p_barrier.c

#include <pal.h>

/**
 *
 * A barrier for 'team'. The barrier is initialized when the team is
 * opened.
 *
 * @param team  Pointer to object containing information about team.
 *
 * @return      Returns 0 if successful.
 *
 */
#include <stdio.h>
#include "pal_base.h"
#include "pal_base_private.h"

int p_barrier(p_team_t team)
{

    printf("Running p_barrier(%p)\n", team);

    /*PUT CODE HERE*/
    // 1.Every processor on the team runs this function
    // 2.When it hits, decrement the counter location in the "boss node"
    // 3.(decrement needs to be an atomic fetch and subtract)
    //(alternatively, there could be one entry for each core)
    // 4.team members "idle" and wait for signal from boss
    // 5.after completion, the boss clears table (resets counter)
    // 5.boss processer sends signal back continue signal

    // assumptions:
    // 1.) the workers have a team structures indicating the upstream root
    // structure location
    // 2.) this structure gets pushed out durung the p_open call
    // 3.)

    return (0);
}