status_t
MessagingService::UnregisterService()
{
// check, if the team calling this function is indeed the server team
thread_info threadInfo;
status_t error = get_thread_info(find_thread(NULL), &threadInfo);
if (error != B_OK)
return error;
if (threadInfo.team != fServerTeam)
return B_BAD_VALUE;
// delete all areas
while (fFirstArea) {
MessagingArea *area = fFirstArea;
fFirstArea = area->NextArea();
delete area;
}
fLastArea = NULL;
// unset the other members
fLockSem = -1;
fCounterSem = -1;
fServerTeam = -1;
return B_OK;
}
// _CommandProcessor
int32
MessagingService::_CommandProcessor()
{
bool commandWaiting = false;
while (!fTerminating) {
// wait for the next command
if (!commandWaiting) {
status_t error = acquire_sem(fCounterSem);
if (error != B_OK)
continue;
} else
commandWaiting = false;
// get it from the first area
MessagingArea *area = fFirstArea;
area->Lock();
while (area->CountCommands() > 0) {
const messaging_command *command = area->PopCommand();
if (!command) {
// something's seriously wrong
ERROR("MessagingService::_CommandProcessor(): area %p (%"
B_PRId32 ") has command count %" B_PRId32 ", but doesn't "
"return any more commands.", area, area->ID(),
area->CountCommands());
break;
}
PRINT("MessagingService::_CommandProcessor(): got command %" B_PRIu32 "\n",
command->command);
// dispatch the command
MessagingCommandHandler *handler
= _GetCommandHandler(command->command);
if (handler) {
handler->HandleMessagingCommand(command->command, command->data,
command->size - sizeof(messaging_command));
} else {
WARNING("MessagingService::_CommandProcessor(): No handler "
"found for command %" B_PRIu32 "\n", command->command);
}
}
// there is a new area we don't know yet
if (!area->NextArea() && area->NextKernelAreaID() >= 0) {
// create it
MessagingArea *nextArea;
status_t error = MessagingArea::Create(area->NextKernelAreaID(),
fLockSem, fCounterSem, nextArea);
if (error == B_OK) {
area->SetNextArea(nextArea);
commandWaiting = true;
} else {
// Bad, but what can we do?
ERROR("MessagingService::_CommandProcessor(): Failed to clone "
"kernel area %" B_PRId32 ": %s\n", area->NextKernelAreaID(),
strerror(error));
}
}
// if the current area is empty and there is a next one, we discard the
// current one
if (area->NextArea() && area->CountCommands() == 0) {
fFirstArea = area->NextArea();
area->Discard();
area->Unlock();
delete area;
} else {
area->Unlock();
}
}
return 0;
}
