我在C中准备了队列模拟器的代码。 尝试编译和运行时，它会出现以下错误： [错误]＆＃39; sigINT＆＃39;未申报（首次使用此功能） [错误]＆＃39; sigQUIT＆＃39;未申报（首次使用此功能）
这里出了什么问题？我该如何纠正？
部分代码如下：
#include "subsystems.h" //preprocessor command to integrate subsystems
#include <stdio.h> //including basic C commands
#include <pthread.h> //including POSIX thread library
#include <stdlib.h>
#include <signal.h>
//GLOBAL CONSTANTS
#define THREADS 4
//GLOBAL VARIABLES
pthread_cond_t queue_not_empty; //thread condition variable
pthread_mutex_t SIM_LOG;
report_f fr[THREADS]; //CPU data reporting data structures
//BugFixes
#define SIM_SEC 5 //Security constant
int SSEC; //Security variable for exitting
//Thread routines
void * job(void * param) //ready_Q loading function for thread routine
{
load_proc((load_proc_t *)param,&queue_not_empty);
pthread_exit(NULL); //exit thread execution after reaching EOF in job_file.sys
}
void * cpu(void * param) //CPU managing function
{
cpu_data_bind_t * data = (cpu_data_bind_t *)param; //bind parsed data to given CPU
ready_Q * rq = data->rq;
cpu_t *ct = data->cpu;
printf("CPU:%d functional\n",ct->_id); //reporting CPU status
while (1 == 1)
{
//store the current CPU statistics to create final report
fr[ct->_id]._nProc = ct->num_processes;
fr[ct->_id]._turn = ct->total_turn_around_time;
fr[ct->_id]._wait = ct->total_waiting_time;
//locking ready_Q
pthread_mutex_lock(&rq->mutex);
printf("CPU:%d is idle\n",ct->_id); //Report CPU status
SSEC++; //Security protocol
int h = isQFull(rq); //Check for Queue is Empty
if (h != 0)
{
//make the CPU wait till signal on condition variable is recieved
pthread_cond_wait(&queue_not_empty,&rq->mutex);
}
attach_process(ct,rq); //attach given process to CPU
printf("\n\t--> process %d attached to CPU : %d\n\n",ct->_running->proc_ID,ct->_id);
pthread_mutex_unlock(&rq->mutex);
pthread_mutex_lock(&SIM_LOG);
CPU_simulation_service(ct,1,0);
pthread_mutex_unlock(&SIM_LOG);
execute_process(ct);
pthread_mutex_lock(&SIM_LOG);
CPU_simulation_service(ct,0,0);
pthread_mutex_unlock(&SIM_LOG);
}
pthread_exit(NULL);
}
void sigINT_handle()
{
if(SSEC > SIM_SEC)
{
fr[0]._nProc = 0,fr[0]._turn = 0, fr[0]._wait = 0;
int i=0;
pthread_mutex_lock(&SIM_LOG);
for (i=0;i<THREADS;i++)
{
fr[0]._nProc += fr[i]._nProc;
fr[0]._turn += fr[i]._turn;
fr[0]._wait += fr[i]._wait;
}
pthread_mutex_unlock(&SIM_LOG);
int p = finalReport(&fr[0]);
printf("\nFinal statistics are reported.\nSimulator exitting...\n");
exit(0);
}
else
{
errorReport(6);
signal(SIGINT,sigINT_handle);
}
}
void sigQUIT_handle()
{
printf("\n\nExitting simulator..\n\n");
exit(0);
}
void interactor(int i)
{
switch(i){
case 1 : readJobFile();
printf("press any key to continue..");
getchar();
printf("\n");
break;
default:
printf("\ncontinue simulator operations\n\n");
break;
}
}
//Main thread
int main(int argc, char *argv[])
{
//WAITING TILL MAIN IS INITIALIZED...
signal(sigINT,sigINT_handle); //signal handler for keyboard INTERRUPT
signal(sigQUIT,sigQUIT_handle); //signal handler for keyboard QUIT
int wait=0,read = -1; //Initializing waiting time to zero.
if (argc != 2){
errorReport(3); //Invalid usage reporting.
return -1;
}
else{
if (strcmp(argv[1],"/0")==0)
wait = 0; //handling zero special case.
else if (atoi(argv[1]) == 0){
errorReport(4); //invalid argument reporting
return -1;
}else
wait = atoi(argv[1]); //valid argument setting up.
}
resetSimulation(); //Reset this simulation from previouse simulations.
int k = createJobFile(); //creating the job_file.sys
if (k != 0)
return -1; //Exceptional exit. cannot create file.
else
printf("\n------\n\tSimulator initializing completed\n\tUsage info: keyboard generated interrupt(ctrl + 'C') will quit the simulator\n\tTo exit without reporting, press \" ctrl + \\ \" \n------\n\n");
SSEC = 0;
//INITIALIZE COMPLETED
char sx; //user interaction handling
int ix = 0;
printf("press 1 to view job file log : ");
scanf("%s",&sx);
ix = atoi(&sx);
interactor(ix);
getchar();
//to remove user interactions comment out this section
ready_Q rq; //create ready_Q object.
init_q(&rq); //Initialize ready_Q object
load_proc_t lpt;
lpt.readyq = &rq;
lpt.w = wait; //setting up completed for parameter transfer
//thread setup
pthread_t tid[THREADS]; //creating unique ID's for threads to special purposes.
pthread_attr_t attr; //creating a pthread_attr_t object
pthread_attr_init(&attr); //initializing pthread_attr_t value with defaults.
pthread_mutex_init(&rq.mutex,NULL); //initialize the mutexes
pthread_mutex_init(&SIM_LOG,NULL);
pthread_cond_init(&queue_not_empty,NULL);
//created threads aare joinable.[With respect to POSIX standard]
//by default POSIX pthreads are joinable
pthread_create(&tid[0],&attr,(void *)job,(void *)&lpt); //ready_Q is loaded with processes
//creating CPU instances
cpu_t cpu1 = getInstance(1);
cpu_t cpu2 = getInstance(2);
cpu_t cpu3 = getInstance(3);
//creating data binders for each CPU
cpu_data_bind_t c1_dt;
cpu_data_bind_t c2_dt;
cpu_data_bind_t c3_dt;
//attach data binders for each CPU
c1_dt.cpu = &cpu1; //CPU 1
c1_dt.rq = &rq;
c2_dt.cpu = &cpu2; //CPU 2
c2_dt.rq = &rq;
c3_dt.cpu = &cpu3; //CPU 3
c3_dt.rq = &rq;
//create CPU thread(s)
pthread_create(&tid[1],&attr,(void *)cpu,(void *)&c1_dt);
pthread_create(&tid[2],&attr,(void *)cpu,(void *)&c2_dt);
pthread_create(&tid[3],&attr,(void *)cpu,(void *)&c3_dt);
int i =0;
//suspend main thread till all processing is done.
for (i = 0;i<THREADS;i++)
pthread_join(tid[i],NULL);
return 0; //normal exit status is reported.
}
答案 0 :(得分：1)
signal(sigINT,sigINT_handle); //signal handler for keyboard INTERRUPT
signal(sigQUIT,sigQUIT_handle); //signal handler for keyboard QUIT
在上面的代码中，信号名称必须全部大写。这分别是SIGINT和SIGQUIT：
signal(SIGINT,sigINT_handle);
signal(SIGQUIT,sigQUIT_handle);