/// <summary>
/// Sets instance specific parameters after an Ese instance has been created.
/// </summary>
/// <param name="instance">The instance handle to use.</param>
public void SetInstanceParams(JET_INSTANCE instance)
{
Action <DatabaseConfig, JET_INSTANCE, int> setParamIfExists = (engineConfig, inst, param) =>
{
object value;
if (engineConfig.ParamStore.TryGetValue(param, out value))
{
DatabaseConfig.SetParamOnInstance(inst, param, value);
}
};
// First, set parameters that require to be set in a particular order
#if !ESENT && !MANAGEDESENT_ON_WSA
setParamIfExists(this, instance, (int)Windows10Param.ConfigStoreSpec);
#endif
setParamIfExists(this, instance, (int)VistaParam.EnableAdvanced);
setParamIfExists(this, instance, (int)VistaParam.Configuration);
for (int i = 0; i < DatabaseConfig.ParamTable.Length; i++)
{
if (!DatabaseConfig.ParamTable[i].StaticAfterGlobalInit
#if !ESENT && !MANAGEDESENT_ON_WSA
&& i != (int)Windows10Param.ConfigStoreSpec
#endif
&& i != (int)VistaParam.EnableAdvanced &&
i != (int)VistaParam.Configuration)
{
setParamIfExists(this, instance, i);
}
}
}
/// <summary>
/// Sets global parameters before an Ese instance is created.
/// </summary>
public void SetGlobalParams()
{
// Lock this section using a process-wide lock, so in case of a race between two threads, a config set is either completely set or completely over-written
DatabaseConfig.GlobalParamsMutex.WaitOne();
try
{
for (int i = 0; i < DatabaseConfig.ParamTable.Length; i++)
{
// This check ensures that only global params that must be set before global init are set here
// This protects instance params from being set before instance init. Setting them here would change the defaults for these params
// for all future instances. That would be really bad because the settings contained in the current config set would 'spill over'
// into future config sets.
if (DatabaseConfig.ParamTable[i].StaticAfterGlobalInit)
{
object valueToSet;
if (this.ParamStore.TryGetValue(i, out valueToSet))
{
object currValue;
DatabaseConfig.TryGetParamFromInstance(JET_INSTANCE.Nil, i, out currValue);
if (!currValue.Equals(valueToSet))
{
DatabaseConfig.SetParamOnInstance(JET_INSTANCE.Nil, i, valueToSet);
}
}
}
}
}
finally
{
DatabaseConfig.GlobalParamsMutex.ReleaseMutex();
}
}
