calling calloc - memory leak valgrind
- by Mike
The following code is an example from the NCURSES menu library. I'm not sure what could be wrong with the code, but valgrind reports some problems. Any ideas...
==4803== 1,049 (72 direct, 977 indirect) bytes in 1 blocks are definitely lost in loss record 25 of 36
==4803== at 0x4C24477: calloc (vg_replace_malloc.c:418)
==4803== by 0x400E93: main (in /home/gerardoj/a.out)
==4803==
==4803== LEAK SUMMARY:
==4803== definitely lost: 72 bytes in 1 blocks
==4803== indirectly lost: 977 bytes in 10 blocks
==4803== possibly lost: 0 bytes in 0 blocks
==4803== still reachable: 64,942 bytes in 262 blocks
Source code:
#include <curses.h>
#include <menu.h>
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
#define CTRLD 4
char *choices[] = {
"Choice 1",
"Choice 2",
"Choice 3",
"Choice 4",
"Choice 5",
"Choice 6",
"Choice 7",
"Exit",
}
;
int main()
{
ITEM **my_items;
int c;
MENU *my_menu;
int n_choices, i;
ITEM *cur_item;
/* Initialize curses */
initscr();
cbreak();
noecho();
keypad(stdscr, TRUE);
/* Initialize items */
n_choices = ARRAY_SIZE(choices);
my_items = (ITEM **)calloc(n_choices + 1, sizeof(ITEM *));
for (i = 0; i < n_choices; ++i) {
my_items[i] = new_item(choices[i], choices[i]);
}
my_items[n_choices] = (ITEM *)NULL;
my_menu = new_menu((ITEM **)my_items);
/* Make the menu multi valued */
menu_opts_off(my_menu, O_ONEVALUE);
mvprintw(LINES - 3, 0, "Use <SPACE> to select or unselect an item.");
mvprintw(LINES - 2, 0, "<ENTER> to see presently selected items(F1 to Exit)");
post_menu(my_menu);
refresh();
while ((c = getch()) != KEY_F(1)) {
switch (c) {
case KEY_DOWN:
menu_driver(my_menu, REQ_DOWN_ITEM);
break;
case KEY_UP:
menu_driver(my_menu, REQ_UP_ITEM);
break;
case ' ':
menu_driver(my_menu, REQ_TOGGLE_ITEM);
break;
case 10:
{
char temp[200];
ITEM **items;
items = menu_items(my_menu);
temp[0] = '\0';
for (i = 0; i < item_count(my_menu); ++i)
if(item_value(items[i]) == TRUE) {
strcat(temp, item_name(items[i]));
strcat(temp, " ");
}
move(20, 0);
clrtoeol();
mvprintw(20, 0, temp);
refresh();
}
break;
}
}
free_item(my_items[0]);
free_item(my_items[1]);
free_menu(my_menu);
endwin();
}
