transfer file with Ice

hi!
I use ice to develop transfer files, got the follow message, also i found my memoy reduce faster, thank you for help!
10/11/07 09:47:30.546 warning: dispatch exception: Thread.cpp:428: IceUtil::ThreadSyscallException:
thread syscall exception: Cannot allocate memory
identity: ReadCache
facet:
operation: ReadVideoNew



module libiceDef{
exception FileAccessException
{
string reason;
};

interface iReadVideo
{
["amd", "cpp:array"] ByteSeq read(string name, int offset, int num)
throws FileAccessException;
};

};



server:

FILE* fp = fopen( name.c_str(), "rb" );
if(fp == 0)
{
FileAccessException ex;
ex.reason = "cannot open `" + name + "' for reading: " + strerror(errno);
cb->ice_exception(ex);
return;
}

pair<const Ice::Byte*, const Ice::Byte*> ret(0, 0);
if( fseek(fp, offset, SEEK_SET) != 0 )
{
cb->ice_response( ret );
fclose(fp);
return;
}
IceUtil::ScopedArray<Ice::Byte> bytes(new Ice::Byte[num]);
int r = fread( bytes.get(), 1, num, fp);
fclose(fp);

ret.first = bytes.get();
ret.second = ret.first + r;
cb->ice_response(ret);

client:

int rc = EXIT_SUCCESS;
try
{
int len = 1000*1024;
FILE *fp = fopen( dest_file.c_str(), "wb" );
int offset = 0;
IceUtil::Time start = IceUtil::Time::now();
//2007-10-10
libiceDef::ByteSeq data;
while( 1 )
{
data = _c->read( src_file, offset, len ); //ReadVideo

if( data.size() == 0 )
{
break;
}

if( fwrite( &data[0], 1, data.size(), fp ) != data.size() )
{
cerr << "error writing: " << strerror(errno) << endl;
rc = EXIT_FAILURE;
}
cout << __FILE__ << " offset=" << offset << endl;
offset += data.size();
/*data.resize(0);
data.clear();*/
libiceDef::ByteSeq().swap( data );
cout << "data size=" << data.size() << endl;
}
libiceDef::ByteSeq().swap( data );

fclose( fp );

IceUtil::Time tm = IceUtil::Time::now() - start;
double mbs = ( offset/(1024.0 * 1024.0) ) / tm.toSecondsDouble();
cout << "throughput " << mbs << " MB/s" << endl;
}
catch( const FileAccessException &e )
{
cerr << "FileAccessException: " << e.reason << endl;
rc = EXIT_FAILURE;
}
return rc;

Looks like you are trying to allocate more memory than your process is allowed to have. Please this FAQ for some pointers on how to implement file transfer.

Cheers,

Michi.

It would also be a good idea to read Matthew's newsletter article on optimizing file transfer here.

Dwayne

dwayne wrote: »

It would also be a good idea to read Matthew's newsletter article on optimizing file transfer here.

Dwayne

my program is base on the Matthew's newsletter article to develop.

If you haven't worked out what is causing your problems and you still need help the easiest way is to post a complete self contained compilable example that demonstrates your problem.