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#pragma once
#include <kernel/arch/generic.h>
#include <kernel/handle.h>
#include <kernel/vfs/mount.h>
enum process_state {
PS_RUNNING,
PS_DEAD, // return message wasn't collected
PS_DEADER, // return message was collected
PS_WAITS4CHILDDEATH,
PS_WAITS4FS,
PS_WAITS4REQUEST,
};
struct process {
user_ptr stack_top;
struct pagedir *pages;
struct registers regs;
enum process_state state;
struct process *sibling;
struct process *child;
struct process *parent;
uint32_t id; // only for debugging, don't expose to userland
// meaning changes depending on the state
// PS_DEAD - death message
// PS_WAITS4CHILDDEATH - buffer for said message
user_ptr saved_addr;
size_t saved_len;
struct vfs_mount *mount;
struct handle handles[HANDLE_MAX];
};
extern struct process *process_first;
extern struct process *process_current;
// creates the root process
struct process *process_seed(void);
struct process *process_fork(struct process *parent);
_Noreturn void process_switch(struct process *proc);
_Noreturn void process_switch_any(void); // switches to any running process
struct process *process_find(enum process_state);
handle_t process_find_handle(struct process *proc); // finds the first free handle
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