344 lines
8.9 KiB
C++
344 lines
8.9 KiB
C++
// -*- C++ -*-
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// Utility subroutines for the C++ library testsuite.
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//
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// Copyright (C) 2000-2015 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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//
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// This file provides the following:
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//
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// 1) VERIFY(), via _GLIBCXX_ASSERT, from Brent Verner <brent@rcfile.org>.
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// This file is included in the various testsuite programs to provide
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// #define(able) assert() behavior for debugging/testing. It may be
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// a suitable location for other furry woodland creatures as well.
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//
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// 2) set_memory_limits()
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// set_memory_limits() uses setrlimit() to restrict dynamic memory
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// allocation. We provide a default memory limit if none is passed by the
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// calling application. The argument to set_memory_limits() is the
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// limit in megabytes (a floating-point number). If _GLIBCXX_RES_LIMITS is
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// not #defined before including this header, then no limiting is attempted.
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//
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// 3) object_counter
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// This is a POD with a static data member, object_counter::count,
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// which starts at zero, increments on instance construction, and decrements
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// on instance destruction. "assert_count(n)" can be called to VERIFY()
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// that the count equals N.
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//
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// 4) copy_tracker, from Stephen M. Webb <stephen@bregmasoft.com>.
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// A class with nontrivial ctor/dtor that provides the ability to track the
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// number of copy ctors and dtors, and will throw on demand during copy.
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#ifndef _GLIBCXX_TESTSUITE_HOOKS_H
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#define _GLIBCXX_TESTSUITE_HOOKS_H
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#include <bits/c++config.h>
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#include <bits/functexcept.h>
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#include <ctime>
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#ifdef _GLIBCXX_HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef _GLIBCXX_ASSERT
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# include <cassert>
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# define VERIFY(fn) assert(fn)
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#else
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# define VERIFY(fn) test &= bool(fn)
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#endif
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#ifdef _GLIBCXX_HAVE_UNISTD_H
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# include <unistd.h>
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#else
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# define unlink(x)
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#endif
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namespace __gnu_test
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{
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// All macros are defined in GLIBCXX_CONFIGURE_TESTSUITE and imported
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// from c++config.h
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// Set memory limits if possible, if not set to 0.
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#ifndef _GLIBCXX_RES_LIMITS
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# define MEMLIMIT_MB 0
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#else
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# ifndef MEMLIMIT_MB
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# define MEMLIMIT_MB 16.0
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# endif
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#endif
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extern void
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set_memory_limits(float __size = MEMLIMIT_MB);
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extern void
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set_file_limit(unsigned long __size);
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// Check mangled name demangles (using __cxa_demangle) as expected.
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void
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verify_demangle(const char* mangled, const char* wanted);
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// Simple callback structure for variable numbers of tests (all with
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// same signature). Assume all unit tests are of the signature
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// void test01();
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class func_callback
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{
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public:
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typedef void (*test_type) (void);
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private:
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int _M_size;
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test_type _M_tests[15];
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func_callback&
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operator=(const func_callback&);
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func_callback(const func_callback&);
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public:
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func_callback(): _M_size(0) { }
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int
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size() const { return _M_size; }
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const test_type*
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tests() const { return _M_tests; }
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void
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push_back(test_type test)
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{
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_M_tests[_M_size] = test;
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++_M_size;
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}
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};
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// Run select unit tests after setting global locale.
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void
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run_tests_wrapped_locale(const char*, const func_callback&);
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// Run select unit tests after setting environment variables.
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void
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run_tests_wrapped_env(const char*, const char*, const func_callback&);
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// Counting.
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struct object_counter
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{
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// Specifically and glaringly-obviously marked 'signed' so that
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// when COUNT mistakenly goes negative, we can track the patterns
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// of deletions more easily.
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typedef signed int size_type;
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static size_type count;
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object_counter() { ++count; }
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object_counter (const object_counter&) { ++count; }
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~object_counter() { --count; }
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};
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#define assert_count(n) VERIFY(__gnu_test::object_counter::count == n)
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// A (static) class for counting copy constructors and possibly throwing an
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// exception on a desired count.
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class copy_constructor
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{
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public:
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static unsigned int
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count() { return count_; }
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static void
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mark_call()
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{
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count_++;
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if (count_ == throw_on_)
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std::__throw_runtime_error("copy_constructor::mark_call");
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}
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static void
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reset()
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{
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count_ = 0;
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throw_on_ = 0;
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}
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static void
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throw_on(unsigned int count) { throw_on_ = count; }
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private:
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static unsigned int count_;
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static unsigned int throw_on_;
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};
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// A (static) class for counting assignment operator calls and
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// possibly throwing an exception on a desired count.
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class assignment_operator
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{
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public:
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static unsigned int
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count() { return count_; }
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static void
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mark_call()
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{
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count_++;
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if (count_ == throw_on_)
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std::__throw_runtime_error("assignment_operator::mark_call");
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}
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static void
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reset()
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{
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count_ = 0;
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throw_on_ = 0;
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}
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static void
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throw_on(unsigned int count) { throw_on_ = count; }
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private:
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static unsigned int count_;
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static unsigned int throw_on_;
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};
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// A (static) class for tracking calls to an object's destructor.
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class destructor
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{
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public:
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static unsigned int
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count() { return _M_count; }
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static void
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mark_call() { _M_count++; }
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static void
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reset() { _M_count = 0; }
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private:
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static unsigned int _M_count;
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};
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// An class of objects that can be used for validating various
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// behaviours and guarantees of containers and algorithms defined in
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// the standard library.
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class copy_tracker
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{
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public:
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// Creates a copy-tracking object with the given ID number. If
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// "throw_on_copy" is set, an exception will be thrown if an
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// attempt is made to copy this object.
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copy_tracker(int id = next_id_--, bool throw_on_copy = false)
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: id_(id) , throw_on_copy_(throw_on_copy) { }
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// Copy-constructs the object, marking a call to the copy
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// constructor and forcing an exception if indicated.
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copy_tracker(const copy_tracker& rhs)
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: id_(rhs.id()), throw_on_copy_(rhs.throw_on_copy_)
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{
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if (throw_on_copy_)
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copy_constructor::throw_on(copy_constructor::count() + 1);
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copy_constructor::mark_call();
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}
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// Assigns the value of another object to this one, tracking the
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// number of times this member function has been called and if the
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// other object is supposed to throw an exception when it is
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// copied, well, make it so.
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copy_tracker&
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operator=(const copy_tracker& rhs)
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{
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id_ = rhs.id();
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if (rhs.throw_on_copy_)
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assignment_operator::throw_on(assignment_operator::count() + 1);
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assignment_operator::mark_call();
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return *this;
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}
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~copy_tracker()
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{ destructor::mark_call(); }
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int
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id() const { return id_; }
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static void
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reset()
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{
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copy_constructor::reset();
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assignment_operator::reset();
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destructor::reset();
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}
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private:
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int id_;
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const bool throw_on_copy_;
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static int next_id_;
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};
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inline bool
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operator==(const copy_tracker& lhs, const copy_tracker& rhs)
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{ return lhs.id() == rhs.id(); }
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inline bool
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operator<(const copy_tracker& lhs, const copy_tracker& rhs)
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{ return lhs.id() < rhs.id(); }
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// Class for checking required type conversions, implicit and
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// explicit for given library data structures.
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template<typename _Container>
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struct conversion
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{
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typedef typename _Container::const_iterator const_iterator;
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// Implicit conversion iterator to const_iterator.
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static const_iterator
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iterator_to_const_iterator()
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{
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_Container v;
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const_iterator it = v.begin();
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const_iterator end = v.end();
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return it == end ? v.end() : it;
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}
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};
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// A binary semaphore for use across multiple processes.
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class semaphore
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{
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public:
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// Creates a binary semaphore. The semaphore is initially in the
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// unsignaled state.
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semaphore();
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// Destroy the semaphore.
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~semaphore();
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// Signal the semaphore. If there are processes blocked in
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// "wait", exactly one will be permitted to proceed.
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void signal();
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// Wait until the semaphore is signaled.
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void wait();
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private:
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int sem_set_;
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pid_t pid_;
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};
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// For use in 22_locale/time_get and time_put.
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std::tm test_tm(int sec, int min, int hour, int mday, int mon,
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int year, int wday, int yday, int isdst);
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} // namespace __gnu_test
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#endif // _GLIBCXX_TESTSUITE_HOOKS_H
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