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comparison kernel/process.c3 @ 402:0fb6633c42f6

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Moved several files to logical locations
author Windel Bouwman
date Thu, 19 Feb 2015 00:13:07 +0100
parents kernel/src/process.c3@6ae782a085e0
children 9eb1fc6aad6c
comparison
equal deleted inserted replaced
401:994c00d55fd5 402:0fb6633c42f6
1 module process;
2
3 import memory;
4 import kernel;
5
6 // process type definition:
7 type struct {
8 int id;
9 int status;
10 process_t* next; // For linked list..
11 } process_t;
12
13 // Or, use this list structure:
14 // List<process_t> procs;
15
16 // init is the root of all processes:
17 var process_t* root_process;
18
19 var int next_pid;
20
21 function void init()
22 {
23 next_pid = 0;
24 root_process = create();
25 }
26
27 /*
28 Create a new process.
29 */
30 function process_t* create()
31 {
32 var process_t* p;
33
34 p = cast<process_t*>(memory.alloc(sizeof(process_t)));
35 p->id = next_pid;
36 p->status = 0; // Ready!
37 p->next = cast<process_t*>(0);
38
39 // Increment PID:
40 next_pid = next_pid + 1;
41
42 // Store it in the list:
43 if (root_process == cast<process_t*>(0))
44 {
45 root_process = p;
46 }
47 else
48 {
49 var process_t* parent;
50 parent = root_process;
51 while (parent->next != cast<process_t*>(0))
52 {
53 parent = parent->next;
54 }
55
56 parent->next = p;
57 }
58
59 return p;
60 }
61
62
63 function void Kill(process_t* p)
64 {
65 // clean memory
66 }
67
68 function process_t* byId(int id)
69 {
70 // Perform lookup
71 return 0;
72 }
73