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#ifndef DEF_TASK_H
#define DEF_TASK_H
#include <types.h>
#include <mem/paging.h>
#include "idt.h"
#define TS_RUNNING 0
#define TS_WAKEWAIT 2 //Waiting to be waked up by something precise (thread currently blocked)
#define PL_UNKNOWN 4
#define PL_USER 3
#define PL_SERVICE 2
#define PL_DRIVER 1
#define PL_KERNEL 0
#define EX_TH_NORMAL 0x10000 //ERROR code : just one thread exits, because it has to
#define EX_TH_EXCEPTION 0x10001 //ERROR code : just one thread exits, because of an unhandled exception
#define EX_PR_EXCEPTION 0x10002 //ERROR code : all process finishes, because of an unhandled exception
#define USER_STACK_SIZE 0x8000 //32k, but pages will be mapped one by one as used
typedef void (*thread_entry)(void*);
struct process {
uint32_t pid, uid, privilege, threads;
struct process *parent;
struct page_directory *pagedir;
size_t stacksBottom;
struct obj_descriptor *objects;
uint32_t next_objdesc;
struct segment_map *heapseg;
struct process *next; //Forms a linked list
};
struct thread {
struct process *process;
uint32_t esp, ebp, eip;
uint8_t state;
uint32_t timeWait;
void* kernelStack_addr;
uint32_t kernelStack_size;
struct segment_map *userStack_seg;
struct thread *next; //Forms a linked list
};
extern struct thread *current_thread;
void tasking_init();
void tasking_switch();
void tasking_updateKernelPagetable(uint32_t idx, struct page_table *table, uint32_t tablePhysical);
uint32_t tasking_handleException(struct registers *regs);
void thread_goInactive(); //Blocks the current thread. it is then waked up by another thread or a system event.
void thread_wakeUp(struct thread *t);
int proc_priv(); //Returns current privilege level
struct thread * thread_new(struct process *proc, thread_entry entry_point, void *data);
struct process* process_new(struct process *parent, uint32_t uid, uint32_t privilege);
void thread_exit(); //syscall
void process_exit(uint32_t retval); //syscall
int process_setheapseg(size_t start, size_t end); //syscall
#endif
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