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1.1 root 1:
2:
3: notmem() General Function (libc) notmem()
4:
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8: Check if memory is allocated
9:
10: iinntt nnoottmmeemm(_p_t_r);
11: cchhaarr *_p_t_r;
12:
13: notmem checks if a memory block has been allocated by calloc,
14: malloc, or realloc. ptr points to the block to be checked.
15:
16: notmem searches the arena for ptr. It returns one if ptr is not
17: a memory block obtained from malloc, calloc, or realloc, and zero
18: if it is.
19:
20: ***** Example *****
21:
22: The following example prints a string, and frees it if it was
23: malloc'd.
24:
25:
26: #include <sys/malloc.h>
27:
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29:
30: pfree(s)
31: char *s;
32: {
33: printf("%s\n", s);
34: if(!notmem(s))
35: free(s);
36: }
37:
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39:
40: main()
41: {
42: char *mallocked_string;
43: char notmallocked_string[50];
44:
45:
46:
47: if ((mallocked_string = malloc(50)) == NULL)
48: exit(1);
49:
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51:
52: strcpy(mallocked_string, "This is a malloc'd string");
53: strcpy(notmallocked_string, "This is not a malloc'd string");
54:
55:
56:
57: pfree(mallocked_string);
58: pfree(notmallocked_string);
59: }
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64: COHERENT Lexicon Page 1
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69: notmem() General Function (libc) notmem()
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73:
74: ***** See Also *****
75:
76: arena, calloc(), free(), general functions, malloc(), realloc(),
77: setbuf()
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130: COHERENT Lexicon Page 2
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