ipc.c


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#include <stdint.h>
#include <unistd.h>

#include "ipc.h"
#include "main.h"

int send(void * self, local_id dst, const Message * msg) {
  if( self == NULL )
    return 1;

  my_info_t *me = (my_info_t *) self;
  if( me->dist_info == NULL )
    return 1;

  if( dst < 0 || dst > MAX_PROCCNT )
    return 1;

  uint8_t base = me->id * (me->dist_info->proccnt - 1); // base of block of pipes for this process
  uint8_t idx = 0;

  if( me->id < dst )
    idx = base + dst - 1;
  else
    idx = base + dst;

  int    wr_dscr = me->dist_info->pipes[idx][1];
  size_t wr_size = sizeof(msg->s_header) + msg->s_header.s_payload_len;
  if( write( wr_dscr, &msg, wr_size ) != wr_size )
    return 1;

  return 0;
}

int send_multicast(void * self, const Message * msg) {
  if( self == NULL )
    return 1;

  my_info_t *me = (my_info_t *) self;
  if( me->dist_info == NULL )
    return 1;

  size_t wr_size;
  int wr_dscr;

  uint8_t base = me->id * (me->dist_info->proccnt - 1); // base of block of pipes for this process
  uint8_t i;

  for( i = 0; i < me->dist_info->proccnt - 1; i++) {
    wr_dscr = me->dist_info->pipes[base+i][1];
    wr_size = sizeof(msg->s_header) + msg->s_header.s_payload_len;
    if( write( wr_dscr, &msg, wr_size ) != wr_size )
      return 1;
  }

  return 0;
}

int receive(void * self, local_id from, Message * msg) {
  return -1;
}

int receive_any(void * self, Message * msg) {
  return -1;
}