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#ifndef SCHEDULER_H
#define SCHEDULER_H
#include <fs/ext2.h>
#include <fs/vfs.h>
#include <halts.h>
#include <ipc.h>
#include <lib/stack.h>
#include <mmu.h>
#include <signal.h>
#include <stdbool.h>
#define MAX_PATH 256
#define KEYBOARD_HALT 0
#define WAIT_CHILD_HALT 1
int fork(void);
int exec(const char *filename, char **argv);
void switch_task(int save);
void tasking_init(void);
void exit(int status);
void *mmap(void *addr, size_t length, int prot, int flags, int fd,
size_t offset);
int munmap(void *addr, size_t length);
int msync(void *addr, size_t length, int flags);
int kill(pid_t pid, int sig);
void set_signal_handler(int sig, void (*handler)(int));
typedef struct {
void *u_address;
void *k_address;
u32 length;
int fd;
} MemoryMap;
typedef struct {
uintptr_t handler_ip;
} signal_t;
typedef struct Process process_t;
typedef struct TCB {
uint32_t ESP;
uint32_t CR3;
uint32_t ESP0;
} __attribute__((packed)) TCB;
void process_push_restore_context(process_t *p, reg_t r);
void process_pop_restore_context(process_t *p, reg_t *out_r);
void process_push_signal(process_t *p, signal_t s);
const signal_t *process_pop_signal(process_t *p);
struct Process {
u32 pid;
char program_name[100];
char current_working_directory[MAX_PATH];
u32 eip, esp, ebp;
u32 saved_eip, saved_esp, saved_ebp;
u32 useresp;
u8 incoming_signal;
u32 signal_handler_stack;
void *signal_handlers[20];
void *interrupt_handler;
PageDirectory *cr3;
struct IpcMailbox ipc_mailbox;
vfs_fd_t *file_descriptors[100];
vfs_inode_t *read_halt_inode[100];
vfs_inode_t *write_halt_inode[100];
vfs_inode_t *disconnect_halt_inode[100];
// // FIXME: Make this a array or circular buffer
// reg_t restore_context;
struct stack restore_context_stack;
signal_t *active_signals[100];
u32 halts[2];
struct Halt *halt_list;
void *data_segment_end;
process_t *next;
process_t *parent;
TCB *tcb;
// TODO: Create a linkedlist of childs so that the parent process
// can do stuff such as reap zombies and get status.
process_t *child;
MemoryMap *maps[100];
u32 sleep_until;
int child_rc;
int dead;
};
bool get_task_from_pid(u32 pid, process_t **out);
process_t *get_current_task(void);
int get_free_fd(process_t *p, int allocate);
void free_process(void);
void *get_free_virtual_memory(size_t length);
#endif
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