Please enable JavaScript.

Coggle requires JavaScript to display documents.

Operating System Structures (Services (User Interface (Batch, Command line…

- - - - The PS os broken into layers
    - - Modularization of the kernel
    - - Loadable kernel modules
    - - Mac OS
      - Android
      - IOS
  - - - Error alerts
        
        Log file
        
        Core dump
    - - Monitoring and controlling resource usage
- - - - booting
        
        bootstrap loader
        
        comes in the form of
        
        ROM
        
        contains the data
        
        EPROM
        
        1 more item...
  - - - Process control
      - File management
      - Device management
      - Information maintenance
        
        Useful for debugging
      - Communications
        
        Allows communication
        
        Between users or processes
        
        via
        
        Daemons
        
        Shared memory pool
    - - Performed by the OS
      - Invoked by programmers
      - written mostly in C/C++
      - APIs
        
        Allow programmers to
        
        Use tools
        
        Know names
        
        Know parameters
        
        Can be passed by
        
        Value
        
        Reference
        
        the stack
        
        Obviate implementation
        
        C standard
        
        libc
        
        system-call interfaces
  - - - Interfaces to system calls
    - - Complex task management
    - - File management
      - status information
        
        Some OSs include
        
        registries
        
        give information
      - File modification
      - Programming-language support
      - Program load/execution
      - communications
      - background services
        
        These include
        
        Services
        
        which are constantly running
    - - Non-operative programs
        
        Text-editors
        
        browsers
- - - - what it's done
    - - how it's done
  - - - moving software from system
    - - Duplicate the funcitonality of a system on another
- - - - Shells
  - - - Icons
      - windows
      - gestures
  - - - Allows for
        
        Flexibility
        
        Power