●●● ●●●● 6.2 The Critical-Section Problem :: ●●●● ° Critica| section ●●●● The n processes compete to use some shared data(临界资源) o Changing common variables o updating a table writing a file o Each process has a code segment, called critical section, in which the shared data is accessed10 6.2 The Critical-Section Problem ⚫ Critical section ⚫ The n processes compete to use some shared data （临界资源） ⚫ Changing common variables ⚫ updating a table ⚫ writing a file ⚫ Each process has a code segment, called critical section, in which the shared data is accessed