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#pragma once
#include "common/types.h"
#include "kernel/trap.h"
#include "kernel/spinlock.h"
// Context structure, used for context switching
struct Context
{
uint64 ra;
uint64 sp;
// Callee-saved registers
uint64 s0;
uint64 s1;
uint64 s2;
uint64 s3;
uint64 s4;
uint64 s5;
uint64 s6;
uint64 s7;
uint64 s8;
uint64 s9;
uint64 s10;
uint64 s11;
};
// Process State Enumeration
enum ProcState
{
UNUSED,
USED,
SLEEPING,
RUNNABLE,
RUNNING,
ZOMBIE,
};
// Process Control Block (PCB)
struct Proc
{
struct Context context;
struct Trapframe *tf;
uint64 *pagetable;
enum ProcState state;
int pid;
void *kstack;
char name[16];
uint64 sz;
struct Proc *parent;
void *chan;
int xstate;
// Implement later
};
// CPU status structure
struct cpu
{
struct Proc *proc; // Processes currently running on this CPU
struct Context context; // Save the scheduler context here
int noff; // Depth of push_off()
int intena; // Interrupt enable status before closing
};
namespace ProcManager
{
void init();
void scheduler();
void yield();
void create_kernel_thread(void (*func)(), const char *name);
void user_init();
void exit(int status);
int wait(uint64 addr);
void sleep(void *chan, Spinlock *lk);
void wakeup(void *chan);
}
void forkret();
struct Proc *myproc();
void usertrapret();
int fork();
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