- Boost-users - lists.boost.org

boost filesystem
by Aubrey, Jason 01 Nov '06

01 Nov '06

Hi, When I run the following program it runs successfully but throws an exception during shutdown. I don't know why, but it seems that the call to boost::filesystem::file_size() is corrupting memory somehow. This example only shows the call to file_size() but I think I've seen similar trouble with other calls within boost::filesystem. Am I doing something wrong here or is this a bug? Regards, Jason Aubrey ---------------------- Environment: OS: Win2k Compiler: VS7.1 Boost: v1.33.1 ---------------------- #include <boost/filesystem/operations.hpp> #include <fstream> int main(int, char**) { // Create a file using namespace std; const string fileName("/temp/test.txt"); ofstream file; file.open(fileName.c_str()); const string message("this is a test"); file << message; file.close(); const boost::intmax_t fileSize = boost::filesystem::file_size(fileName); if( fileSize != message.size() ) throw std::exception("Bad result"); return 0; } ---------------------- The following pop-up occurs during program completion: Window Title="Microsoft Visual C++ Debug Library" Window Icon=Critical Error Window Text=" Debug Assertion Failed! Program: .... File: dbgdel.cpp Line: 52 Expression: _BLOCK_TYPE_IS_VALID(pHead->nBlockUse) For information on how your program can cause an assertion failure, see the Visual C++ documentation on asserts. (Press Retry to debug the application)" Buttons=[Abort] [Retry] [Ignore]

3 4

Error when build boost using GCC on AIX, "stdint.h not exist"
by kongko kongko 01 Nov '06

01 Nov '06

Hi,I want to install boost 1.33.1 on PowerPC AIX 5.1,my complier is GCC 4.0.1. This error occure: "/boost_1_33_1/boost/cstdint.hpp:42:23: error: stdint.h: A file or directory in the path name does not exist." I have can't find stdint.h in my system,Does anybody has the same problem?How can i solve it ? Thanks a lot. _________________________________________________________________ 免费下载 MSN Explorer: http://explorer.msn.com/lccn/

1 0

Re: [Boost-users] [Boost.Parameter] How to Use Named Parameters in a Class Hierarchy?
by james.jones＠firstinvestors.com 01 Nov '06

01 Nov '06

From: "Wu Yinghui, Freddie" <yhwu(a)volumeinteractions.com> > To use the class hierarchy, my program loads the DLL requested by user > using LoadLibrary() (We're using Windows, but it should be similar to > Linux, I suppose), and makes use of the Derived1/Derived2 classes via a > pointer to the Base class. > > Since I have no information about the derived classes when building my > main executable (only Base class is known then), I cannot make direct > use of Derived1/Derived2 types in my main program. -- Yet, I need a way > to provide some arbitrary set of arguments to the derived classes. > > Hope my explanation clears your doubts. Do you have any suggestion or > alternative design in mind? Try a single boost::any parameter. Then pass structures as needed. This is essentially equivalent to the void* method everyone used in the bad old pre-Boost days, but it's type-safe. - James Jones Administrative Data Mgmt. Webmaster 375 Raritan Center Pkwy, Suite A Data Architect Edison, NJ 08837

1 0

boost/format/alt_sstream_impl.hpp fails on Solaris
by Martin Lester 31 Oct '06

31 Oct '06

boost/format/alt_sstream_impl.hpp fails to compile on Solaris with Sun Studio 11 compiler (I think). The error complains about being unable to assign a void* to a char* on line 248. I believe an explicit cast fixes this. Martin. (Apologies for diff filenames.) ---- --- alt_sstream_impl.hpp?revision=1.9 2006-10-31 22:55:23.000000000 +0000 +++ alt_sstream_impl.hpp 2006-10-31 22:55:58.000000000 +0000 @@ -245,7 +245,7 @@ add_size /= 2; if(0 < add_size) { new_size += add_size; - newptr = alloc_.allocate(new_size, is_allocated_? oldptr : 0); + newptr = (Ch *) alloc_.allocate(new_size, is_allocated_? oldptr : 0); } if(0 < prev_size) ___________________________________________________________ Copy addresses and emails from any email account to Yahoo! Mail - quick, easy and free. http://uk.docs.yahoo.com/trueswitch2.html

1 0

Re: [Boost-users] boost filesystem
by Lawrence Spector 31 Oct '06

31 Oct '06

I'm running on WinXP with VS7.1 and Boost v1.33.1. I compiled and tried it and was able to reproduce the error. Whenever you open a file, you should always do a check on file.fail() to make sure it opened successfully. You didn't, so you didn't realize the error happened earlier. Boost correctly threw an exception when you tried to check the size of the file. #include <boost/filesystem/operations.hpp> #include <fstream> #include <iostream> int main() { try { // Create a file using namespace std; const string fileName("/temp/test.txt"); ofstream file; file.open(fileName.c_str()); if (file.fail()) { throw std::runtime_error("Unknown file"); } const string message("this is a test"); file << message; file.close(); const boost::intmax_t fileSize = boost::filesystem::file_size(fileName); if( fileSize != message.size() ) throw std::exception("Bad result"); } catch(std::exception& e) { std::cout << "Caught fatal error: " << e.what() << std::endl; } catch(...) { std::cout << "Caught unknown error" << std::endl; } std::cin.get(); // so the window stays up to view output return 0; } Output: Caught fatal error: Unknown file. You probably wanted to make your path C:\temp\test.txt, since it's a Windows program, right? -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Rush Manbert Sent: Tuesday, October 31, 2006 2:45 PM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] boost filesystem Aubrey, Jason wrote: > > Replies are at the end of this message: > Aubrey, Jason wrote: > >>Hi, >> >>When I run the following program it runs successfully but throws an >>exception during shutdown. I don't know why, but it seems that the >>call to boost::filesystem::file_size() is corrupting memory somehow. >>This example only shows the call to file_size() but I think I've seen >>similar trouble with other calls within boost::filesystem. >> >>Am I doing something wrong here or is this a bug? >> >>Regards, >>Jason Aubrey >> >>---------------------- >> >>Environment: >> OS: Win2k >> Compiler: VS7.1 >> Boost: v1.33.1 >> >>---------------------- >> >>#include <boost/filesystem/operations.hpp> #include <fstream> >> >>int main(int, char**) >>{ >> // Create a file >> using namespace std; >> const string fileName("/temp/test.txt"); >> ofstream file; >> file.open(fileName.c_str()); >> const string message("this is a test"); >> file << message; >> file.close(); >> >> const boost::intmax_t fileSize = >>boost::filesystem::file_size(fileName); >> >> if( fileSize != message.size() ) >> throw std::exception("Bad result"); >> >> return 0; >>} >> > > > Either I'm missing something, or... > > file_size takes a path reference as its calling argument. You're passing > a string. How does this even compile? > > - Rush > _______________________________________________ > > Thanks for the Reply Rush. > > If I modify the above code to contain the following I still see the same > behavior: > const boost::filesystem::path filePath(fileName); > const boost::intmax_t fileSize = > boost::filesystem::file_size(filePath); > > Regards, > Jason Aubrey > _______________________________________________ > > Would you be able to print out what the values of message.size() and > fileSize are, right before you do that comparison? > > Thanks, > Lawrence Spector > _______________________________________________ > > Both fileSize and message.size() are 14. The exception thrown is not a > result of the if-block, but the result of a check by the runtime when it > does its cleanup during program shutdown. > Hi Jason, Well, it's too bad that the Easy Answer wasn't the correct answer. :-) I made a console app using VS2005 and Boost 1.33.1, and used your exact code as my main routine. It just works. I also tried setting things up so that my debug build would link against the release version of the library, because the last person that was having filesystem problems had done that, but it just works in that case too. So I'm afraid that I can't reproduce your problem with my Windows setup. If you run your app under the debugger and break when it gets the error, can you tell what sort of object it's trying to delete by backtracking up the stack? That might give some hint about what's happening. Best regards, Rush _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

3 2

Portable SafeInt?
by Troels Arvin 31 Oct '06

31 Oct '06

Hello, I'm wondering: Does Boost have a class like Microsoft's SafeInt? (Portable, of course.) If not: Does anyone have some good guidelines on how to make code (on Linux) integer overflow safe? (Here: Safe == exception generating.) I'm thinking specialized compilers, etc. -- Regards, Troels Arvin <troels(a)arvin.dk> http://troels.arvin.dk/

2 2

Re: [Boost-users] boost filesystem
by Lawrence Spector 31 Oct '06

31 Oct '06

Hmm that's even more interesting, maybe a 2k vs. XP compability issue? The file fails when trying to open on my system. I don't have a 2k system to try it on, so I don't know how much more assistance I can be. Based on the posts so far in this thread, though, I get the impression that different users are getting different results, which is definitely concerning. If I get a chance, I'll try it on my Fedora system tonight and see what happens. In the meantime, good luck. -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Aubrey, Jason Sent: Tuesday, October 31, 2006 4:43 PM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] boost filesystem Thanks for your suggestion Lawrence but I don't think it's related to the problem. I added the following after opening the file but it doesn't throw (since the file is valid): if( !file.is_open() ) throw std::exception("Unable to open file"); To prove that the file is valid: 1) I verified that the program creates the file 2) main() completes as expected. The following is in regard to Rush's comment: The call stack when trouble occurs is as follows: msvcr71d.dll!operator delete(void * pUserData=0x00343418) msvcp71d.dll!std::allocator<char>::deallocate(char * _Ptr=0x00343418, unsigned int __formal=48) msvcp71d.dll!std::string::_Tidy(bool _Built=true, unsigned int _Newsize=0) msvcp71d.dll!std::string::~string() TestsD.exe!$E2() msvcr71d.dll!doexit(int code=0, int quick=0, int retcaller=0) msvcr71d.dll!exit(int code=0) TestsD.exe!mainCRTStartup() kernel32.dll!7c816d4f() ntdll.dll!7c915b4f() kernel32.dll!7c8399f3() The offending code within delete() is: _ASSERTE(_BLOCK_TYPE_IS_VALID(pHead->nBlockUse)); Unfortunately, I couldn't make any sense of the data in or near the bad block. Regards, Jason ---------------------- Environment: OS: Win2k Compiler: VS7.1 Boost: v1.33.1 ---------------------- #include <boost/filesystem/operations.hpp> #include <fstream> // Contrary to simplicity I've enhanced the following to satisfy suggestions int main(int, char**) { // Create a file using namespace std; const string fileName("/temp/test.txt"); ofstream file; file.open(fileName.c_str()); if( !file.is_open() ) throw std::exception("Unable to open file"); const string message("this is a test"); file << message; file.close(); const boost::filesystem::path filePath(fileName); const boost::intmax_t fileSize = boost::filesystem::file_size(filePath); if( fileSize != message.size() ) throw std::exception("Bad result"); return 0; // This line is reached without trouble } _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

1 0

Re: [Boost-users] boost filesystem
by Lawrence Spector 31 Oct '06

31 Oct '06

Would you be able to print out what the values of message.size() and fileSize are, right before you do that comparison? Thanks. -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Aubrey, Jason Sent: Tuesday, October 31, 2006 1:12 PM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] boost filesystem Replies are at the end of this message: Aubrey, Jason wrote: > Hi, > > When I run the following program it runs successfully but throws an > exception during shutdown. I don't know why, but it seems that the > call to boost::filesystem::file_size() is corrupting memory somehow. > This example only shows the call to file_size() but I think I've seen > similar trouble with other calls within boost::filesystem. > > Am I doing something wrong here or is this a bug? > > Regards, > Jason Aubrey > > ---------------------- > > Environment: > OS: Win2k > Compiler: VS7.1 > Boost: v1.33.1 > > ---------------------- > > #include <boost/filesystem/operations.hpp> #include <fstream> > > int main(int, char**) > { > // Create a file > using namespace std; > const string fileName("/temp/test.txt"); > ofstream file; > file.open(fileName.c_str()); > const string message("this is a test"); > file << message; > file.close(); > > const boost::intmax_t fileSize = > boost::filesystem::file_size(fileName); > > if( fileSize != message.size() ) > throw std::exception("Bad result"); > > return 0; > } > Either I'm missing something, or... file_size takes a path reference as its calling argument. You're passing a string. How does this even compile? - Rush _______________________________________________ Thanks for the Reply Rush. If I modify the above code to contain the following I still see the same behavior: const boost::filesystem::path filePath(fileName); const boost::intmax_t fileSize = boost::filesystem::file_size(filePath); Regards, Jason Aubrey _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

3 2

Serialization problem on 64-bit Windows release
by Sigurd Saue 31 Oct '06

31 Oct '06

We've started to use boost serialization and I've run into problems with serialization of derived classes. The "funny" thing is that this happens only on 64-bit Windows release compiled with MS Visual 2005. The same code works fine on Linux 32/64 bit debug/release, on Windows 32-bit debug/release and on Windows 64-bit debug. But not Windows 64-bit release. We use boost version 1.33.1. Here's the code that causes problems (Parameter is the base class, ParamCollection is a vector of Parameters): template<class Archive> static void serialize(Archive & ar, ParamCollection & col, const unsigned int /*version*/) { ar.register_type(static_cast<FloatParameter*>(NULL)); ar.register_type(static_cast<IntParameter*>(NULL)); ar.register_type(static_cast<ChoiceParameter*>(NULL)); ar.register_type(static_cast<StringParameter*>(NULL)); ar.register_type(static_cast<BlobParameter*>(NULL)); ar & boost::serialization::base_object<std::vector<Parameter*> >(col); } When serializing the ParamCollection (serializing, not deserializing) an archive exception is thrown: unregistered class. I've tried to use both abstract and non-abstract base class without any success. I did some research in the boost code and found that the exception was thrown in polymorphic::save (oserializer.hpp) by the last condition (NULL == bpos_ptr). Any clues? Is there a workaround? Thanks, Sigurd

3 4

Re: [Boost-users] Safe way to allocate block of memory
by Nat Goodspeed 31 Oct '06

31 Oct '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org [mailto:boost-users- > bounces(a)lists.boost.org] On Behalf Of Stephen Torri > Sent: Tuesday, October 31, 2006 9:34 AM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] Safe way to allocate block of memory > > On Tue, 2006-10-31 at 06:49 -0500, Nat Goodspeed wrote: > > [Nat] Have you tried using a std::vector<unsigned char>? You can get a > > pointer to the first byte in the vector by &myVector[0]. Then > > std::vector takes care of all the rest for you -- including allocation, > > cleanup and the STL container support. > > // present_pos is an std::vector<boost::uint8_t>::iterator to the > // where the reading will start. > // > // dest_addr_ptr is where to write in memory > // > // length is how many bytes to read. > void read ( boost::uint8_t* dest_addr_ptr, boost::uint32_t const& length ) > { > if ( present_pos + length > data.end() ) > { > // ERROR > } > > memcpy ( dest_addr_ptr, *(*present_pos), length; [Nat] memcpy ( dest_addr_ptr, &(*present_pos), length ); or even // trust STL implementation to optimize appropriately std::copy(present_pos, present_pos + length, dest_addr_ptr); > }

1 0