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#include "multisource.h"
#include "simple_label.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <stdio.h>
int really_read(int sock, void* in, size_t count)
{
char* buf = (char*)in;
size_t done = 0;
int r = 0;
while (done < count)
{
if ((r = read(sock,buf,count-done)) == 0)
return 0;
else
if (r < 0)
{
cerr << "argh! bad read! on message from " << sock << endl;
perror(NULL);
exit(0);
}
else
{
done += r;
buf += r;
}
}
return done;
}
bool blocking_get_prediction(int sock, prediction &p)
{
int count = really_read(sock, &p, sizeof(p));
bool ret = (count == sizeof(p));
return ret;
}
bool blocking_get_global_prediction(int sock, global_prediction &p)
{
int count = really_read(sock, &p, sizeof(p));
bool ret = (count == sizeof(p));
return ret;
}
void send_prediction(int sock, prediction &p)
{
if (write(sock, &p, sizeof(p)) < (int)sizeof(p))
{
cerr << "argh! bad write! " << endl;
perror(NULL);
exit(0);
}
}
void send_global_prediction(int sock, global_prediction p)
{
if (write(sock, &p, sizeof(p)) < (int)sizeof(p))
{
cerr << "argh! bad global write! " << sock << endl;
perror(NULL);
exit(0);
}
}
void reset(partial_example &ex)
{
ex.features.erase();
}
size_t num_finished = 0;
int receive_features(parser* p, void* ex)
{
example* ae = (example*)ex;
io_buf* input = p->input;
fd_set fds;
FD_ZERO(&fds);
for (int* sock= input->files.begin; sock != input->files.end-num_finished; sock++)
FD_SET(*sock,&fds);
while (input->files.index() > num_finished)
{
if (select(p->max_fd,&fds,NULL, NULL, NULL) == -1)
{
cerr << "Select failed!" << endl;
perror(NULL);
exit (1);
}
for (int index = 0; index < (int)(input->files.index()-num_finished); index++)
{
int sock = input->files[index];
if (FD_ISSET(sock, &fds))
{//there is a feature or label to read
prediction pre;
if (!blocking_get_prediction(sock, pre) )
{
FD_CLR(sock, &fds);
int swap_target = input->files.index()-num_finished-1;
input->files[index]=input->files[swap_target];
input->files[swap_target]=sock;
int temp = p->ids[index];
p->ids[index]=p->ids[swap_target];
p->ids[swap_target] = temp;
temp = p->counts[index];
p->counts[index]=p->counts[swap_target];
p->counts[swap_target] = temp;
num_finished++;
index--;
}
else
{
if (pre.example_number != ++ (p->counts[index]))
cout << "count is off! " << pre.example_number << " != " << p->counts[index] <<
" for source " << index << " prediction = " << pre.p << endl;
if (pre.example_number == p->finished_count + ring_size)
FD_CLR(sock,&fds);//this ones to far ahead, let the buffer fill for awhile.
size_t ring_index = pre.example_number % p->pes.index();
if (p->pes[ring_index].features.index() == 0)
p->pes[ring_index].example_number = pre.example_number;
if (p->pes[ring_index].example_number != (int)pre.example_number)
cerr << "Error, example " << p->pes[ring_index].example_number << " != " << pre.example_number << endl;
feature f = {pre.p, p->ids[index]};
push(p->pes[ring_index].features, f);
if (sock == p->label_sock) // The label source
{
label_data ld;
size_t len = sizeof(ld.label)+sizeof(ld.weight);
char c[len];
really_read(sock,c,len);
bufread_simple_label(&(p->pes[ring_index].ld), c);
}
if( p->pes[ring_index].features.index() == input->count )
{
push( ae->indices, multindex );
push_many( ae->atomics[multindex], p->pes[ring_index].features.begin, p->pes[ring_index].features.index() );
label_data* ld = (label_data*)ae->ld;
*ld = p->pes[ring_index].ld;
reset(p->pes[ring_index]);
p->finished_count++;
return ae->atomics[multindex].index();
}
}
}
else if (p->counts[index] < p->finished_count + ring_size)
FD_SET(sock,&fds);
}
}
return 0;
}
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