/// <summary>
/// Create an instance and get the current version of Esent.
/// </summary>
/// <returns>The current version of Esent.</returns>
private uint GetVersionFromEsent()
{
#if MANAGEDESENT_ON_WSA
// JetGetVersion isn't available in new Windows user interface, so we'll pretend it's always Win8:
return(8250 << 8);
#else
// Create a unique name so that multiple threads can call this simultaneously.
// This can happen if there are multiple AppDomains.
string instanceName = string.Format(CultureInfo.InvariantCulture, "GettingEsentVersion{0}", LibraryHelpers.GetCurrentManagedThreadId());
JET_INSTANCE instance = JET_INSTANCE.Nil;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
this.JetCreateInstance(out instance, instanceName);
this.JetSetSystemParameter(instance, JET_SESID.Nil, JET_param.Recovery, new IntPtr(0), "off");
this.JetSetSystemParameter(instance, JET_SESID.Nil, JET_param.NoInformationEvent, new IntPtr(1), null);
this.JetSetSystemParameter(instance, JET_SESID.Nil, JET_param.MaxTemporaryTables, new IntPtr(0), null);
this.JetSetSystemParameter(instance, JET_SESID.Nil, JET_param.MaxCursors, new IntPtr(16), null);
this.JetSetSystemParameter(instance, JET_SESID.Nil, JET_param.MaxOpenTables, new IntPtr(16), null);
this.JetSetSystemParameter(instance, JET_SESID.Nil, JET_param.MaxVerPages, new IntPtr(4), null);
this.JetSetSystemParameter(instance, JET_SESID.Nil, JET_param.MaxSessions, new IntPtr(1), null);
this.JetInit(ref instance);
JET_SESID sesid;
this.JetBeginSession(instance, out sesid, string.Empty, string.Empty);
try
{
uint version;
this.JetGetVersion(sesid, out version);
return(version);
}
finally
{
this.JetEndSession(sesid, EndSessionGrbit.None);
}
}
finally
{
if (JET_INSTANCE.Nil != instance)
{
this.JetTerm(instance);
}
}
#endif
}
