...把将要接替这个进程占用CPU的那个进程的上下文从进程表中读出,并更新相应的寄存器,这个过程称为上下文交换(Process context switch)。 而对于fork进程,当执行到pid=fork(); 操作系统创建一个新的进程(子进程),并且在进程表中相应的为他创建一个新的表项。
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可以根据需要将上下文交换 Portlet 显示为附加的动态 Portlet,并且在不需要时关闭。
The context-exchange portlet can be displayed on-demand as an additional dynamic portlet and closed when not needed anymore.
当他访问向其提供必需信息的各种门户页面时,上下文相关的数据项将存储在上下文交换的Portlet中。
As he visits the various portal pages which provide him with necessary information, context-related data items are stored within the context-exchange portlet.
Bob可以收集和存储所有必需的信息,以便填写到上下文交换Portlet中的主表单(在目标页面上)。
Bob could collect and store all necessary information for feeding to the main form (on the target page) within the context-exchange portlet.
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