git.m6w6.name Git - awesomized/libmemcached/blob - m4/eagain.m4

   1 #
   2 # Some platforms define EWOULDBLOCK == EAGAIN, causing our switch for error
   3 # codes to be illegal (POSIX.1-2001 allows both return codes from recv, so
   4 # we need to test both if they differ...)
   5 #
   6 AC_DEFUN([DETECT_EAGAIN],
   7 [
   8     AC_CACHE_CHECK([if EWOULDBLOCK == EAGAIN],[av_cv_eagain_ewouldblock],
   9         [AC_TRY_COMPILE([
  10 #include <errno.h>
  11                         ], [
  12 int error = EAGAIN;
  13 switch (error)
  14 {
  15   case EAGAIN:
  16   case EWOULDBLOCK:
  17        error = 1;
  18        break;
  19   default:
  20        error = 0;
  21 }
  22                         ],
  23                         [ av_cv_eagain_ewouldblock=no ],
  24                         [ av_cv_eagain_ewouldblock=yes ])
  25         ])
  26     AS_IF([test "x$ac_cv_eagain_ewouldblock" = "xyes"],[
  27           AC_DEFINE([USE_EAGAIN], [1], [Define to true if you need to test for eagain])])
  28 ])