c_cpp/lib/htslib/test/thrash_threads6.c

   1 /* The MIT/Expat License
   2
   3 Copyright (C) 2017 Genome Research Ltd.
   4
   5 Permission is hereby granted, free of charge, to any person obtaining a copy
   6 of this software and associated documentation files (the "Software"), to deal
   7 in the Software without restriction, including without limitation the rights
   8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9 copies of the Software, and to permit persons to whom the Software is
  10 furnished to do so, subject to the following conditions:
  11
  12 The above copyright notice and this permission notice shall be included in
  13 all copies or substantial portions of the Software.
  14
  15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  18 THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21 DEALINGS IN THE SOFTWARE.
  22  */
  23 // Spam seeks
  24 #include <config.h>
  25
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <unistd.h>
  29 #include "htslib/bgzf.h"
  30 #include "htslib/thread_pool.h"
  31
  32 int main(int argc, char *argv[]) {
  33     if (argc <= 1) {
  34         fprintf(stderr, "Usage: thrash_threads4 input.bam\n");
  35         exit(1);
  36     }
  37
  38     // Find a valid seek location ~64M into the file
  39     int i;
  40     ssize_t got;
  41     BGZF *fpin  = bgzf_open(argv[1], "r");
  42     uint64_t upos = 0, uend = 0;
  43     char buf[100000];
  44     for (i = 0; i < 100; i++) {
  45         if ((got = bgzf_read(fpin, buf, 65536)) < 0)
  46             abort();
  47         upos += got;
  48     }
  49     int64_t pos = bgzf_tell(fpin);
  50     while ((got = bgzf_read(fpin, buf, 65536)) > 0) {
  51         uend += got;
  52     }
  53     if (got < 0) abort();
  54     int64_t end = bgzf_tell(fpin);
  55     bgzf_close(fpin);
  56
  57     // Ensure input is big enough to avoid case 3,4 below going off the end
  58     // of the file
  59     if (uend < upos + 10000000) {
  60         fprintf(stderr, "Please supply a bigger input file\n");
  61         exit(1);
  62     }
  63
  64 #define N 1000
  65
  66     // Spam random seeks & reads
  67     for (i = 0; i < 1000; i++) {
  68         printf("i=%d\t", i);
  69         fpin  = bgzf_open(argv[1], "r");
  70         int j, eof = 0, mt = 0;
  71         for (j = 0; j < 80; j++) {
  72             int n = rand() % 7;
  73             putchar('0'+n); fflush(stdout);
  74             switch (n) {
  75             case 0: // start
  76                 if (bgzf_seek(fpin, 0LL, SEEK_SET) < 0) puts("!");//abort();
  77                 eof = 0;
  78                 break;
  79             case 1: // mid
  80                 if (bgzf_seek(fpin, pos, SEEK_SET) < 0) puts("!");//abort();
  81                 eof = 0;
  82                 break;
  83             case 2: // eof
  84                 if (bgzf_seek(fpin, end, SEEK_SET) < 0) puts("!");//abort();
  85                 eof = 1;
  86                 break;
  87             case 3: case 4: {
  88                 int l = rand()%(n==3?100000:100);
  89                 if (bgzf_read(fpin, buf, l) != l*(1-eof)) abort();
  90                 break;
  91             }
  92             case 5:
  93                 usleep(N);
  94                 break;
  95             case 6:
  96                 if (!mt)
  97                     bgzf_mt(fpin, 8, 256);
  98                 mt = 1;
  99                 break;
 100             }
 101         }
 102         printf("\n");
 103         if (bgzf_close(fpin))
 104             abort();
 105     }
 106
 107     return 0;
 108 }