void
child_main(int i, int listenfd, int addrlen)
{
int connfd;
void web_child(int);
socklen_t clilen;
struct sockaddr *cliaddr;
if ((cliaddr = malloc(addrlen)) == NULL) {
perror("malloc error");
exit(1);
}
printf("child %ld starting\n", (long) getpid());
for ( ; ; ) {
clilen = addrlen;
my_lock_wait();
if ((connfd = accept(listenfd, cliaddr, &clilen)) < 0) {
perror("accept error");
exit(1);
}
my_lock_release();
web_child(connfd); /* process the request */
if (close(connfd) == -1) {
perror("close error");
exit(1);
}
}
}
int main(int argc, char **argv)
{
int fd, zero = 0;
int *ptr;
pid_t pid;
struct stat buf;
if (argc != 2) {
perror("usage: incr2 <pathname>");
exit(1);
}
/* open file, initialize to 0, map into memory */
// stat() in <sys/stat.h>, check whether this is the first to open the file
if (stat(argv[1], &buf) == -1 && errno == ENOENT) {
/* first time, using O_CREAT */
if ((fd = open(argv[1], O_RDWR | O_CREAT, FILE_MODE)) < 0) {
perror("create failed");
exit(1);
}
if (write(fd, &zero, sizeof(int)) <0) {
perror("write failed");
exit(1);
}
} else if ((fd = open(argv[1], O_RDWR, FILE_MODE)) < 0) {
perror("open failed");
exit(1);
}
ptr = (int *)mmap(NULL, sizeof(int), PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (ptr == MAP_FAILED) {
perror("mmap failed");
exit(1);
}
/* create, initialize, and unlink file lock */
my_lock_init(fd);
setbuf(stdout, NULL); /* stdout is unbuffered */
my_lock_wait();
printf("pid %d: get lock\n", getpid());
sleep(5);
printf("pid %d: %d\n", getpid(), (*ptr)++);
my_lock_release();
close(fd);
unlink(argv[1]);
exit(0);
}
int
main(int argc, char **argv)
{
int i, j, fd, nchildren, nloops, nbytes;
pid_t pid;
ssize_t n;
char request[MAXLINE], reply[MAXN];
int count = 0;
if (argc != 6)
err_quit("usage: client <hostname or IPaddr> <port> <#children> "
"<#loops/child> <#bytes/request>");
nchildren = atoi(argv[3]);
nloops = atoi(argv[4]);
nbytes = atoi(argv[5]);
snprintf(request, sizeof(request), "%d\n", nbytes); /* newline at end */
my_lock_init(NULL);
for (i = 0; i < nchildren; i++) {
if ( (pid = Fork()) == 0) { /* child */
for (j = 0; j < nloops; j++) {
fd = Tcp_connect(argv[1], argv[2]);
/*printf("%d : %d\n", getpid(), j);
Write(fd, request, strlen(request));
if ( (n = Readn(fd, reply, nbytes)) != nbytes)
err_quit("server returned %d bytes", n);
Close(fd);*/ /* TIME_WAIT on client, not server */
}
my_lock_wait();
printf("child %d done\n", i);
my_lock_release();
sleep(10);
exit(0);
}
/* parent loops around to fork() again */
}
while (wait(NULL) > 0) /* now parent waits for all children */
;
if (errno != ECHILD)
err_sys("wait error");
printf("all child: %d\n", count);
exit(0);
}
void
child_main(int i, int listenfd, int addrlen)
{
int connfd;
void web_child(int);
socklen_t clilen;
struct sockaddr *cliaddr;
cliaddr = Malloc(addrlen);
printf("child %ld starting\n", (long) getpid());
for ( ; ; ) {
clilen = addrlen;
my_lock_wait();
connfd = Accept(listenfd, cliaddr, &clilen);
my_lock_release();
web_child(connfd); /* process the request */
Close(connfd);
}
}
void child_main(int fd,socklen_t addrlen)
{
socklen_t clilen;
struct sockaddr *cliaddr;
int connfd;
cliaddr = malloc(addrlen);
for(;;)
{
clilen = addrlen;
my_lock_wait();
if((connfd = accept(listenfd,cliaddr,&clilen)) < 0)
{
if(errno = EINTR)
continue;
else
err_quit("accept error!");
}
my_lock_release();
web_child(connfd);
}
}
void
child_main(int i, int listenfd, int addrlen)
{
int connfd, epollfd, n, nfds, nconn = 1;
socklen_t clilen;
struct sockaddr *cliaddr;
struct epoll_event ev, events[MAX_EVENTS];
pthread_t tid;
cliaddr = Malloc(addrlen);
setnonblocking(listenfd);
epollfd = epoll_create(MAX_EVENTS);
if (-1 == epollfd)
err_sys("epoll_create");
ev.events = EPOLLIN;
ev.data.fd = listenfd;
if (-1 == epoll_ctl(epollfd, EPOLL_CTL_ADD, listenfd, &ev))
err_sys("epoll_ctr");
printf("child %ld starting\n", (long) getpid());
clilen = addrlen;
/*if (0 != pthread_create(&tid, NULL, child_thread, &epollfd))
err_sys("pthread_create");*/
for ( ; ; ) {
nfds = epoll_wait(epollfd, events, MAX_EVENTS, -1);
printf("nfds = %d, connections = %d\n", nfds, nconn);
if (-1 == nfds)
err_sys("epoll_wait");
for (n = 0; n < nfds; n++)
{
if (events[n].data.fd == listenfd && nconn <= MAX_EVENTS)
{
if (my_lock_wait())
continue;
connfd = accept(listenfd, cliaddr, &clilen);
if (connfd == -1)
{
my_lock_release();
continue;
}
my_lock_release();
printf("%d:recevice one request\n", getpid());
nconn++;
setnonblocking(connfd);
ev.events = EPOLLIN;
ev.data.fd = connfd;
if (-1 == epoll_ctl(epollfd, EPOLL_CTL_ADD, connfd, &ev))
err_sys("epoll_ctl");
}
else
{
if (events[n].data.fd < 0)
continue;
web_child(events[n].data.fd);
if (-1 == epoll_ctl(epollfd, EPOLL_CTL_DEL, events[n].data.fd, NULL))
err_sys("epoll_ctl");
Close(events[n].data.fd);
nconn--;
}
}
}
}
int main(int argc, char **argv)
{
int fd, i, num_loop, zero = 0;
char c, lock_f[128];
struct stat st;
int *iptr;
char *cptr;
if(argc != 4) {
printf("usage: %s <pathname> <loop number> <char>\n", argv[0]);
exit(EXIT_FAILURE);
}
if(is_int(argv[2]))
num_loop = atoi(argv[2]);
c = argv[3][0];
i = stat(argv[1], &st); /* first one will get -1*/
snprintf(lock_f, sizeof(lock_f), "%s.lock", argv[1]);
if((fd = open(argv[1], O_RDWR | O_CREAT, F_MODE)) < 0) {
perror("open() failed\n");
exit(EXIT_FAILURE);
}
if(i == -1) { /* initialze */
write(fd, &zero, sizeof(int)); /* int counter*/
for(i = 0; i < SIZE; i++) {
write(fd, &zero, 1);
}
}
iptr = (int *)mmap(NULL, SIZE+sizeof(int), PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if(iptr == MAP_FAILED) {
perror("mmap failed\n");
exit(EXIT_FAILURE);
}
close(fd); /* POSIX recommendation */
cptr = (char *)(&iptr[1]);
my_lock_init(lock_f);
setbuf(stdout, NULL); /* stdout unbuffer */
for(i = 0; i < num_loop; i++) {
my_lock_wait();
if(*iptr >= (SIZE-1)) {
my_lock_release();
exit(EXIT_SUCCESS);
}
//
for ( ; ; ) {
if ((cptr[*iptr - 1]) == c && *iptr != 0) {
my_lock_release();
usleep(100);
my_lock_wait();
} else {
break;
}
}
cptr[*iptr] = c;
printf("%c: %d\n", c, (*iptr)++);
my_lock_release();
// usleep(800000);
}
return 0;
}