1 /* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 // vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
3 #ident "$Id$"
4 /*======
5 This file is part of PerconaFT.
6
7
8 Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.
9
10 PerconaFT is free software: you can redistribute it and/or modify
11 it under the terms of the GNU General Public License, version 2,
12 as published by the Free Software Foundation.
13
14 PerconaFT is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
21
22 ----------------------------------------
23
24 PerconaFT is free software: you can redistribute it and/or modify
25 it under the terms of the GNU Affero General Public License, version 3,
26 as published by the Free Software Foundation.
27
28 PerconaFT is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU Affero General Public License for more details.
32
33 You should have received a copy of the GNU Affero General Public License
34 along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
35 ======= */
36
37 #ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."
38
39 #include "loader/dbufio.h"
40 #include <stdio.h>
41 #include <fcntl.h>
42 #include <toku_assert.h>
43 #include <stdlib.h>
44 #include <errno.h>
45 #include <string.h>
46
47 enum { N = 5 };
48 enum { M = 10 };
test1(size_t chars_per_file,size_t bytes_per_read)49 static void test1 (size_t chars_per_file, size_t bytes_per_read) {
50 int fds[N];
51 char fnames[N][100];
52 size_t n_read[N];
53 int still_live[N];
54 int n_live=N;
55 for (int i=0; i<N; i++) {
56 snprintf(fnames[i], 100, "dbufio-test-file%d.data", i);
57 unlink(fnames[i]);
58 fds[i] = open(fnames[i], O_CREAT|O_RDWR, S_IRWXU);
59 //printf("fds[%d]=%d is %s\n", i, fds[i], fnames[i]);
60 assert(fds[i]>=0);
61 n_read[i]=0;
62 still_live[i]=i;
63 for (size_t j=0; j<chars_per_file; j++) {
64 unsigned char c = (i+j)%256;
65 int r = toku_os_write(fds[i], &c, 1);
66 if (r!=0) printf("fds[%d]=%d r=%d errno=%d (%s)\n", i, fds[i], r, errno, strerror(errno));
67 assert(r==0);
68 }
69 {
70 int r = lseek(fds[i], 0, SEEK_SET);
71 assert(r==0);
72 }
73
74 }
75 DBUFIO_FILESET bfs;
76 {
77 int r = create_dbufio_fileset(&bfs, N, fds, M, false);
78 assert(r==0);
79 }
80 while (n_live>0) {
81 int indirectnum = random()%n_live;
82 int filenum = still_live[indirectnum];
83 char buf[bytes_per_read];
84 size_t n_read_here=0;
85 int r = dbufio_fileset_read(bfs, filenum, buf, bytes_per_read, &n_read_here);
86 //printf("read(%d) -> %d (%ld) (old n_read=%ld)\n", filenum, r, n_read_here, n_read[filenum]);
87 if (r==0) {
88 // did read something
89 assert(n_read_here==bytes_per_read);
90 n_read[filenum]+=n_read_here;
91 //printf(" new n_read=%ld\n", n_read[filenum]);
92 assert(n_read[filenum]<=chars_per_file);
93 } else {
94 assert(r==EOF);
95 assert(n_read[filenum]==chars_per_file);
96 still_live[indirectnum] = still_live[n_live-1];
97 n_live--;
98 }
99 }
100 {
101 int r = destroy_dbufio_fileset(bfs);
102 assert(r==0);
103 }
104 for (int i=0; i<N; i++) {
105 {
106 int r = unlink(fnames[i]);
107 assert(r==0);
108 }
109 {
110 int r = close(fds[i]);
111 assert(r==0);
112 }
113 assert(n_read[i]==chars_per_file);
114 }
115 }
116
117
118
main(int argc,char * argv[])119 int main (int argc __attribute__((__unused__)), char *argv[]__attribute__((__unused__))) {
120 // test1(0, 1);
121 // test1(1, 1);
122 // test1(15, 1);
123 // test1(100, 1);
124 test1(30, 3); // 3 and M are relatively prime. But 3 divides the file size.
125 return 0;
126 }
127