Deadlock

CHAPTER 7 الفصل السابــــــــــــــــــع DEADLOCKS الجمــــــــــــــــــــــود

مقدمــــــــــــــــــــــــة ,[object Object],[object Object],[object Object],[object Object],[object Object]

مقدمــــــــــــــــــــــــة ,[object Object],[object Object],[object Object]

7.1 System Model ,[object Object],[object Object],[object Object],[object Object],[object Object]

7.1 System Model ,[object Object],[object Object],[object Object]

7.2 Deadlock Characterization وصف ( تمثيل ) الجمود ,[object Object],[object Object]

7.2 Deadlock Characterization 7.2.1 Necessary Conditions ,[object Object],[object Object],[object Object],[object Object],[object Object]

7.2 Deadlock Characterization 7.2.1 Necessary Conditions ,[object Object],[object Object]

7.2 Deadlock Characterization 7.2.1 Necessary Conditions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

7.2.2 Resource-Allocation Graph الرسم البياني للمصدر المخصص ( المحجوز ) ,[object Object],[object Object],[object Object],[object Object],[object Object]

7.2.2 Resource-Allocation Graph الرسم البياني للمصدر المخصص ( المحجوز ) ,[object Object],[object Object],[object Object],[object Object]

7.2.2 Resource-Allocation Graph الرسم البياني للمصدر المخصص ( المحجوز ) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

الرسم البياني للمصدر المخصص ( المحجوز ) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Figure 7.1: Resource-allocation graph R 1 R 3 P 1 P 2 P 3 R 2 R 4

Figure 7.2: Resource-allocation graph with a deadlock R 1 R 3 P 1 P 2 P 3 R 2 R 4

Resource-allocation graph with a cycle but no deadlock ,[object Object],[object Object],[object Object],[object Object],[object Object]

Figure 7.3: Resource-allocation graph with a cycle but no deadlock P 1 P 2 P 3 P 4 R 1 R 2

7.3 Methods for handling Deadlocks ,[object Object],[object Object],[object Object],[object Object],[object Object]

7.3 Methods for handling Deadlocks ,[object Object],[object Object],[object Object]

7.4 Deadlock Prevention ,[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.1 Mutual Exclusion ,[object Object],[object Object],[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.1 Mutual Exclusion ,[object Object],[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.2 Hold and Wait ,[object Object],[object Object]

7.4 Deadlock Prevention 7.4.2 Hold and Wait ,[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.2 Hold and Wait ,[object Object],[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.2 Hold and Wait ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.3 No Preemption ( حق الشفعة ) ,[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.3 No Preemption ( حق الشفعة ) ,[object Object],[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.3 No Preemption ( حق الشفعة ) ,[object Object],[object Object],[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.4 Circular Wait ,[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.4 Circular Wait ,[object Object],[object Object],[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.4 Circular Wait ,[object Object],[object Object],[object Object],[object Object]

7.4 Deadlock Prevention 7.4.4 Circular Wait ,[object Object],[object Object]

7.4 Deadlock Prevention 7.4.4 Circular Wait ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

7.5 Deadlock Avoidance ,[object Object],[object Object],[object Object]

7.5 Deadlock Avoidance ,[object Object],[object Object]

7.5 Deadlock Avoidance ,[object Object],[object Object],[object Object],[object Object]

7.5 Deadlock Avoidance 7.5.1 Safe State ,[object Object],[object Object],[object Object],[object Object]

7.5 Deadlock Avoidance 7.5.1 Safe State ,[object Object],[object Object],[object Object],Figure (7.4) Safe, Unsafe, and Deadlock state Spaces Unsafe Safe Deadlock

7.5 Deadlock Avoidance 7.5.1 Safe State ,[object Object],[object Object],[object Object]

7.5 Deadlock Avoidance 7.5.1 Safe State ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

7.5 Deadlock Avoidance 7.5.1 Safe State ,[object Object],Max. Needs Current Needs P0 10 5 P1 4 2 P2 9 2

7.5 Deadlock Avoidance 7.5.1 Safe State ,[object Object]

7.5 Deadlock Avoidance 7.5.1 Safe State ,[object Object],[object Object]

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Deadlock

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