Hello,
I have a multi-threaded application that parses in memory PDFs. At first I used
buffer->PdfMemDocument for reading and OutputDevice(ostream)-> buffer to write
to memory but i keep getting a race condition on the stream (even tough I have
separate mem documents, something with the imbue thingy). So I've written a
class that inherits PdfMemDocument and includes a function that writes to a
buffer, same way the normal write works, except at the end I call
writer.writetobuffer(..,..). The problem appears when I parse and write a large
file (~19M). When it writes it to the buffer i get out-of-memory error. I
traced it back to the output device and it seems the position has reached the
end of the buffer in outputdevice. Is there any other initialization i have to
do to get write-to-buffer to work?
My code looks like this.
size_t write(char ** pp)
{
PdfWriter wr(&(this->GetObjects()),this->GetTrailer());
wr.SetPdfVersion(this->GetPdfVersion());
wr.SetWriteMode(ePdfWriteMode_Compact);
size_t wl;
if (this->GetEncrypted())
wr.SetEncrypted(*(this->GetEncrypt()));
try{
wr.WriteToBuffer(pp,&wl);
}
catch(PDFError &e){
e.PrintErrorMsg();
}
}
PoDoFo is out of memory
CallStack:
#0 ......PdfWriter.cpp:163
#1.......PdfOutputDevice.cpp:209
podofo version 0.9.1
<<Ignore compilation/syntax errors this is not copy-paste>>
One question why is write-to-buffer writing twice? once in local variable
device, and after that in buffer output device memDevice(from where i get my
buffer). Is it writing just to get the size of the buffer? Isn't it a bit
redundant? Or am I getting it wrong?
The program ran fine when I used the ostream except for the race condition
(locking the write gave me heavy performance penalties). The program is very
time sensitive.
Thank you,
Lucian.------------------------------------------------------------------------------
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