c tool系列------用poll函数查询IMEI

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#include "tthelp.h"
#include "SIMTest.h"
#include<pthread.h>
#include<unistd.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/poll.h>

#define CMD_READ_IMEI            "AT+CGSN\r"

#define Send_cmd_success           5

   pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
   pthread_cond_t cond = PTHREAD_COND_INITIALIZER; //init cond
   pthread_cond_t cond1 = PTHREAD_COND_INITIALIZER; //init cond
   static int sync1=0;
   static int success=0;

void write_data_fun1 (void ){


sleep(3);

//********************************************************

   pthread_mutex_lock(&mutex);
        write_at_cgsn (g_fd,CMD_SWITCH_SIM_CARD_STATUS);
       printf("-----1\n");
   pthread_cond_wait(&cond,&mutex);
   pthread_mutex_unlock(&mutex);

//********************************************************
     pthread_mutex_lock(&mutex);

     write_at_cgsn (g_fd, CMD_SWITCH_SIM_CARD_1 );
      printf("-----2\n");
     pthread_cond_wait(&cond,&mutex);
     pthread_mutex_unlock(&mutex);
   if(sync1!=0)
      {
       pthread_exit(NULL);
      }

//********************************************************
     pthread_mutex_lock(&mutex);

     write_at_cgsn (g_fd,CMD_READ_IMEI);
    printf("------3\n");
    pthread_cond_wait(&cond,&mutex);
     pthread_mutex_unlock(&mutex);

//********************************************************
     pthread_mutex_lock(&mutex);

     write_at_cgsn (g_fd,CMD_SWITCH_SIM_CARD_2);
    printf("------4\n");
     pthread_cond_wait(&cond,&mutex);
     pthread_mutex_unlock(&mutex);
      if(sync1!=0)
      {
       pthread_exit(NULL);
      }
//********************************************************
          pthread_mutex_lock(&mutex);

          write_at_cgsn (g_fd,CMD_READ_IMEI);
       printf("-----5\n");
          pthread_cond_wait(&cond,&mutex);
          pthread_mutex_unlock(&mutex);

      success=1;
       pthread_exit(NULL);
}

int main(int argc, char *argv[]){

int fd1 = 0;
int i=0;
struct pollfd fds[1];
char buf[4096];
void* status;
pthread_t read_thread;
pthread_t write_thread;
printf("11\n");
int rc;

fds[0].fd = port_open ();
g_fd=fds[0].fd;
fds[0].events=POLLIN;

if( pthread_create( &write_thread, NULL, (void *)write_data_fun1 ,NULL) != 0 ) {


       if(DEBUG_LOG) ALOGD("SIMTest:read_IMSI1 pthread_create failed.%s",strerror(errno));
       return -1;
   }

while(fds[0].events){

      pthread_mutex_lock(&mutex);
if(poll(fds,1,0)<0)
{
return 1;
}

if(fds[0].revents)
{
     rc=read(fds[0].fd,buf,4095);
//   printf("rc=%d\n",rc);
   for(i=0;i<rc;i++)
       {
      if (buf[i]=='K')
         {
      pthread_cond_signal(&cond); //send sianal to t_b
   printf("buf[i]==%c\n",buf[i]);
         }
        if (buf[i]=='R')
         {
      pthread_cond_signal(&cond); //send sianal to t_b
   return 1;
         }
       }

if (rc<0)
{
return 1;
}else if(!rc)
{
fds[0].events=0;
}else
{
buf[rc]='\0';
printf("read:%s",buf);
}
}

   pthread_mutex_unlock(&mutex);
if(success==1)
   break;
   }

pthread_join(write_thread,status);

    pthread_mutex_destroy(&mutex);
    pthread_cond_destroy(&cond);
// pthread_cond_destroy(&cond1);

   tthelp_Process(NOPARA_PRTHELP); //start process
   if(_tthlp_Exit()) //exit
   return -1;
   return 0;
}

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