/* A 2-D array for storing matrices */
/* Tyler A. Simon */


#include<stdlib.h>
#include<stdio.h>
#include<string.h>
#include<time.h>
 #include <sys/types.h>
       #include <unistd.h>

void getpinfo(void);
int get_statm(int);

int main(int argc, char **argv){


int **A;
int *Astorage;

int n=5;
int m=5;
int i=0;
int j=0;

Astorage = (int *) malloc(n*m*sizeof(int));
A = (int **) malloc(n * sizeof(int *));
printf("%ld\n", sizeof(A));
printf("%ld\n", sizeof(&Astorage));


for (i=0; i<n; i++){
A[i]=&Astorage[i*m];
}

srandom(time(NULL));

//print array
for (i=0; i<n; i++){
	for (j=0; j<m; j++){
	A[i][j]=random()%10; //only random single digit numbers
	printf("%d ",A[i][j]);
	}
	printf("\n");
}
printf("%ld\n", sizeof(A[i][j]));


get_statm(getpid());

return 0;



}//end main


void getpinfo(){
    int pid;
    char cpucmd[255];
    FILE *pipe;
    pid=getpid();
    sprintf(cpucmd, "ps -p %d -L -o cmd,thcount,pid,tid,pcpu,pmem,time,size,psr", pid);
    pipe=popen(cpucmd, "w");
    pclose(pipe);

    /*
    char pidcmd[255];
    sprintf(pidcmd, "pidstat  -tuwr -p %d", pid); 
    pipe=popen(pidcmd, "w");
    pclose(pipe);
    */
}

int get_statm(int pid)
{
    FILE *pstatfp;
    char pstatfname[255];
    int tot_size, memorykb, shared_pages, code_pages, data_pages, lib_pages, dirty_pages;
    int n;
    char *data;

    sprintf(pstatfname, "/proc/%d/statm", pid);
    printf("*** READING %s ***\n", pstatfname);

    if( (pstatfp=fopen(pstatfname, "r")) != NULL)
            {
                    fscanf(pstatfp, "%d %d %d %d %d %d %d", &tot_size, &memorykb, &shared_pages, &code_pages, &data_pages, &lib_pages, &dirty_pages);
                    printf("total_program_size, memorykb, shared_pages, code_pages, data_pages, lib_pages, dirty_pages\n");
                    printf("%d %d %d %d %d %d %d \n\n", tot_size, memorykb, shared_pages, code_pages, data_pages, lib_pages, dirty_pages);
                    fclose(pstatfp);
                    return 0;
                        }
    else
            {
                    perror("statm file not found!");
                        return 1;
                            }

}//end get_statm