public unsafe void Scratch_file_is_aware_of_potentialy_active_readers()
{
var numberOfPages = 20;
var handle = NativeMemory.AllocateMemory(numberOfPages * Constants.Storage.PageSize);
using (var env = StorageEnvironmentOptions.CreateMemoryOnly())
using (var pager = env.CreateScratchPager("temp", 65 * 1024))
using (var file = new ScratchBufferFile(pager, 0))
{
Assert.False(file.HasActivelyUsedBytes(2));
file.Allocate(null, 1, 1);
file.Allocate(null, 1, 1);
file.Allocate(null, 1, 1);
file.Allocate(null, 1, 1);
file.Allocate(null, 1, 1);
file.Free(0, 1);
file.Free(1, 3);
file.Free(2, 4);
file.Free(3, 7);
file.Free(4, 9);
for (int i = 0; i <= 9; i++)
{
Assert.True(file.HasActivelyUsedBytes(i));
}
Assert.False(file.HasActivelyUsedBytes(10));
Assert.False(file.HasActivelyUsedBytes(20));
}
}
public unsafe void Scratch_file_is_aware_of_potentialy_active_readers()
{
var numberOfPages = 20;
var handle = NativeMemory.AllocateMemory(numberOfPages * Constants.Storage.PageSize);
var buffer = new PureMemoryJournalWriter.Buffer
{
Pointer = handle,
SizeInPages = numberOfPages
};
try
{
using (var env = StorageEnvironmentOptions.CreateMemoryOnly())
using (var pager = new FragmentedPureMemoryPager(env, ImmutableAppendOnlyList <PureMemoryJournalWriter.Buffer> .Empty.Append(buffer)))
using (var file = new ScratchBufferFile(pager, 0))
{
Assert.False(file.HasActivelyUsedBytes(2));
file.Allocate(null, 1, 1);
file.Allocate(null, 1, 1);
file.Allocate(null, 1, 1);
file.Allocate(null, 1, 1);
file.Allocate(null, 1, 1);
file.Free(0, 1);
file.Free(1, 3);
file.Free(2, 4);
file.Free(3, 7);
file.Free(4, 9);
for (int i = 0; i <= 9; i++)
{
Assert.True(file.HasActivelyUsedBytes(i));
}
Assert.False(file.HasActivelyUsedBytes(10));
Assert.False(file.HasActivelyUsedBytes(20));
}
}
finally
{
NativeMemory.Free(handle, buffer.SizeInPages);
}
}
