client: マルチスレッド時、スレッド作成中に作成済みのスレッドが動き出さないようにロックする.

clients/client.c

@@ -32,6 +32,8 @@ int g_noverwrap;
 int g_resolve;
 long g_restimes[1000001];
 
+pthread_mutex_t g_mutex = PTHREAD_MUTEX_INITIALIZER;
+
 const char *host;
 const char *port;
 
@@ -94,6 +96,9 @@ void* do_connect(struct addrinfo *servinfo)
     socks = malloc(sizeof(int)*g_noverwrap);
     memset(socks, 0, sizeof(int)*g_noverwrap);
 
+    pthread_mutex_lock(&g_mutex);
+    pthread_mutex_unlock(&g_mutex);
+
     for (i = 0; i < g_nloop; ++i) {
         // loop through all the results and connect to the first we can
         clock_gettime(CLOCK_MONOTONIC, &t1);
@@ -245,6 +250,7 @@ int main(int argc, char *argv[])
         }
     }
 
+    pthread_mutex_lock(&g_mutex);
     {
         void* res;
         pthread_t *threads = malloc(sizeof(pthread_t)*nthread);
@@ -256,6 +262,8 @@ int main(int argc, char *argv[])
                 return 3;
             }
         }
+        pthread_mutex_unlock(&g_mutex);
+
         for (i = 0; i < nthread; ++i) {
             rv = pthread_join(threads[i], &res);
             if (rv == -1) {