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transfer file with Ice

zhongshizzhongshiz Member zhong shizengOrganization: the centural university for nationalitiesProject: the web news comment system of cgi
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;

Comments

  • michimichi Member Michi HenningOrganization: Triodia TechnologiesProject: I have a passing interest in Ice :-) ✭✭✭
    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.
  • dwaynedwayne St. John's, NewfoundlandMember Dwayne BooneOrganization: ZeroC, Inc.Project: Internet Communications Engine
    It would also be a good idea to read Matthew's newsletter article on optimizing file transfer here.

    Dwayne
  • zhongshizzhongshiz Member zhong shizengOrganization: the centural university for nationalitiesProject: the web news comment system of cgi
    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.
  • matthewmatthew NL, CanadaMember Matthew NewhookOrganization: ZeroC, Inc.Project: Internet Communications Engine ✭✭✭
    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.
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