/// <summary>
/// Constructs a new container with the specified initial capacity and type of memory allocation.
/// </summary>
/// <param name="numBits">Number of bits.</param>
/// <param name="allocator">A member of the
/// [Unity.Collections.Allocator](https://docs.unity3d.com/ScriptReference/Unity.Collections.Allocator.html) enumeration.</param>
/// <param name="options">Memory should be cleared on allocation or left uninitialized.</param>
public UnsafeBitArray(int numBits, Allocator allocator, NativeArrayOptions options = NativeArrayOptions.ClearMemory)
{
Allocator = allocator;
var sizeInBytes = Bitwise.AlignUp(numBits, 64) / 8;
Ptr = (ulong *)UnsafeUtility.Malloc(sizeInBytes, 16, allocator);
Length = sizeInBytes * 8;
if (options == NativeArrayOptions.ClearMemory)
{
UnsafeUtility.MemClear(Ptr, sizeInBytes);
}
}
/// <summary>
/// Constructs a new container with the specified initial capacity and type of memory allocation.
/// </summary>
/// <param name="numBits">Number of bits.</param>
/// <param name="allocator">A member of the
/// [Unity.Collections.Allocator](https://docs.unity3d.com/ScriptReference/Unity.Collections.Allocator.html) enumeration.</param>
/// <param name="options">Memory should be cleared on allocation or left uninitialized.</param>
/// <note>Allocated number of bits will be aligned-up to closest 64-bits. For example, passing 1 as numBits will create BitArray that's
/// 64-bit (8 bytes) long.</note>
public UnsafeBitArray(int numBits, Allocator allocator, NativeArrayOptions options = NativeArrayOptions.ClearMemory)
{
CheckAllocator(allocator);
Allocator = allocator;
var sizeInBytes = Bitwise.AlignUp(numBits, 64) / 8;
Ptr = (ulong *)Memory.Unmanaged.Allocate(sizeInBytes, 16, allocator);
Length = numBits;
if (options == NativeArrayOptions.ClearMemory)
{
UnsafeUtility.MemClear(Ptr, sizeInBytes);
}
}
/// <summary>
/// Constructs a new container with the specified initial capacity and type of memory allocation.
/// </summary>
/// <param name="numBits">Number of bits.</param>
/// <param name="allocator">A member of the
/// [Unity.Collections.Allocator](https://docs.unity3d.com/ScriptReference/Unity.Collections.Allocator.html) enumeration.</param>
/// <param name="options">Memory should be cleared on allocation or left uninitialized.</param>
public UnsafeBitArray(int numBits, Allocator allocator, NativeArrayOptions options = NativeArrayOptions.ClearMemory)
{
if (allocator <= Allocator.None)
{
throw new ArgumentException("Allocator must be Temp, TempJob or Persistent", nameof(allocator));
}
Allocator = allocator;
var sizeInBytes = Bitwise.AlignUp(numBits, 64) / 8;
Ptr = (ulong *)UnsafeUtility.Malloc(sizeInBytes, 16, allocator);
Length = sizeInBytes * 8;
if (options == NativeArrayOptions.ClearMemory)
{
UnsafeUtility.MemClear(Ptr, sizeInBytes);
}
}
/// <summary>
/// Clear all bits to 0.
/// </summary>
public void Clear()
{
var sizeInBytes = Bitwise.AlignUp(Length, 64) / 8;
UnsafeUtility.MemClear(Ptr, sizeInBytes);
}
