public void AlignedAllocOverflowByteCountTest()
{
// POSIX requires byteCount to be a multiple of alignment and so we will internally upsize.
// This upsizing can overflow for certain values since we do (byteCount + (alignment - 1)) & ~(alignment - 1)
//
// However, this overflow is "harmless" since it will result in a value that is less than alignment
// given that alignment is a power of two and will ultimately be a value less than alignment which
// will be treated as invalid and result in OOM.
//
// Take for example a 64-bit system where the max power of two is (1UL << 63): 9223372036854775808
// * 9223372036854775808 + 9223372036854775807 == ulong.MaxValue, so no overflow
// * 9223372036854775809 + 9223372036854775807 == 0, so overflows and is less than alignment
// * ulong.MaxValue + 9223372036854775807 == 9223372036854775806, so overflows and is less than alignment
//
// Likewise, for small alignments such as 8 (which is the smallest on a 64-bit system for POSIX):
// * 18446744073709551608 + 7 == ulong.MaxValue, so no overflow
// * 18446744073709551609 + 7 == 0, so overflows and is less than alignment
// * ulong.MaxValue + 7 == 6, so overflows and is less than alignment
nuint maxAlignment = (nuint)1 << ((sizeof(nuint) * 8) - 1);
Assert.Throws <OutOfMemoryException>(() => NativeMemory.AlignedAlloc(maxAlignment + 1, maxAlignment));
Assert.Throws <OutOfMemoryException>(() => NativeMemory.AlignedAlloc(nuint.MaxValue, (uint)sizeof(nuint)));
}
public void AlignedAllocLessThanVoidPtrAlignmentTest()
{
void *ptr = NativeMemory.AlignedAlloc(1, 1);
Assert.True(ptr != null);
NativeMemory.AlignedFree(ptr);
}
public void AlignedAllocZeroSizeTest()
{
void *ptr = NativeMemory.AlignedAlloc(0, (uint)sizeof(nuint));
Assert.True(ptr != null);
Assert.True((nuint)ptr % (uint)sizeof(nuint) == 0);
NativeMemory.AlignedFree(ptr);
}
public void AlignedAllocTest(uint alignment)
{
void *ptr = NativeMemory.AlignedAlloc(1, alignment);
Assert.True(ptr != null);
Assert.True((nuint)ptr % alignment == 0);
NativeMemory.AlignedFree(ptr);
}
public void AlignedReallocZeroAlignmentTest()
{
void *ptr = NativeMemory.AlignedAlloc(1, (uint)sizeof(nuint));
Assert.True(ptr != null);
Assert.True((nuint)ptr % (uint)sizeof(nuint) == 0);
Assert.Throws <ArgumentException>(() => NativeMemory.AlignedRealloc(ptr, (uint)sizeof(nuint), 0));
NativeMemory.AlignedFree(ptr);
}
public void ZeroMemoryWithSizeEqualTo0ShouldNoOpTest(int offset)
{
byte *ptr = (byte *)NativeMemory.AlignedAlloc(512, 8);
Assert.True(ptr != null);
Assert.True((nuint)ptr % 8 == 0);
new Span <byte>(ptr, 512).Fill(0b10101010);
NativeMemory.ZeroMemory(ptr + offset, 0);
Assert.Equal(-1, new Span <byte>(ptr, 512).IndexOfAnyExcept((byte)0b10101010));
NativeMemory.AlignedFree(ptr);
}
public void ZeroMemoryTest(int size, int offset)
{
byte *ptr = (byte *)NativeMemory.AlignedAlloc((nuint)(size + offset), 8);
Assert.True(ptr != null);
Assert.True((nuint)ptr % 8 == 0);
new Span <byte>(ptr, size + offset).Fill(0b10101010);
NativeMemory.ZeroMemory(ptr + offset, (nuint)size);
Assert.Equal(-1, new Span <byte>(ptr + offset, size).IndexOfAnyExcept((byte)0));
NativeMemory.AlignedFree(ptr);
}
public void AlignedReallocSmallerToLargerTest()
{
void *ptr = NativeMemory.AlignedAlloc(16, 16);
Assert.True(ptr != null);
Assert.True((nuint)ptr % 16 == 0);
for (int i = 0; i < 16; i++)
{
((byte *)ptr)[i] = (byte)i;
}
void *newPtr = NativeMemory.AlignedRealloc(ptr, 32, 16);
Assert.True(newPtr != null);
Assert.True((nuint)newPtr % 16 == 0);
for (int i = 0; i < 16; i++)
{
Assert.True(((byte *)newPtr)[i] == i);
}
NativeMemory.AlignedFree(newPtr);
}
public void ZeroMemoryWithExactRangeTest(int size, int offset)
{
int headLength = offset;
int bodyLength = size;
int tailLength = 512 - headLength - bodyLength;
int headOffset = 0;
int bodyOffset = headLength;
int tailOffset = headLength + bodyLength;
byte *ptr = (byte *)NativeMemory.AlignedAlloc(512, 8);
Assert.True(ptr != null);
Assert.True((nuint)ptr % 8 == 0);
new Span <byte>(ptr, 512).Fill(0b10101010);
NativeMemory.ZeroMemory(ptr + bodyOffset, (nuint)bodyLength);
Assert.Equal(-1, new Span <byte>(ptr + headOffset, headLength).IndexOfAnyExcept((byte)0b10101010));
Assert.Equal(-1, new Span <byte>(ptr + bodyOffset, bodyLength).IndexOfAnyExcept((byte)0));
Assert.Equal(-1, new Span <byte>(ptr + tailOffset, tailLength).IndexOfAnyExcept((byte)0b10101010));
NativeMemory.AlignedFree(ptr);
}
public void AlignedAllocNonPowerOfTwoAlignmentTest()
{
Assert.Throws <ArgumentException>(() => NativeMemory.AlignedAlloc((uint)sizeof(nuint), (uint)sizeof(nuint) + 1));
Assert.Throws <ArgumentException>(() => NativeMemory.AlignedAlloc((uint)sizeof(nuint), (uint)sizeof(nuint) * 3));
}
public void AlignedAllocZeroAlignmentTest()
{
Assert.Throws <ArgumentException>(() => NativeMemory.AlignedAlloc((uint)sizeof(nuint), 0));
}
public void AlignedAllocOOMTest()
{
Assert.Throws <OutOfMemoryException>(() => NativeMemory.AlignedAlloc(nuint.MaxValue - ((uint)sizeof(nuint) - 1), (uint)sizeof(nuint)));
}
public static unsafe AlignedMemory Allocate(nuint length, nuint alignment) => new AlignedMemory(NativeMemory.AlignedAlloc(length, alignment), (int)length);
public void Setup()
{
arr1 = (int *)NativeMemory.AlignedAlloc(LENGTH, 32);
arr2 = (int *)NativeMemory.AlignedAlloc(LENGTH, 32);
}
private static void *_aligned_malloc([NativeTypeName("size_t")] nuint _Size, [NativeTypeName("size_t")] nuint _Alignment)
{
return(NativeMemory.AlignedAlloc(_Size, _Alignment));
}
