public EncryptionBuffersPool(bool registerLowMemory = true, bool registerCleanup = true)
{
_maxNumberOfAllocationsToKeepInGlobalStackPerSlot = PlatformDetails.Is32Bits == false
? 128
: 32;
var numberOfSlots = Bits.MostSignificantBit(MaxNumberOfPagesToCache * Constants.Storage.PageSize) + 1;
_items = new PerCoreContainer <NativeAllocation> [numberOfSlots];
_globalStacks = new CountingConcurrentStack <NativeAllocation> [numberOfSlots];
_lastPerCoreCleanups = new DateTime[numberOfSlots];
_lastGlobalStackRebuilds = new DateTime[numberOfSlots];
_numberOfAllocationsDisposedInGlobalStacks = new long[numberOfSlots];
var now = DateTime.UtcNow;
for (int i = 0; i < _items.Length; i++)
{
_items[i] = new PerCoreContainer <NativeAllocation>();
_globalStacks[i] = new CountingConcurrentStack <NativeAllocation>();
_lastPerCoreCleanups[i] = now;
_lastGlobalStackRebuilds[i] = now;
}
if (registerLowMemory)
{
LowMemoryNotification.Instance.RegisterLowMemoryHandler(this);
}
if (registerCleanup)
{
_cleanupTimer = new Timer(Cleanup, null, TimeSpan.FromMinutes(1), TimeSpan.FromMinutes(1));
}
}
static void ClearStack(CountingConcurrentStack <NativeAllocation> stack)
{
if (stack == null || stack.IsEmpty)
{
return;
}
while (stack.TryPop(out var allocation))
{
if (allocation.InUse.Raise())
{
allocation.Dispose();
}
}
}
static bool TryGetFromStack(CountingConcurrentStack<T> stack, out T context)
{
context = default;
if (stack == null || stack.IsEmpty)
return false;
while (stack.TryPop(out context))
{
if (context.InUse.Raise() == false)
continue;
context.Renew();
return true;
}
return false;
}