/// <summary>
/// Called to manually trigger a refresh of <see cref="IsCurrent"/>.
/// After completion, <see cref="IsCurrentChanged"/> will always be
/// raised, regardless of whether the values were changed.
/// </summary>
public virtual void RefreshIsCurrent() {
#if DEBUG
// Indicate that we've arrived here at least once. Otherwise we
// will assert.
_hasEverCheckedDatabase = true;
#endif
if (GlobalInterpreterOptions.SuppressFileSystemWatchers || string.IsNullOrEmpty(DatabasePath)) {
_isCheckingDatabase = false;
_isValid = true;
_missingModules = null;
_isCurrentException = null;
OnIsCurrentChanged();
return;
}
if (IsGenerating) {
if (PythonTypeDatabase.IsDatabaseRegenerating(DatabasePath)) {
_isValid = false;
_missingModules = null;
_isCurrentException = null;
return;
}
Interlocked.Exchange(ref _generating, null);
}
try {
if (!_isCurrentSemaphore.Wait(0)) {
// Another thread is working on our state, so we will wait for
// them to finish and return, since the value is up to date.
_isCurrentSemaphore.Wait();
_isCurrentSemaphore.Release();
return;
}
} catch (ObjectDisposedException) {
// We've been disposed and the call has come in from
// externally, probably a timer.
return;
}
try {
_isCheckingDatabase = true;
OnIsCurrentChanged();
// Wait for a slot that will allow us to scan the disk. This
// prevents too many threads from updating at once and causing
// I/O saturation.
_sharedIsCurrentSemaphore.Wait();
try {
if (PythonTypeDatabase.IsDatabaseRegenerating(DatabasePath) ||
!PythonTypeDatabase.IsDatabaseVersionCurrent(DatabasePath)) {
// Skip the rest of the checks, because we know we're
// not current.
_isValid = false;
_missingModules = null;
_isCurrentException = null;
} else {
_isValid = true;
HashSet<string> existingDatabase = null;
string[] missingModules = null;
for (int retries = 3; retries > 0; --retries) {
try {
existingDatabase = GetExistingDatabase(DatabasePath);
break;
} catch (UnauthorizedAccessException) {
} catch (IOException) {
}
Thread.Sleep(100);
}
if (existingDatabase == null) {
// This will either succeed or throw again. If it throws
// then the error is reported to the user.
existingDatabase = GetExistingDatabase(DatabasePath);
}
for (int retries = 3; retries > 0; --retries) {
try {
missingModules = GetMissingModules(existingDatabase);
break;
} catch (UnauthorizedAccessException) {
} catch (IOException) {
}
Thread.Sleep(100);
}
if (missingModules == null) {
// This will either succeed or throw again. If it throws
// then the error is reported to the user.
missingModules = GetMissingModules(existingDatabase);
}
if (missingModules.Length > 0) {
var oldModules = _missingModules;
if (oldModules == null ||
oldModules.Length != missingModules.Length ||
!oldModules.SequenceEqual(missingModules)) {
}
_missingModules = missingModules;
} else {
_missingModules = null;
}
}
_isCurrentException = null;
} finally {
_sharedIsCurrentSemaphore.Release();
}
} catch (Exception ex) {
// Report the exception text as the reason.
_isCurrentException = ex.ToString();
_missingModules = null;
} finally {
_isCheckingDatabase = false;
try {
_isCurrentSemaphore.Release();
} catch (ObjectDisposedException) {
// The semaphore is not locked for disposal as it is only
// used to prevent reentrance into this function. As a
// result, it may have been disposed while we were in here.
}
}
OnIsCurrentChanged();
}
/// <summary>
/// Clears any cached type databases and raises the
/// <see cref="NewDatabaseAvailable"/> event.
/// </summary>
protected void OnNewDatabaseAvailable() {
_typeDb = null;
_typeDbWithoutPackages = null;
NewDatabaseAvailable?.Invoke(this, EventArgs.Empty);
}
public CPythonType(IMemberContainer parent, ITypeDatabaseReader typeDb, string typeName, Dictionary <string, object> typeTable, BuiltinTypeId typeId)
{
Debug.Assert(parent is CPythonType || parent is CPythonModule);
Debug.Assert(!typeId.IsVirtualId());
_typeName = typeName;
_typeId = typeId;
_module = GetDeclaringModule(parent);
object value;
if (typeTable.TryGetValue("is_hidden", out value))
{
_includeInModule = !Convert.ToBoolean(value);
}
else
{
_includeInModule = true;
}
if (typeTable.TryGetValue("doc", out value))
{
_doc = value as string;
}
if (typeTable.TryGetValue("builtin", out value))
{
_isBuiltin = Convert.ToBoolean(value);
}
else
{
_isBuiltin = true;
}
if (typeTable.TryGetValue("bases", out value))
{
var basesList = (List <object>)value;
if (basesList != null)
{
_bases = new List <IPythonType>();
foreach (var baseType in basesList)
{
typeDb.LookupType(baseType, StoreBase);
}
}
}
if (typeTable.TryGetValue("mro", out value))
{
var mroList = (List <object>)value;
if (mroList != null && mroList.Count >= 1)
{
_mro = new IPythonType[mroList.Count];
// Many scraped types have invalid MRO entries because they
// report their own module/name incorrectly. Since the first
// item in the MRO is always self, we set it now. If the MRO
// has a resolvable entry it will replace this one.
_mro[0] = this;
for (int i = 0; i < mroList.Count; ++i)
{
var capturedI = i;
typeDb.LookupType(mroList[i], t => _mro[capturedI] = t);
}
}
}
if (typeTable.TryGetValue("members", out value))
{
var membersTable = (Dictionary <string, object>)value;
if (membersTable != null)
{
LoadMembers(typeDb, membersTable);
}
}
_hasLocation = PythonTypeDatabase.TryGetLocation(typeTable, ref _line, ref _column);
}
