//在前台执行进程号为pid的进程
void fgCmd(int pid){
JOB *cur= NULL;
sigchld = 1;
int i;
cur=findJob(pid);
if(cur== NULL){
printf("Job %d do not exsit.\n", pid);
return;
}
fgPid = cur->pid;
//cur->state=(char*)malloc(STLEN);
strcpy(cur->state, "running");
//设置signal信号，为下一次按下组合键Ctrl+Z做准备
signal(SIGTSTP, ctrlZ);
//去掉后台程序运行标志
i = strlen(cur->command) - 1;
while(i >= 0 && cur->command[i] != '&')
i--;
cur->command[i] = '\0';
printf("%s\n", cur->command);
//发送SIGCONT信号使进程号为cur->pid的进程继续执行
kill(cur->pid, SIGCONT);
//在前台作业执行完之前处于等待
waitpid(fgPid, NULL, 0);
}
JobInMemory* loadJob(Memory* mem, Job* job, int clock){
if(job->pages==-1){
fprintf(stderr,"Memory management enabled without setting pages \n"
"Please check the Job file\n"
"Aborting...\n");
exit(EXIT_FAILURE);
}
JobInMemory* curjob = findJob(mem->jobs, job);
if(curjob==NULL){
curjob = createJob(mem,job,clock);
}
int pages=0;
if(curjob!=NULL){
for(int j=0;j<curjob->pages_for_job;j++){
Page* thispage = curjob->pages[j];
if(thispage!=NULL &&
thispage->job==job &&
thispage->last_accessed_at != clock) {
debug_print("Found page: %d for job %s \n",
PAGELOC(thispage,mem->pages[0]), job->jobname);
thispage->last_accessed_at = clock; // updates the last accessed time
pages++;
list_iterator_Page* it= malloc(sizeof(*it));
list_Page_iterator_init(it,mem->LRU_list);
Page* curpage = NULL;
while((curpage= list_Page_examine(it))!=NULL){
if(curpage == thispage){
list_Page_remove(it);
break;
}
list_Page_next(it);
}
list_Page_append(mem->LRU_list, thispage);
free(it);
}
else{
if(!assignPage(mem,curjob,j,clock)){
fprintf(stderr,"Unable to assign pages, system error\n");
exit(EXIT_FAILURE);
}
}
pages++;
}
debug_print("Job:%s has loaded %d pages in memory\n",job->jobname,pages);
}
//LRU stuff
return curjob;
}
//ctrl+c命令终止前台进程
void ctrlC(){
JOB *cur = NULL;
if(fgPid == 0)
return;
sigchld = 0;
cur=findJob(fgPid);
if(cur == NULL)
return ;
//发送SIGTERM信号终止前台进程
kill(fgPid, SIGTERM);
//fgPid = 0;
}
//在后台执行进程号为pid的进程
void bgCmd(int pid){
JOB*cur=NULL;
sigchld = 1;
cur=findJob(pid);
if(cur==NULL){
printf("Job %d do not exsit.\n", pid);
return;
}
//由于已经挂起，所以已经获得了＆标记
strcpy(cur->state, "running");
printf("%d\t%s\t%s\n", cur->pid, cur->state, cur->command);
//发送SIGCONT信号使进程号为cur->pid的进程继续执行
kill(cur->pid, SIGCONT);
}
//从一个作业中删除某进程
//返回所属进程组号,如果返回后该作业被撤销，返回进程组号的相反数
pid_t rmJob(pid_t pid)
{
Job* tmp;
plistInt p;
int i;
i = findJob(pid,&tmp);
if(!tmp)
return 0;
p = tmp->pids;
if(p->pid == pid){
tmp->pids = p->next;
//fprintf(stderr,"----- rm job %d\n",pid);
free(p);
}
else{
while(p->next && p->next->pid != pid)
p = p->next;
if(p->next && p->next->pid == pid){
plistInt t = p->next;
p->next = t->next;
free(t);
//fprintf(stderr,"----- rm job %d\n",pid);
}
}
if(tmp->pids==NULL){
Job* t = list;
pid_t tpp;
tmp->state = STOPPED;
tpp = tmp->pgid;
fprintf(stderr,"[%d]\t%s\t%s",i,tmp->state,tmp->cmd);
if(list == tmp)
list = tmp->next;
else{
while(t->next != tmp)
t = t->next;
t->next = tmp->next;
}
free(tmp);
//fprintf(stderr,"----- destroy job %d\n",pid);
return -tpp;
}
return tmp->pgid;
}
// Remove the job from out list
// If the list is empty, set the job counter to zero.
void removeJob(pid_t pid) {
// printf("- [removeJob] Job_counter = %d at BEGIN\n", job_counter);
jobT *job;
if ((job = findJob(pid)) != NULL) {
if (job->next != NULL) {
job->prev->next = job->next;
job->next->prev = job->prev;
// printf("Head == tail : %d", (head == tail));
} else {
tail = job->prev;
tail->next = NULL;
}
free(job);
}
if (head == tail) {
job_counter = 0;
}
// printf("- [removeJob] Job_counter = %d at END\n", job_counter);
}
//ctrl+z命令挂起前台进程
void ctrlZ(){
JOB *cur = NULL;
if(fgPid == 0)
return;
sigchld = 1;
cur=findJob(fgPid);
if(cur == NULL)
cur = insertJob(fgPid);
//cur->state=(char*)malloc(STLEN);
strcpy(cur->state, "stopped");
//cur->command=(char*)malloc(COMMLEN);
cur->command[strlen(cur->command)] = '&';
cur->command[strlen(cur->command) + 1] = '\0';
printf("%d\t%s\t%s\n", cur->pid, cur->state, cur->command);
//发送SIGTERM信号挂起前台进程
kill(fgPid, SIGSTOP);
fgPid = 0;
}
void handleNode(Node* node)
{
if(node->sleeping_for > 0) {
node->sleeping_for--;
return;
}
if(!node->current_job) {
omp_set_lock(&jobs_lock);
Job* job = findJob(node);
if(job) {
float corr = node->getCorrectnessScaledRandom();
job->removeFromSet();
job->assumed_correctness_sum += corr;
job->assumed_correctness[node] = corr;
job->insertToSet();
node->current_job = job;
}
omp_unset_lock(&jobs_lock);
if(!node->current_job) {
return;
}
node->work_scale = 10;
}
node->worked_for++;
if(--node->work_scale == 0) {
Job* job = node->current_job;
omp_set_lock(&jobs_lock);
job->submit(node, 0);
omp_unset_lock(&jobs_lock);
node->current_job = NULL;
}
}
void children (int signum) {
int status;
pid_t pid = waitpid(-1,&status,WUNTRACED);
int exited = WIFEXITED(status);
int stopped = WIFSTOPPED(status);
JobList *j = findJob(pid);
if(!j)
return;
if(exited) {
remove_job(pid);
printf("Job [%d] %s terminated\n", j->id, j->comm);
}
else
if(stopped) {
printf("Job [%d] %s stopped\n", j->id, j->comm);
}
}
// Edit the job's status.
void editJob(pid_t pid, job_status status) {
jobT *job = findJob(pid);
job->status = status;
}