OSStatus
MD_CriticalRegionCreate(MDCriticalRegionID * outCriticalRegionID)
{
MDCriticalRegionDataPtr newCriticalRegionPtr;
MPSemaphoreID mpSemaphoreID;
OSStatus err = noErr;
if (outCriticalRegionID == NULL)
return paramErr;
*outCriticalRegionID = NULL;
newCriticalRegionPtr = (MDCriticalRegionDataPtr)MPAllocateAligned(sizeof(MDCriticalRegionData),
kMPAllocateDefaultAligned, kMPAllocateClearMask);
if (newCriticalRegionPtr == NULL)
return memFullErr;
// Note: this semaphore is pre-fired (ready!)
err = MPCreateBinarySemaphore(&mpSemaphoreID);
if (err == noErr)
{
newCriticalRegionPtr->mMPTaskID = kInvalidID;
newCriticalRegionPtr->mDepthCount = 0;
newCriticalRegionPtr->mMPSemaphoreID = mpSemaphoreID;
*outCriticalRegionID = (MDCriticalRegionID)newCriticalRegionPtr;
}
else
{
MPFree((LogicalAddress)newCriticalRegionPtr);
}
return err;
}
static OSStatus HTTPServerProc(void *param)
// This routine is the initial start routine for the server's
// preemptive thread. It unpacks the parameters from the
// context then calls our HTTP server module to execute the server.
{
OSStatus err;
ServerContext *context;
context = (ServerContext *) param;
err = RunHTTPServerMP(context->ipAddr, context->rootVRefNum, context->rootDirID);
MPFree(context);
return err;
}
OSStatus
MD_CriticalRegionDelete(MDCriticalRegionID inCriticalRegionID)
{
MDCriticalRegionDataPtr criticalRegion = (MDCriticalRegionDataPtr)inCriticalRegionID;
OSStatus err = noErr;
if (criticalRegion == NULL)
return paramErr;
if ((criticalRegion->mMPTaskID != kInvalidID) && (criticalRegion->mDepthCount > 0))
return kMPInsufficientResourcesErr;
if (criticalRegion->mMPSemaphoreID != kInvalidID)
err = MPDeleteSemaphore(criticalRegion->mMPSemaphoreID);
if (noErr != err) return err;
criticalRegion->mMPSemaphoreID = kInvalidID;
MPFree((LogicalAddress) criticalRegion);
return noErr;
}
void NewAlloc::operator delete(void* p)
{
MPFree(p);
}
static OSStatus RunOneServer(InetHost ipAddr)
// This routine is the main line of the thread that runs
// an HTTP server. ipAddr is the address on which the
// server is listening.
//
// The routine uses a directory whose name is the
// dotted decimal string representation of ipAddr as the
// root directory of the HTTP server.
{
OSStatus err;
OSStatus junk;
Str255 ipAddrString;
FSSpec dirSpec;
CInfoPBRec cpb;
ServerContext *context;
MPTaskID junkServerThread;
// Allocate a context for the preemptive thread.
err = noErr;
context = (ServerContext *) MPAllocateAligned(sizeof(*context), kMPAllocateDefaultAligned, kNilOptions);
if (context == NULL) {
err = memFullErr;
}
// Fill out the context. We do this here because it needs
// to use services that aren't MP-safe.
if (err == noErr) {
context->ipAddr = ipAddr;
// Get ipAddr as a dotted decimal Pascal string.
OTInetHostToString(ipAddr, ((char *) ipAddrString) + 1);
ipAddrString[0] = OTStrLength(((char *) ipAddrString) + 1);
// Find the associated dirID, creating the directory
// if necessary.
junk = MoreProcGetCurrentProcessFSSpec(&dirSpec);
assert(junk == noErr);
(void) FSMakeFSSpec(dirSpec.vRefNum, dirSpec.parID, ipAddrString, &dirSpec);
context->rootVRefNum = dirSpec.vRefNum;
err = FSpGetCatInfo(&dirSpec, 0, &cpb);
if (err == noErr && ( (cpb.hFileInfo.ioFlAttrib & (1 << 4)) != 0) ) {
context->rootDirID = cpb.hFileInfo.ioDirID;
} else {
err = FSpDirCreate(&dirSpec, 0, (SInt32 *) &context->rootDirID);
}
}
// Start a preemptive thread to run an HTTP server on the IP address.
if (err == noErr) {
err = MPCreateTask(HTTPServerProc, context, 65536, kInvalidID, NULL, NULL, kNilOptions, &junkServerThread);
if (err == noErr) {
context = NULL; // it's now the task's responsibility
}
}
if (context != NULL) {
MPFree(context);
}
return err;
}
