/// <summary>
/// Creates an empty filter with the given parameters.
/// The <see cref="Parameters.NumberOfBits"/> specifies the final size of the filter.
/// </summary>
public BloomFilter(Parameters parameters)
{
Contract.Requires(parameters != null);
m_bits = new ConcurrentBitArray(parameters.NumberOfBits);
m_parameters = parameters;
}
/// <summary>
/// Modifies the current bit array to be the bit-wise intersect with the given bit array
/// </summary>
/// <param name="other">the bit array to intersect with</param>
/// <returns>the current modified bit array</returns>
public ConcurrentBitArray And(ConcurrentBitArray other)
{
Contract.Requires(other != null && other.Length == Length);
var array = m_array;
for (int i = 0; i < array.Length; i++)
{
bool updated = false;
int otherValue = Volatile.Read(ref other.m_array[i]);
while (!updated)
{
var oldValue = Volatile.Read(ref array[i]);
var newValue = oldValue & otherValue;
updated = Interlocked.CompareExchange(ref array[i], newValue, oldValue) == oldValue;
}
}
return(this);
}
