本文整理汇总了C++中KPartition::Size方法的典型用法代码示例。如果您正苦于以下问题：C++ KPartition::Size方法的具体用法？C++ KPartition::Size怎么用？C++ KPartition::Size使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类KPartition的用法示例。
在下文中一共展示了KPartition::Size方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: locker
status_t
_user_resize_partition(partition_id partitionID, int32* _changeCounter,
partition_id childID, int32* _childChangeCounter, off_t size,
off_t contentSize)
{
// copy parameters in
int32 changeCounter;
int32 childChangeCounter;
status_t error = copy_from_user_value(changeCounter, _changeCounter);
if (error == B_OK)
error = copy_from_user_value(childChangeCounter, _childChangeCounter);
if (error != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// register child
KPartition* child = manager->RegisterPartition(childID);
if (child == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar3(child, true);
// check change counters
if (changeCounter != partition->ChangeCounter()
|| childChangeCounter != child->ChangeCounter()) {
return B_BAD_VALUE;
}
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (diskSystem == NULL)
return B_BAD_VALUE;
// child must indeed be a child of partition
if (child->Parent() != partition)
return B_BAD_VALUE;
// check sizes
if (size < 0 || contentSize < 0 || size < contentSize
|| size > partition->ContentSize()) {
return B_BAD_VALUE;
}
// mark the partitions busy and unlock
if (partition->IsBusy() || child->IsBusy())
return B_BUSY;
partition->SetBusy(true);
child->SetBusy(true);
locker.Unlock();
// resize contents first, if shrinking
if (child->DiskSystem() && contentSize < child->ContentSize())
error = child->DiskSystem()->Resize(child, contentSize, DUMMY_JOB_ID);
// resize the partition
if (error == B_OK && size != child->Size())
error = diskSystem->ResizeChild(child, size, DUMMY_JOB_ID);
// resize contents last, if growing
if (error == B_OK && child->DiskSystem()
&& contentSize > child->ContentSize()) {
error = child->DiskSystem()->Resize(child, contentSize, DUMMY_JOB_ID);
}
// re-lock and unmark busy
locker.Lock();
partition->SetBusy(false);
child->SetBusy(false);
if (error != B_OK)
return error;
// return change counters
error = copy_to_user_value(_changeCounter, partition->ChangeCounter());
if (error == B_OK)
error = copy_to_user_value(_childChangeCounter, child->ChangeCounter());
return error;
}