/*
* withBytes:
*
* Returns a new IOBufferMemoryDescriptor preloaded with bytes (copied).
* The descriptor's length and capacity are set to the input buffer's size.
*/
IOBufferMemoryDescriptor *
IOBufferMemoryDescriptor::withBytes(const void * inBytes,
vm_size_t inLength,
IODirection inDirection,
bool inContiguous)
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
if (me && !me->initWithPhysicalMask(
kernel_task, inDirection | kIOMemoryUnshared
| (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
inLength, inLength, 0 ))
{
me->release();
me = 0;
}
if (me)
{
// start out with no data
me->setLength(0);
if (!me->appendBytes(inBytes, inLength))
{
me->release();
me = 0;
}
}
return me;
}
IOBufferMemoryDescriptor * IOBufferMemoryDescriptor::withOptions(
IOOptionBits options,
vm_size_t capacity,
vm_offset_t alignment)
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
if (me && !me->initWithPhysicalMask(kernel_task, options, capacity, alignment, 0)) {
me->release();
me = 0;
}
return me;
}
IOBufferMemoryDescriptor * IOBufferMemoryDescriptor::inTaskWithPhysicalMask(
task_t inTask,
IOOptionBits options,
mach_vm_size_t capacity,
mach_vm_address_t physicalMask)
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
if (me && !me->initWithPhysicalMask(inTask, options, capacity, 1, physicalMask))
{
me->release();
me = 0;
}
return me;
}
