public void Enqueue(ServiceRequest req)
{
// For now disable interrupts:
bool iflag = Processor.DisableInterrupts();
spinLock.Acquire();
try {
if (head == null)
{
head = req;
tail = req;
}
else
{
tail.next = req;
tail = req;
}
}
finally {
spinLock.Release();
}
// Signal an event : for now it is possible that it can be spirous one...
enqueueEvent.InterruptAwareSet();
// Reenable interrupts
Processor.RestoreInterrupts(iflag);
}
private static bool Lock()
{
bool enabled = Processor.DisableInterrupts();
#if SINGULARITY_MP
rangeLock.Acquire(Thread.CurrentThread);
#endif // SINGULARITY_MP
return(enabled);
}
static internal unsafe void AddProcessorContext(ProcessorContext *context)
{
// Add processor to list of processors in MP system. Careful
// to avoid adding processor mid-freeze or without lock.
start:
freezeLock.Acquire();
try {
if (FreezeRequested)
{
goto start;
}
ProcessorContext *head = Processor.processorTable[0].context;
context->nextProcessorContext = head->nextProcessorContext;
head->nextProcessorContext = context;
context->ipiFreeze = Running;
// From this point on the processor is visible
// in the debugger
DebugStub.AddProcessor(context->cpuRecord.id);
}
finally {
freezeLock.Release();
}
}
// Create a log entry for the allocation that just occurred on this thread.
protected override void Allocation(UIntPtr objAddr, Type type, UIntPtr size)
{
bool iflag;
// We cannot recurse inside an Allocation notification, or we will simply
// blow the stack on the first entry. Also, we don't want to log allocations
// that occur as a consequence of logging the state of the GC heap -- though
// we could support that if we chose to.
if (enabled &&
recurseThread != Thread.CurrentThread && // recurse?
Buffer.OwningThread != Thread.CurrentThread) // GC logging?
{
iflag = Processor.DisableLocalPreemption();
allocationLock.Acquire();
try {
DebugStub.Assert(recurseThread == null);
recurseThread = Thread.CurrentThread;
Buffer.LogTick();
uint stackSize = Isa.GetStackReturnAddresses(stackEips);
uint stkNo = 0;
if (stackSize > 0)
{
stkNo = GetStackId(type, size, stackEips, stackSize);
}
ProfilerBuffer.LogAllocation(Thread.CurrentThread.GetThreadId(), objAddr, stkNo);
}
finally {
recurseThread = null;
allocationLock.Release();
Processor.RestoreLocalPreemption(iflag);
}
}
}
private void AcquireLock()
{
rtcSpinLock.Acquire();
}
