多线程实现奇偶统计v1

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "pthread.h"
#define BUFFER_SIZE 1600
#define OVER (110000)
/* 设置一个整数的圆形缓冲区 */
struct prodcons {
    int buffer[BUFFER_SIZE]; /* 缓冲区数组 */
    pthread_mutex_t lock; /* 互斥锁 */
    int readpos, writepos; /* 读写的位置*/
    int ji, ou, zheng, fu, zero;    //奇数、偶数、正数、负数，零的个数
    pthread_cond_t readable; /* 缓冲区非空信号 */
    pthread_cond_t writeable; /*缓冲区非满信号 */
};
/*--------------------------------------------------------*/
/*初始化缓冲区*/
void init(struct prodcons * b)
{
    pthread_mutex_init(&b->lock, NULL);
    pthread_cond_init(&b->readable, NULL);
    pthread_cond_init(&b->writeable, NULL);
    b->readpos = 0;
    b->writepos = 0;
    b->ji=0;
    b->ou=0;
    b->zheng=0;
    b->fu=0;
    b->zero=0;
}
/*--------------------------------------------------------*/
/* 向缓冲区中写入一个整数*/
void put(struct prodcons * b, int data)
{
    pthread_mutex_lock(&b->lock);
    /*等待缓冲区非满*/
    //写的话，我就不等了
//    while ((b->writepos + 1) % BUFFER_SIZE == b->readpos) {
//    while (b->writepos  == b->readpos) {
//        printf("wait for not write able
");
//        pthread_cond_wait(&b->writeable, &b->lock);
//    }
    /*写数据并且指针前移*/
    b->buffer[b->writepos] = data;
    b->writepos++;
//    if (b->writepos >= BUFFER_SIZE) b->writepos = 0;
    /*设置缓冲区非空信号*/
    if (b->writepos  > b->readpos) 
        pthread_cond_signal(&b->readable);
    pthread_mutex_unlock(&b->lock);
}
/*--------------------------------------------------------*/
/*从缓冲区中读出一个整数 */
int get(struct prodcons * b)
{
    int data;
    pthread_mutex_lock(&b->lock);
    /* 等待缓冲区非空*/
    while (b->writepos <= b->readpos) {
        printf("wait for new data
");
        pthread_cond_wait(&b->readable, &b->lock);
    }
    /* 读数据并且指针前移 */
    data = b->buffer[b->readpos];
    b->readpos++;
    //统计
    if(data!=OVER){
        if(data%2==0)    b->ou++;
        else    b->ji++;
        if(data==0)    b->zero++;
        else if(data>0)    b->zheng++;
        else    b->fu++;
    }
//    if (b->readpos >= BUFFER_SIZE) b->readpos = 0;
    /* 设置缓冲区非满信号*/
//    pthread_cond_signal(&b->writeable);
    pthread_mutex_unlock(&b->lock);
    return data;
}
/*--------------------------------------------------------*/
struct prodcons buffer;
/*--------------------------------------------------------*/
void * producer(void * data)
{
    int n;
    int m;
    srand(time(0));
    for (n = 0; n < 1000; n++) {
//        srand(time(0));
    //    m=(rand()*1000)%1000;
        m=(rand())%1000-500;
        printf(" wirte-->%d
", m);
        put(&buffer, m);
    }
    put(&buffer, OVER);
    printf("producer stopped!
");
    return NULL;
}
/*--------------------------------------------------------*/
void * consumer(void * data)
{
    int d;
    while (1) {
        d = get(&buffer);
        if (d == OVER ) break;
        printf(" %d-->read
", d);
    }
    printf("consumer stopped!
");
    return NULL;
}
/*--------------------------------------------------------*/
int main(void)
{
    pthread_t th_a, th_b;
    void * retval;
    init(&buffer);
    pthread_create(&th_a, NULL, producer, 0);
    pthread_create(&th_b, NULL, consumer, 0);
    /* 等待生产者和消费者结束 */
    pthread_join(th_a, &retval);
    pthread_join(th_b, &retval);
    printf("奇数个数：%d
",buffer.ji);
    printf("偶数个数：%d
",buffer.ou);
    printf("正数个数：%d
",buffer.zheng);
    printf("负数个数：%d
",buffer.fu);
    printf("零的个数：%d
",buffer.zero);
    return 0;
}