src/journal/test-mmap-cache.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <fcntl.h>
   4 #include <stdlib.h>
   5 #include <sys/mman.h>
   6 #include <unistd.h>
   7
   8 #include "fd-util.h"
   9 #include "macro.h"
  10 #include "mmap-cache.h"
  11 #include "tmpfile-util.h"
  12 #include "util.h"
  13
  14 int main(int argc, char *argv[]) {
  15         MMapFileDescriptor *fx;
  16         int x, y, z, r;
  17         char px[] = "/tmp/testmmapXXXXXXX", py[] = "/tmp/testmmapYXXXXXX", pz[] = "/tmp/testmmapZXXXXXX";
  18         MMapCache *m;
  19         void *p, *q;
  20
  21         assert_se(m = mmap_cache_new());
  22
  23         x = mkostemp_safe(px);
  24         assert_se(x >= 0);
  25         unlink(px);
  26
  27         assert_se(fx = mmap_cache_add_fd(m, x));
  28
  29         y = mkostemp_safe(py);
  30         assert_se(y >= 0);
  31         unlink(py);
  32
  33         z = mkostemp_safe(pz);
  34         assert_se(z >= 0);
  35         unlink(pz);
  36
  37         r = mmap_cache_get(m, fx, PROT_READ, 0, false, 1, 2, NULL, &p, NULL);
  38         assert_se(r >= 0);
  39
  40         r = mmap_cache_get(m, fx, PROT_READ, 0, false, 2, 2, NULL, &q, NULL);
  41         assert_se(r >= 0);
  42
  43         assert_se((uint8_t*) p + 1 == (uint8_t*) q);
  44
  45         r = mmap_cache_get(m, fx, PROT_READ, 1, false, 3, 2, NULL, &q, NULL);
  46         assert_se(r >= 0);
  47
  48         assert_se((uint8_t*) p + 2 == (uint8_t*) q);
  49
  50         r = mmap_cache_get(m, fx, PROT_READ, 0, false, 16ULL*1024ULL*1024ULL, 2, NULL, &p, NULL);
  51         assert_se(r >= 0);
  52
  53         r = mmap_cache_get(m, fx, PROT_READ, 1, false, 16ULL*1024ULL*1024ULL+1, 2, NULL, &q, NULL);
  54         assert_se(r >= 0);
  55
  56         assert_se((uint8_t*) p + 1 == (uint8_t*) q);
  57
  58         mmap_cache_free_fd(m, fx);
  59         mmap_cache_unref(m);
  60
  61         safe_close(x);
  62         safe_close(y);
  63         safe_close(z);
  64
  65         return 0;
  66 }