操作系统读者写者问题

#include <stdio.h>
#include <pthread.h>
#include <windows.h>
#include<process.h>
#include <semaphore.h>
#define N 50
#define wrNum 5 ///写者数目
#define reNum 5 ///读者数目
#define sleepTime  1000

/*
初始化
int sem_init (sem_t *sem, int pshared, unsigned int value);

**：
int sem_post(sem_t *sem);

等待：
int sem_wait(sem_t * sem);
*/



sem_t rmutex ,wmutex;
int readcount=0;

/////////////////////读者//////////////////////////////
void * reader(void *)
{
    while(1)
    {
          sem_wait(&rmutex);         ///p(rmutex)
          if(readcount==0)
          sem_wait(&wmutex);         ///p (wmutex)
          readcount++;
          sem_post(&rmutex);        ///V(rmutex)

           printf("read id%d coming!\n",pthread_self());
        printf("read!%d\n");
        printf("read id%d exit!\n",pthread_self());
        Sleep(sleepTime);
          sem_wait(&rmutex);         ///p (rmutex)
          readcount--;
          if(readcount==0) sem_post(&wmutex);
          sem_post(&rmutex);         ///V(rmutex)
          Sleep(sleepTime);
    }
}
void * writer(void *)
{
    while(1)
    {

        sem_wait(&wmutex);         ///p (wmutex)

        printf("write id%d coming!\n",pthread_self());
        printf("write!\n");
        printf("write id%d exit!\n",pthread_self());
         Sleep(sleepTime);
        sem_post(&wmutex);         ///V(wmutex)
        Sleep(sleepTime);
    }
}
int main()
{
      sem_init(&rmutex,0,1);
      sem_init(&wmutex,0,1);
    pthread_t threadPool[reNum+wrNum];
    int i;
    for(i = 0; i < wrNum; i++)
    {
        pthread_t temp;
        if(pthread_create(&temp, NULL, writer, NULL) == -1)
        {

            exit(1);
        }
        threadPool[i] = temp;
    }///创建写者


    for(i = 0; i < reNum; i++)
    {
        pthread_t temp;
        if(pthread_create(&temp, NULL, reader, NULL) == -1)
        {
            exit(1);
        }
        threadPool[i+wrNum] = temp;
    }///创建读者


    void * result;
    for(i = 0; i < wrNum+reNum; i++)
    {
        if(pthread_join(threadPool[i], &result) == -1)
        {
            exit(1);
        }
    }
    return 0;
}