Create threads in a detached state.

[jam] / jam.c

diff --git a/jam.c b/jam.c
index 3b38d0217587f00d08e319eee7a1f5191f190599..80737a758de8f082aa74bcb51a58c20a75625ee1 100644 (file)
--- a/jam.c
+++ b/jam.c
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <math.h>
 #include <string.h>
 #include <stdlib.h>
 #include <getopt.h>
@@ -28,6 +29,18 @@ const static struct option longopts[] = {
        { NULL, 0, NULL, 0 }
 };
 
+// generates from [0,1>
+double gen_uniform_random()
+{
+       return rand() / (RAND_MAX+1.0);
+}
+
+double gen_pareto_random(double min, double k)
+{
+       double u = gen_uniform_random();
+       return min * pow(u, -1.0 / k);
+}
+
 void read_ip_list(char *filename, struct in_addr **addr_list, unsigned *num, unsigned *room)
 {
        char buf[256];
@@ -113,7 +126,41 @@ void parse_options(int argc, char **argv)
 
 void *sender_worker(void *arg)
 {
-       printf("Dummy sender worker\n");
+       unsigned i;
+       int sock;
+
+       for (i = 0; i < 1000; ++i) {
+               unsigned src_num = (unsigned)(num_sources * gen_uniform_random());
+               unsigned dst_num = (unsigned)(num_destinations * gen_uniform_random());
+               unsigned num_bytes = (unsigned)gen_pareto_random(1048576.0, 1.0);
+               struct sockaddr_in sin;
+
+               sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
+               if (sock == -1) {
+                       perror("socket()");
+                       exit(1);
+               }
+               
+               // FIXME: bind to the right source
+               
+               sin.sin_family = AF_INET;
+               sin.sin_port = htons(port);
+               sin.sin_addr = destinations[dst_num];
+       
+               fprintf(stderr, "connecting %u\n", i);
+
+               if (connect(sock, (struct sockaddr *)&sin, sizeof(sin)) == -1) {
+                       perror("connect()");
+                       exit(1);
+               }
+               
+               fprintf(stderr, "connected\n");
+
+               // FIXME: send data here
+
+               close(sock);
+       }
+
        pthread_exit(0);
 }
 
@@ -122,8 +169,6 @@ void *receiver_worker(void *arg)
        int sock = (int)arg;
        char buf[65536];
 
-       printf("Received worker for socket %u\n", sock);
-
        for ( ;; ) {
                int ret = read(sock, buf, 65536);
                if (ret == 0)
@@ -131,8 +176,6 @@ void *receiver_worker(void *arg)
 
                // FIXME: update stats here
        }
-
-       printf("Socket %u done\n", sock);
        
        if (close(sock) == -1) {
                perror("close()");
@@ -204,6 +247,11 @@ int main(int argc, char **argv)
                exit(1);
        }
 
+       if (pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) != 0) {
+               perror("pthread_attr_setdetachstate");
+               exit(1);
+       }
+
        // Fire off sender workers.
        for (i = 0; i < num_senders; ++i) {
                pthread_t thread;