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#ifndef DEF_TASK_H
#define DEF_TASK_H
#include <types.h>
#include <mem/paging.h>
#include "idt.h"
#include <lib/earray.h>
#include <tce/vfs.h>
#define TS_RUNNING 0
#define TS_WAKEWAIT 2 //Waiting to be waked up by something precise (thread currently blocked)
#define PL_UNKNOWN 2
#define PL_USER 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 0x10000 //64k, but pages will be mapped one by one as they are used
typedef void (*thread_entry)(void*);
class thread;
class node;
class process {
public:
uint32_t pid, uid, privilege, thread_count;
process *parent;
page_directory *pagedir;
size_t stack, data;
segment_map *dataseg;
bool finished;
int retval;
thread *threads;
thread *threads_waiting; // threads waiting for this process to end
earray<node> fd; // file descriptors
process() : fd(4, 4) {} // must not be used directly
process(process *parent, uint32_t uid, uint32_t privilege);
void* set_args(char** args);
size_t sbrk(ptrdiff_t size);
void finish(int retval);
};
class thread {
public:
class process *process;
uint32_t esp, ebp, eip;
uint8_t state;
void* kernelStack_addr;
uint32_t kernelStack_size;
thread *next, *queue_next; //queue_next is used in sched.c
thread(class process *proc, thread_entry entry_point, void *data, void *u_esp);
~thread();
void wakeUp();
};
extern thread *current_thread;
extern process *current_process;
void tasking_init();
#ifdef __cplusplus
extern "C" void schedule();
#else
void schedule();
#endif
void tasking_updateKernelPagetable(uint32_t idx, page_table *table, uint32_t tablePhysical);
uint32_t tasking_handleException(registers *regs);
void thread_goInactive(); //Blocks the current thread. it is then waked up by another thread or a system event.
int proc_priv(); //Returns current privilege level
// syscalls
void thread_exit();
void process_exit(size_t retval);
size_t process_sbrk(ptrdiff_t size);
void process_brk(size_t ptr);
int process_run(char* file, char** args, FILE zero_fd);
int process_waitpid(int pid, int block);
#endif
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