bool IOWorkLoop::init()
{
// The super init and gateLock allocation MUST be done first
if ( !super::init() )
return false;
if ( gateLock == NULL ) {
if ( !( gateLock = IORecursiveLockAlloc()) )
return false;
}
if ( workToDoLock == NULL ) {
if ( !(workToDoLock = IOSimpleLockAlloc()) )
return false;
IOSimpleLockInit(workToDoLock);
workToDo = false;
}
if ( controlG == NULL ) {
controlG = IOCommandGate::commandGate(
this,
OSMemberFunctionCast(
IOCommandGate::Action,
this,
&IOWorkLoop::_maintRequest));
if ( !controlG )
return false;
// Point the controlGate at the workLoop. Usually addEventSource
// does this automatically. The problem is in this case addEventSource
// uses the control gate and it has to be bootstrapped.
controlG->setWorkLoop(this);
if (addEventSource(controlG) != kIOReturnSuccess)
return false;
}
if ( workThread == NULL ) {
thread_continue_t cptr = OSMemberFunctionCast(
thread_continue_t,
this,
&IOWorkLoop::threadMain);
if (KERN_SUCCESS != kernel_thread_start(cptr, this, &workThread))
return false;
}
return true;
}
bool IOWorkLoop::init()
{
// The super init and gateLock allocation MUST be done first.
if ( !super::init() )
return false;
// Allocate our ExpansionData if it hasn't been allocated already.
if ( !reserved )
{
reserved = IONew(ExpansionData,1);
if ( !reserved )
return false;
bzero(reserved,sizeof(ExpansionData));
}
#if DEBUG
OSBacktrace ( reserved->allocationBacktrace, sizeof ( reserved->allocationBacktrace ) / sizeof ( reserved->allocationBacktrace[0] ) );
#endif
if ( gateLock == NULL ) {
if ( !( gateLock = IORecursiveLockAlloc()) )
return false;
}
if ( workToDoLock == NULL ) {
if ( !(workToDoLock = IOSimpleLockAlloc()) )
return false;
IOSimpleLockInit(workToDoLock);
workToDo = false;
}
if (!reserved) {
reserved = IONew(ExpansionData, 1);
reserved->options = 0;
}
IOStatisticsRegisterCounter();
if ( controlG == NULL ) {
controlG = IOCommandGate::commandGate(
this,
OSMemberFunctionCast(
IOCommandGate::Action,
this,
&IOWorkLoop::_maintRequest));
if ( !controlG )
return false;
// Point the controlGate at the workLoop. Usually addEventSource
// does this automatically. The problem is in this case addEventSource
// uses the control gate and it has to be bootstrapped.
controlG->setWorkLoop(this);
if (addEventSource(controlG) != kIOReturnSuccess)
return false;
}
if ( workThread == NULL ) {
thread_continue_t cptr = OSMemberFunctionCast(
thread_continue_t,
this,
&IOWorkLoop::threadMain);
if (KERN_SUCCESS != kernel_thread_start(cptr, this, &workThread))
return false;
}
(void) thread_set_tag(workThread, THREAD_TAG_IOWORKLOOP);
return true;
}
