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comparison TaskManager/kernel/ppe/MailManager.cc @ 50:7927e00fb8e2

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*** empty log message ***
author gongo
date Fri, 15 Feb 2008 19:36:08 +0900
parents
children 72dcf908ec52
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49:64ef030deb22 50:7927e00fb8e2
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include "MailManager.h"
4
5 MailManager::MailManager(void)
6 :mailQueuePool(NULL), freeMailQueue(NULL) {}
7
8 MailManager::~MailManager(void) { destroy(); }
9
10 int
11 MailManager::init(int num)
12 {
13 if (!mailQueuePool) {
14 return extend_pool(num);
15 }
16 return 0;
17 }
18
19 int
20 MailManager::extend_pool(int num)
21 {
22 MailQueuePtr q;
23
24 q = (MailQueuePtr)malloc(sizeof(MailQueue)*(num+1));
25
26 if (q == NULL) {
27 return -1;
28 }
29 q->next = mailQueuePool;
30 mailQueuePool = q;
31
32 /* Connect all free queue in the pool */
33 for (q = mailQueuePool + 1; --num > 0; q++) {
34 q->next = q + 1;
35 }
36 q->next = freeMailQueue;
37 freeMailQueue = mailQueuePool + 1;
38
39 return 0;
40 }
41
42 MailQueuePtr
43 MailManager::create(unsigned int data)
44 {
45 MailQueuePtr q;
46
47 if (!freeMailQueue) {
48 extend_pool(30);
49 }
50 q = freeMailQueue;
51 freeMailQueue = freeMailQueue->next;
52
53 q->data = data;
54 q->next = NULL;
55
56 return q;
57 }
58
59 void
60 MailManager::free(MailQueuePtr q)
61 {
62 q->next = freeMailQueue;
63 freeMailQueue = q;
64 }
65
66
67 void
68 MailManager::destroy(void)
69 {
70 MailQueuePtr q;
71
72 for (q = mailQueuePool; q; q = q->next) {
73 free(q);
74 }
75 freeMailQueue = mailQueuePool = NULL;
76 }
77
78
79 MailQueuePtr
80 MailManager::append_mailQueue(MailQueuePtr list, MailQueuePtr q)
81 {
82 MailQueuePtr p = list;
83
84 if (p == NULL) {
85 return q;
86 } else {
87 while(p->next) p = p->next;
88 p->next = q;
89 return list;
90 }
91 }