1   /* 
    2    * echoservert.c - A concurrent echo server using threads
    3    */
    4   /* $begin echoservertmain */
    5   #include "csapp.h"
    6   
    7   void echo(int connfd);
    8   void *thread(void *vargp);
    9   
   10   int main(int argc, char **argv) 
   11   {
   12       int listenfd, *connfdp, port;
   13       socklen_t clientlen=sizeof(struct sockaddr_in);
   14       struct sockaddr_in clientaddr;
   15       pthread_t tid; 
   16   
   17       if (argc != 2) {
   18           fprintf(stderr, "usage: %s <port>\n", argv[0]);
   19           exit(0);
   20       }
   21       port = atoi(argv[1]);
   22   
   23       listenfd = Open_listenfd(port);
   24       while (1) {
   25           connfdp = Malloc(sizeof(int)); //line:conc:echoservert:beginmalloc
   26           *connfdp = Accept(listenfd, (SA *) &clientaddr, &clientlen); //line:conc:echoservert:endmalloc
   27           Pthread_create(&tid, NULL, thread, connfdp);
   28       }
   29   }
   30   
   31   /* thread routine */
   32   void *thread(void *vargp) 
   33   {  
   34       int connfd = *((int *)vargp);
   35       Pthread_detach(pthread_self()); //line:conc:echoservert:detach
   36       Free(vargp);                    //line:conc:echoservert:free
   37       echo(connfd);
   38       Close(connfd);
   39       return NULL;
   40   }
   41   /* $end echoservertmain */