[Python-checkins] cpython: fix for old kernels which don't have epoll_create1

Tue Dec 27 22:36:43 CET 2011

http://hg.python.org/cpython/rev/0f9276411dce
changeset: 74187:0f9276411dce
user: Benjamin Peterson <benjamin at python.org>
date: Tue Dec 27 15:36:32 2011 -0600
summary:
 fix for old kernels which don't have epoll_create1
files:
 Modules/selectmodule.c | 12 +++++++++---
 configure | 29 +++++++++++++++++++++++++++--
 configure.in | 6 ++++++
 pyconfig.h.in | 3 +++
 4 files changed, 45 insertions(+), 5 deletions(-)

diff --git a/Modules/selectmodule.c b/Modules/selectmodule.c
--- a/Modules/selectmodule.c
+++ b/Modules/selectmodule.c
@@ -1087,7 +1087,7 @@
 }
 
 static PyObject *
-newPyEpoll_Object(PyTypeObject *type, int flags, SOCKET fd)
+newPyEpoll_Object(PyTypeObject *type, int sizehint, int flags, SOCKET fd)
 {
 pyEpoll_Object *self;
 
@@ -1098,7 +1098,11 @@
 
 if (fd == -1) {
 Py_BEGIN_ALLOW_THREADS
+#ifdef HAVE_EPOLL_CREATE1
 self->epfd = epoll_create1(flags);
+#else
+ self->epfd = epoll_create(sizehint);
+#endif
 Py_END_ALLOW_THREADS
 }
 else {
@@ -1127,7 +1131,7 @@
 return NULL;
 }
 
- return newPyEpoll_Object(type, flags, -1);
+ return newPyEpoll_Object(type, sizehint, flags, -1);
 }
 
 
@@ -1185,7 +1189,7 @@
 if (!PyArg_ParseTuple(args, "i:fromfd", &fd))
 return NULL;
 
- return newPyEpoll_Object((PyTypeObject*)cls, 0, fd);
+ return newPyEpoll_Object((PyTypeObject*)cls, FD_SETSIZE - 1, 0, fd);
 }
 
 PyDoc_STRVAR(pyepoll_fromfd_doc,
@@ -2213,7 +2217,9 @@
 PyModule_AddIntConstant(m, "EPOLLWRBAND", EPOLLWRBAND);
 PyModule_AddIntConstant(m, "EPOLLMSG", EPOLLMSG);
 
+#ifdef EPOLL_CLOEXEC
 PyModule_AddIntConstant(m, "EPOLL_CLOEXEC", EPOLL_CLOEXEC);
+#endif
 #endif /* HAVE_EPOLL */
 
 #ifdef HAVE_KQUEUE
diff --git a/configure b/configure
--- a/configure
+++ b/configure
@@ -9606,6 +9606,31 @@
 
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for epoll_create1" >&5
+$as_echo_n "checking for epoll_create1... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sys/epoll.h>
+int
+main ()
+{
+void *x=epoll_create1
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+$as_echo "#define HAVE_EPOLL_CREATE1 1" >>confdefs.h
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for kqueue" >&5
 $as_echo_n "checking for kqueue... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -14564,8 +14589,8 @@
 
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 # Files that config.status was made for.
-config_files="`echo $ac_config_files`"
-config_headers="`echo $ac_config_headers`"
+config_files="$ac_config_files"
+config_headers="$ac_config_headers"
 
 _ACEOF
 
diff --git a/configure.in b/configure.in
--- a/configure.in
+++ b/configure.in
@@ -2628,6 +2628,12 @@
 AC_MSG_RESULT(yes)],
 [AC_MSG_RESULT(no)
 ])
+AC_MSG_CHECKING(for epoll_create1)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/epoll.h>]], [[void *x=epoll_create1]])],
+ [AC_DEFINE(HAVE_EPOLL_CREATE1, 1, Define if you have the 'epoll_create1' function.)
+ AC_MSG_RESULT(yes)],
+ [AC_MSG_RESULT(no)
+])
 AC_MSG_CHECKING(for kqueue)
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
diff --git a/pyconfig.h.in b/pyconfig.h.in
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -196,6 +196,9 @@
 /* Define if you have the 'epoll' functions. */
 #undef HAVE_EPOLL
 
+/* Define if you have the 'epoll_create1' function. */
+#undef HAVE_EPOLL_CREATE1
+
 /* Define to 1 if you have the `erf' function. */
 #undef HAVE_ERF
 
-- 
Repository URL: http://hg.python.org/cpython
