mirror of
https://github.com/python/cpython
synced 2024-09-05 08:17:45 +00:00
Re-do the broken-nice() patch to break less platforms. Hopefully none :P
Also note that it isn't just Linux nice() that is broken: at least FreeBSD and BSDI also have this problem. os.nice() should probably just be emulated using getpriority()/setpriority(), if they are available, but I'll get to that later.
This commit is contained in:
Thomas Wouters
parent
3230d5c961
commit
e38b2f1f00
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@ -1110,6 +1110,12 @@ posix_mkdir(PyObject *self, PyObject *args)
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#ifdef HAVE_NICE
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#if defined(HAVE_BROKEN_NICE) && defined(HAVE_SYS_RESOURCE_H)
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#if defined(HAVE_GETPRIORITY) && !defined(PRIO_PROCESS)
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#include <sys/resource.h>
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#endif
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#endif
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static char posix_nice__doc__[] =
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"nice(inc) -> new_priority\n\
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Decrease the priority of process and return new priority.";
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@ -1124,8 +1130,8 @@ posix_nice(PyObject *self, PyObject *args)
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/* There are two flavours of 'nice': one that returns the new
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priority (as required by almost all standards out there) and the
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Linux one, which returns '0' on success and advices the use of
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getpriority() to get the new priority.
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Linux/FreeBSD/BSDI one, which returns '0' on success and advices
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the use of getpriority() to get the new priority.
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If we are of the nice family that returns the new priority, we
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need to clear errno before the call, and check if errno is filled
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@ -1134,7 +1140,7 @@ posix_nice(PyObject *self, PyObject *args)
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errno = 0;
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value = nice(increment);
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#ifdef HAVE_GETPRIORITY
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#if defined(HAVE_BROKEN_NICE) && defined(HAVE_GETPRIORITY)
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if (value == 0)
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value = getpriority(PRIO_PROCESS, 0);
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#endif
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@ -116,6 +116,9 @@
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/* Define as the size of the unicode type. */
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#undef Py_UNICODE_SIZE
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/* Define if nice() returns success/failure instead of the new priority. */
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#undef HAVE_BROKEN_NICE
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/* Define if malloc(0) returns a NULL pointer */
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#undef MALLOC_ZERO_RETURNS_NULL
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@ -175,6 +175,9 @@
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/* Define as the size of the unicode type. */
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#undef Py_UNICODE_SIZE
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/* Define if nice() returns success/failure instead of the new priority. */
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#undef HAVE_BROKEN_NICE
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/* Define if malloc(0) returns a NULL pointer */
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#undef MALLOC_ZERO_RETURNS_NULL
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@ -641,6 +644,9 @@
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/* Define if you have the <sys/param.h> header file. */
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#undef HAVE_SYS_PARAM_H
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/* Define if you have the <sys/resource.h> header file. */
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#undef HAVE_SYS_RESOURCE_H
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/* Define if you have the <sys/select.h> header file. */
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#undef HAVE_SYS_SELECT_H
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55
configure
vendored
55
configure
vendored
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@ -1,6 +1,6 @@
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#! /bin/sh
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# From configure.in Revision: 1.225
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# From configure.in Revision: 1.226
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# Guess values for system-dependent variables and create Makefiles.
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# Generated automatically using autoconf version 2.13
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@ -2074,7 +2074,7 @@ signal.h stdarg.h stddef.h stdlib.h thread.h unistd.h utime.h termios.h \
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sys/audioio.h sys/file.h sys/lock.h sys/modem.h db_185.h db.h \
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sys/param.h sys/select.h sys/socket.h sys/time.h sys/times.h \
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sys/un.h sys/utsname.h sys/wait.h pty.h libutil.h \
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ndbm.h db1/ndbm.h gdbm/ndbm.h
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ndbm.h db1/ndbm.h gdbm/ndbm.h sys/resource.h
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do
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ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
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echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
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@ -6876,6 +6876,51 @@ else
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fi
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echo $ac_n "checking for broken nice()""... $ac_c" 1>&6
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echo "configure:6881: checking for broken nice()" >&5
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if eval "test \"`echo '$''{'ac_cv_broken_nice'+set}'`\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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if test "$cross_compiling" = yes; then
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{ echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
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else
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cat > conftest.$ac_ext <<EOF
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#line 6890 "configure"
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#include "confdefs.h"
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int main()
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{
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int val1 = nice(1);
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if (val1 != -1 && val1 == nice(2))
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exit(0);
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exit(1);
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}
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EOF
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if { (eval echo configure:6902: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
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then
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ac_cv_broken_nice=yes
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else
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echo "configure: failed program was:" >&5
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cat conftest.$ac_ext >&5
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rm -fr conftest*
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ac_cv_broken_nice=no
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fi
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rm -fr conftest*
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fi
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fi
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echo "$ac_t""$ac_cv_broken_nice" 1>&6
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if test "$ac_cv_broken_nice" = yes
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then
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cat >> confdefs.h <<\EOF
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#define HAVE_BROKEN_NICE 1
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EOF
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fi
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# THIS MUST BE LAST, IT CAN BREAK OTHER TESTS!
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# Add sys/socket.h to confdefs.h
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cat >> confdefs.h <<\EOF
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@ -6884,12 +6929,12 @@ cat >> confdefs.h <<\EOF
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#endif
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EOF
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echo $ac_n "checking for socklen_t""... $ac_c" 1>&6
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echo "configure:6888: checking for socklen_t" >&5
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echo "configure:6933: checking for socklen_t" >&5
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if eval "test \"`echo '$''{'ac_cv_type_socklen_t'+set}'`\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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cat > conftest.$ac_ext <<EOF
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#line 6893 "configure"
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#line 6938 "configure"
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#include "confdefs.h"
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#include <sys/types.h>
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#if STDC_HEADERS
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@ -6938,7 +6983,7 @@ done
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SRCDIRS="Parser Grammar Objects Python Modules"
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echo $ac_n "checking for build directories""... $ac_c" 1>&6
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echo "configure:6942: checking for build directories" >&5
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echo "configure:6987: checking for build directories" >&5
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for dir in $SRCDIRS; do
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if test ! -d $dir; then
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mkdir $dir
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19
configure.in
19
configure.in
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@ -545,7 +545,7 @@ signal.h stdarg.h stddef.h stdlib.h thread.h unistd.h utime.h termios.h \
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sys/audioio.h sys/file.h sys/lock.h sys/modem.h db_185.h db.h \
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sys/param.h sys/select.h sys/socket.h sys/time.h sys/times.h \
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sys/un.h sys/utsname.h sys/wait.h pty.h libutil.h \
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ndbm.h db1/ndbm.h gdbm/ndbm.h)
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ndbm.h db1/ndbm.h gdbm/ndbm.h sys/resource.h)
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AC_HEADER_DIRENT
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# checks for typedefs
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@ -1671,6 +1671,23 @@ fi
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AC_CHECK_LIB(readline, rl_completion_matches,
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AC_DEFINE(HAVE_RL_COMPLETION_MATCHES), , -ltermcap)
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AC_MSG_CHECKING(for broken nice())
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AC_CACHE_VAL(ac_cv_broken_nice, [
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AC_TRY_RUN([
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int main()
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{
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int val1 = nice(1);
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if (val1 != -1 && val1 == nice(2))
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exit(0);
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exit(1);
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}
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],ac_cv_broken_nice=yes, ac_cv_broken_nice=no)])
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AC_MSG_RESULT($ac_cv_broken_nice)
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if test "$ac_cv_broken_nice" = yes
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then
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AC_DEFINE(HAVE_BROKEN_NICE)
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fi
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# THIS MUST BE LAST, IT CAN BREAK OTHER TESTS!
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# Add sys/socket.h to confdefs.h
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cat >> confdefs.h <<\EOF
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