rand.rs.html -- source
Description: Source to the Rust file `src\libstd\sys\windows\rand.rs`.
Keywords: rust, rustlang, rust-lang

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    use crate::io;
    use crate::mem;
    use crate::sys::c;

    #[cfg(not(target_vendor = "uwp"))]
    pub fn hashmap_random_keys() -> (u64, u64) {
        let mut v = (0, 0);
        let ret = unsafe {
            c::RtlGenRandom(&mut v as *mut _ as *mut u8,
                            mem::size_of_val(&v) as c::ULONG)
        };
        if ret == 0 {
            panic!("couldn't generate random bytes: {}",
                   io::Error::last_os_error());
        }
        v
    }

    #[cfg(target_vendor = "uwp")]
    pub fn hashmap_random_keys() -> (u64, u64) {
        use crate::ptr;

        let mut v = (0, 0);
        let ret = unsafe {
            c::BCryptGenRandom(ptr::null_mut(), &mut v as *mut _ as *mut u8,
                               mem::size_of_val(&v) as c::ULONG,
                               c::BCRYPT_USE_SYSTEM_PREFERRED_RNG)
        };
        if ret != 0 {
            panic!("couldn't generate random bytes: {}",
                   io::Error::last_os_error());
        }
        return v
    }