virtual void seek(t_uint64 p_samples,abort_callback & p_abort) {
if (p_samples < m_head.samples) {
switch_to(m_head);
user_seek(p_samples,p_abort);
} else {
p_samples -= m_head.samples;
switch_to(m_body);
user_seek(p_samples,p_abort);
}
}
/**
* @ingroup shell
*
* Take a system call number and run that system call. This is only for
* demonstration.
* @param nargs number of arguments
* @param args array of arguments
* @return non-zero value on error
*/
shellcmd xsh_user(int nargs, char **args)
{
static mailbox mybox;
int call_num;
char buffer[BUF_LENGTH];
if (nargs != 2)
{
printf("Insufficient arguments.\n");
printf("Try again later.\n");
return 1;
}
call_num = atoi(args[1]);
switch (call_num)
{
case 0:
user_none();
break;
case 1:
user_yield();
break;
case 2:
user_sleep(4000);
break;
case 3:
user_kill(5); // pick a better number
break;
case 4:
user_open(LOOP, 0);
break;
case 5:
user_control(LOOP, 0, 1, 2);
break;
case 6:
sprintf(buffer, "Process %d\n", gettid());
user_write(LOOP, buffer, BUF_LENGTH);
break;
case 7:
user_read(LOOP, buffer, BUF_LENGTH);
printf("%s\n", buffer);
break;
case 8:
user_putc(LOOP, 'm');
break;
case 9:
printf("%c\n", user_getc(LOOP));
break;
case 10:
user_seek(LOOP, 5);
break;
case 11:
user_close(LOOP);
break;
case 12:
printf("%d\n", user_getdev("LOOP"));
break;
case 13:
mybox = user_mboxalloc(50);
printf("Mailbox %d assigned.\n", mybox);
break;
case 14:
user_mboxfree(mybox);
break;
case 15:
user_mboxsend(mybox, 0xa5a5a5a5);
break;
case 16:
printf("0x%08x\n", user_mboxrecv(mybox));
break;
default:
printf("No corresponding call.\n");
}
return 0;
}
