Merged revisions 61846-61847 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk ........ r61846 | martin.v.loewis | 2008-03-24 13:57:53 +0100 (Mo, 24 Mär 2008) | 2 lines Install 2to3 script. ........ r61847 | martin.v.loewis | 2008-03-24 14:31:16 +0100 (Mo, 24 Mär 2008) | 2 lines Patch #2240: Implement signal.setitimer and signal.getitimer. ........
This commit is contained in:
Martin v. Löwis
parent
6cf49cf106
commit
823725e93c
|
|
@ -39,12 +39,13 @@ rules for working with signals and their handlers:
|
|||
* Some care must be taken if both signals and threads are used in the same
|
||||
program. The fundamental thing to remember in using signals and threads
|
||||
simultaneously is: always perform :func:`signal` operations in the main thread
|
||||
of execution. Any thread can perform an :func:`alarm`, :func:`getsignal`, or
|
||||
:func:`pause`; only the main thread can set a new signal handler, and the main
|
||||
thread will be the only one to receive signals (this is enforced by the Python
|
||||
:mod:`signal` module, even if the underlying thread implementation supports
|
||||
sending signals to individual threads). This means that signals can't be used
|
||||
as a means of inter-thread communication. Use locks instead.
|
||||
of execution. Any thread can perform an :func:`alarm`, :func:`getsignal`,
|
||||
:func:`pause`, :func:`setitimer` or :func:`getitimer`; only the main thread
|
||||
can set a new signal handler, and the main thread will be the only one to
|
||||
receive signals (this is enforced by the Python :mod:`signal` module, even
|
||||
if the underlying thread implementation supports sending signals to
|
||||
individual threads). This means that signals can't be used as a means of
|
||||
inter-thread communication. Use locks instead.
|
||||
|
||||
The variables defined in the :mod:`signal` module are:
|
||||
|
||||
|
|
@ -78,6 +79,36 @@ The variables defined in the :mod:`signal` module are:
|
|||
|
||||
One more than the number of the highest signal number.
|
||||
|
||||
|
||||
.. data:: ITIMER_REAL
|
||||
|
||||
Decrements interval timer in real time, and delivers SIGALRM upon expiration.
|
||||
|
||||
|
||||
.. data:: ITIMER_VIRTUAL
|
||||
|
||||
Decrements interval timer only when the process is executing, and delivers
|
||||
SIGVTALRM upon expiration.
|
||||
|
||||
|
||||
.. data:: ITIMER_PROF
|
||||
|
||||
Decrements interval timer both when the process executes and when the
|
||||
system is executing on behalf of the process. Coupled with ITIMER_VIRTUAL,
|
||||
this timer is usually used to profile the time spent by the application
|
||||
in user and kernel space. SIGPROF is delivered upon expiration.
|
||||
|
||||
|
||||
The :mod:`signal` module defines one exception:
|
||||
|
||||
.. exception:: ItimerError
|
||||
|
||||
Raised to signal an error from the underlying :func:`setitimer` or
|
||||
:func:`getitimer` implementation. Expect this error if an invalid
|
||||
interval timer or a negative time is passed to :func:`setitimer`.
|
||||
This error is a subtype of :exc:`IOError`.
|
||||
|
||||
|
||||
The :mod:`signal` module defines the following functions:
|
||||
|
||||
|
||||
|
|
@ -110,6 +141,29 @@ The :mod:`signal` module defines the following functions:
|
|||
:manpage:`signal(2)`.)
|
||||
|
||||
|
||||
.. function:: setitimer(which, seconds[, interval])
|
||||
|
||||
Sets given itimer (one of :const:`signal.ITIMER_REAL`,
|
||||
:const:`signal.ITIMER_VIRTUAL` or :const:`signal.ITIMER_PROF`) especified
|
||||
by *which* to fire after *seconds* (float is accepted, different from
|
||||
:func:`alarm`) and after that every *interval* seconds. The interval
|
||||
timer specified by *which* can be cleared by setting seconds to zero.
|
||||
|
||||
The old values are returned as a tuple: (delay, interval).
|
||||
|
||||
Attempting to pass an invalid interval timer will cause a
|
||||
:exc:`ItimerError`.
|
||||
|
||||
.. versionadded:: 2.6
|
||||
|
||||
|
||||
.. function:: getitimer(which)
|
||||
|
||||
Returns current value of a given itimer especified by *which*.
|
||||
|
||||
.. versionadded:: 2.6
|
||||
|
||||
|
||||
.. function:: set_wakeup_fd(fd)
|
||||
|
||||
Set the wakeup fd to *fd*. When a signal is received, a ``'\0'`` byte is
|
||||
|
|
@ -124,7 +178,6 @@ The :mod:`signal` module defines the following functions:
|
|||
exception to be raised.
|
||||
|
||||
|
||||
|
||||
.. function:: siginterrupt(signalnum, flag)
|
||||
|
||||
Change system call restart behaviour: if *flag* is :const:`False`, system calls
|
||||
|
|
|
|||
|
|
@ -258,9 +258,93 @@ class SiginterruptTest(unittest.TestCase):
|
|||
i=self.readpipe_interrupted(lambda: signal.siginterrupt(self.signum, 0))
|
||||
self.assertEquals(i, False)
|
||||
|
||||
class ItimerTest(unittest.TestCase):
|
||||
def setUp(self):
|
||||
self.hndl_called = False
|
||||
self.hndl_count = 0
|
||||
self.itimer = None
|
||||
|
||||
def tearDown(self):
|
||||
if self.itimer is not None: # test_itimer_exc doesn't change this attr
|
||||
# just ensure that itimer is stopped
|
||||
signal.setitimer(self.itimer, 0)
|
||||
|
||||
def sig_alrm(self, *args):
|
||||
self.hndl_called = True
|
||||
if test_support.verbose:
|
||||
print("SIGALRM handler invoked", args)
|
||||
|
||||
def sig_vtalrm(self, *args):
|
||||
self.hndl_called = True
|
||||
|
||||
if self.hndl_count > 3:
|
||||
# it shouldn't be here, because it should have been disabled.
|
||||
raise signal.ItimerError("setitimer didn't disable ITIMER_VIRTUAL "
|
||||
"timer.")
|
||||
elif self.hndl_count == 3:
|
||||
# disable ITIMER_VIRTUAL, this function shouldn't be called anymore
|
||||
signal.setitimer(signal.ITIMER_VIRTUAL, 0)
|
||||
if test_support.verbose:
|
||||
print("last SIGVTALRM handler call")
|
||||
|
||||
self.hndl_count += 1
|
||||
|
||||
if test_support.verbose:
|
||||
print("SIGVTALRM handler invoked", args)
|
||||
|
||||
def sig_prof(self, *args):
|
||||
self.hndl_called = True
|
||||
signal.setitimer(signal.ITIMER_PROF, 0)
|
||||
|
||||
if test_support.verbose:
|
||||
print("SIGPROF handler invoked", args)
|
||||
|
||||
def test_itimer_exc(self):
|
||||
# XXX I'm assuming -1 is an invalid itimer, but maybe some platform
|
||||
# defines it ?
|
||||
self.assertRaises(signal.ItimerError, signal.setitimer, -1, 0)
|
||||
# negative time
|
||||
self.assertRaises(signal.ItimerError, signal.setitimer,
|
||||
signal.ITIMER_REAL, -1)
|
||||
|
||||
def test_itimer_real(self):
|
||||
self.itimer = signal.ITIMER_REAL
|
||||
signal.signal(signal.SIGALRM, self.sig_alrm)
|
||||
signal.setitimer(self.itimer, 1.0)
|
||||
if test_support.verbose:
|
||||
print("\ncall pause()...")
|
||||
signal.pause()
|
||||
|
||||
self.assertEqual(self.hndl_called, True)
|
||||
|
||||
def test_itimer_virtual(self):
|
||||
self.itimer = signal.ITIMER_VIRTUAL
|
||||
signal.signal(signal.SIGVTALRM, self.sig_vtalrm)
|
||||
signal.setitimer(self.itimer, 0.3, 0.2)
|
||||
|
||||
for i in range(100000000):
|
||||
if signal.getitimer(self.itimer) == (0.0, 0.0):
|
||||
break # sig_vtalrm handler stopped this itimer
|
||||
|
||||
# virtual itimer should be (0.0, 0.0) now
|
||||
self.assertEquals(signal.getitimer(self.itimer), (0.0, 0.0))
|
||||
# and the handler should have been called
|
||||
self.assertEquals(self.hndl_called, True)
|
||||
|
||||
def test_itimer_prof(self):
|
||||
self.itimer = signal.ITIMER_PROF
|
||||
signal.signal(signal.SIGPROF, self.sig_prof)
|
||||
signal.setitimer(self.itimer, 0.2)
|
||||
|
||||
for i in range(100000000):
|
||||
if signal.getitimer(self.itimer) == (0.0, 0.0):
|
||||
break # sig_prof handler stopped this itimer
|
||||
|
||||
self.assertEqual(self.hndl_called, True)
|
||||
|
||||
def test_main():
|
||||
test_support.run_unittest(BasicSignalTests, InterProcessSignalTests,
|
||||
WakeupSignalTests, SiginterruptTest)
|
||||
WakeupSignalTests, SiginterruptTest, ItimerTest)
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
|
|
|
|||
|
|
@ -531,6 +531,7 @@ Fran
|
|||
Zach Pincus
|
||||
Michael Piotrowski
|
||||
Antoine Pitrou
|
||||
Guilherme Polo
|
||||
Michael Pomraning
|
||||
Iustin Pop
|
||||
John Popplewell
|
||||
|
|
|
|||
|
|
@ -13,6 +13,7 @@
|
|||
#include <signal.h>
|
||||
|
||||
#include <sys/stat.h>
|
||||
#include <sys/time.h>
|
||||
|
||||
#ifndef SIG_ERR
|
||||
#define SIG_ERR ((PyOS_sighandler_t)(-1))
|
||||
|
|
@ -93,6 +94,49 @@ static PyObject *IntHandler;
|
|||
|
||||
static PyOS_sighandler_t old_siginthandler = SIG_DFL;
|
||||
|
||||
#ifdef HAVE_GETITIMER
|
||||
static PyObject *ItimerError;
|
||||
|
||||
/* auxiliary functions for setitimer/getitimer */
|
||||
static void
|
||||
timeval_from_double(double d, struct timeval *tv)
|
||||
{
|
||||
tv->tv_sec = floor(d);
|
||||
tv->tv_usec = fmod(d, 1.0) * 1000000.0;
|
||||
}
|
||||
|
||||
static inline double
|
||||
double_from_timeval(struct timeval *tv)
|
||||
{
|
||||
return tv->tv_sec + (double)(tv->tv_usec / 1000000.0);
|
||||
}
|
||||
|
||||
static PyObject *
|
||||
itimer_retval(struct itimerval *iv)
|
||||
{
|
||||
PyObject *r, *v;
|
||||
|
||||
r = PyTuple_New(2);
|
||||
if (r == NULL)
|
||||
return NULL;
|
||||
|
||||
if(!(v = PyFloat_FromDouble(double_from_timeval(&iv->it_value)))) {
|
||||
Py_DECREF(r);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
PyTuple_SET_ITEM(r, 0, v);
|
||||
|
||||
if(!(v = PyFloat_FromDouble(double_from_timeval(&iv->it_interval)))) {
|
||||
Py_DECREF(r);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
PyTuple_SET_ITEM(r, 1, v);
|
||||
|
||||
return r;
|
||||
}
|
||||
#endif
|
||||
|
||||
static PyObject *
|
||||
signal_default_int_handler(PyObject *self, PyObject *args)
|
||||
|
|
@ -347,10 +391,76 @@ PySignal_SetWakeupFd(int fd)
|
|||
}
|
||||
|
||||
|
||||
#ifdef HAVE_SETITIMER
|
||||
static PyObject *
|
||||
signal_setitimer(PyObject *self, PyObject *args)
|
||||
{
|
||||
double first;
|
||||
double interval = 0;
|
||||
int which;
|
||||
struct itimerval new, old;
|
||||
|
||||
if(!PyArg_ParseTuple(args, "id|d:setitimer", &which, &first, &interval))
|
||||
return NULL;
|
||||
|
||||
timeval_from_double(first, &new.it_value);
|
||||
timeval_from_double(interval, &new.it_interval);
|
||||
/* Let OS check "which" value */
|
||||
if (setitimer(which, &new, &old) != 0) {
|
||||
PyErr_SetFromErrno(ItimerError);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return itimer_retval(&old);
|
||||
}
|
||||
|
||||
PyDoc_STRVAR(setitimer_doc,
|
||||
"setitimer(which, seconds[, interval])\n\
|
||||
\n\
|
||||
Sets given itimer (one of ITIMER_REAL, ITIMER_VIRTUAL\n\
|
||||
or ITIMER_PROF) to fire after value seconds and after\n\
|
||||
that every interval seconds.\n\
|
||||
The itimer can be cleared by setting seconds to zero.\n\
|
||||
\n\
|
||||
Returns old values as a tuple: (delay, interval).");
|
||||
#endif
|
||||
|
||||
|
||||
#ifdef HAVE_GETITIMER
|
||||
static PyObject *
|
||||
signal_getitimer(PyObject *self, PyObject *args)
|
||||
{
|
||||
int which;
|
||||
struct itimerval old;
|
||||
|
||||
if (!PyArg_ParseTuple(args, "i:getitimer", &which))
|
||||
return NULL;
|
||||
|
||||
if (getitimer(which, &old) != 0) {
|
||||
PyErr_SetFromErrno(ItimerError);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return itimer_retval(&old);
|
||||
}
|
||||
|
||||
PyDoc_STRVAR(getitimer_doc,
|
||||
"getitimer(which)\n\
|
||||
\n\
|
||||
Returns current value of given itimer.");
|
||||
#endif
|
||||
|
||||
|
||||
/* List of functions defined in the module */
|
||||
static PyMethodDef signal_methods[] = {
|
||||
#ifdef HAVE_ALARM
|
||||
{"alarm", signal_alarm, METH_VARARGS, alarm_doc},
|
||||
#endif
|
||||
#ifdef HAVE_SETITIMER
|
||||
{"setitimer", signal_setitimer, METH_VARARGS, setitimer_doc},
|
||||
#endif
|
||||
#ifdef HAVE_GETITIMER
|
||||
{"getitimer", signal_getitimer, METH_VARARGS, getitimer_doc},
|
||||
#endif
|
||||
{"signal", signal_signal, METH_VARARGS, signal_doc},
|
||||
{"getsignal", signal_getsignal, METH_VARARGS, getsignal_doc},
|
||||
|
|
@ -374,19 +484,32 @@ PyDoc_STRVAR(module_doc,
|
|||
Functions:\n\
|
||||
\n\
|
||||
alarm() -- cause SIGALRM after a specified time [Unix only]\n\
|
||||
setitimer() -- cause a signal (described below) after a specified\n\
|
||||
float time and the timer may restart then [Unix only]\n\
|
||||
getitimer() -- get current value of timer [Unix only]\n\
|
||||
signal() -- set the action for a given signal\n\
|
||||
getsignal() -- get the signal action for a given signal\n\
|
||||
pause() -- wait until a signal arrives [Unix only]\n\
|
||||
default_int_handler() -- default SIGINT handler\n\
|
||||
\n\
|
||||
Constants:\n\
|
||||
\n\
|
||||
signal constants:\n\
|
||||
SIG_DFL -- used to refer to the system default handler\n\
|
||||
SIG_IGN -- used to ignore the signal\n\
|
||||
NSIG -- number of defined signals\n\
|
||||
\n\
|
||||
SIGINT, SIGTERM, etc. -- signal numbers\n\
|
||||
\n\
|
||||
itimer constants:\n\
|
||||
ITIMER_REAL -- decrements in real time, and delivers SIGALRM upon\n\
|
||||
expiration\n\
|
||||
ITIMER_VIRTUAL -- decrements only when the process is executing,\n\
|
||||
and delivers SIGVTALRM upon expiration\n\
|
||||
ITIMER_PROF -- decrements both when the process is executing and\n\
|
||||
when the system is executing on behalf of the process.\n\
|
||||
Coupled with ITIMER_VIRTUAL, this timer is usually\n\
|
||||
used to profile the time spent by the application\n\
|
||||
in user and kernel space. SIGPROF is delivered upon\n\
|
||||
expiration.\n\
|
||||
\n\n\
|
||||
*** IMPORTANT NOTICE ***\n\
|
||||
A signal handler function is called with two arguments:\n\
|
||||
the first is the signal number, the second is the interrupted stack frame.");
|
||||
|
|
@ -639,6 +762,29 @@ initsignal(void)
|
|||
PyDict_SetItemString(d, "SIGINFO", x);
|
||||
Py_XDECREF(x);
|
||||
#endif
|
||||
|
||||
#ifdef ITIMER_REAL
|
||||
x = PyLong_FromLong(ITIMER_REAL);
|
||||
PyDict_SetItemString(d, "ITIMER_REAL", x);
|
||||
Py_DECREF(x);
|
||||
#endif
|
||||
#ifdef ITIMER_VIRTUAL
|
||||
x = PyLong_FromLong(ITIMER_VIRTUAL);
|
||||
PyDict_SetItemString(d, "ITIMER_VIRTUAL", x);
|
||||
Py_DECREF(x);
|
||||
#endif
|
||||
#ifdef ITIMER_PROF
|
||||
x = PyLong_FromLong(ITIMER_PROF);
|
||||
PyDict_SetItemString(d, "ITIMER_PROF", x);
|
||||
Py_DECREF(x);
|
||||
#endif
|
||||
|
||||
#if defined (HAVE_SETITIMER) || defined (HAVE_GETITIMER)
|
||||
ItimerError = PyErr_NewException("signal.ItimerError",
|
||||
PyExc_IOError, NULL);
|
||||
PyDict_SetItemString(d, "ItimerError", ItimerError);
|
||||
#endif
|
||||
|
||||
if (!PyErr_Occurred())
|
||||
return;
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,5 @@
|
|||
#!/usr/bin/env python
|
||||
from lib2to3 import refactor
|
||||
import sys
|
||||
|
||||
sys.exit(refactor.main())
|
||||
|
|
@ -1,5 +1,5 @@
|
|||
#! /bin/sh
|
||||
# From configure.in Revision: 61306 .
|
||||
# From configure.in Revision: 61728 .
|
||||
# Guess values for system-dependent variables and create Makefiles.
|
||||
# Generated by GNU Autoconf 2.61 for python 3.0.
|
||||
#
|
||||
|
|
@ -15719,8 +15719,10 @@ echo "${ECHO_T}MACHDEP_OBJS" >&6; }
|
|||
|
||||
|
||||
|
||||
for ac_func in alarm bind_textdomain_codeset chown clock confstr \
|
||||
ctermid execv fchmod fchown fork fpathconf ftime ftruncate \
|
||||
|
||||
|
||||
for ac_func in alarm setitimer getitimer bind_textdomain_codeset chown \
|
||||
clock confstr ctermid execv fchmod fchown fork fpathconf ftime ftruncate \
|
||||
gai_strerror getgroups getlogin getloadavg getpeername getpgid getpid \
|
||||
getpriority getpwent getspnam getspent getsid getwd \
|
||||
kill killpg lchmod lchown lstat mkfifo mknod mktime \
|
||||
|
|
|
|||
|
|
@ -2274,8 +2274,8 @@ fi
|
|||
AC_MSG_RESULT(MACHDEP_OBJS)
|
||||
|
||||
# checks for library functions
|
||||
AC_CHECK_FUNCS(alarm bind_textdomain_codeset chown clock confstr \
|
||||
ctermid execv fchmod fchown fork fpathconf ftime ftruncate \
|
||||
AC_CHECK_FUNCS(alarm setitimer getitimer bind_textdomain_codeset chown \
|
||||
clock confstr ctermid execv fchmod fchown fork fpathconf ftime ftruncate \
|
||||
gai_strerror getgroups getlogin getloadavg getpeername getpgid getpid \
|
||||
getpriority getpwent getspnam getspent getsid getwd \
|
||||
kill killpg lchmod lchown lstat mkfifo mknod mktime \
|
||||
|
|
|
|||
|
|
@ -240,6 +240,9 @@
|
|||
/* Define this if you have the 6-arg version of gethostbyname_r(). */
|
||||
#undef HAVE_GETHOSTBYNAME_R_6_ARG
|
||||
|
||||
/* Define to 1 if you have the `getitimer' function. */
|
||||
#undef HAVE_GETITIMER
|
||||
|
||||
/* Define to 1 if you have the `getloadavg' function. */
|
||||
#undef HAVE_GETLOADAVG
|
||||
|
||||
|
|
@ -501,6 +504,9 @@
|
|||
/* Define if you have the 'setgroups' function. */
|
||||
#undef HAVE_SETGROUPS
|
||||
|
||||
/* Define to 1 if you have the `setitimer' function. */
|
||||
#undef HAVE_SETITIMER
|
||||
|
||||
/* Define to 1 if you have the `setlocale' function. */
|
||||
#undef HAVE_SETLOCALE
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue