int
tread(spdid_t spdid, td_t td, int cbid, int sz)
{
int ret = -1;
struct channel_info *channel;
struct torrent *t;
char *buf;
if (tor_isnull(td)) return -EINVAL;
LOCK();
t = tor_lookup(td);
if (!t) ERR_THROW(-EINVAL, done);
assert(!tor_is_usrdef(td) || t->data);
if (!(t->flags & TOR_READ)) ERR_THROW(-EACCES, done);
buf = cbuf2buf(cbid, sz);
if (!buf) goto done;
channel = (struct channel_info*)t->data;
ret = cringbuf_consume(&channel->rb, buf, sz);
done:
UNLOCK();
return ret;
}
void read_ltoc(void)
{
char *addr, *start;
unsigned long i, sz;
unsigned short int bid;
int direction;
int channel = COS_TRANS_SERVICE_PONG;
char buf[512];
direction = cos_trans_cntl(COS_TRANS_DIRECTION, channel, 0, 0);
if (direction < 0) {
channels[channel].exists = 0;
return;
}
channels[channel].exists = 1;
channels[channel].direction = direction;
sz = cos_trans_cntl(COS_TRANS_MAP_SZ, channel, 0, 0);
assert(sz <= (4*1024*1024)); /* current 8MB max */
start = valloc_alloc(cos_spd_id(), cos_spd_id(), sz/PAGE_SIZE);
assert(start);
for (i = 0, addr = start ; i < sz ; i += PAGE_SIZE, addr += PAGE_SIZE) {
assert(!cos_trans_cntl(COS_TRANS_MAP, channel, (unsigned long)addr, i));
}
cringbuf_init(&channels[channel].rb, start, sz);
assert(direction == COS_TRANS_DIR_LTOC);
bid = cos_brand_cntl(COS_BRAND_CREATE, 0, 0, cos_spd_id());
assert(bid > 0);
assert(!cos_trans_cntl(COS_TRANS_BRAND, channel, bid, 0));
if (sched_add_thd_to_brand(cos_spd_id(), bid, cos_get_thd_id())) BUG();
while (1) {
int ret, i;
char *p;
struct channel_info *info;
unsigned long long *t, local_t;
// printc("going to wait for input...\n");
if (-1 == (ret = cos_brand_wait(bid))) BUG();
rdtscll(local_t);
ret = cringbuf_consume(&channels[channel].rb, buf, 512);
p = buf;
// while (*p != '\0') {
t = p;
meas[idx++] = (local_t - *t);
assert(local_t > *t);
// printc("local t %llu, start %llu, diff %u\n", local_t, *t, meas[idx-1]);
*p = '\0';
// p++;
// }
if (idx == ITER) break;
}
report();
return;
}
int main(void)
{
int fd;
void *a;
char c, buf[PRINT_CHUNK_SZ];
fd = open(PROC_FILE, O_RDWR);
if (fd < 0) {
perror("open");
exit(-1);
}
trans_ioctl_set_channel(fd, 0);
a = mmap(NULL, MAP_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (MAP_FAILED == a) {
perror("mmap");
exit(-1);
}
cringbuf_init(&sharedbuf, a, MAP_SIZE);
while (1) {
int amnt;
/* wait for an event... */
read(fd, &c, 1);
do {
amnt = cringbuf_consume(&sharedbuf, buf, PRINT_CHUNK_SZ);
write(1 , buf, amnt); /* write to stdout */
} while (amnt);
}
if (munmap(a, MAP_SIZE) < 0) {
perror("munmap");
exit(-1);
}
/* if (write(fd, name, strlen(name)) < 0) { */
/* perror("read"); */
/* exit(-1); */
/* } */
return 0;
}
