1 | #include <stdio.h> |
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2 | #include <stdlib.h> |
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3 | |
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4 | void foo() |
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5 | { |
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6 | void *p1, *p2, *p3; |
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7 | int rc1 = posix_memalign(&p1, 16, 32); |
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8 | int rc2 = posix_memalign(&p2, 64 * 1024, 64 * 1024 * 2); |
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9 | //int rc3 = posix_memalign(&p3, 256 * 1024, 256 * 1024 * 2); |
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10 | |
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11 | printf("rc1 %d p1 %p\n", rc1, p1); |
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12 | printf("rc2 %d p2 %p\n", rc2, p2); |
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13 | //printf("rc3 %d p3 %p\n", rc3, p3); |
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14 | } |
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15 | |
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16 | void posix_memalign_test (size_t align) |
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17 | { |
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18 | int rc = 0; |
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19 | void *p; |
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20 | size_t sz = align * 2; |
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21 | size_t total_sz = 0; |
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22 | |
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23 | while (!rc) |
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24 | { |
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25 | rc = posix_memalign(&p, align, sz); |
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26 | if (!rc) |
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27 | { |
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28 | total_sz += sz; |
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29 | if (((int) p) & (align - 1)) |
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30 | { |
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31 | printf ("ERROR: Returned pointer %p violates requested alignment 0x%x.\n", |
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32 | p, align); |
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33 | break; |
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34 | } |
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35 | |
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36 | printf ("Allocated next %d bytes at %p.\n", sz, p); |
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37 | } |
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38 | else |
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39 | { |
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40 | printf ("ERROR: Could not allocate next %d bytes. Error %d (%s).\n", |
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41 | sz, errno, strerror(errno)); |
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42 | } |
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43 | } |
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44 | |
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45 | printf ("Total allocated size is %d bytes.\n", total_sz); |
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46 | } |
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47 | |
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48 | int main() |
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49 | { |
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50 | //foo(); |
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51 | //foo(); |
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52 | posix_memalign_test(256 * 1024); |
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53 | return 0; |
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54 | } |
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