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1 | // Copyright (C) 2004 Free Software Foundation, Inc. |
2 | // | |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 2, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING. If not, write to the Free | |
83f51799 | 16 | // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
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17 | // USA. |
18 | ||
19 | // As a special exception, you may use this file as part of a free software | |
20 | // library without restriction. Specifically, if other files instantiate | |
21 | // templates or use macros or inline functions from this file, or you compile | |
22 | // this file and link it with other files to produce an executable, this | |
23 | // file does not by itself cause the resulting executable to be covered by | |
24 | // the GNU General Public License. This exception does not however | |
25 | // invalidate any other reasons why the executable file might be covered by | |
26 | // the GNU General Public License. | |
27 | ||
28 | #include <cstdio> | |
29 | #include <fstream> | |
30 | #include <testsuite_performance.h> | |
31 | ||
32 | // libstdc++/11722 | |
33 | int main() | |
34 | { | |
35 | using namespace std; | |
36 | using namespace __gnu_test; | |
37 | ||
38 | time_counter time; | |
39 | resource_counter resource; | |
40 | ||
41 | const int iterations = 500000; | |
42 | const int chunksize = 100; | |
43 | ||
44 | char* chunk = new char[chunksize]; | |
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45 | const char* name1 = "/usr/share/dict/words"; |
46 | const char* name2 = "/usr/share/dict/linux.words"; | |
47 | const char* name = name1; | |
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48 | |
49 | // C | |
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50 | FILE* file; |
51 | if (!(file = fopen(name, "r"))) | |
52 | { | |
53 | name = name2; | |
54 | if (!(file = fopen(name, "r"))) | |
55 | exit(1); | |
56 | } | |
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57 | setvbuf(file, 0, _IONBF, 0); |
58 | start_counters(time, resource); | |
59 | for (int i = 0; i < iterations; ++i) | |
60 | if (fread(chunk, 1, chunksize, file) < chunksize) | |
61 | fseek(file, 0, SEEK_SET); | |
62 | stop_counters(time, resource); | |
63 | fclose(file); | |
64 | report_performance(__FILE__, "C", time, resource); | |
65 | clear_counters(time, resource); | |
66 | ||
67 | // C unlocked | |
68 | file = fopen(name, "r"); | |
69 | setvbuf(file, 0, _IONBF, 0); | |
70 | start_counters(time, resource); | |
71 | for (int i = 0; i < iterations; ++i) | |
72 | if (fread_unlocked(chunk, 1, chunksize, file) < chunksize) | |
73 | fseek(file, 0, SEEK_SET); | |
74 | stop_counters(time, resource); | |
75 | fclose(file); | |
76 | report_performance(__FILE__, "C unlocked", time, resource); | |
77 | clear_counters(time, resource); | |
78 | ||
79 | // C++ | |
80 | filebuf buf; | |
81 | buf.pubsetbuf(0, 0); | |
82 | buf.open(name, ios_base::in); | |
83 | start_counters(time, resource); | |
84 | for (int i = 0; i < iterations; ++i) | |
85 | if (buf.sgetn(chunk, chunksize) < chunksize) | |
86 | buf.pubseekoff(0, ios::beg); | |
87 | stop_counters(time, resource); | |
88 | report_performance(__FILE__, "C++", time, resource); | |
89 | ||
90 | delete [] chunk; | |
91 | ||
92 | return 0; | |
93 | } |