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Commit | Line | Data |
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2c5db955 CP |
1 | /* hooks.c */ |
2 | ||
3 | #include "hooks.h" | |
4 | #include <assert.h> | |
5 | #include "../lib/array.h" | |
8dabf9c9 | 6 | #include <stdlib.h> |
2c5db955 CP |
7 | |
8 | array hooks[HOOKMAX]; | |
a451a113 | 9 | unsigned int hookqueuelength; |
2c5db955 CP |
10 | |
11 | void inithooks() { | |
12 | int i; | |
13 | ||
526e7c1d | 14 | hookqueuelength=0; |
2c5db955 CP |
15 | for (i=0;i<HOOKMAX;i++) { |
16 | array_init(&(hooks[i]),sizeof(HookCallback)); | |
17 | array_setlim1(&(hooks[i]),2); | |
18 | array_setlim2(&(hooks[i]),2); | |
19 | } | |
20 | } | |
21 | ||
22 | int registerhook(int hooknum, HookCallback callback) { | |
23 | int i; | |
24 | HookCallback *hcbs; | |
25 | ||
26 | if (hooknum>HOOKMAX) | |
27 | return 1; | |
28 | ||
29 | hcbs=(HookCallback *)(hooks[hooknum].content); | |
30 | for(i=0;i<hooks[hooknum].cursi;i++) | |
31 | if(hcbs[i]==callback) | |
32 | return 1; | |
33 | ||
8dabf9c9 | 34 | /* If there is a previously blanked slot, go in there */ |
35 | for(i=0;i<hooks[hooknum].cursi;i++) { | |
36 | if(hcbs[i]==NULL) { | |
37 | hcbs[i]=callback; | |
38 | return 0; | |
39 | } | |
40 | } | |
41 | ||
2c5db955 CP |
42 | i=array_getfreeslot(&hooks[hooknum]); |
43 | hcbs=(HookCallback *)(hooks[hooknum].content); | |
44 | hcbs[i]=callback; | |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
49 | int deregisterhook(int hooknum, HookCallback callback) { | |
50 | int i; | |
51 | HookCallback *hcbs; | |
52 | ||
53 | if (hooknum>HOOKMAX) | |
54 | return 1; | |
55 | ||
56 | hcbs=(HookCallback *)(hooks[hooknum].content); | |
57 | ||
58 | for(i=0;i<hooks[hooknum].cursi;i++) | |
59 | if(hcbs[i]==callback) { | |
8dabf9c9 | 60 | /* If there is an ongoing callback, don't actually delete from the |
61 | * array in case THIS hook is active */ | |
62 | if (hookqueuelength) { | |
63 | hcbs[i]=NULL; | |
64 | } else { | |
65 | array_delslot(&(hooks[hooknum]),i); | |
66 | } | |
2c5db955 CP |
67 | return 0; |
68 | } | |
69 | ||
70 | return 1; | |
71 | } | |
72 | ||
73 | void triggerhook(int hooknum, void *arg) { | |
74 | int i; | |
75 | HookCallback *hcbs; | |
76 | ||
77 | if (hooknum>HOOKMAX) | |
78 | return; | |
79 | ||
526e7c1d | 80 | hookqueuelength++; |
2c5db955 CP |
81 | hcbs=(HookCallback *)(hooks[hooknum].content); |
82 | for (i=0;i<hooks[hooknum].cursi;i++) { | |
8dabf9c9 | 83 | if (hcbs[i]) |
84 | (hcbs[i])(hooknum, arg); | |
2c5db955 | 85 | } |
526e7c1d P |
86 | hookqueuelength--; |
87 | ||
88 | if (!hookqueuelength && hooknum!=HOOK_CORE_ENDOFHOOKSQUEUE) | |
89 | triggerhook(HOOK_CORE_ENDOFHOOKSQUEUE, 0); | |
2c5db955 | 90 | } |