freebsdplatformutils.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 665 行 · 第 1/2 页

FileHandle XMLPlatformUtils::openStdInHandle(MemoryManager* const manager)
{
    int nfd = dup(0);
    if (nfd == -1)
	    ThrowXMLwithMemMgr(XMLPlatformUtilsException,
		    XMLExcepts::File_CouldNotDupHandle, manager);
    return (FileHandle) fdopen(nfd, "r");
}

unsigned int
XMLPlatformUtils::readFileBuffer( FileHandle          theFile
                                , const unsigned int  toRead
                                , XMLByte* const      toFill
                                , MemoryManager* const manager)
{
    if ( !theFile || !toFill )
	    ThrowXMLwithMemMgr(XMLPlatformUtilsException,
		    XMLExcepts::CPtr_PointerIsZero, manager);
    if (toRead == 0)
	return 0;
    size_t noOfItemsRead = fread((void*) toFill, 1, toRead, (FILE*)theFile);

    if(ferror((FILE*)theFile))
    {
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotReadFromFile, manager);
    }

    return (unsigned int)noOfItemsRead;
}

void XMLPlatformUtils::writeBufferToFile( FileHandle     const  theFile
					, long                  toWrite
					, const XMLByte* const  toFlush 
                    , MemoryManager* const  manager)
{
    if ( !theFile || !toFlush )
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
		    XMLExcepts::CPtr_PointerIsZero, manager);
    if ( toWrite <= 0 )
        return;

    const XMLByte* tmpFlush = (const XMLByte*) toFlush;
    size_t bytesWritten = 0;

    while (true)
    {
        bytesWritten = fwrite(tmpFlush, sizeof(XMLByte), toWrite, (FILE*)theFile);

        if(ferror((FILE*)theFile))
		{
			ThrowXMLwithMemMgr(XMLPlatformUtilsException,
				XMLExcepts::File_CouldNotWriteToFile, manager);
		}

        if (bytesWritten < (size_t) toWrite) //incomplete write
        {
            tmpFlush += bytesWritten;
            toWrite -= bytesWritten;
            bytesWritten = 0;
        }
        else
            return;
    }
}

void XMLPlatformUtils::resetFile(FileHandle theFile
                                 , MemoryManager* const manager)
{
    if (theFile == NULL)
	ThrowXMLwithMemMgr(XMLPlatformUtilsException,
		 XMLExcepts::CPtr_PointerIsZero, manager);
    // Seek to the start of the file
    if (fseek((FILE*)theFile, 0, SEEK_SET))
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotResetFile, manager);
}


// ---------------------------------------------------------------------------
//  XMLPlatformUtils: File system methods
// ---------------------------------------------------------------------------
XMLCh* XMLPlatformUtils::getFullPath(const XMLCh* const srcPath,
                                     MemoryManager* const manager)
{

    //
    //  NOTE: THe path provided has always already been opened successfully,
    //  so we know that its not some pathological freaky path. It comes in
    //  in native format, and goes out as Unicode always
    //
    char* newSrc = XMLString::transcode(srcPath, manager);
    ArrayJanitor<char> janText(newSrc, manager);

    // Use a local buffer that is big enough for the largest legal path
    char absPath[PATH_MAX + 1];
    // get the absolute path
    char* retPath = realpath(newSrc, &absPath[0]);

    if (!retPath)
    {
        ThrowXMLwithMemMgr(XMLPlatformUtilsException, XMLExcepts::File_CouldNotGetBasePathName, manager);
    }
    return XMLString::transcode(absPath, manager);
}

bool XMLPlatformUtils::isRelative(const XMLCh* const toCheck
                                  , MemoryManager* const manager)
{
    // Check for pathological case of empty path
    if (!toCheck[0])
        return false;

    //
    //  If it starts with a slash, then it cannot be relative. This covers
    //  both something like "\Test\File.xml" and an NT Lan type remote path
    //  that starts with a node like "\\MyNode\Test\File.xml".
    //
    if (toCheck[0] == XMLCh('/'))
        return false;

    // Else assume its a relative path
    return true;
}

XMLCh* XMLPlatformUtils::getCurrentDirectory(MemoryManager* const manager)
{
    char  dirBuf[PATH_MAX + 2];
    char  *curDir = getcwd(&dirBuf[0], PATH_MAX + 1);

    if (!curDir)
    {
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::File_CouldNotGetBasePathName, manager);
    }

    return XMLString::transcode(curDir, manager);
}

inline bool XMLPlatformUtils::isAnySlash(XMLCh c) 
{
    return ( chBackSlash == c || chForwardSlash == c);
}

// ---------------------------------------------------------------------------
//  XMLPlatformUtils: Timing Methods
// ---------------------------------------------------------------------------

unsigned long XMLPlatformUtils::getCurrentMillis()
{
    struct timeval aTime;
    gettimeofday(&aTime, NULL);
    return (unsigned long) (aTime.tv_sec * 1000 + aTime.tv_usec / 1000);

}

// -----------------------------------------------------------------------
//  Mutex methods
// -----------------------------------------------------------------------

#if !defined(APP_NO_THREADS)

// ---------------------------------------------------------------------------
//  XMLPlatformUtils: Platform init method
// ---------------------------------------------------------------------------

static XMLMutex *atomicOpsMutex = 0;

void XMLPlatformUtils::platformInit()
{
    //
    // The atomicOps mutex needs to be created early.
    // Normally, mutexes are created on first use, but there is a
    // circular dependency between compareAndExchange() and
    // mutex creation that must be broken.
    if(!atomicOpsMutex)
    {
        atomicOpsMutex = new (fgMemoryManager) XMLMutex();
        if (atomicOpsMutex->fHandle == 0)
            atomicOpsMutex->fHandle = XMLPlatformUtils::makeMutex();
    }
}

void* XMLPlatformUtils::makeMutex()
{
    pthread_mutex_t* mutex = new pthread_mutex_t;
    pthread_mutexattr_t*  attr = new pthread_mutexattr_t;
    pthread_mutexattr_init(attr);
    pthread_mutexattr_settype(attr, PTHREAD_MUTEX_RECURSIVE);
    if (pthread_mutex_init(mutex, attr))
    {
        ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                 XMLExcepts::Mutex_CouldNotCreate, fgMemoryManager);
    }
    pthread_mutexattr_destroy(attr);
    delete attr;
    return (void*)(mutex);

}

void XMLPlatformUtils::closeMutex(void* const mtxHandle)
{
    if (mtxHandle != NULL)
    {
        if (pthread_mutex_destroy((pthread_mutex_t*) mtxHandle))
        {
            ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                     XMLExcepts::Mutex_CouldNotDestroy, fgMemoryManager);
        }
        delete (pthread_mutex_t*)mtxHandle;
    }
}


void XMLPlatformUtils::lockMutex(void* const mtxHandle)
{
    if (mtxHandle != NULL)
    {
        if (pthread_mutex_lock((pthread_mutex_t*) mtxHandle))
        {
            ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                     XMLExcepts::Mutex_CouldNotLock, fgMemoryManager);
        }
    }
}


void XMLPlatformUtils::unlockMutex(void* const mtxHandle)
{
    if (mtxHandle != NULL)
    {
        if (pthread_mutex_unlock((pthread_mutex_t*) mtxHandle))
        {
            ThrowXMLwithMemMgr(XMLPlatformUtilsException,
                     XMLExcepts::Mutex_CouldNotUnlock, fgMemoryManager);
        }
    }
}


// -----------------------------------------------------------------------
//  Miscellaneous synchronization methods
// -----------------------------------------------------------------------

void* XMLPlatformUtils::compareAndSwap(void**            toFill
                                     , const void* const newValue
                                     , const void* const toCompare)
{
    XMLMutexLock lockMutex(atomicOpsMutex);

    void *retVal = *toFill;
    if (*toFill == toCompare)
        *toFill = (void *)newValue;

    return retVal;
}

int XMLPlatformUtils::atomicIncrement(int &location)
{
    XMLMutexLock localLock(atomicOpsMutex);

    return ++location;
}

int XMLPlatformUtils::atomicDecrement(int &location)
{
    XMLMutexLock localLock(atomicOpsMutex);

    return --location;
}

#else // #if !defined (APP_NO_THREADS)

void XMLPlatformUtils::platformInit()
{
}

void* XMLPlatformUtils::makeMutex()
{
        return 0;
}

void XMLPlatformUtils::closeMutex(void* const mtxHandle)
{
}

void XMLPlatformUtils::lockMutex(void* const mtxHandle)
{
}

void XMLPlatformUtils::unlockMutex(void* const mtxHandle)
{
}

void* XMLPlatformUtils::compareAndSwap (void**             toFill,
                                        const void* const  newValue,
                                        const void* const  toCompare)
{
    void *retVal = *toFill;
    if (*toFill == toCompare)
       *toFill = (void *)newValue;
    return retVal;
}

int XMLPlatformUtils::atomicIncrement(int &location)
{
    return ++location;
}

int XMLPlatformUtils::atomicDecrement(int &location)
{
    return --location;
}

#endif // APP_NO_THREADS

void XMLPlatformUtils::platformTerm()
{
#if !defined(APP_NO_THREADS)
    // delete the mutex we created
	closeMutex(atomicOpsMutex->fHandle);
	atomicOpsMutex->fHandle = 0;
    delete atomicOpsMutex;
    atomicOpsMutex = 0;
#endif
}

#include <xercesc/util/LogicalPath.c>

XERCES_CPP_NAMESPACE_END