buffer. Fails an assertion for a negative size or one that does not fit.
assert(CMSG_SIZE(0) >= cast(u32) size_of(cmsghdr));
assert(CMSG_SIZE(size_of(s32)) >= CMSG_LEN(size_of(s32)));Doesn't run in the browser (only on linux, macos).
CMSG_SIZE :: (size: int) -> u32The buffer space one control message with a size-byte payload needs: the aligned header plus the aligned payload. Use
it for msg_controllen and for sizing the buffer. Fails an assertion for a negative size or one that does not fit.
Parameters
- size: int
Returns
- u32
assert(CMSG_SIZE(0) >= cast(u32) size_of(cmsghdr));
assert(CMSG_SIZE(size_of(s32)) >= CMSG_LEN(size_of(s32)));Doesn't run in the browser (only on linux, macos).