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fd-setsize-test-20081021

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LICENSE BSD

a test so we can deal with platforms which don't honor FD_SETSIZE
This commit is contained in:
Derrick Brashear 2008-10-21 19:36:35 +00:00
parent 9bca8ce22a
commit a7a1846ab7
1 changed files with 106 additions and 0 deletions
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106
src/cf/fdsetsize.m4 Normal file
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@ -0,0 +1,106 @@
AC_DEFUN([FD_SET_OBEYS_FD_SETSIZE], [
AC_MSG_CHECKING(for default FD_SETSIZE)
AC_CACHE_VAL(ac_cv_default_fdsetsize,
[
AC_TRY_RUN(
changequote(<<, >>)dnl
<<
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
int main(int argc, char *argv[])
{
FILE *fp;
int ac_cv_default_fdsetsize;
#if defined(FD_SETSIZE)
ac_cv_default_fdsetsize = FD_SETSIZE;
#else
ac_cv_default_fdsetsize = (sizeof(fd_set)*8);
#endif
if ((fp = fopen("conftestval", "w")) == NULL)
exit(1);
fprintf(fp, "%d\n", ac_cv_default_fdsetsize);
fclose(fp);
exit(0);
}
>>
changequote([, ])dnl
,
ac_cv_default_fdsetsize=`cat conftestval`,
ac_cv_default_fdsetsize=-1,
ac_cv_default_fdsetsize=1024
)
AC_MSG_RESULT([$ac_cv_default_fdsetsize])
])
AC_MSG_CHECKING(for default fd_set size)
AC_CACHE_VAL(ac_cv_default_fd_set_size,
[
AC_TRY_RUN(
changequote(<<, >>)dnl
<<
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
int main(int argc, char *argv[])
{
FILE *fp;
int ac_cv_default_fd_set_size;
ac_cv_default_fd_set_size = (sizeof(fd_set));
if ((fp = fopen("conftestval", "w")) == NULL)
exit(1);
fprintf(fp, "%d\n", ac_cv_default_fd_set_size);
fclose(fp);
exit(0);
}
>>
changequote([, ])dnl
,
ac_cv_default_fd_set_size=`cat conftestval`,
ac_cv_default_fd_set_size=-1,
ac_cv_default_fd_set_size=128
)
AC_MSG_RESULT([$ac_cv_default_fd_set_size])
])
AC_MSG_CHECKING(for sizeof fd_set obeying FD_SETSIZE)
AC_CACHE_VAL(ac_cv_fd_set_size_obeys,
[
save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS -DORIG_FD_SETSIZE=$ac_cv_default_fdsetsize -DORIG_fd_set_size=$ac_cv_default_fd_set_size"
AC_TRY_RUN([
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#if (ORIG_FD_SETSIZE < 2048)
#define FD_SETSIZE 2048
#define __FD_SETSIZE 2048
#else
#define FD_SETSIZE 1024
#define __FD_SETSIZE 1024
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
int main() {
if ((ORIG_fd_set_size < 0) || (ORIG_FD_SETSIZE < 0))
exit(1);
exit((sizeof(fd_set) == ORIG_fd_set_size) ? 1 : 0);
}
],
ac_cv_fd_set_size_obeys=yes,
ac_cv_fd_set_size_obeys=no,
ac_cv_fd_set_size_obeys=yes)
CPPFLAGS=$save_CPPFLAGS
AC_MSG_RESULT([$ac_cv_fd_set_size_obeys])
])
])