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#include <stdio.h>
#include "main.h"
#include "child.h"
#include "parent.h"
#include "common.h"
static char* app_name;
void usage( FILE* output ) {
fprintf(output, "usage: %s -p <x>\n", app_name);
fprintf(output, "`x` must be int between 1 and %d\n", MAX_X);
}
void close_redundant_pipes( dist_info_t *info, uint8_t id ) {
uint8_t i, j;
for(i = 0; i < info->proccnt; i++) {
// don't close all pipes ( ID -> Y )
if( id == i )
continue;
uint8_t base = i * (info->proccnt-1); // base of block of pipes for this process
uint8_t idx; // index number in block of pipes for ( X -> ID )
if( id < i )
idx = id - 1;
else
idx = id;
for(j = 0; j < info->proccnt-1; j++) {
if( j == idx ) {
close( info->pipes[base+j][1] ); // close only write descriptor of ( X -> ID )
} else {
close( info->pipes[base+j][0] ); // close read descriptor of ( X -> Y, where Y != ID )
close( info->pipes[base+j][1] ); // close write descriptor of ( X -> Y, where Y != ID )
}
}
}
}
int main(int argc, char* argv[]) {
uint8_t i, j;
dist_info_t info;
app_name = argv[0];
if( argc != 2 || strcmp( argv[1], "-p") != 0 ) {
usage(stdout);
return 1;
}
// fill info about distributed network
info.x = atoi(argv[2]);
if( info.x < 0 || info.x > MAX_X ) {
usage(stdout);
return 1;
}
info.proccnt = info.x + 1;
info.parent_pid = getpid();
info.events_log = fopen( events_log, "w" );
info.pipes_log = fopen( pipes_log, "w" );
// open all (N * (N-1)) pipes for a full mesh topology
for( i = 0; i < info.proccnt * (info.proccnt - 1); i++ )
pipe(info.pipes[i]);
// for( i = 1; i < info.proccnt; i++ ) {
// pid_t pid = fork();
// switch(pid) {
// case 0:
// /* Child branch */
// child_workflow( &info, i );
// _exit(0);
// break;
// case -1:
// /* Error */
// perror("fork");
// return 1;
// default:
// break;
// }
// }
//
// parent_workflow( &info );
return 0;
}
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