cinelerra/loadbalance.h

   1 #ifndef LOADBALANCE_H
   2 #define LOADBALANCE_H
   3
   4 #include "condition.inc"
   5 #include "mutex.inc"
   6 #include "thread.h"
   7
   8
   9
  10
  11 // Load balancing utils
  12 // There is no guarantee that all the load clients will be run in a
  13 // processing operation.
  14
  15
  16 class LoadServer;
  17
  18
  19
  20 class LoadPackage
  21 {
  22 public:
  23         LoadPackage();
  24         virtual ~LoadPackage();
  25
  26         Condition *completion_lock;
  27 // Range to search in the total scan area
  28 //      int pixel1, pixel2;
  29 };
  30
  31
  32 class LoadClient : public Thread
  33 {
  34 public:
  35         LoadClient(LoadServer *server);
  36         LoadClient();
  37         virtual ~LoadClient();
  38
  39 // Called when run as distributed client
  40         void run();
  41 // Called when run as a single_client
  42         void run_single();
  43         virtual void process_package(LoadPackage *package);
  44         int get_package_number();
  45         LoadServer* get_server();
  46
  47         int done;
  48         int package_number;
  49         Condition *input_lock;
  50         Condition *completion_lock;
  51         LoadServer *server;
  52 };
  53
  54
  55
  56
  57 class LoadServer
  58 {
  59 public:
  60         LoadServer(int total_clients, int total_packages);
  61         virtual ~LoadServer();
  62
  63         friend class LoadClient;
  64
  65 // Called first in process_packages.  Should also initialize clients.
  66         virtual void init_packages() {};
  67         virtual LoadClient* new_client() { return 0; };
  68         virtual LoadPackage* new_package() { return 0; };
  69
  70 // User calls this to do an iteration with the distributed clients
  71         void process_packages();
  72
  73 // Use this to do an iteration with one client, in the current thread.
  74 // The single client is created specifically for this call and deleted in
  75 // delete_clients.  This simplifies the porting to OpenGL.
  76 // total_packages must be > 0.
  77         void process_single();
  78
  79 // These values are computed from the value of is_single.
  80         int get_total_packages();
  81         int get_total_clients();
  82         LoadPackage* get_package(int number);
  83         LoadClient* get_client(int number);
  84         void set_package_count(int total_packages);
  85
  86
  87
  88         void delete_clients();
  89         void create_clients();
  90         void delete_packages();
  91         void create_packages();
  92
  93
  94
  95
  96 private:
  97         int current_package;
  98         LoadPackage **packages;
  99         int total_packages;
 100         LoadClient **clients;
 101         LoadClient *single_client;
 102         int total_clients;
 103         int is_single;
 104         Mutex *client_lock;
 105 };
 106
 107
 108
 109 #endif
 110
 111
 112 /*
 113 //      Local Variables:
 114 //      mode: C++
 115 //      c-file-style: "linux"
 116 //      End:
 117 */