/**
* Process the buffer
* Return TRUE to exit program
*/
int process_buf(char **bufargs) {
struct Command *cmd;
int argc = 0;
/* cd command*/
if (!strcmp(bufargs[0], "cd") && bufargs[0][2] == '\0') {
set_cwd(bufargs[1]);
return FALSE;
}
/* exit command */
if (!strcmp(bufargs[0], "exit") && bufargs[0][4] == '\0') {
return TRUE;
}
/* Get argc */
while (bufargs[argc++] != ARR_END);
/* Set up command and first process */
cmd = init_command();
cmd->procHead = init_process(argc * sizeof(char *));
cmd->runningProcs++;
/* Allocate arguments to their processes within the command */
if (allocate_args(argc, bufargs, cmd) == TRUE) {
/* Invalid command */
free_command(NULL, cmd);
return FALSE;
}
/* Add the command to the global commands */
add_global(cmd);
/* For each process in the command, fork it and set it up as running */
fork_command(cmd);
/* If foreground command, then wait on processes */
if (cmd->type == FG) {
wait_running(cmd);
/* set the foreground command to null and clean it */
globalCmd[FG] = NULL;
free_command(NULL, cmd);
}
return FALSE;
}
int
main (int argc, char *argv[])
{
int N;
int i;
pthread_t *tids;
struct args *args_array;
if (argc != 3)
{
fprintf (stderr, "Wrong number of arguments\n");
printf ("Correct usage: %s <base> <final exponent>\n", argv[0]);
exit(1);
}
N = atoi(argv[2]); // Read the upper limit of the sum
N = N+1; // so that the sum actually runs from 0 to N instead of from 0 to N-1
if (N <=0)
{
fprintf (stderr, "The upper limit must be positive\n");
exit(1);
}
sscanf(argv[1], "%f", &base);
results = allocate_results(N);
args_array = allocate_args(N);
tids = allocate_tids(N);
// Assign values to the args of the runner function
for (i = 0; i < N; i += 1)
{
args_array[i].tid = i;
}
for (i = 0; i < N; i += 1)
{
if (pthread_create(&tids[i], NULL, runner, (void *) &args_array[i]))
{
fprintf (stderr, "Error during creation of a thread\n");
exit(1);
}
}
for (i = 0; i < N; i += 1)
{
pthread_join(tids[i], NULL);
}
// This is not required
for (i = 0; i < N; i += 1)
{
printf("The result of %g to the %d is %g\n", base, i, results[i]);
sum+=results[i];
}
// Final result
printf("The sum is %g\n", sum);
return 0;
}
