// Gioco snake :P
void main_snake()
{
// Prima cosa, sposto la pagina 0 sulla pagina 1
// In sostanza copio da 0xB8000 a 0xB8FFF, su 0xB9000
memcpyb(0xB9000, 0xB8000, 0x1000);
unsigned char *Sbuffer = get_page(1);
tmpfs_read("pixmap.sk", Sbuffer);
//video_scrivi_stringa(Sbuffer);
// Ora posso scrivere tranquillamente sullo schermo:
memcpyb(0xB8000, Sbuffer, 0x1000);
free_page(Sbuffer);
}
/*
* tmpfs_main()
* Endless loop to receive and serve requests
*/
static void
tmpfs_main()
{
struct msg msg;
int x;
struct file *f;
extern int valid_fname(char *, int);
loop:
/*
* Receive a message, log an error and then keep going
*/
x = msg_receive(rootport, &msg);
if (x < 0) {
syslog(LOG_ERR, "msg_receive");
goto loop;
}
/*
* Categorize by basic message operation
*/
f = hash_lookup(filehash, msg.m_sender);
switch (msg.m_op & MSG_MASK) {
case M_CONNECT: /* New client */
new_client(&msg);
break;
case M_DISCONNECT: /* Client done */
dead_client(&msg, f);
break;
case M_DUP: /* File handle dup during exec() */
dup_client(&msg, f);
break;
case M_ABORT: /* Aborted operation */
/*
* We're synchronous, so presumably the operation
* is all done and this abort is old news.
*/
msg_reply(msg.m_sender, &msg);
break;
case FS_OPEN: /* Look up file from directory */
if ((msg.m_nseg != 1) || !valid_fname(msg.m_buf,
msg.m_buflen)) {
msg_err(msg.m_sender, EINVAL);
break;
}
tmpfs_open(&msg, f);
break;
case FS_ABSREAD: /* Set position, then read */
if (msg.m_arg1 < 0) {
msg_err(msg.m_sender, EINVAL);
break;
}
f->f_pos = msg.m_arg1;
/* VVV fall into VVV */
case FS_READ: /* Read file */
tmpfs_read(&msg, f);
break;
case FS_ABSWRITE: /* Set position, then write */
if (msg.m_arg1 < 0) {
msg_err(msg.m_sender, EINVAL);
break;
}
f->f_pos = msg.m_arg1;
/* VVV fall into VVV */
case FS_WRITE: /* Write file */
tmpfs_write(&msg, f);
break;
case FS_SEEK: /* Set new file position */
tmpfs_seek(&msg, f);
break;
case FS_REMOVE: /* Get rid of a file */
if ((msg.m_nseg != 1) || !valid_fname(msg.m_buf,
msg.m_buflen)) {
msg_err(msg.m_sender, EINVAL);
break;
}
tmpfs_remove(&msg, f);
break;
case FS_STAT: /* Tell about file */
tmpfs_stat(&msg, f);
break;
case FS_WSTAT: /* Set stuff on file */
tmpfs_wstat(&msg, f);
break;
case FS_FID: /* Return file ID for caching */
tmpfs_fid(&msg, f);
break;
default: /* Unknown */
msg_err(msg.m_sender, EINVAL);
break;
}
goto loop;
}
