C++ (Cpp) ipc_entry_alloc Beispiele

Beispiel #1

Datei: ipc_object.c Projekt: SbIm/xnu-env

kern_return_t
ipc_object_alloc(
	ipc_space_t		space,
	ipc_object_type_t	otype,
	mach_port_type_t	type,
	mach_port_urefs_t	urefs,
	mach_port_name_t	*namep,
	ipc_object_t		*objectp)
{
	ipc_object_t object;
	ipc_entry_t entry;
	kern_return_t kr;

	assert(otype < IOT_NUMBER);
	assert((type & MACH_PORT_TYPE_ALL_RIGHTS) == type);
	assert(type != MACH_PORT_TYPE_NONE);
	assert(urefs <= MACH_PORT_UREFS_MAX);

	object = io_alloc(otype);
	if (object == IO_NULL)
		return KERN_RESOURCE_SHORTAGE;

	if (otype == IOT_PORT) {
		ipc_port_t port = (ipc_port_t)object;

		bzero((char *)port, sizeof(*port));
#if CONFIG_MACF_MACH
		mac_port_label_init(&port->ip_label);
#endif
	} else if (otype == IOT_PORT_SET) {
		ipc_pset_t pset = (ipc_pset_t)object;

		bzero((char *)pset, sizeof(*pset));
	}

	io_lock_init(object);
	*namep = CAST_MACH_PORT_TO_NAME(object);
	kr = ipc_entry_alloc(space, namep, &entry);
	if (kr != KERN_SUCCESS) {
		io_free(otype, object);
		return kr;
	}
	/* space is write-locked */

	entry->ie_bits |= type | urefs;
	entry->ie_object = object;

	io_lock(object);
	is_write_unlock(space);

	object->io_references = 1; /* for entry, not caller */
	object->io_bits = io_makebits(TRUE, otype, 0);

	*objectp = object;
	return KERN_SUCCESS;
}

Beispiel #2

Datei: ipc_object.c Projekt: quan-na/gnumach

kern_return_t
ipc_object_alloc(
	ipc_space_t		space,
	ipc_object_type_t	otype,
	mach_port_type_t	type,
	mach_port_urefs_t	urefs,
	mach_port_t		*namep,
	ipc_object_t		*objectp)
{
	ipc_object_t object;
	ipc_entry_t entry;
	kern_return_t kr;

	assert(otype < IOT_NUMBER);
	assert((type & MACH_PORT_TYPE_ALL_RIGHTS) == type);
	assert(type != MACH_PORT_TYPE_NONE);
	assert(urefs <= MACH_PORT_UREFS_MAX);

	object = io_alloc(otype);
	if (object == IO_NULL)
		return KERN_RESOURCE_SHORTAGE;

	if (otype == IOT_PORT) {
		ipc_port_t port = (ipc_port_t)object;

		memset(port, 0, sizeof(*port));
	} else if (otype == IOT_PORT_SET) {
		ipc_pset_t pset = (ipc_pset_t)object;

		memset(pset, 0, sizeof(*pset));
	}
	is_write_lock(space);
	kr = ipc_entry_alloc(space, namep, &entry);
	if (kr != KERN_SUCCESS) {
		is_write_unlock(space);
		io_free(otype, object);
		return kr;
	}

	entry->ie_bits |= type | urefs;
	entry->ie_object = object;

	io_lock_init(object);
	io_lock(object);
	is_write_unlock(space);

	object->io_references = 1; /* for entry, not caller */
	object->io_bits = io_makebits(TRUE, otype, 0);

	*objectp = object;
	return KERN_SUCCESS;
}

Beispiel #3

Datei: ipc_object.c Projekt: wzw19890321/xnu-1

kern_return_t
ipc_object_alloc_dead(
	ipc_space_t		space,
	mach_port_name_t	*namep)
{
	ipc_entry_t entry;
	kern_return_t kr;

	kr = ipc_entry_alloc(space, namep, &entry);
	if (kr != KERN_SUCCESS)
		return kr;
	/* space is write-locked */

	/* null object, MACH_PORT_TYPE_DEAD_NAME, 1 uref */

	assert(entry->ie_object == IO_NULL);
	entry->ie_bits |= MACH_PORT_TYPE_DEAD_NAME | 1;
	ipc_entry_modified(space, *namep, entry);
	is_write_unlock(space);
	return KERN_SUCCESS;
}

Beispiel #4

Datei: ipc_object.c Projekt: quan-na/gnumach

kern_return_t
ipc_object_copyout(
	ipc_space_t		space,
	ipc_object_t		object,
	mach_msg_type_name_t	msgt_name,
	boolean_t		overflow,
	mach_port_t		*namep)
{
	mach_port_t name;
	ipc_entry_t entry;
	kern_return_t kr;

	assert(IO_VALID(object));
	assert(io_otype(object) == IOT_PORT);

	is_write_lock(space);

	for (;;) {
		if (!space->is_active) {
			is_write_unlock(space);
			return KERN_INVALID_TASK;
		}

		if ((msgt_name != MACH_MSG_TYPE_PORT_SEND_ONCE) &&
		    ipc_right_reverse(space, object, &name, &entry)) {
			/* object is locked and active */

			assert(entry->ie_bits & MACH_PORT_TYPE_SEND_RECEIVE);
			break;
		}

		kr = ipc_entry_alloc(space, &name, &entry);
		if (kr != KERN_SUCCESS) {
			is_write_unlock(space);
			return kr;
		}

		assert(IE_BITS_TYPE(entry->ie_bits) == MACH_PORT_TYPE_NONE);
		assert(entry->ie_object == IO_NULL);

		io_lock(object);
		if (!io_active(object)) {
			io_unlock(object);
			ipc_entry_dealloc(space, name, entry);
			is_write_unlock(space);
			return KERN_INVALID_CAPABILITY;
		}

		entry->ie_object = object;
		break;
	}

	/* space is write-locked and active, object is locked and active */

	kr = ipc_right_copyout(space, name, entry,
			       msgt_name, overflow, object);
	/* object is unlocked */
	is_write_unlock(space);

	if (kr == KERN_SUCCESS)
		*namep = name;
	return kr;
}