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    • 23. 发明授权
    • Transfer of control method and means among hierarchical cooperating
sequential processes
    • 分级合作顺序流程中控制方法和手段的转移
    • US4410940A
    • 1983-10-18
    • US213268
    • 1980-12-05
    • Eric D. CarlsonHenry M. GladneyPeter LucasDaniel L. WellerStephen N. Zilles
    • Eric D. CarlsonHenry M. GladneyPeter LucasDaniel L. WellerStephen N. Zilles
    • G06F9/48G06F9/06
    • G06F9/4881
    • A method for transferring control between hierarchically related cooperating sequential processes P and Q executable in a multi-processing CPU environment. The method uses pointers to identify active and suspended processes. The method steps comprise generating and memory storing activation records; transferring control from process P to process Q, and updating the process pointers to record the suspension of process P and the activation of process Q; and resuming execution in the most recently executing subprocesses of Q by reference to the process pointers.There is stored in memory one activation record per process. The record includes a pointer to the activation that is the parent of the process, a pointer to the most recently executing subprocess of the process, and information defining the current execution state of the process. These pointers are further constrained such that the set of activation records form the nodes of a tree whose arcs are defined by the parent pointers. The descendants of any node P, together with P itself, constitute the subprocesses of P. For any node P the process pointer of P always points to a subprocess of P. The transfer of control from process P to process Q involves the concurrent updating of the process pointers to record the suspension of process P and the activation of process Q.
    • 一种用于在多处理CPU环境中可执行的层级相关的协作顺序进程P和Q之间传送控制的方法。 该方法使用指针来标识活动和挂起的进程。 方法步骤包括产生和存储存储激活记录; 将过程P的控制转移到处理Q,并更新过程指针以记录过程P的暂停和过程Q的激活; 并且通过参考处理指针在最近执行的Q的子进程中恢复执行。 每个进程存储一个激活记录。 记录包括指向进程的父进程的指针,指向进程最近执行的子进程的指针以及定义进程的当前执行状态的信息。 这些指针被进一步约束,使得该组激活记录形成由其父指针定义其圆弧的树的节点。 任何节点P的后代与P本身一起构成P的子进程。对于任何节点P,P的进程指针总是指向P的子进程。从进程P到进程Q的控制的转移涉及并行更新 过程指针记录过程P的暂停和过程Q的激活。