public NativeMemAllocationMediator(int nativeBlockAllocSize)
{
_NativeBlockAllocSize = nativeBlockAllocSize;
_FullCompleteBlocks = new List <native_mem_block_t>();
_ActiveBlock = AllocBlock(_NativeBlockAllocSize);
}
[M(O.AggressiveInlining)] public IntPtr Alloc(int size)
{
Debug.Assert(size <= _NativeBlockAllocSize);
if (_ActiveBlock.FreeSize() < size)
{
_FullCompleteBlocks.Add(_ActiveBlock);
_ActiveBlock = AllocBlock(_NativeBlockAllocSize);
}
var ptr = _ActiveBlock.Alloc(size);
return(ptr);
}
private void DisposeNativeResources()
{
if (_FullCompleteBlocks != null)
{
foreach (var t in _FullCompleteBlocks)
{
Marshal.FreeHGlobal(t.GetBaseAddr());
}
_FullCompleteBlocks = null;
}
if (_ActiveBlock.GetBaseAddr() != IntPtr.Zero)
{
Marshal.FreeHGlobal(_ActiveBlock.GetBaseAddr());
_ActiveBlock = default;
}
}
[M(O.AggressiveInlining)] public IntPtr AllocAndCopy(char *source, int sourceLength)
{
var copyLenInBytes = sourceLength * sizeof(char);
var allocSizeInBytes = copyLenInBytes + sizeof(char);
Debug.Assert(allocSizeInBytes <= _NativeBlockAllocSize);
if (_ActiveBlock.FreeSize() < allocSizeInBytes)
{
_FullCompleteBlocks.Add(_ActiveBlock);
_ActiveBlock = AllocBlock(_NativeBlockAllocSize);
}
var dest = _ActiveBlock.Alloc(allocSizeInBytes);
Buffer.MemoryCopy(source, (void *)dest, copyLenInBytes, copyLenInBytes);
((char *)dest)[sourceLength] = '\0';
return(dest);
}
