ceph/src/boost/libs/asio/doc/overview/async_op2.dot

   1 digraph g
   2 {
   3   graph
   4     [
   5       nodesep="0.2"
   6     ];
   7
   8   edge
   9     [
  10       fontname="Helvetica",
  11       fontsize=10,
  12       labelfontname="Helvetica",
  13       labelfontsize=10
  14     ];
  15
  16   node
  17     [
  18       fontname="Helvetica",
  19       fontsize=10,
  20       shape=box
  21     ];
  22
  23   edge
  24     [
  25       arrowhead="open"
  26     ]
  27
  28   // Program elements.
  29   {
  30     operating_system [ label="Operating System", shape=ellipse ];
  31     io_service [ label="io_service" ];
  32     io_object [ label="I/O Object\ne.g. socket" ];
  33     your_program [ label="Your Program" ];
  34     your_completion_handler [ label="Your Completion Handler" ];
  35   }
  36
  37   // Owning relationships.
  38   {
  39     edge [ arrowtail="diamond" ];
  40     your_program:e -> your_completion_handler:n;
  41     your_program:w -> io_object:nw;
  42     your_program:se -> io_service:ne;
  43   }
  44
  45   // Non-owning relationships;
  46   {
  47     io_object:sw -> io_service:w;
  48   }
  49
  50   // Visible actions.
  51   {
  52     edge [ style="dashed", color="#808080" ];
  53
  54     // Forward actions.
  55     {
  56       your_program:s -> io_service:n [ label="5" ];
  57     }
  58
  59     // Reverse actions.
  60     {
  61       edge [ arrowhead="none", arrowtail="open" ];
  62       io_service:s -> operating_system:n [ label="4" ];
  63       your_completion_handler:s -> io_service:e [ label="6" ];
  64     }
  65   }
  66
  67   // Invisible actions.
  68   {
  69     edge [ style="invis" ];
  70
  71     // Forward actions.
  72     {
  73       your_program:sw -> io_object:n [ label="1" ];
  74       io_object:s -> io_service:nw [ label="2" ];
  75       //io_service:s -> operating_system:n [ label="3" ];
  76     }
  77   }
  78 }