Function sys_bitarray_test_and_set_region 

pub unsafe extern "C" fn sys_bitarray_test_and_set_region(
    bitarray: *mut sys_bitarray,
    num_bits: usize,
    offset: usize,
    to_set: bool,
) -> i32

Test if all bits in a region are cleared/set and set/clear them in a single atomic operation

This checks if all the bits (@p num_bits) in region starting from @p offset are in required state. If even one bit is not, -EEXIST is returned. If the whole region is set/cleared it is set to opposite state. The check and set is performed as a single atomic operation.

@param bitarray Bitarray struct @param num_bits Number of bits to test and set @param offset Starting bit position to test and set @param to_set if true the region will be set if all bits are cleared if false the region will be cleard if all bits are set

@retval 0 Operation successful @retval -EINVAL Invalid argument (e.g. bit to set exceeds the number of bits in bit array, etc.) @retval -EEXIST at least one bit in the region is set/cleared, operation cancelled