............................Figures


Figure 3-1 IPC Permissions Data Structure	49
Figure 3-2 IPC Permission Modes	51
Figure 3-3 Structure of a Message Queue	52
Figure 3-4 Message Queue Control Structure	53
Figure 3-5 Message Header Structure	53
Figure 3-6 Synopsis of `msgget`()	54
Figure 3-7 Sample Program to Illustrate `msgget`()	56
Figure 3-8 Synopsis of `msgctl`()	56
Figure 3-9 Sample Program to Illustrate `msgctl`()	61
Figure 3-10 Synopses of `msgsnd`() and `msgrcv`()	61
Figure 3-11 Sample Program to Illustrate `msgsnd`() and `msgrcv`()	67
Figure 3-12 Structure of a Semaphore	70
Figure 3-13 Synopsis of `semget`()	72
Figure 3-14 Sample Program to Illustrate `semget`()	74
Figure 3-15 Synopsis of `semctl`()	74
Figure 3-16 Sample Program to Illustrate `semctl`()	83


Figure 3-17 Synopsis of `semop`()	83
Figure 3-18 Sample Program to Illustrate `semop`()	88
Figure 3-19 Structure of a Shared Memory Segment	90
Figure 3-20 Synopsis of `shmget`()	92
Figure 3-21 Sample Program to Illustrate `shmget`()	94
Figure 3-22 Synopsis of `shmctl`()	94
Figure 3-23 Sample Program to Illustrate `shmctl`()	98
Figure 3-24 Synopses of `shmat`() and `shmdt`()	99
Figure 3-25 Sample Program to Illustrate `shmat`() and `shmdt`()	105
Figure 4-1 SunOS 5.x Process Scheduler	109
Figure 4-2 Process Priorities (Programmer's View)	112
Figure 4-3 Process State Transition Diagram	138
Figure 5-1 Traditional UNIX System Address-Space Layout	155
Figure 5-2 Address-Space Layout	156
Figure 6-1 Unbounded Priority Inversion	162
Figure 6-2 Application Response Time	165
Figure 6-3 Internal Dispatch Latency	166
Figure 6-4 Dispatch Priorities for Scheduling Classes	168
Figure 6-5 The Kernel Dispatch Queue	170
Figure 6-6 Controlling Timer Interrupts	203