public static void InPlaceUpdater(KeyStruct *key, InputStruct *input, ValueStruct *value)
{
ValueStruct.AcquireWriteLock(value);
value->vfield1 += input->ifield1;
value->vfield2 += input->ifield2;
ValueStruct.ReleaseWriteLock(value);
}
static unsafe void Main(string[] args)
{
var fht = FasterFactory.Create
<KeyStruct, ValueStruct, InputStruct, OutputStruct, Empty, Functions, ICustomFasterKv>
(128, new LogSettings {
LogDevice = FasterFactory.CreateLogDevice(""), MutableFraction = 0.5
});
fht.StartSession();
OutputStruct output = default(OutputStruct);
var key1 = new KeyStruct {
kfield1 = 13, kfield2 = 14
};
var value = new ValueStruct {
vfield1 = 23, vfield2 = 24
};
// Upsert item into store, and read it back
fht.Upsert(&key1, &value, null, 0);
fht.Read(&key1, null, &output, null, 0);
if ((output.value.vfield1 != value.vfield1) || (output.value.vfield2 != value.vfield2))
{
Console.WriteLine("Error!");
}
else
{
Console.WriteLine("Success!");
}
var key2 = new KeyStruct {
kfield1 = 15, kfield2 = 16
};
var input = new InputStruct {
ifield1 = 25, ifield2 = 26
};
// Two read-modify-write (RMW) operations (sum aggregator)
// Followed by read of result
fht.RMW(&key2, &input, null, 0);
fht.RMW(&key2, &input, null, 0);
fht.Read(&key2, null, &output, null, 0);
if ((output.value.vfield1 != input.ifield1 * 2) || (output.value.vfield2 != input.ifield2 * 2))
{
Console.WriteLine("Error!");
}
else
{
Console.WriteLine("Success!");
}
fht.StopSession();
Console.ReadLine();
}
public static void InitialUpdater(KeyStruct *key, InputStruct *input, ValueStruct *value)
{
ValueStruct.Copy((ValueStruct *)input, value);
}
public static int InitialValueLength(KeyStruct *key, InputStruct *input)
{
return(ValueStruct.GetLength(default(ValueStruct *)));
}
public static void ConcurrentWriter(KeyStruct *key, ValueStruct *src, ValueStruct *dst)
{
ValueStruct.AcquireWriteLock(dst);
ValueStruct.Copy(src, dst);
ValueStruct.ReleaseWriteLock(dst);
}
public static void SingleWriter(KeyStruct *key, ValueStruct *src, ValueStruct *dst)
{
ValueStruct.Copy(src, dst);
}
public static void ConcurrentReader(KeyStruct *key, InputStruct *input, ValueStruct *value, OutputStruct *dst)
{
ValueStruct.AcquireReadLock(value);
ValueStruct.Copy(value, (ValueStruct *)dst);
ValueStruct.ReleaseReadLock(value);
}
public static void SingleReader(KeyStruct *key, InputStruct *input, ValueStruct *value, OutputStruct *dst)
{
ValueStruct.Copy(value, (ValueStruct *)dst);
}
