102 lines
1.7 KiB
C
102 lines
1.7 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <pthread.h>
|
|
#include <unistd.h>
|
|
|
|
/* Non standard include */
|
|
#include <commtech.h>
|
|
#include <specific_comm.h>
|
|
|
|
|
|
__thread struct comm *comm;
|
|
|
|
int init_library(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int finalize_library(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void *create_comm_channel(void)
|
|
{
|
|
struct comm *comm;
|
|
|
|
if (!posix_memalign((void *) &comm, CACHE_LINE_SIZE, sizeof(struct comm)))
|
|
{
|
|
if (!posix_memalign((void *) &comm->shared_space, CACHE_LINE_SIZE, SHARED_SPACE_SIZE))
|
|
{
|
|
comm->cons_idx = 0;
|
|
comm->prod_idx = 0;
|
|
return comm;
|
|
}
|
|
else
|
|
free(comm);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int destroy_comm_channel(void *comm)
|
|
{
|
|
free((void *) ((struct comm *) comm)->shared_space);
|
|
free(comm);
|
|
return 0;
|
|
}
|
|
|
|
int init_producer_thread(void *comm_param)
|
|
{
|
|
comm = (struct comm *) comm_param;
|
|
return 0;
|
|
}
|
|
|
|
int finalize_producer_thread(void *unused)
|
|
{
|
|
comm = NULL;
|
|
return 0;
|
|
}
|
|
|
|
int init_consumer_thread(void *comm_param)
|
|
{
|
|
comm = (struct comm *) comm_param;
|
|
return 0;
|
|
}
|
|
|
|
int finalize_consumer_thread(void *unused)
|
|
{
|
|
comm = NULL;
|
|
return 0;
|
|
}
|
|
|
|
void *recv_one_data(void)
|
|
{
|
|
int cons_idx;
|
|
void *result;
|
|
|
|
cons_idx = comm->cons_idx;
|
|
while (cons_idx == comm->prod_idx);
|
|
result = (void *) comm->shared_space[cons_idx];
|
|
cons_idx = (cons_idx + 1) % SHARED_SPACE_VOIDPTR;
|
|
comm->cons_idx = cons_idx;
|
|
return result;
|
|
}
|
|
|
|
ssize_t recv_some_data(void **buf, size_t count)
|
|
{
|
|
int n, cons_idx;
|
|
|
|
n = 0;
|
|
for(cons_idx = comm->cons_idx; cons_idx != comm->prod_idx; cons_idx = (cons_idx + 1) % SHARED_SPACE_VOIDPTR, comm->cons_idx = cons_idx)
|
|
{
|
|
/*
|
|
* The behaviour of this is not documented but we know
|
|
* the values inside buf won't change during this affectation
|
|
*/
|
|
*buf++ = (void *) comm->shared_space[cons_idx];
|
|
if (++n == count)
|
|
break;
|
|
}
|
|
return n;
|
|
}
|