libstdc++
compiletime_settings.h
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2007-2021 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the terms
7 // of the GNU General Public License as published by the Free Software
8 // Foundation; either version 3, or (at your option) any later
9 // version.
10 
11 // This library is distributed in the hope that it will be useful, but
12 // WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // General Public License for more details.
15 
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
19 
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
24 
25 /** @file parallel/compiletime_settings.h
26  * @brief Defines on options concerning debugging and performance, at
27  * compile-time.
28  * This file is a GNU parallel extension to the Standard C++ Library.
29  */
30 
31 // Written by Johannes Singler.
32 
33 #include <cstdio>
34 
35 /** @brief Determine verbosity level of the parallel mode.
36  * Level 1 prints a message each time a parallel-mode function is entered. */
37 #define _GLIBCXX_VERBOSE_LEVEL 0
38 
39 /** @def _GLIBCXX_CALL
40  * @brief Macro to produce log message when entering a function.
41  * @param __n Input size.
42  * @see _GLIBCXX_VERBOSE_LEVEL */
43 #if (_GLIBCXX_VERBOSE_LEVEL == 0)
44 #define _GLIBCXX_CALL(__n)
45 #endif
46 #if (_GLIBCXX_VERBOSE_LEVEL == 1)
47 #define _GLIBCXX_CALL(__n) \
48  printf(" %__s:\niam = %d, __n = %ld, __num_threads = %d\n", \
49  __PRETTY_FUNCTION__, omp_get_thread_num(), (__n), __get_max_threads());
50 #endif
51 
52 #ifndef _GLIBCXX_SCALE_DOWN_FPU
53 /** @brief Use floating-point scaling instead of modulo for mapping
54  * random numbers to a range. This can be faster on certain CPUs. */
55 #define _GLIBCXX_SCALE_DOWN_FPU 0
56 #endif
57 
58 #ifndef _GLIBCXX_PARALLEL_ASSERTIONS
59 /** @brief Switch on many _GLIBCXX_PARALLEL_ASSERTions in parallel code.
60  * Should be switched on only locally. */
61 #define _GLIBCXX_PARALLEL_ASSERTIONS (_GLIBCXX_ASSERTIONS+0)
62 #endif
63 
64 #ifndef _GLIBCXX_RANDOM_SHUFFLE_CONSIDER_L1
65 /** @brief Switch on many _GLIBCXX_PARALLEL_ASSERTions in parallel code.
66  * Consider the size of the L1 cache for
67 * gnu_parallel::__parallel_random_shuffle(). */
68 #define _GLIBCXX_RANDOM_SHUFFLE_CONSIDER_L1 0
69 #endif
70 #ifndef _GLIBCXX_RANDOM_SHUFFLE_CONSIDER_TLB
71 /** @brief Switch on many _GLIBCXX_PARALLEL_ASSERTions in parallel code.
72  * Consider the size of the TLB for
73 * gnu_parallel::__parallel_random_shuffle(). */
74 #define _GLIBCXX_RANDOM_SHUFFLE_CONSIDER_TLB 0
75 #endif