static void RunTest()
{
var trimSettings1 = new UniformUnmanagedMemoryPool.TrimSettings {
TrimPeriodMilliseconds = 6_000
};
var pool1 = new UniformUnmanagedMemoryPool(128, 256, trimSettings1);
Thread.Sleep(8_000); // Let some callbacks fire already
var trimSettings2 = new UniformUnmanagedMemoryPool.TrimSettings {
TrimPeriodMilliseconds = 3_000
};
var pool2 = new UniformUnmanagedMemoryPool(128, 256, trimSettings2);
pool1.Return(pool1.Rent(64));
pool2.Return(pool2.Rent(64));
Assert.Equal(128, UnmanagedMemoryHandle.TotalOutstandingHandles);
// This exercises pool weak reference list trimming:
LeakPoolInstance();
GC.Collect();
GC.WaitForPendingFinalizers();
Assert.Equal(128, UnmanagedMemoryHandle.TotalOutstandingHandles);
Thread.Sleep(15_000);
Assert.True(
UnmanagedMemoryHandle.TotalOutstandingHandles <= 64,
$"UnmanagedMemoryHandle.TotalOutstandingHandles={UnmanagedMemoryHandle.TotalOutstandingHandles} > 64");
GC.KeepAlive(pool1);
GC.KeepAlive(pool2);
}
public static bool TryAllocate(
UniformUnmanagedMemoryPool pool,
long totalLengthInElements,
int bufferAlignmentInElements,
AllocationOptions options,
out MemoryGroup <T> memoryGroup)
{
Guard.NotNull(pool, nameof(pool));
Guard.MustBeGreaterThanOrEqualTo(totalLengthInElements, 0, nameof(totalLengthInElements));
Guard.MustBeGreaterThanOrEqualTo(bufferAlignmentInElements, 0, nameof(bufferAlignmentInElements));
int blockCapacityInElements = pool.BufferLength / ElementSize;
if (bufferAlignmentInElements > blockCapacityInElements)
{
memoryGroup = null;
return(false);
}
if (totalLengthInElements == 0)
{
throw new InvalidMemoryOperationException("Allocating 0 length buffer from UniformByteArrayPool is disallowed");
}
int numberOfAlignedSegments = blockCapacityInElements / bufferAlignmentInElements;
int bufferLength = numberOfAlignedSegments * bufferAlignmentInElements;
if (totalLengthInElements > 0 && totalLengthInElements < bufferLength)
{
bufferLength = (int)totalLengthInElements;
}
int sizeOfLastBuffer = (int)(totalLengthInElements % bufferLength);
int bufferCount = (int)(totalLengthInElements / bufferLength);
if (sizeOfLastBuffer == 0)
{
sizeOfLastBuffer = bufferLength;
}
else
{
bufferCount++;
}
UnmanagedMemoryHandle[] arrays = pool.Rent(bufferCount);
if (arrays == null)
{
// Pool is full
memoryGroup = null;
return(false);
}
memoryGroup = new Owned(pool, arrays, bufferLength, totalLengthInElements, sizeOfLastBuffer, options);
return(true);
}
static void RunTest()
{
var trimSettings = new UniformUnmanagedMemoryPool.TrimSettings {
TrimPeriodMilliseconds = 5_000
};
var pool = new UniformUnmanagedMemoryPool(128, 256, trimSettings);
UnmanagedMemoryHandle[] a = pool.Rent(64);
UnmanagedMemoryHandle[] b = pool.Rent(64);
pool.Return(a);
Assert.Equal(128, UnmanagedMemoryHandle.TotalOutstandingHandles);
Thread.Sleep(15_000);
// We expect at least 2 Trim actions, first trim 32, then 16 arrays.
// 128 - 32 - 16 = 80
Assert.True(
UnmanagedMemoryHandle.TotalOutstandingHandles <= 80,
$"UnmanagedMemoryHandle.TotalOutstandingHandles={UnmanagedMemoryHandle.TotalOutstandingHandles} > 80");
pool.Return(b);
}