2 #include <netinet/tcp.h>
5 inline static int test_and_set(volatile unsigned int *addr) {
7 /* Note: the "xchg" instruction does not need a "lock" prefix */
8 __asm__ __volatile__("xchgl %0, %1"
9 : "=r"(oldval), "=m"(*(addr))
10 : "0"(1), "m"(*(addr)));
13 inline static void UnLock(volatile unsigned int *addr) {
15 /* Note: the "xchg" instruction does not need a "lock" prefix */
16 __asm__ __volatile__("xchgl %0, %1"
17 : "=r"(oldval), "=m"(*(addr))
18 : "0"(0), "m"(*(addr)));
21 # error need implementation of test_and_set
26 inline void Lock(volatile unsigned int *s) {
27 while(test_and_set(s)) {
39 sockPoolHashTable_t *createSockPool(sockPoolHashTable_t * sockhash, unsigned int size) {
40 if((sockhash = calloc(1, sizeof(sockPoolHashTable_t))) == NULL) {
41 printf("Calloc error at %s line %d\n", __FILE__, __LINE__);
45 socknode_t **nodelist;
46 if ((nodelist = calloc(size, sizeof(socknode_t *))) < 0) {
47 printf("Calloc error at %s line %d\n", __FILE__, __LINE__);
52 sockhash->table = nodelist;
53 sockhash->inuse = NULL;
54 sockhash->size = size;
60 int createNewSocket(unsigned int mid) {
63 if((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
64 printf("%s() Error: In creating socket at %s, %d\n", __func__, __FILE__, __LINE__);
67 setsockopt(sd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(flag));
68 struct sockaddr_in remoteAddr;
69 bzero(&remoteAddr, sizeof(remoteAddr));
70 remoteAddr.sin_family = AF_INET;
71 remoteAddr.sin_port = htons(LISTEN_PORT);
72 remoteAddr.sin_addr.s_addr = htonl(mid);
73 if(connect(sd, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0) {
74 printf("%s(): Error %d connecting to %s:%d\n", __func__, errno, inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
82 int getSockWithLock(sockPoolHashTable_t *sockhash, unsigned int mid) {
84 int key = mid%(sockhash->size);
87 Lock(&sockhash->mylock);
88 ptr=&sockhash->table[key];
91 if (mid == (*ptr)->mid) {
95 tmp->next=sockhash->inuse;
97 UnLock(&sockhash->mylock);
102 UnLock(&sockhash->mylock);
103 if((sd = createNewSocket(mid)) != -1) {
104 socknode_t *inusenode = calloc(1, sizeof(socknode_t));
105 insToListWithLock(sockhash, inusenode);
112 int getSock(sockPoolHashTable_t *sockhash, unsigned int mid) {
114 int key = mid%(sockhash->size);
117 ptr=&sockhash->table[key];
120 if (mid == (*ptr)->mid) {
121 socknode_t *tmp=*ptr;
124 tmp->next=sockhash->inuse;
130 if((sd = createNewSocket(mid)) != -1) {
131 socknode_t *inusenode = calloc(1, sizeof(socknode_t));
132 inusenode->next=sockhash->inuse;
133 sockhash->inuse=inusenode;
140 int getSock2(sockPoolHashTable_t *sockhash, unsigned int mid) {
142 int key = mid%(sockhash->size);
145 ptr=&sockhash->table[key];
148 if (mid == (*ptr)->mid) {
153 if((sd = createNewSocket(mid)) != -1) {
154 *ptr=calloc(1, sizeof(socknode_t));
164 void insToListWithLock(sockPoolHashTable_t *sockhash, socknode_t *inusenode) {
165 Lock(&sockhash->mylock);
166 inusenode->next = sockhash->inuse;
167 sockhash->inuse = inusenode;
168 UnLock(&sockhash->mylock);
171 void freeSock(sockPoolHashTable_t *sockhash, unsigned int mid, int sd) {
172 int key = mid%(sockhash->size);
173 socknode_t *ptr = sockhash->inuse;
174 sockhash->inuse = ptr->next;
177 ptr->next = sockhash->table[key];
178 sockhash->table[key] = ptr;
181 void freeSockWithLock(sockPoolHashTable_t *sockhash, unsigned int mid, int sd) {
182 int key = mid%(sockhash->size);
184 Lock(&sockhash->mylock);
185 ptr = sockhash->inuse;
186 sockhash->inuse = ptr->next;
189 ptr->next = sockhash->table[key];
190 sockhash->table[key] = ptr;
191 UnLock(&sockhash->mylock);
195 / ***************************************/
196 * Array Implementation for socket resuse
197 * ***************************************/
201 sock_pool_t *initSockPool(unsigned int *mid, int machines) {
202 sock_pool_t *sockpool;
203 num_machines = machines;
204 if ((sockpool = calloc(num_machines, sizeof(sock_pool_t))) < 0) {
205 printf("%s(), Calloc error at %s, line %d\n", __func__, __FILE__, __LINE__);
209 for (i = 0; i < num_machines; i++) {
210 if ((sockpool[i].sd = calloc(MAX_CONN_PER_MACHINE, sizeof(int))) < 0) {
211 printf("%s(), Calloc error at %s, line %d\n", __func__, __FILE__, __LINE__);
214 if ((sockpool[i].inuse = calloc(MAX_CONN_PER_MACHINE, sizeof(char))) < 0) {
215 printf("%s(), Calloc error at %s, line %d\n", __func__, __FILE__, __LINE__);
218 sockpool[i].mid = mid[i];
220 for(j = 0; j < MAX_CONN_PER_MACHINE; j++) {
221 sockpool[i].sd[j] = -1;
228 int getSock(sock_pool_t *sockpool, unsigned int mid) {
230 for (i = 0; i < num_machines; i++) {
231 if (sockpool[i].mid == mid) {
233 for (j = 0; j < MAX_CONN_PER_MACHINE; j++) {
234 if (sockpool[i].sd[j] != -1 && (sockpool[i].inuse[j] == 0)) {
235 sockpool[i].inuse[j] = 1;
236 return sockpool[i].sd[j];
238 if (sockpool[i].sd[j] == -1) {
241 if((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
242 printf("%s() Error: In creating socket at %s, %d\n", __func__, __FILE__, __LINE__);
245 struct sockaddr_in remoteAddr;
246 bzero(&remoteAddr, sizeof(remoteAddr));
247 remoteAddr.sin_family = AF_INET;
248 remoteAddr.sin_port = htons(LISTEN_PORT);
249 remoteAddr.sin_addr.s_addr = htonl(mid);
251 if(connect(sd, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0) {
252 printf("%s(): Error %d connecting to %s:%d\n", __func__, errno, inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
256 sockpool[i].sd[j] = sd;
257 sockpool[i].inuse[j] = 1;
258 return sockpool[i].sd[j];
261 printf("%s()->Error: Less number of MAX_CONN_PER_MACHINE\n", __func__);
265 printf("%s()-> Error: Machine id not found\n", __func__);
270 int freeSock(sock_pool_t *sockpool, int sd) {
272 for (i = 0; i < num_machines; i++) {
274 for (j = 0; j < MAX_CONN_PER_MACHINE; j++) {
275 if (sockpool[i].sd[j] == sd) {
276 sockpool[i].inuse[j] = 0;
281 printf("%s() Error: Illegal socket descriptor %d\n", __func__, sd);