apt-pkg/acquire-worker.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: acquire-worker.h,v 1.9 1999/01/20 05:11:25 jgg Exp $
   4 /* ######################################################################
   5
   6    Acquire Worker - Worker process manager
   7
   8    Each worker class is associated with exaclty one subprocess.
   9
  10    ##################################################################### */
  11                                                                         /*}}}*/
  12 #ifndef PKGLIB_ACQUIRE_WORKER_H
  13 #define PKGLIB_ACQUIRE_WORKER_H
  14
  15 #include <apt-pkg/acquire.h>
  16
  17 #ifdef __GNUG__
  18 #pragma interface "apt-pkg/acquire-worker.h"
  19 #endif
  20
  21 // Interfacing to the method process
  22 class pkgAcquire::Worker
  23 {
  24    friend pkgAcquire;
  25
  26    protected:
  27    friend Queue;
  28
  29    /* Linked list starting at a Queue and a linked list starting
  30       at Acquire */
  31    Worker *NextQueue;
  32    Worker *NextAcquire;
  33
  34    // The access association
  35    Queue *OwnerQ;
  36    pkgAcquireStatus *Log;
  37    MethodConfig *Config;
  38    string Access;
  39
  40    // This is the subprocess IPC setup
  41    pid_t Process;
  42    int InFd;
  43    int OutFd;
  44    bool InReady;
  45    bool OutReady;
  46
  47    // Various internal things
  48    bool Debug;
  49    vector<string> MessageQueue;
  50    string OutQueue;
  51
  52    // Private constructor helper
  53    void Construct();
  54
  55    // Message handling things
  56    bool ReadMessages();
  57    bool RunMessages();
  58    bool InFdReady();
  59    bool OutFdReady();
  60
  61    // The message handlers
  62    bool Capabilities(string Message);
  63    bool SendConfiguration();
  64    bool MediaChange(string Message);
  65
  66    bool MethodFailure();
  67    void ItemDone();
  68
  69    public:
  70
  71    // The curent method state
  72    pkgAcquire::Queue::QItem *CurrentItem;
  73    string Status;
  74    unsigned long CurrentSize;
  75    unsigned long TotalSize;
  76
  77    // Load the method and do the startup
  78    bool QueueItem(pkgAcquire::Queue::QItem *Item);
  79    bool Start();
  80    void Pulse();
  81
  82    Worker(Queue *OwnerQ,MethodConfig *Config,pkgAcquireStatus *Log);
  83    Worker(MethodConfig *Config);
  84    ~Worker();
  85 };
  86
  87 #endif