int OGRFMECacheIndex::Lock()
{
if( pszPath == NULL )
return FALSE;
hLock = CPLLockFile( pszPath, 5.0 );
return hLock != NULL;
}
void GDALPamProxyDB::SaveDB()
{
/* -------------------------------------------------------------------- */
/* Open the database relating original names to proxy .aux.xml */
/* file names. */
/* -------------------------------------------------------------------- */
CPLString osDBName =
CPLFormFilename( osProxyDBDir, "gdal_pam_proxy", "dat" );
void *hLock = CPLLockFile( osDBName, 1.0 );
// proceed even if lock fails - we need CPLBreakLockFile()!
if( hLock == NULL )
{
CPLError( CE_Warning, CPLE_AppDefined,
"GDALPamProxyDB::SaveDB() - Failed to lock %s file, proceeding anyways.",
osDBName.c_str() );
}
FILE *fpDB = VSIFOpenL( osDBName, "w" );
if( fpDB == NULL )
{
if( hLock )
CPLUnlockFile( hLock );
CPLError( CE_Failure, CPLE_AppDefined,
"Failed to save %s Pam Proxy DB.\n%s",
osDBName.c_str(),
VSIStrerror( errno ) );
return;
}
/* -------------------------------------------------------------------- */
/* Write header. */
/* -------------------------------------------------------------------- */
GByte abyHeader[100];
memset( abyHeader, ' ', sizeof(abyHeader) );
strncpy( (char *) abyHeader, "GDAL_PROXY", 10 );
sprintf( (char *) abyHeader + 10, "%9d", nUpdateCounter );
VSIFWriteL( abyHeader, 1, 100, fpDB );
/* -------------------------------------------------------------------- */
/* Write names. */
/* -------------------------------------------------------------------- */
unsigned int i;
for( i = 0; i < aosOriginalFiles.size(); i++ )
{
size_t nBytesWritten;
const char *pszProxyFile;
VSIFWriteL( aosOriginalFiles[i].c_str(), 1,
strlen(aosOriginalFiles[i].c_str())+1, fpDB );
pszProxyFile = CPLGetFilename(aosProxyFiles[i]);
nBytesWritten = VSIFWriteL( pszProxyFile, 1,
strlen(pszProxyFile)+1, fpDB );
if( nBytesWritten != strlen(pszProxyFile)+1 )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Failed to write complete %s Pam Proxy DB.\n%s",
osDBName.c_str(),
VSIStrerror( errno ) );
VSIFCloseL( fpDB );
VSIUnlink( osDBName );
return;
}
}
VSIFCloseL( fpDB );
if( hLock )
CPLUnlockFile( hLock );
}
void GDALPamProxyDB::SaveDB()
{
/* -------------------------------------------------------------------- */
/* Open the database relating original names to proxy .aux.xml */
/* file names. */
/* -------------------------------------------------------------------- */
CPLString osDBName =
CPLFormFilename( osProxyDBDir, "gdal_pam_proxy", "dat" );
void *hLock = CPLLockFile( osDBName, 1.0 );
// proceed even if lock fails - we need CPLBreakLockFile()!
if( hLock == NULL )
{
CPLError( CE_Warning, CPLE_AppDefined,
"GDALPamProxyDB::SaveDB() - "
"Failed to lock %s file, proceeding anyways.",
osDBName.c_str() );
}
VSILFILE *fpDB = VSIFOpenL( osDBName, "w" );
if( fpDB == NULL )
{
if( hLock )
CPLUnlockFile( hLock );
CPLError( CE_Failure, CPLE_AppDefined,
"Failed to save %s Pam Proxy DB.\n%s",
osDBName.c_str(),
VSIStrerror( errno ) );
return;
}
/* -------------------------------------------------------------------- */
/* Write header. */
/* -------------------------------------------------------------------- */
const size_t nHeaderSize = 100;
GByte abyHeader[nHeaderSize] = { '\0' };
memset( abyHeader, ' ', sizeof(abyHeader) );
memcpy( reinterpret_cast<char *>(abyHeader), "GDAL_PROXY", 10 );
snprintf( reinterpret_cast<char *>(abyHeader) + 10, sizeof(abyHeader) - 10,
"%9d", nUpdateCounter );
if( VSIFWriteL( abyHeader, 1, nHeaderSize, fpDB ) != nHeaderSize )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Failed to write complete %s Pam Proxy DB.\n%s",
osDBName.c_str(),
VSIStrerror( errno ) );
CPL_IGNORE_RET_VAL(VSIFCloseL( fpDB ));
VSIUnlink( osDBName );
if( hLock )
CPLUnlockFile( hLock );
return;
}
/* -------------------------------------------------------------------- */
/* Write names. */
/* -------------------------------------------------------------------- */
for( unsigned int i = 0; i < aosOriginalFiles.size(); i++ )
{
size_t nCount = VSIFWriteL( aosOriginalFiles[i].c_str(),
strlen(aosOriginalFiles[i].c_str())+1, 1, fpDB );
const char *pszProxyFile = CPLGetFilename(aosProxyFiles[i]);
nCount += VSIFWriteL( pszProxyFile,
strlen(pszProxyFile)+1, 1, fpDB );
if( nCount != 2 )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Failed to write complete %s Pam Proxy DB.\n%s",
osDBName.c_str(),
VSIStrerror( errno ) );
CPL_IGNORE_RET_VAL(VSIFCloseL( fpDB ));
VSIUnlink( osDBName );
if( hLock )
CPLUnlockFile( hLock );
return;
}
}
if( VSIFCloseL( fpDB ) != 0 )
{
CPLError(CE_Failure, CPLE_FileIO, "I/O error");
}
if( hLock )
CPLUnlockFile( hLock );
}