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diff --git a/docs/KNOWN_BUGS b/docs/KNOWN_BUGS index b27dc7bec..da605032d 100644 --- a/docs/KNOWN_BUGS +++ b/docs/KNOWN_BUGS @@ -55,63 +55,3 @@ may have been fixed since this was written! and havoc is what happens. More details on this is found in this libcurl mailing list thread: http://curl.haxx.se/mail/lib-2002-08/0000.html - ------------------------------------------------------------------------------- - -Q: My program blows up when I run lots of curl_easy_perform() calls on a -single thread -Q: My program dies when a single thread re-enters the win32 select() call -via curl_easy_perform() -Q: --- add your own flavour here --- - -Single Threaded Re-Entracy --------------------------- - -There is a glitch / trick to using cURL on Win32 related to re-entrancy. -This experience was gained on verion 7.9.4 using Windows NT SP3 in a banking -environment (just in case you wanted to know). - -If you have already called curl_easy_perform(), and *somehow* you cause your -single thread of execution to make another call to curl_easy_perform() - the -windows socket() call used to create a new socket for the second connection -can return with 10044 / 10043 error codes. - -The WSA errors we experienced are: -WSAEPROTONOSUPPORT -(10043) -Protocol not supported. -The requested protocol has not been configured into the system, or no -implementation for it exists. For example, a socket call requests a -SOCK_DGRAM socket, but specifies a stream protocol. - -WSAESOCKTNOSUPPORT -(10044) -Socket type not supported. -The support for the specified socket type does not exist in this address -family. For example, the optional type SOCK_RAW might be selected in a -socket call, and the implementation does not support SOCK_RAW sockets at -all. - -We have experienced this by creating a timer that ticks every 20ms, and on -the tick making a curl_easy_perform() call. The call usually completed in -about 300ms. And we expected (before this test) that the timer would NOT be -fired during a call to curl_easy_perform(), howvever, while the first -curl_easy_perform() is running a tick *is* fired by the windows API somehow, -and we then call curl_easy_perform() again - thus single threaded -re-entrancy is achieved. - -Notes: -* We made sure that a new CURL structure was being used for each -curl_easy_perform() request, and that the curl_global_init() had been called -beforehand. -* I'm happy to answer any questions about this problem to try to track it -down. -* Once the socket() call started failing, there is no hope - it never works -again. -* Slowing the timer down to give each request enough time to complete solves -this problem completely. - -If anyone has the source code to the WinNT implementation of socket() and -can figure out WHY this can occur, more tracing can be performed. - - John Clayton <John.Clayton at barclayscapital.com> |