Hydra: The kernel of a multiprocessor operating system
W Wulf, E Cohen, W Corwin, A Jones, R Levin… - Communications of the …, 1974 - dl.acm.org
W Wulf, E Cohen, W Corwin, A Jones, R Levin, C Pierson, F Pollack
Communications of the ACM, 1974•dl.acm.orgThis paper describes the design philosophy of HYDRA—the kernel of an operating system
for C. mmp, the Carnegie-Mellon Multi-Mini-Processor. This philosophy is realized through
the introduction of a generalized notion of “resource,” both physical and virtual, called an
“object.” Mechanisms are presented for dealing with objects, including the creation of new
types, specification of new operations applicable to a given type, sharing, and protection of
any reference to a given object against improper application of any of the operations defined …
for C. mmp, the Carnegie-Mellon Multi-Mini-Processor. This philosophy is realized through
the introduction of a generalized notion of “resource,” both physical and virtual, called an
“object.” Mechanisms are presented for dealing with objects, including the creation of new
types, specification of new operations applicable to a given type, sharing, and protection of
any reference to a given object against improper application of any of the operations defined …
This paper describes the design philosophy of HYDRA—the kernel of an operating system for C.mmp, the Carnegie-Mellon Multi-Mini-Processor. This philosophy is realized through the introduction of a generalized notion of “resource,” both physical and virtual, called an “object.” Mechanisms are presented for dealing with objects, including the creation of new types, specification of new operations applicable to a given type, sharing, and protection of any reference to a given object against improper application of any of the operations defined with respect to that type of object. The mechanisms provide a coherent basis for extension of the system in two directions: the introduction of new facilities, and the creation of highly secure systems.
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