Asked to design a user process SP00LING request output and two output processes, and outputs a SP00LING service program. When users want to process requests output output range information, call the output service program, service program by the output information into the output shaft. Treatment to an output end of the flag, which means that the process of the second output file output end. Thereafter, the application of an output request block (name of the user to record the output of the process request, the information on the position of the output well, and length information to be outputted), the process waits SP00LING output. When SP00LING output process work, information requested under each process block records to be output, its actual output to a printer or monitor. Here, the user process and the output process SP00LING request output can be run concurrently.

.classpath
.project
Spooling.class
Spooling.java
pcb.class
pcb.java
reqblock.class
reqblock.java
workspace
.........\.metadata
.........\.........\.cache.properties
.........\.........\.config
.........\.........\.......\.install-log
.........\.........\.......\platform.cfg
.........\.........\.......\platform.cfg.metadata
.........\.........\.......\.....................\v2Config1372787686294.xml
.........\.........\.......\.....................\v2LocalSite.xml
.........\.........\.keyring
.........\.........\.plugins
.........\.........\........\org.eclipse.core.resources
.........\.........\........\..........................\.history
.........\.........\........\..........................\........\.index
.........\.........\........\..........................\.root
.........\.........\........\..........................\.....\1.tree
.........\.........\........\..........................\.safetable
.........\.........\........\..........................\..........\org.eclipse.core.resources
.........\.........\........\org.eclipse.debug.core
.........\.........\........\org.eclipse.debug.ui
.........\.........\........\org.eclipse.ui
.........\.........\........\..............\dialog_settings.xml
.........\.........\........\org.eclipse.ui.views
.........\.........\........\....................\dialog_settings.xml
.........\.........\........\org.eclipse.ui.workbench
.........\.........\........\........................\dialog_settings.xml
.........\.........\........\........................\pref_store.ini
.........\.........\........\........................\workbench.xml
.........\.........\.registry
.........\.........\version.ini

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