- The data structure used to contain a process's software context. The operation system defines a software PCB for every process when the process is created. The software PCB includes the following kinds of information about the process: current state; storage address if it is swapped out of memory; unique identification of the process; and address of the process header (which contains the hardware PCB). The software PCB resides in system region virtual address space. It is not swapped with a process.; 一種數(shù)據(jù)結(jié)構(gòu),用于容納進(jìn)程的前后關(guān)系。在進(jìn)程建立時(shí),操作系統(tǒng)為每一個(gè)進(jìn)程定義一個(gè)軟件進(jìn)程控制 塊(PCB)。軟件PCB中含有該進(jìn)程的下列各類信息: 當(dāng)前狀態(tài)、換出內(nèi)存時(shí)的存儲(chǔ)器 地址、進(jìn)程的唯一標(biāo)識(shí)符,以及進(jìn)程標(biāo)題(含有硬件進(jìn)程控制塊)的地址。軟件PCB駐在系統(tǒng) 區(qū)虛地址空間,它不與進(jìn)程進(jìn)行交換。Software Process Control Block的縮寫。
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