src/journal/test-mmap-cache.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright 2012 Lennart Poettering
   4 ***/
   5
   6 #include <fcntl.h>
   7 #include <stdlib.h>
   8 #include <sys/mman.h>
   9 #include <unistd.h>
  10
  11 #include "fd-util.h"
  12 #include "fileio.h"
  13 #include "macro.h"
  14 #include "mmap-cache.h"
  15 #include "util.h"
  16
  17 int main(int argc, char *argv[]) {
  18         MMapFileDescriptor *fx;
  19         int x, y, z, r;
  20         char px[] = "/tmp/testmmapXXXXXXX", py[] = "/tmp/testmmapYXXXXXX", pz[] = "/tmp/testmmapZXXXXXX";
  21         MMapCache *m;
  22         void *p, *q;
  23
  24         assert_se(m = mmap_cache_new());
  25
  26         x = mkostemp_safe(px);
  27         assert_se(x >= 0);
  28         unlink(px);
  29
  30         assert_se(fx = mmap_cache_add_fd(m, x));
  31
  32         y = mkostemp_safe(py);
  33         assert_se(y >= 0);
  34         unlink(py);
  35
  36         z = mkostemp_safe(pz);
  37         assert_se(z >= 0);
  38         unlink(pz);
  39
  40         r = mmap_cache_get(m, fx, PROT_READ, 0, false, 1, 2, NULL, &p, NULL);
  41         assert_se(r >= 0);
  42
  43         r = mmap_cache_get(m, fx, PROT_READ, 0, false, 2, 2, NULL, &q, NULL);
  44         assert_se(r >= 0);
  45
  46         assert_se((uint8_t*) p + 1 == (uint8_t*) q);
  47
  48         r = mmap_cache_get(m, fx, PROT_READ, 1, false, 3, 2, NULL, &q, NULL);
  49         assert_se(r >= 0);
  50
  51         assert_se((uint8_t*) p + 2 == (uint8_t*) q);
  52
  53         r = mmap_cache_get(m, fx, PROT_READ, 0, false, 16ULL*1024ULL*1024ULL, 2, NULL, &p, NULL);
  54         assert_se(r >= 0);
  55
  56         r = mmap_cache_get(m, fx, PROT_READ, 1, false, 16ULL*1024ULL*1024ULL+1, 2, NULL, &q, NULL);
  57         assert_se(r >= 0);
  58
  59         assert_se((uint8_t*) p + 1 == (uint8_t*) q);
  60
  61         mmap_cache_free_fd(m, fx);
  62         mmap_cache_unref(m);
  63
  64         safe_close(x);
  65         safe_close(y);
  66         safe_close(z);
  67
  68         return 0;
  69 }