defs.h

struct buf;
struct context;
struct file;
struct inode;
struct pipe;
struct proc;
struct rtcdate;
struct spinlock;
struct sleeplock;
struct stat;
struct superblock;
struct rtcdate;//实时时间结构体

struct shmnode;

// bio.c
void            binit(void);
struct buf*     bread(uint, uint);
void            brelse(struct buf*);
void            bwrite(struct buf*);

// console.c
void            consoleinit(void);
void            cprintf(char*, ...);
void            consoleintr(int(*)(void));
void            panic(char*) __attribute__((noreturn));
int             inittaskmgr(void);
int             closetaskmgr(void);
int             updscrcont(char*, int);
void            clearc(void);
void            insertc(int);

// datetime.c
void			datetime(void*);//时间函数

// exec.c
int             exec(char*, char**);
int             readm(char *, char *, uint, uint, const char *);

// file.c
struct file*    filealloc(void);
void            fileclose(struct file*);
struct file*    filedup(struct file*);
void            fileinit(void);
int             fileread(struct file*, char*, int n);
int             filestat(struct file*, struct stat*);
int             filewrite(struct file*, char*, int n);

// fs.c
void            readsb(int dev, struct superblock *sb);
int             dirlink(struct inode*, char*, uint);
struct inode*   dirlookup(struct inode*, char*, uint*);
struct inode*   ialloc(uint, short);
struct inode*   idup(struct inode*);
void            iinit(int dev);
void            ilock(struct inode*);
void            iput(struct inode*);
void            iunlock(struct inode*);
void            iunlockput(struct inode*);
void            iupdate(struct inode*);
int             namecmp(const char*, const char*);
struct inode*   namei(char*);
struct inode*   nameiparent(char*, char*);
int             readi(struct inode*, char*, uint, uint);
void            stati(struct inode*, struct stat*);
int             writei(struct inode*, char*, uint, uint);
int             swapalloc(struct proc *p);
int             swapdealloc(struct proc *p);
int             swapread(struct proc *p, char *buf, uint offset, uint size);
int             swapwrite(struct proc *p, char *buf, uint offset, uint size);

// ide.c
void            ideinit(void);
void            ideintr(void);
void            iderw(struct buf*);

// ioapic.c
void            ioapicenable(int irq, int cpu);
extern uchar    ioapicid;
void            ioapicinit(void);

// kalloc.c
char*           kalloc(void);
void            kfree(char*);
void            kinit1(void*, void*);
void            kinit2(void*, void*);
uint            get_num_free_pages(void);
void            incr_page_ref(int);
void            decr_page_ref(int);
ushort          get_page_ref(int);

// kbd.c
void            kbdintr(void);

// lapic.c
void            cmostime(struct rtcdate *r);
int             lapicid(void);
extern volatile uint*    lapic;
void            lapiceoi(void);
void            lapicinit(void);
void            lapicstartap(uchar, uint);
void            microdelay(int);

// log.c
void            initlog(int dev);
void            log_write(struct buf*);
void            begin_op();
void            end_op();

// mp.c
extern int      ismp;
void            mpinit(void);

// picirq.c
void            picenable(int);
void            picinit(void);

// pipe.c
int             pipealloc(struct file**, struct file**);
void            pipeclose(struct pipe*, int);
int             piperead(struct pipe*, char*, int);
int             pipewrite(struct pipe*, char*, int);

//PAGEBREAK: 16
// proc.c
int             cpuid(void);
void            exit(void);
int             fork(void);
int             growproc(int);
int             kill(int);
struct cpu*     mycpu(void);
struct proc*    myproc();
void            pinit(void);
void            procdump(void);
void            scheduler(void) __attribute__((noreturn));
void            sched(void);
void            setproc(struct proc*);
void            sleep(void*, struct spinlock*);
void            userinit(void);
int             wait(void);
void            wakeup(void*);
void            yield(void);
void            reparent(int,int);
int             getstate(int);
int             suspend(void);
int             getprocinfo(int*, char(*)[16], int*, uint*);
void            swaptableinit(void);
int             swapstab_growpage(struct proc *pr);
void            memstab_clear(struct proc*);
void            swapstab_clear(struct proc*);

// swtch.S
void            swtch(struct context**, struct context*);

// spinlock.c
void            acquire(struct spinlock*);
void            getcallerpcs(void*, uint*);
int             holding(struct spinlock*);
void            initlock(struct spinlock*, char*);
void            release(struct spinlock*);
void            pushcli(void);
void            popcli(void);

// sleeplock.c
void            acquiresleep(struct sleeplock*);
void            releasesleep(struct sleeplock*);
int             holdingsleep(struct sleeplock*);
void            initsleeplock(struct sleeplock*, char*);

// string.c
int             memcmp(const void*, const void*, uint);
void*           memmove(void*, const void*, uint);
void*           memset(void*, int, uint);
char*           safestrcpy(char*, const char*, int);
int             strlen(const char*);
int             strncmp(const char*, const char*, uint);
char*           strncpy(char*, const char*, int);
char*           itoa(int i, char *s);
int             kstrcmp(const char *p, const char *q);
// syscall.c
int             argint(int, int*);
int             argptr(int, char**, int);
int             argstr(int, char**);
int             fetchint(uint, int*);
int             fetchstr(uint, char**);
void            syscall(void);

// sysfile.c
struct inode *  create(char *path, short type, short major, short minor);
int             isdirempty(struct inode *dp);
int             kunlink(char* path);

// timer.c
void            timerinit(void);

// trap.c
void            idtinit(void);
extern uint     ticks;
void            tvinit(void);
extern struct spinlock tickslock;

// uart.c
void            uartinit(void);
void            uartintr(void);
void            uartputc(int);

// vm.c
void            seginit(void);
void            kvmalloc(void);
pde_t*          setupkvm(void);
char*           uva2ka(pde_t*, char*);
int             allocuvm(pde_t*, uint, uint);
int             deallocuvm(pde_t*, uint, uint);
void            freevm(pde_t*);
void            inituvm(pde_t*, char*, uint);
int             loaduvm(pde_t*, char*, struct inode*, uint, uint);
pde_t*          copyuvm(pde_t*, uint);
void            switchuvm(struct proc*);
void            switchkvm(void);
int             copyout(pde_t*, uint, void*, uint);
void            clearpteu(pde_t *pgdir, char *uva);
void            pagefault(uint err_code);
void            swappage(uint);
void            initshm(void);
int             createshm(uint sig, uint bytes, int type);
int             deleteshm(uint sig);
int             readshm(uint sig, char* rstr, uint num, uint offset);
int             writeshm(uint sig, char* wstr, uint num, uint offset);
int             loaduvm_from_kernel(pde_t *, char *, char *, char *, uint, uint);

// number of elements in fixed-size array
#define NELEM(x) (sizeof(x)/sizeof((x)[0]))