UpdateReferenceSideEffect UpdateReferencesByBuild(int amount, EngineBuildHandle buildHandle)
{
var side_effect = UpdateReferenceSideEffect.None;
if (Prototype.SystemRequiresReferenceTracking)
{
EngineBuildHandle engine, branch;
buildHandle.ExtractHandles(out engine, out branch);
int revisn_count, branch_count, engine_count;
lock (mReferencesByBuildCounts)
{
revisn_count = UpdateReferencesByHandle(amount, buildHandle, ref side_effect);
branch_count = UpdateReferencesByHandle(amount, branch, ref side_effect);
engine_count = UpdateReferencesByHandle(amount, engine, ref side_effect);
}
// Validate that a RemoveReference hasn't made a count go negative (ie, there was an extra call)
if (amount < 0)
{
if (revisn_count < 0 || branch_count < 0 || engine_count < 0)
{
throw new InvalidOperationException(string.Format(
"Extra or bad RemoveReference call detected for {0} using the handle {1}",
Prototype, buildHandle.ToDisplayString()));
}
}
}
else
{
int new_count = UpdateReferencesByHandle(amount, EngineBuildHandle.None, ref side_effect);
// Validate that a RemoveReference hasn't made a count go negative (ie, there was an extra call)
if (amount < 0)
{
if (new_count < 0)
{
throw new InvalidOperationException(string.Format(
"Extra or bad RemoveReference call detected for {0}",
Prototype));
}
}
}
return(side_effect);
}
EngineSystemBase GetSystem(Values.KGuid systemGuid, EngineBuildHandle forBuild)
{
if (!SupportsSystem(systemGuid))
{
string system_display_name = EngineRegistry.GetSystemDebugDisplayString(systemGuid);
string msg = string.Format("{0} doesn't support the system {1}",
forBuild.ToDisplayString(), system_display_name);
throw new InvalidOperationException(msg);
}
var system_metadata = EngineRegistry.TryGetRegisteredSystem(systemGuid);
Contract.Assume(system_metadata != null);
return(GetNewOrExistingSystem(system_metadata));
}