Description

The MetaConstructor is the originator of new Factory objects. Factories provide the basic program construction service of the EROS system.

The newly fabricated factory is created in the build state (see the factory concept and Factory pages). The initial state of the newly created factory contain:

Item	Value
KR3	A factory copy key to the newly created factory.
start address	The initial PC of the factory product (initially 0).

Operations

Check Alleged Key Type (OC = KT)

Returns the alleged type of the object.

Reply

R1

AKT_MetaConstructor: Key is a metaconstructor key.

Create a Factory (OC = 1)

Creates a new factory in the initial state described above, and returns a builder's key to the factory. The process creator of this factory is a newly created process creator.

Request	SK0	A prompt space bank.
Reply	RK0	A builder's key to the new factory.
Result	RC_OK	Operation completed successfully.
	RC_NoMoreNodes	Space bank ran out of nodes while creating new factory. All successfully allocated nodes and pages have been returned to the space bank. RK0 is a void key.
	RC_NoMorePages	Space bank ran out of pages while creating new factory. All successfully allocated nodes and pages have been returned to the space bank. RK0 is a void key.

Get Fetcher Key (OC = 8)

Creates a new factoryin the initial state described above, and returns a builder's key to the factory. The process creator of this factory is a newly created process creator.

Request	SK0	A requestor's key to a factory created by this factory creator.
Reply	RK0	A fetcher key to the factory designated by SK0.
Result	0	Mutex ownership granted.