typedefstruct{volatileint32_t cnt;/**< An internal counter value. */}rte_atomic32_t;rte_atomic32_t pkt_count;pkt_count.cnt +=......#include<pthread.h>#include<stdio.h>volatileint test=0;//pthread_rwlock_t rwlock = PTHREAD_RWLOCK_INITIALIZER;void* print_xs (void* used){//pthread_rwlock_wrlock(&rwlock); test=test+2;//pthread_rwlock_unlock(&rwlock); sleep(1);//pthread_rwlock_wrlock(&rwlock); test=test+3;//pthread_rwlock_unlock(&rwlock);}int main (){pthread_t thread_id[100];int data=0;int i=0;for(i=0; i<100; i++){ pthread_create (&(thread_id[i]), NULL, print_xs, NULL);}for(i=0; i<100; i++){ pthread_join(thread_id[i],NULL);} printf("%d\n",test);return-1;}原文：http://www.cnblogs.com/yml435/p/6485895.html