2 // Utility subroutines for the C++ library testsuite.
4 // Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 2, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING. If not, write to the Free
19 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
22 // As a special exception, you may use this file as part of a free software
23 // library without restriction. Specifically, if other files instantiate
24 // templates or use macros or inline functions from this file, or you compile
25 // this file and link it with other files to produce an executable, this
26 // file does not by itself cause the resulting executable to be covered by
27 // the GNU General Public License. This exception does not however
28 // invalidate any other reasons why the executable file might be covered by
29 // the GNU General Public License.
31 // This file provides the following:
33 // 1) VERIFY(), via _GLIBCXX_ASSERT, from Brent Verner <brent@rcfile.org>.
34 // This file is included in the various testsuite programs to provide
35 // #define(able) assert() behavior for debugging/testing. It may be
36 // a suitable location for other furry woodland creatures as well.
38 // 2) set_memory_limits()
39 // set_memory_limits() uses setrlimit() to restrict dynamic memory
40 // allocation. We provide a default memory limit if none is passed by the
41 // calling application. The argument to set_memory_limits() is the
42 // limit in megabytes (a floating-point number). If _GLIBCXX_MEM_LIMITS is
43 // not #defined before including this header, then no limiting is attempted.
46 // This is a POD with a static data member, gnu_counting_struct::count,
47 // which starts at zero, increments on instance construction, and decrements
48 // on instance destruction. "assert_count(n)" can be called to VERIFY()
49 // that the count equals N.
51 // 4) copy_tracker, from Stephen M. Webb <stephen@bregmasoft.com>.
52 // A class with nontrivial ctor/dtor that provides the ability to track the
53 // number of copy ctors and dtors, and will throw on demand during copy.
55 // 5) pod_char, pod_int, , abstract character classes and
56 // char_traits specializations for testing instantiations.
58 #ifndef _GLIBCXX_TESTSUITE_HOOKS_H
59 #define _GLIBCXX_TESTSUITE_HOOKS_H
61 #include <bits/c++config.h>
62 #include <bits/functexcept.h>
64 #ifdef _GLIBCXX_ASSERT
66 # define VERIFY(fn) assert(fn)
68 # define VERIFY(fn) test &= (fn)
71 #ifdef _GLIBCXX_HAVE_UNISTD_H
79 // All macros are defined in GLIBCXX_CONFIGURE_TESTSUITE and imported
82 // Set memory limits if possible, if not set to 0.
83 #ifndef _GLIBCXX_MEM_LIMITS
84 # define MEMLIMIT_MB 0
87 # define MEMLIMIT_MB 16.0
91 set_memory_limits(float __size = MEMLIMIT_MB);
94 // Check mangled name demangles (using __cxa_demangle) as expected.
96 verify_demangle(const char* mangled, const char* wanted);
99 // Simple callback structure for variable numbers of tests (all with
100 // same signature). Assume all unit tests are of the signature
105 typedef void (*test_type) (void);
109 test_type _M_tests[15];
112 func_callback(): _M_size(0) { };
115 size() const { return _M_size; }
118 tests() const { return _M_tests; }
121 push_back(test_type test)
123 _M_tests[_M_size] = test;
129 // Run select unit tests after setting global locale.
131 run_tests_wrapped_locale(const char*, const func_callback&);
133 // Run select unit tests after setting environment variables.
135 run_tests_wrapped_env(const char*, const char*, const func_callback&);
137 // Try to create a locale with the given name. If it fails, bail.
139 try_named_locale(const char* name);
163 // Specifically and glaringly-obviously marked 'signed' so that when
164 // COUNT mistakenly goes negative, we can track the patterns of
165 // deletions more easily.
166 typedef signed int size_type;
167 static size_type count;
168 counter() { ++count; }
169 counter (const counter&) { ++count; }
170 ~counter() { --count; }
173 #define assert_count(n) VERIFY(__gnu_test::counter::count == n)
175 // A (static) class for counting copy constructors and possibly throwing an
176 // exception on a desired count.
177 class copy_constructor
181 count() { return count_; }
187 if (count_ == throw_on_)
188 __throw_exception_again "copy constructor exception";
199 throw_on(unsigned int count) { throw_on_ = count; }
202 static unsigned int count_;
203 static unsigned int throw_on_;
206 // A (static) class for counting assignment operator calls and
207 // possibly throwing an exception on a desired count.
208 class assignment_operator
212 count() { return count_; }
218 if (count_ == throw_on_)
219 __throw_exception_again "assignment operator exception";
230 throw_on(unsigned int count) { throw_on_ = count; }
233 static unsigned int count_;
234 static unsigned int throw_on_;
237 // A (static) class for tracking calls to an object's destructor.
242 count() { return _M_count; }
245 mark_call() { _M_count++; }
248 reset() { _M_count = 0; }
251 static unsigned int _M_count;
254 // An class of objects that can be used for validating various
255 // behaviours and guarantees of containers and algorithms defined in
256 // the standard library.
260 // Creates a copy-tracking object with the given ID number. If
261 // "throw_on_copy" is set, an exception will be thrown if an
262 // attempt is made to copy this object.
263 copy_tracker(int id = next_id_--, bool throw_on_copy = false)
264 : id_(id) , throw_on_copy_(throw_on_copy) { }
266 // Copy-constructs the object, marking a call to the copy
267 // constructor and forcing an exception if indicated.
268 copy_tracker(const copy_tracker& rhs)
269 : id_(rhs.id()), throw_on_copy_(rhs.throw_on_copy_)
272 copy_constructor::throw_on(copy_constructor::count() + 1);
273 copy_constructor::mark_call();
276 // Assigns the value of another object to this one, tracking the
277 // number of times this member function has been called and if the
278 // other object is supposed to throw an exception when it is
279 // copied, well, make it so.
281 operator=(const copy_tracker& rhs)
284 if (rhs.throw_on_copy_)
285 assignment_operator::throw_on(assignment_operator::count() + 1);
286 assignment_operator::mark_call();
291 { destructor::mark_call(); }
294 id() const { return id_; }
298 const bool throw_on_copy_;
304 copy_constructor::reset();
305 assignment_operator::reset();
309 // for backwards-compatibility
312 { return copy_constructor::count(); }
314 // for backwards-compatibility
317 { return destructor::count(); }
324 operator==(const copy_tracker& lhs, const copy_tracker& rhs)
325 { return lhs.id() == rhs.id(); }
326 } // namespace __gnu_test
330 template<class _CharT>
333 // char_traits specialization
335 struct char_traits<__gnu_test::pod_char>
337 typedef __gnu_test::pod_char char_type;
338 typedef __gnu_test::pod_int int_type;
339 typedef long pos_type;
340 typedef long off_type;
341 typedef __gnu_test::state state_type;
344 assign(char_type& __c1, const char_type& __c2);
347 eq(const char_type& __c1, const char_type& __c2);
350 lt(const char_type& __c1, const char_type& __c2);
353 compare(const char_type* __s1, const char_type* __s2, size_t __n);
356 length(const char_type* __s);
358 static const char_type*
359 find(const char_type* __s, size_t __n, const char_type& __a);
362 move(char_type* __s1, const char_type* __s2, size_t __n);
365 copy(char_type* __s1, const char_type* __s2, size_t __n);
368 assign(char_type* __s, size_t __n, char_type __a);
371 to_char_type(const int_type& __c);
374 to_int_type(const char_type& __c);
377 eq_int_type(const int_type& __c1, const int_type& __c2);
383 not_eof(const int_type& __c);
387 #endif // _GLIBCXX_TESTSUITE_HOOKS_H