getpinfo start

defs.h

@@ -9,6 +9,7 @@ struct spinlock;
 struct sleeplock;
 struct stat;
 struct superblock;
+struct pstat;
 
 // bio.c
 void            binit(void);
@@ -120,9 +121,10 @@ void            userinit(void);
 int             wait(void);
 void            wakeup(void*);
 void            yield(void);
-int            cps(void);
+int             cps(void);
 void            mlfq(struct proc**,struct proc**,int*,int*,struct cpu*);
 void            Boost(void);
+int             getpinfo(struct pstat*);
 // swtch.S
 void            swtch(struct context**, struct context*);
 

proc.c

@@ -718,3 +718,9 @@ int cps()
 release(&ptable.lock);
 return 22;  
 }
+
+int getpinfo(struct pstat* pstat)
+{
+;
+return 23;
+}

pstat.h

@@ -0,0 +1,17 @@
+
+#include "proc.h"
+#include "param.h"
+
+
+struct pstat{
+  int inuse[NPROC]; // whether this slot of the process table is in use (1 or 0)
+  int pid[NPROC];   // PID of each process
+  int priority[NPROC];  // current priority level of each process (0-3)
+  enum procstate state[NPROC];  // current state (e.g., SLEEPING or RUNNABLE) of each process
+  int ticks[NPROC][4];  // number of ticks each process has accumulated at each of 4 priorities
+};
+
+typedef struct pstat pstat;
+// extern struct pstat pstat_var;
+
+

syscall.c

@@ -104,6 +104,7 @@ extern int sys_wait(void);
 extern int sys_write(void);
 extern int sys_uptime(void);
 extern int sys_cps(void);
+extern int sys_getpinfo(void);
 
 static int (*syscalls[])(void) = {
 [SYS_fork]    sys_fork,
@@ -128,6 +129,8 @@ static int (*syscalls[])(void) = {
 [SYS_mkdir]   sys_mkdir,
 [SYS_close]   sys_close,
 [SYS_cps]     sys_cps,
+[SYS_getpinfo] sys_getpinfo,
+
 };
 
 void

syscall.h

@@ -21,3 +21,4 @@
 #define SYS_mkdir  20
 #define SYS_close  21
 #define SYS_cps    22
+#define SYS_getpinfo 23

sysproc.c

@@ -6,6 +6,7 @@
 #include "memlayout.h"
 #include "mmu.h"
 #include "proc.h"
+#include "pstat.h"
 
 int
 sys_fork(void)
@@ -93,4 +94,13 @@ int
 sys_cps(void)
 {
   return cps();
+}
+int
+sys_getpinfo(void)
+{
+  struct pstat* pstat;
+
+  if(argptr(1, (void*)&pstat, sizeof(*pstat)) < 0)
+    return -1;
+  return getpinfo(pstat);
 }

user.h

@@ -1,6 +1,6 @@
 struct stat;
 struct rtcdate;
-
+struct pstat;
 // system calls
 int fork(void);
 int exit(void) __attribute__((noreturn));
@@ -24,6 +24,7 @@ char* sbrk(int);
 int sleep(int);
 int uptime(void);
 int cps(void);
+int getpinfo(struct pstat*);
 
 // ulib.c
 int stat(const char*, struct stat*);

usys.S

@@ -30,3 +30,4 @@ SYSCALL(sbrk)
 SYSCALL(sleep)
 SYSCALL(uptime)
 SYSCALL(cps)
+SYSCALL(getpinfo)