public static void DemonstrateUseOfExtensionMethodsToSimplify()
{
const string methodName = nameof(DemonstrateUseOfExtensionMethodsToSimplify);
Console.WriteLine();
Console.WriteLine($"Performing {methodName}...");
MutableResourceVault <StringBuilder> vault = CreateExampleVault();
using var lck = vault.SpinLock();
Console.WriteLine("Contents: {0}", lck.GetContents());
Console.WriteLine("First char: {0}", lck.GetCharAt(0));
//make second char uppercase E
lck.SetCharAt(1, 'E');
Console.WriteLine("Changed to uppercase 'E': {0}", lck.GetContents());
Console.WriteLine();
}
public static void DemonstrateActions()
{
const string methodName = nameof(DemonstrateActions);
Console.WriteLine();
Console.WriteLine($"Performing {methodName}...");
MutableResourceVault <StringBuilder> vault = CreateExampleVault();
using var lck = vault.SpinLock();
lck.ExecuteAction((ref StringBuilder res) =>
{
for (int i = 0; i < res.Length; ++i)
{
char current = res[i];
if (char.IsLetter(current))
{
res[i] = char.IsLower(current) ? char.ToUpper(current) : char.ToLower(current);
}
}
});
string contents = lck.ExecuteQuery((in StringBuilder sb)
=> sb.ToString());
Console.WriteLine("Reversed Upper/Lower res: " +
$"{contents}");
//now let's make every char at idx divisible by three change to q
int divisibleBy = 3;
lck.ExecuteAction((ref StringBuilder res, in int d) =>
{
for (int i = 0; i < res.Length; ++i)
{
if (i % d == 0)
{
res[i] = 'q';
}
}
}, divisibleBy);
contents = lck.ExecuteQuery((in StringBuilder sb)
=> sb.ToString());
Console.WriteLine($"Made chars at idx divisble by 3 q: " +
$"[{contents}]");
Console.WriteLine();
}
public static void DemonstrateMixedOperations()
{
const string methodName = nameof(DemonstrateMixedOperations);
Console.WriteLine();
Console.WriteLine($"Performing {methodName}...");
MutableResourceVault <StringBuilder> vault = CreateExampleVault();
using var lck =
vault.SpinLock();
//Find the index of the first char equal to 'o' and insert
//" it's magic oooh oooh! " after it.
//return the index and the new contents.
string insertMe = " it's magic oooh oooh! ";
char queryLetter = 'o';
IndexAndVal res = lck.ExecuteMixedOperation(
(ref StringBuilder sb, in char ql) =>
{
int idx = -1;
for (int i = 0; i < sb.Length; ++i)
{
if (sb[i] == ql)
{
idx = i;
break;
}
}
if (idx != -1)
{
sb.Insert(idx + 1, insertMe);
}
return(new IndexAndVal(sb.ToString(), idx));
}, queryLetter);
Console.WriteLine($"New value: [{res.NewValue}], " +
$"Index: [{res.Idx}].");
Console.WriteLine();
}
public static void ShowWrapperUsage()
{
Console.WriteLine("Begin showing wrapper usage.");
MutableResourceVault <List <int> > vault =
MutableResourceVault <List <int> > .CreateAtomicMutableResourceVault(() =>
new List <int> {
1, 2, 3, 4
},
TimeSpan.FromMilliseconds(250));
ImmutableArray <int> finalContents;
{
using var lck =
vault.SpinLock();
List <int> addUs = new List <int> {
5, 6, 7, 8
};
//ERROR DotNetVault_VsDelegateCapture cannot capute non-vault
//safe param addUs, of type List, not vault-safe
//lck.ExecuteAction((ref List<int> res) => res.AddRange(addUs));
//Ok reference is to thin readonly wrapper around list of vault-safe type.
//state cannot be commingled in the delegate.
VsListWrapper <int> wrapper = VsListWrapper <int> .FromList(addUs);
lck.ExecuteAction((ref List <int> res) => res.AddRange(wrapper));
finalContents = lck.ExecuteQuery((in List <int> res) =>
res.ToImmutableArray());
}
Console.WriteLine("Printing final contents: ");
StringBuilder sb = new StringBuilder("{");
foreach (var i in finalContents)
{
sb.Append($"{i}, ");
}
if (sb[^ 1] == ' ' && sb[^ 2] == ',')
public static void DemonstrateQueries()
{
const string methodName = nameof(DemonstrateQueries);
Console.WriteLine();
Console.WriteLine($"Performing {methodName}...");
MutableResourceVault <StringBuilder> vault = CreateExampleVault();
using var lck = vault.SpinLock();
string contents = lck.ExecuteQuery((in StringBuilder res) => res.ToString());
Console.WriteLine($"Contents: {contents}.");
int ancillaryValue = 7;
int lengthPlusAncillaryValue =
lck.ExecuteQuery((in StringBuilder sb, in int anc) => sb.Length + anc,
ancillaryValue);
Console.WriteLine("Length of contents (content length: " +
$"[{lck.ExecuteQuery( (in StringBuilder sb) => sb.Length)}]) " +
$"plus [{nameof(ancillaryValue)}] of [{ancillaryValue}]: " +
$"{lengthPlusAncillaryValue.ToString()}");
int idx = 1;
char offSet = (char)32;
char valOfCharSpecifiedIndexMadeUppercase =
lck.ExecuteQuery(
(in StringBuilder sb, in char offset) =>
(char)(sb[idx] - offSet), offSet);
Console.WriteLine($"Char at idx [{idx.ToString()}] " +
$"(current val: [{contents[1]}]) made upper " +
$"case: [{valOfCharSpecifiedIndexMadeUppercase}].");
Console.WriteLine();
Console.WriteLine("Bug50Demo3 START");
Bug50Demo3();
Console.WriteLine("Bug50Demo3 END");
}
