89
42 #define LAYOUT_NAME "rweg"
43 #define MAX_BUF_LEN 31
44
45 struct my_root {
46
size_t len;
47
char buf[MAX_BUF_LEN];
48 };
49
50 int
51 main(int argc, char *argv[])
52 {
53
if (argc != 2) {
54
printf("usage: %s file-name\n", argv[0]);
55
return 1;
56
}
57
58
PMEMobjpool *pop = pmemobj_open(argv[1],
59
LAYOUT_NAME);
60
61
if (pop == NULL) {
62
perror("pmemobj_open");
63
return 1;
64
}
65
66
PMEMoid root = pmemobj_root(pop,
67
sizeof(struct my_root));
68
struct my_root *rootp = pmemobj_direct(root);
69
70
if (rootp->len == strlen(rootp->buf))
71
printf("%s\n", rootp->buf);
72
73
pmemobj_close(pop);
74
75
return 0;
76 }
Chapter 7 libpmemobj: a Native traNsaCtioNal objeCt store