Hi all,
here is the SAGE signal handling code, graciously donated by William Stein.
I'd suggest putting (with any modifications to adapt it to numpy conventions)
this into the actual numpy headers, so that not only all of our
auto-generation tools (f2py, weave) can use it, but so that it also becomes
trivial for end-users to user the same macros in their own code without doing
anything additional.
Regards,
f
-------- Original Message --------
Subject: Re: Signal handling
Date: Fri, 18 Aug 2006 21:15:38 +0000
From: William Stein <[EMAIL PROTECTED]>
To: Fernando Perez <[EMAIL PROTECTED]>
References: <[EMAIL PROTECTED]>
Here you are (see attached). Let me know if you have any trouble
with gmail mangling
the attachment.
On 8/18/06, Fernando Perez <[EMAIL PROTECTED]> wrote:
Hi William,
could you please send me 'officially' an email with the interrupt.{c,h} files
and a notice of them being BSD licensed ? With that, I can then forward them
to the numpy list and work on their inclusion tomorrow.
--
William Stein
Associate Professor of Mathematics
University of Washington
/*
Interrupt handling for extension code (header file)
Copyright (c) 2006, William Stein, under "The BSD License" (see below).
All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the
following conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials
provided with the distribution.
* Neither the name of the SAGE Foundation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
#include "interrupt.h"
void sig_handle(int n) {
signal(SIGINT, last_handler); /* restore python signal handler (or will
crash when
user presses ctrl-c in the interpreter). */
siglongjmp(env, n);
}
/*
Interrupt handling for extension code (header file)
Copyright (c) 2006, William Stein, under "The BSD License" (see below).
All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the
following conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials
provided with the distribution.
* Neither the name of the SAGE Foundation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
/****************************************************************
WARNING: Only modify the version of this file in the
sage/ext/ directory. It overwrites all other copies
of this file during the SAGE build.
****************************************************************/
#ifndef FOO_H
#define FOO_H
#include <setjmp.h>
#include <Python.h>
#include <signal.h>
sigjmp_buf env;
/* In your Pyrex code, put
_sig_on
[pure c code block]
_sig_off
to get signal handling capabilities.
VERY VERY IMPORTANT:
1. These *must* always come in pairs. E.g., if you have just
a _sig_off without a corresponding _sig_on, then ctrl-c
later in the interpreter will sigfault!
2. Do *not* put these in the __init__ method of a Pyrex extension
class, or you'll get crashes.
3. Do not put these around any non-pure C code!!!!
4. If you need to do a check of control-c inside a loop, e.g.,
when constructing a matrix, put _sig_check instead of using
_sig_on then _sig_off.
*/
/* Unfortunately signal handler function
declarations vary HUGELY from platform to platform:
*/
#if defined(__CYGWIN32__) /* Windows XP */
_sig_func_ptr last, last_handler;
#elif defined(__FreeBSD__) /* FreeBSD */
sig_t last, last_handler;
#elif defined(__APPLE__) /* OSX */
sig_t last, last_handler;
#elif defined (__sun__) || defined (__sun) /* Solaris */
typedef void (*__sighandler_t )();
__sighandler_t last, last_handler;
#else /* Other, e.g., Linux */
__sighandler_t last, last_handler;
#endif
static PyObject *_m;
void sig_handle(int n);
static int __sig__n, __sig_str__n;
#define _sig_on last = signal(SIGINT, sig_handle); \
if (last != sig_handle) \
last_handler = last; \
signal(SIGALRM, sig_handle); \
signal(SIGSEGV, sig_handle); \
signal(SIGABRT, sig_handle); \
signal(SIGFPE, sig_handle); \
if (__sig__n = sigsetjmp(env,1)) { \
if (__sig__n == SIGINT) \
PyErr_SetString(PyExc_KeyboardInterrupt, ""); \
else \
if (__sig__n == SIGALRM) \
PyErr_SetString(PyExc_KeyboardInterrupt, "Alarm
received"); \
else \
PyErr_SetString(PyExc_RuntimeError, ""); \
return(0); \
}
#define _sig_str(s) last = signal(SIGINT, sig_handle); \
if (last != sig_handle) \
last_handler = last; \
signal(SIGSEGV, sig_handle); \
signal(SIGABRT, sig_handle); \
signal(SIGFPE, sig_handle); \
signal(SIGALRM, sig_handle); \
if (__sig_str__n = sigsetjmp(env,1)) { \
if(__sig_str__n == SIGINT ) \
PyErr_SetString(PyExc_KeyboardInterrupt, s); \
else \
if (__sig__n == SIGALRM) \
PyErr_SetString(PyExc_KeyboardInterrupt, s); \
else \
PyErr_SetString(PyExc_RuntimeError, s); \
return(0); \
}
#define _sig_off signal(SIGINT, last_handler); signal(SIGALRM, last_handler);
signal(SIGFPE, last_handler); signal(SIGABRT, last_handler);
#define _sig_check _sig_on _sig_off
#endif /* FOO_H */
/*
I thought maybe the following would work nicely, instead of just
returning, but no (it crashes sometimes!). Also the line number is
not set correctly. The only way I can imagine setting this correctly
is if the following bit of code is generated within pyrex, since pyrex
knows the line numbers.
PyErr_SetString(PyExc_RuntimeError, "(complete C-level
traceback not available)"); \
__pyx_filename = __pyx_f[1]; __pyx_lineno = 0; goto
__pyx_L1; \
}
*/
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