2 #include <netinet/tcp.h>
5 inline 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 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)) {
38 sockPoolHashTable_t *createSockPool(sockPoolHashTable_t * sockhash, unsigned int size) {
39 if((sockhash = calloc(1, sizeof(sockPoolHashTable_t))) == NULL) {
40 printf("Calloc error at %s line %d\n", __FILE__, __LINE__);
44 socknode_t **nodelist;
45 if ((nodelist = calloc(size, sizeof(socknode_t *))) < 0) {
46 printf("Calloc error at %s line %d\n", __FILE__, __LINE__);
51 sockhash->table = nodelist;
52 sockhash->inuse = NULL;
53 sockhash->size = size;
59 int createNewSocket(unsigned int mid) {
62 if((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
63 printf("%s() Error: In creating socket at %s, %d\n", __func__, __FILE__, __LINE__);
66 setsockopt(sd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(flag));
67 struct sockaddr_in remoteAddr;
68 bzero(&remoteAddr, sizeof(remoteAddr));
69 remoteAddr.sin_family = AF_INET;
70 remoteAddr.sin_port = htons(LISTEN_PORT);
71 remoteAddr.sin_addr.s_addr = htonl(mid);
72 if(connect(sd, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0) {
73 printf("%s(): Error %d connecting to %s:%d\n", __func__, errno, inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
80 int getSockWithLock(sockPoolHashTable_t *sockhash, unsigned int mid) {
82 int key = mid%(sockhash->size);
85 Lock(&sockhash->mylock);
86 ptr=&(sockhash->table[key]);
89 if (mid == (*ptr)->mid) {
93 tmp->next=sockhash->inuse;
95 UnLock(&sockhash->mylock);
100 UnLock(&sockhash->mylock);
101 if((sd = createNewSocket(mid)) != -1) {
102 socknode_t *inusenode = calloc(1, sizeof(socknode_t));
103 insToListWithLock(sockhash, inusenode);
110 int getSock(sockPoolHashTable_t *sockhash, unsigned int mid) {
112 int key = mid%(sockhash->size);
115 ptr=&(sockhash->table[key]);
118 if (mid == (*ptr)->mid) {
119 socknode_t *tmp=*ptr;
122 tmp->next=sockhash->inuse;
128 if((sd = createNewSocket(mid)) != -1) {
129 socknode_t *inusenode = calloc(1, sizeof(socknode_t));
130 inusenode->next=sockhash->inuse;
131 sockhash->inuse=inusenode;
138 int getSock2(sockPoolHashTable_t *sockhash, unsigned int mid) {
140 int key = mid%(sockhash->size);
143 ptr=&(sockhash->table[key]);
146 if (mid == (*ptr)->mid) {
151 if((sd = createNewSocket(mid)) != -1) {
152 *ptr=calloc(1, sizeof(socknode_t));
161 void insToListWithLock(sockPoolHashTable_t *sockhash, socknode_t *inusenode) {
162 Lock(&sockhash->mylock);
163 inusenode->next = sockhash->inuse;
164 sockhash->inuse = inusenode;
165 UnLock(&sockhash->mylock);
168 void freeSock(sockPoolHashTable_t *sockhash, unsigned int mid, int sd) {
169 int key = mid%(sockhash->size);
170 socknode_t *ptr = sockhash->inuse;
171 sockhash->inuse = ptr->next;
174 ptr->next = sockhash->table[key];
175 sockhash->table[key] = ptr;
178 void freeSockWithLock(sockPoolHashTable_t *sockhash, unsigned int mid, int sd) {
179 int key = mid%(sockhash->size);
181 Lock(&sockhash->mylock);
182 ptr = sockhash->inuse;
183 sockhash->inuse = ptr->next;
186 ptr->next = sockhash->table[key];
187 sockhash->table[key] = ptr;
188 UnLock(&sockhash->mylock);
192 / ***************************************/
193 * Array Implementation for socket resuse
194 * ***************************************/
198 sock_pool_t *initSockPool(unsigned int *mid, int machines) {
199 sock_pool_t *sockpool;
200 num_machines = machines;
201 if ((sockpool = calloc(num_machines, sizeof(sock_pool_t))) < 0) {
202 printf("%s(), Calloc error at %s, line %d\n", __func__, __FILE__, __LINE__);
206 for (i = 0; i < num_machines; i++) {
207 if ((sockpool[i].sd = calloc(MAX_CONN_PER_MACHINE, sizeof(int))) < 0) {
208 printf("%s(), Calloc error at %s, line %d\n", __func__, __FILE__, __LINE__);
211 if ((sockpool[i].inuse = calloc(MAX_CONN_PER_MACHINE, sizeof(char))) < 0) {
212 printf("%s(), Calloc error at %s, line %d\n", __func__, __FILE__, __LINE__);
215 sockpool[i].mid = mid[i];
217 for(j = 0; j < MAX_CONN_PER_MACHINE; j++) {
218 sockpool[i].sd[j] = -1;
225 int getSock(sock_pool_t *sockpool, unsigned int mid) {
227 for (i = 0; i < num_machines; i++) {
228 if (sockpool[i].mid == mid) {
230 for (j = 0; j < MAX_CONN_PER_MACHINE; j++) {
231 if (sockpool[i].sd[j] != -1 && (sockpool[i].inuse[j] == 0)) {
232 sockpool[i].inuse[j] = 1;
233 return sockpool[i].sd[j];
235 if (sockpool[i].sd[j] == -1) {
238 if((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
239 printf("%s() Error: In creating socket at %s, %d\n", __func__, __FILE__, __LINE__);
242 struct sockaddr_in remoteAddr;
243 bzero(&remoteAddr, sizeof(remoteAddr));
244 remoteAddr.sin_family = AF_INET;
245 remoteAddr.sin_port = htons(LISTEN_PORT);
246 remoteAddr.sin_addr.s_addr = htonl(mid);
248 if(connect(sd, (struct sockaddr *)&remoteAddr, sizeof(remoteAddr)) < 0) {
249 printf("%s(): Error %d connecting to %s:%d\n", __func__, errno, inet_ntoa(remoteAddr.sin_addr), LISTEN_PORT);
253 sockpool[i].sd[j] = sd;
254 sockpool[i].inuse[j] = 1;
255 return sockpool[i].sd[j];
258 printf("%s()->Error: Less number of MAX_CONN_PER_MACHINE\n", __func__);
262 printf("%s()-> Error: Machine id not found\n", __func__);
267 int freeSock(sock_pool_t *sockpool, int sd) {
269 for (i = 0; i < num_machines; i++) {
271 for (j = 0; j < MAX_CONN_PER_MACHINE; j++) {
272 if (sockpool[i].sd[j] == sd) {
273 sockpool[i].inuse[j] = 0;
278 printf("%s() Error: Illegal socket descriptor %d\n", __func__, sd);