proc.h

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#pragma once
 
#include <config.h>
#include <fd.h>
#include <list.h>
#include <timer.h>
 
typedef i32 pid_t;
 
#define PROC_FLAG_KERN 0x1
 
typedef enum {
    PROC_STATE_INIT,
    PROC_STATE_READY,
    PROC_STATE_CURR,
    PROC_STATE_WAIT_SEM,
    PROC_STATE_WAIT_CHILD,
    PROC_STATE_SLEEP,
    PROC_STATE_ZOMBIE,
} proc_state_t;
 
typedef struct proc {
    list_node_t node;
    list_node_t tree_node;
 
    pid_t pid;
    u32 flags;
 
    struct proc *parent;
    list_node_t children;
    list_node_t zombie_children;
 
    fd_t fds[PROC_FD_CAPACITY];
 
    proc_state_t state;
    struct proc *proc_waiting;
    timer_t timer;
    i32 exit_status;
 
    void *page_table;
    usize *kern_stack;
    usize *user_stack;
    usize *sp;
} proc_t;
 
extern proc_t *proc_table[];
 
i32 proc_init(proc_t *proc, void *entry, u32 flags, proc_t *parent, i32 argc,
              const char **argv, void *page_table);
void proc_deinit(proc_t *proc);
void proc_ctx_sw(proc_t *old_proc, proc_t *new_proc);
void proc_adopt(proc_t *new_parent, proc_t *proc);
bool proc_is_bad_fd(const proc_t *proc, i32 fd);