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Commit | Line | Data |
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1 | /* Allocators for chanstats */ | |
2 | ||
3 | #include "chanstats.h" | |
4 | ||
5 | #include <stdlib.h> | |
6 | ||
7 | #define ALLOCUNIT 100 | |
8 | ||
9 | static void *malloclist; | |
10 | static chanstats *freecs; | |
11 | ||
12 | void *cstsmalloc(size_t size) { | |
13 | void **mem; | |
14 | ||
15 | /* Get the memory we want, with an extra four bytes for our pointer */ | |
16 | mem=(void **)malloc(size+sizeof(void *)); | |
17 | ||
18 | /* Set the first word to point at the last chunk we got */ | |
19 | *mem=malloclist; | |
20 | ||
21 | /* Now set the "last chunk" pointer to the address of this one */ | |
22 | malloclist=(void *)mem; | |
23 | ||
24 | /* Return the rest of the memory to the caller */ | |
25 | return (void *)(mem+1); | |
26 | } | |
27 | ||
28 | void cstsfreeall() { | |
29 | void *vp,**vp2; | |
30 | ||
31 | vp=malloclist; | |
32 | ||
33 | while (vp!=NULL) { | |
34 | vp2=(void **)vp; | |
35 | vp=*vp2; | |
36 | free((void *)vp2); | |
37 | } | |
38 | } | |
39 | ||
40 | void initchanstatsalloc() { | |
41 | malloclist=NULL; | |
42 | freecs=NULL; | |
43 | } | |
44 | ||
45 | chanstats *getchanstats() { | |
46 | chanstats *csp; | |
47 | int i; | |
48 | ||
49 | if (freecs==NULL) { | |
50 | freecs=(chanstats *)cstsmalloc(ALLOCUNIT*sizeof(chanstats)); | |
51 | for(i=0;i<(ALLOCUNIT-1);i++) { | |
52 | freecs[i].index=(chanindex *)&(freecs[i+1]); | |
53 | } | |
54 | freecs[ALLOCUNIT-1].index=NULL; | |
55 | } | |
56 | ||
57 | csp=freecs; | |
58 | freecs=(chanstats *)csp->index; | |
59 | ||
60 | return csp; | |
61 | } | |
62 | ||
63 | void freechanstats(chanstats *csp) { | |
64 | csp->index=(chanindex *)freecs; | |
65 | freecs=csp; | |
66 | } |