Greetings, and thanks Vadim! Did a quick search and found this:
http://gcc.gnu.org/ml/libstdc++/2003-03/msg00304.html ============================================================================= Following doesn't cause problems on mingw32 _unless_ we include winsock.h or winsock2.h. +#ifdef FIONREAD + // Pipes and sockets. + int __num = 0; + int __r = ioctl(this->fd(), FIONREAD, &__num); + if (!__r && __num >= 0) + return __num; +#endif mingw does define FIONREAD (in winsock.h) but does not have ioctl. It does have winsock versions: ioctlsocket (a barebones Berkeley ioctl) and WSAIoctl which provides functionality similar to ioctl/fcntl. To be functional these require a call to an initilizer function WSAStartup, so we can't just #define ioctl ioctlsocket. I could probably write a _glibcpp_ioctl() wrapper function and add it as a an extra module to libgcc2 for mingw target. ============================================================================= and this: http://www.netperf.org/pipermail/netperf-talk/2007-February/000209.html ============================================================================= +/* + * Sets a socket to non-blocking operation. + */ +int +set_nonblock (SOCKET sock) +{ +#ifdef WIN32 + unsigned long flags = 1; + return (ioctlsocket(sock, FIONBIO, &flags) != SOCKET_ERROR); +#else + return (fcntl(sock, F_SETFL, O_NONBLOCK) != -1); +#endif +} +============================================================================= Linux does LISTEN_FOR_INPUT thusly: #undef LISTEN_FOR_INPUT #define LISTEN_FOR_INPUT(fp) \ do { int c = 0; \ if(((fp)->_IO_read_ptr >= (fp)->_IO_read_end) \ && (ioctl((fp)->_fileno, FIONREAD, &c),c<=0)) \ return 0;} while (0) Vadim, could you please try adding /* How to check for input */ #undef LISTEN_FOR_INPUT #define LISTEN_FOR_INPUT(fp) \ do { int c = 0; \ if(((fp)->_IO_read_ptr >= (fp)->_IO_read_end) \ && (ioctlsocket((fp)->_fileno, FIONREAD, &c),c<=0)) \ return 0;} while (0) to mingw.h? You may need to either include "winsock.h" and or "winsock2.h" in file.d. Thank you so much for your help here. If you know of a cross compiling environment in which I can test these things under Linux, or some remote mingw machine accessible via ssh, please let me know. Take care, ============================================================================= Camm Maguire writes: Greetings, and thanks Vadim! Does this mean that non-blocking io via fcntl does not work on mingw, or rather does it mean that the configure test below is failing erroneously? AC_MSG_CHECKING(check for listen using fcntl) AC_TRY_COMPILE([#include <stdio.h> #include <fcntl.h> ], [FILE *fp=fopen("configure.in","r"); int orig; orig = fcntl(fileno(fp), F_GETFL); if (! (orig & O_NONBLOCK )) return 0; ], [AC_DEFINE(LISTEN_USE_FCNTL) AC_MSG_RESULT(yes)], AC_MSG_RESULT(no)) Yes, this test fails. Configure log attached. With best regards, Vadim -- Vadim V. Zhytnikov <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> ============================================================================= _______________________________________________ Gcl-devel mailing list Gcl-devel@gnu.org http://lists.gnu.org/mailman/listinfo/gcl-devel
