all repos — kuro @ 6fa747864efcb84863d09a9a937315e748a9f040

multiwindow text editor thing for plan9 with simple client VM and 9p interface

node.c (raw)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
 
#include "dat.h"
#include "fns.h"


void node_setup(Node* self, uvlong id, int fd, Handler* handlers, KuroMemory* memory) {
  if (self) {
    self->id = id;
    self->fd = fd;
    self->handlers = handlers;
    self->memory = memory;
    self->cpu = chancreate(sizeof(Instruction), 0);
    self->status = chancreate(sizeof(WindowStatus), 0);
  }
}
void node_loop(void* data) {
  Node* self = (Node*)data;
  Instruction x;

  for (;;) {
    recv(self->cpu, &x);
    if (self->handlers[x.opcode]) {
      (*(self->handlers[x.opcode]))(self, x.data);
      switch(self->memory->status) {
        case KURO_QUITS:
		  nbsend(self->status, 0);
          threadexits(0);
        default:
          break;
      }
      flushimage(self->memory->screen->display, 1);
    }
  }
}

void node_execute(Node* self) {
  threadcreate(node_loop, self, 1024);
}

Node* create_node(uvlong id, int fd, int new, char* filename) {

  if (new) {
    newwindow("-dx 600 -dy 600");
  }
  initdraw(nil, nil, "kuro");

  KuroMemory* self = (KuroMemory*)malloc(sizeof(KuroMemory));
  Node* node = (Node*)malloc(sizeof(Node));
  Handler* handlers = (Handler*)malloc(TOTAL_OPCODES * sizeof(Handler*));

  node_setup(node, id, fd, handlers, self);

  self->img = screen;
  self->screen = _screen;

  strcpy(self->filepath, filename);

  /* node_execute runs the node on a separate thread */
  node_execute(node);

  return node;
}

void supervise_node(Node* self) {

  Mousectl* mctl;
  Keyboardctl* kctl;
  Mouse mouse;
  int resize[2];
  WindowStatus status;
  Rune kbd;

  if ((mctl = initmouse(nil, screen)) == nil) {
    sysfatal("couldn't initialize mctl");
  }
  if ((kctl = initkeyboard(nil)) == nil) {
    sysfatal("couldn't initialize kctl");
  }

  Alt alts[TOTAL_PORTS + 1] = {
    {mctl->c, &mouse, CHANRCV},
    {mctl->resizec, resize, CHANRCV},
    {kctl->c, &kbd, CHANRCV},
    {self->status, &status, CHANRCV},
    {nil, nil, CHANEND}
  };

  for (;;) {
    switch (alt(alts)) {
      case PORT_MOUSE:
        print("got a mouse event");
        break;
      case PORT_RESIZE:
        lockdisplay(display);
        if (getwindow(display, Refnone) < 0)
          sysfatal("couldn't resize");
        unlockdisplay(display);
        print("got a resize event");
        break;
      case PORT_KBD:
        print("got a keypress");
        break;
      case PORT_STATUS:
        switch(status) {
          case KURO_QUITS:
            print("VM died - let's clean up the data");
            goto cleanup;
          default:
            break;
        }
        break;
    }
  }
cleanup:
  node_cleanup(self);
}

void node_cleanup(Node* self) {
  if (self) {
    memory_cleanup(self->memory);
    chanfree(self->cpu);
    chanfree(self->status);
    /* TODO: send message on self->fd to tell the server to remove us from NodeTable and filetree */
    /* handlers array is shared between all the nodes */
    free(self);
  }
}

void memory_cleanup(KuroMemory* self) {
  if (self) {
    /* do we need to free the img and screen? */
  }
}