lockMemoryAll

pub fn lockMemoryAll(options: LockMemoryAllOptions) LockMemoryError!void {
    if (@TypeOf(posix.system.mlockall) == void) return error.UnsupportedOperation;
    var flags: posix.MCL = .{
        .CURRENT = options.current,
        .FUTURE = options.future,
    };
    if (options.on_fault) {
        assert(options.current or options.future);
        if (@hasField(posix.MCL, "ONFAULT")) {
            flags.ONFAULT = true;
        } else {
            return error.UnsupportedOperation;
        }
    }
    switch (posix.errno(posix.system.mlockall(flags))) {
        .SUCCESS => return,
        .INVAL => |err| return std.Io.Threaded.errnoBug(err),
        .PERM => return error.PermissionDenied,
        .NOMEM => return error.LockedMemoryLimitExceeded,
        .AGAIN => return error.SystemResources,
        else => |err| return posix.unexpectedErrno(err),
    }
}