1 // Utility subroutines for the C++ library testsuite.
3 // Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
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
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 2, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
27 // invalidate any other reasons why the executable file might be covered by
28 // the GNU General Public License.
30 // This file provides the following:
32 // 1) VERIFY(), via DEBUG_ASSERT, from Brent Verner <brent@rcfile.org>.
33 // This file is included in the various testsuite programs to provide
34 // #define(able) assert() behavior for debugging/testing. It may be
35 // a suitable location for other furry woodland creatures as well.
37 // 2) __set_testsuite_memlimit()
38 // __set_testsuite_memlimit() uses setrlimit() to restrict dynamic memory
39 // allocation. We provide a default memory limit if none is passed by the
40 // calling application. The argument to __set_testsuite_memlimit() is the
41 // limit in megabytes (a floating-point number). If _GLIBCPP_MEM_LIMITS is
42 // not #defined before including this header, then no limiting is attempted.
44 // 3) gnu_counting_struct
45 // This is a POD with a static data member, gnu_counting_struct::count,
46 // which starts at zero, increments on instance construction, and decrements
47 // on instance destruction. "assert_count(n)" can be called to VERIFY()
48 // that the count equals N.
50 // 4) gnu_copy_tracker, from Stephen M. Webb <stephen@bregmasoft.com>.
51 // A class with nontrivial ctor/dtor that provides the ability to track the
52 // number of copy ctors and dtors, and will throw on demand during copy.
54 // 5) gnu_char, gnu_char_traits, abstract character classes and
55 // char_traits specializations for testing instantiations.
57 #ifndef _GLIBCPP_TESTSUITE_HOOKS_H
58 #define _GLIBCPP_TESTSUITE_HOOKS_H
60 #include <bits/c++config.h>
61 #include <bits/functexcept.h>
66 # define VERIFY(fn) assert(fn)
68 # define VERIFY(fn) test &= (fn)
71 // Defined in GLIBCPP_CONFIGURE_TESTSUITE.
72 #ifndef _GLIBCPP_MEM_LIMITS
73 // Don't do memory limits.
75 __set_testsuite_memlimit(float x = 0);
81 #define MEMLIMIT_MB 16.0
85 __set_testsuite_memlimit(float __size = MEMLIMIT_MB);
89 struct gnu_counting_struct
91 // Specifically and glaringly-obviously marked 'signed' so that when
92 // COUNT mistakenly goes negative, we can track the patterns of
93 // deletions more easily.
94 typedef signed int size_type;
95 static size_type count;
96 gnu_counting_struct() { ++count; }
97 gnu_counting_struct (const gnu_counting_struct&) { ++count; }
98 ~gnu_counting_struct() { --count; }
101 #define assert_count(n) VERIFY(gnu_counting_struct::count == n)
103 // A (static) class for counting copy constructors and possibly throwing an
104 // exception on a desired count.
105 class gnu_copy_constructor
116 if (count_ == throw_on_)
118 __throw_exception_again "copy constructor exception";
130 throw_on(unsigned int count)
131 { throw_on_ = count; }
134 static unsigned int count_;
135 static unsigned int throw_on_;
138 // A (static) class for counting assignment operator calls and possibly
139 // throwing an exception on a desired count.
140 class gnu_assignment_operator
151 if (count_ == throw_on_)
153 __throw_exception_again "assignment operator exception";
165 throw_on(unsigned int count)
166 { throw_on_ = count; }
169 static unsigned int count_;
170 static unsigned int throw_on_;
173 // A (static) class for tracking calls to an object's destructor.
190 static unsigned int count_;
193 // An class of objects that can be used for validating various behaviours and
194 // guarantees of containers and algorithms defined in the standard library.
195 class gnu_copy_tracker
198 // Creates a copy-tracking object with the given ID number.
199 // If "throw_on_copy" is set, an exception will be thrown if
200 // an attempt is made to copy this object.
201 gnu_copy_tracker(int id = next_id_--, bool throw_on_copy = false)
203 , throw_on_copy_(throw_on_copy)
207 // Copy-constructs the object, marking a call to the copy
208 // constructor and forcing an exception if indicated.
209 gnu_copy_tracker(const gnu_copy_tracker& rhs)
210 : id_(rhs.id()), throw_on_copy_(rhs.throw_on_copy_)
212 int kkk = throw_on_copy_;
215 gnu_copy_constructor::throw_on(gnu_copy_constructor::count() + 1);
217 gnu_copy_constructor::mark_call();
220 // Assigns the value of another object to this one, tracking the
221 // number of times this member function has been called and if the
222 // other object is supposed to throw an exception when it is
223 // copied, well, make it so.
225 operator=(const gnu_copy_tracker& rhs)
228 if (rhs.throw_on_copy_)
230 gnu_assignment_operator::throw_on(gnu_assignment_operator::count()
233 gnu_assignment_operator::mark_call();
237 { gnu_destructor::mark_call(); }
245 const bool throw_on_copy_;
251 gnu_copy_constructor::reset();
252 gnu_assignment_operator::reset();
253 gnu_destructor::reset();
256 // for backwards-compatibility
259 { return gnu_copy_constructor::count(); }
261 // for backwards-compatibility
264 { return gnu_destructor::count(); }
271 operator==(const gnu_copy_tracker& lhs, const gnu_copy_tracker& rhs)
272 { return lhs.id() == rhs.id(); }
290 // char_traits specialization
293 template<class _CharT>
297 struct char_traits<gnu_char>
299 typedef gnu_char char_type;
300 typedef gnu_int int_type;
301 typedef long pos_type;
302 typedef unsigned long off_type;
303 typedef gnu_state state_type;
306 assign(char_type& __c1, const char_type& __c2);
309 eq(const char_type& __c1, const char_type& __c2);
312 lt(const char_type& __c1, const char_type& __c2);
315 compare(const char_type* __s1, const char_type* __s2, size_t __n);
318 length(const char_type* __s);
320 static const char_type*
321 find(const char_type* __s, size_t __n, const char_type& __a);
324 move(char_type* __s1, const char_type* __s2, size_t __n);
327 copy(char_type* __s1, const char_type* __s2, size_t __n);
330 assign(char_type* __s, size_t __n, char_type __a);
333 to_char_type(const int_type& __c);
336 to_int_type(const char_type& __c);
339 eq_int_type(const int_type& __c1, const int_type& __c2);
345 not_eof(const int_type& __c);
349 #endif // _GLIBCPP_TESTSUITE_HOOKS_H