setQueue system call added

Author: Amirhossein-Rajabpour

defs.h

@@ -132,6 +132,7 @@ int getTurnAroundTime(int pid);
 int getWaitingTime(int pid);
 int getCBT(int pid);
 int customWait(int *procTimes);
+int setQueue(int queueNumber);
 
 // swtch.S
 void swtch(struct context **, struct context *);

proc.c

@@ -121,6 +121,7 @@ allocproc(void)
   p->sleeping_t = 0;
   p->runnable_t = 0;
   p->running_t = 0;
+  p->queue = 0; // by default each process is in the 0 queue
 
   p->rr_remaining_t = QUANTUM;
   p->priority = DEFAULT_PRIORITY;
@@ -792,4 +793,18 @@ int customWait(int *procTimes)
     // Wait for children to exit.  (See wakeup1 call in proc_exit.)
     sleep(curproc, &ptable.lock); //DOC: wait-sleep
   }
+}
+
+int setQueue(int queueNumber)
+{
+  struct proc *curproc = myproc();
+  if (queueNumber > 4 || queueNumber < 1)
+  {
+    return -1;
+  }
+  else
+  {
+    curproc->queue = queueNumber;
+    return 0;
+  }
 }

proc.h

@@ -60,6 +60,7 @@ struct proc
   struct file *ofile[NOFILE]; // Open files
   struct inode *cwd;          // Current directory
   char name[16];              // Process name (debugging)
+  int queue;                  // Defines in which queue the process belongs
 
   // stores how many times each of the syscalls has been called
   int syscallsCount[NSYSCALLS];

syscall.c

@@ -108,6 +108,7 @@ extern int sys_getTurnAroundTime(void);
 extern int sys_getWaitingTime(void);
 extern int sys_getCBT(void);
 extern int sys_customWait(void);
+extern int sys_setQueue(void);
 
 static int (*syscalls[])(void) = {
     [SYS_fork] sys_fork,
@@ -140,6 +141,7 @@ static int (*syscalls[])(void) = {
     [SYS_getWaitingTime] sys_getWaitingTime,
     [SYS_getCBT] sys_getCBT,
     [SYS_customWait] sys_customWait,
+    [SYS_setQueue] sys_setQueue,
 
 };
 

syscall.h

@@ -29,4 +29,5 @@
 #define SYS_getWaitingTime 28
 #define SYS_getCBT 29
 #define SYS_customWait 30
+#define SYS_setQueue 31
 

sysproc.c

@@ -171,4 +171,16 @@ int sys_customWait(void)
   {
     return customWait(procTimes);
   }
+}
+
+int sys_setQueue(void)
+{
+  int queueNumber;
+  if (argint(0, &queueNumber) < 0)
+  {    
+    return -1;
+  }
+  else
+    return setQueue(queueNumber);
+
 }

user.h

@@ -32,6 +32,8 @@ int getTurnAroundTime(int pid);
 int getWaitingTime(int pid);
 int getCBT(int pid);
 int customWait(int *procTimes);
+int setQueue(int queueNumber);
+
 
 // ulib.c
 int stat(const char *, struct stat *);

usys.S

@@ -37,4 +37,7 @@ SYSCALL(changePolicy)
 SYSCALL(getTurnAroundTime)
 SYSCALL(getWaitingTime)
 SYSCALL(getCBT)
+int setQueue(int queueNumber);
 SYSCALL(customWait)
+SYSCALL(setQueue)
+