The Linux Programming Interface: a linux and unix system Programming Handbook
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POSIX SHARED MEMORY 1107 54.1 Overview ............................................................................................................... 1108 54.2 Creating Shared Memory Objects ............................................................................. 1109 54.3 Using Shared Memory Objects ................................................................................. 1112 54.4 Removing Shared Memory Objects............................................................................ 1114 54.5 Comparisons Between Shared Memory APIs............................................................... 1115 54.6 Summary................................................................................................................ 1116 54.7 Exercise ................................................................................................................. 1116 55 FILE LOCKING 1117 55.1 Overview ............................................................................................................... 1117 55.2 File Locking with flock() ............................................................................................ 1119 55.2.1 Semantics of Lock Inheritance and Release............................................. 1122 55.2.2 Limitations of flock() ............................................................................ 1123 xxvi Contents in Detail 55.3 Record Locking with fcntl() ....................................................................................... 1124 55.3.1 Deadlock ........................................................................................... 1128 55.3.2 Example: An Interactive Locking Program............................................... 1129 55.3.3 Example: A Library of Locking Functions ................................................ 1133 55.3.4 Lock Limits and Performance................................................................. 1135 55.3.5 Semantics of Lock Inheritance and Release............................................. 1136 55.3.6 Lock Starvation and Priority of Queued Lock Requests.............................. 1137 55.4 Mandatory Locking.................................................................................................. 1137 55.5 The /proc/locks File ................................................................................................ 1140 55.6 Running Just One Instance of a Program..................................................................... 1142 55.7 Older Locking Techniques ........................................................................................ 1144 55.8 Summary................................................................................................................ 1146 55.9 Exercises ................................................................................................................ 1147 tải về 6.93 Mb. Chia sẻ với bạn bè của bạn:
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