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/* select - Module containing unix select(2) call.
Under Unix, the file descriptors are small integers.
Under Win32, select only exists for sockets, and sockets may
have any value except INVALID_SOCKET.
Under BeOS, we suffer the same dichotomy as Win32; sockets can be anything
>= 0.
*/
#include
"Python.h"
#include
<structmember.h>
#ifdef
__APPLE__
/* Perform runtime testing for a broken poll on OSX to make it easier
* to use the same binary on multiple releases of the OS.
*/
#undef
HAVE_BROKEN_POLL
#endif
/* Windows #defines FD_SETSIZE to 64 if FD_SETSIZE isn't already defined.
64 is too small (too many people have bumped into that limit).
Here we boost it.
Users who want even more than the boosted limit should #define
FD_SETSIZE higher before this; e.g., via compiler /D switch.
*/
#if
defined(
MS_WINDOWS
)
&&
!defined(
FD_SETSIZE
)
#define
FD_SETSIZE
512
#endif
#if
defined(
HAVE_POLL_H
)
#include
<poll.h>
#elif
defined(
HAVE_SYS_POLL_H
)
#include
<sys/poll.h>
#endif
#ifdef
__sgi
/* This is missing from unistd.h */
extern
void
bzero
(
void
*
,
int
);
#endif
#ifdef
HAVE_SYS_TYPES_H
#include
<sys/types.h>
#endif
#if
defined(
PYOS_OS2
)
&&
!defined(
PYCC_GCC
)
#include
<sys/time.h>
#include
<utils.h>
#endif
#ifdef
MS_WINDOWS
# include
<winsock.h>
#else
# define
SOCKET
int
# ifdef
__BEOS__
# include
<net/socket.h>
# elif
defined(
__VMS
)
# include
<socket.h>
# endif
#endif
static
PyObject
*
SelectError
;
/* list of Python objects and their file descriptor */
typedef
struct
{
PyObject
*
obj
;
/* owned reference */
SOCKET
fd
;
int
sentinel
;
/* -1 == sentinel */
}
pylist
;
static
void
reap_obj
(
pylist
fd2obj
[
FD_SETSIZE
+
1
])
{
int
i
;
for
(
i
=
0
;
i
<
FD_SETSIZE
+
1
&&
fd2obj
[
i
].
sentinel
>=
0
;
i
++
) {
Py_XDECREF
(
fd2obj
[
i
].
obj
);
fd2obj
[
i
].
obj
=
NULL
;
}
fd2obj
[
0
].
sentinel
=
-1
;
}
/* returns -1 and sets the Python exception if an error occurred, otherwise
returns a number >= 0
*/
static
int
seq2set
(
PyObject
*
seq
,
fd_set
*
set
,
pylist
fd2obj
[
FD_SETSIZE
+
1
])
{
int
i
;
int
max
=
-1
;
int
index
=
0
;
int
len
=
-1
;
PyObject
*
fast_seq
=
NULL
;
PyObject
*
o
=
NULL
;
fd2obj
[
0
].
obj
=
(
PyObject
*
)
0
;
/* set list to zero size */
FD_ZERO
(
set
);
fast_seq
=
PySequence_Fast
(
seq
,
"arguments 1-3 must be sequences"
);
if
(!
fast_seq
)
return
-1
;
len
=
PySequence_Fast_GET_SIZE
(
fast_seq
);
for
(
i
=
0
;
i
<
len
;
i
++
) {
SOCKET
v
;
/* any intervening fileno() calls could decr this refcnt */
if
(!(
o
=
PySequence_Fast_GET_ITEM
(
fast_seq
,
i
)))
return
-1
;
Py_INCREF
(
o
);
v
=
PyObject_AsFileDescriptor
(
o
);
if
(
v
==
-1
) goto
finally
;
#if
defined(
_MSC_VER
)
max
=
0
;
/* not used for Win32 */
#else
/* !_MSC_VER */
if
(
v
<
0
||
v
>=
FD_SETSIZE
) {
PyErr_SetString
(
PyExc_ValueError
,
"filedescriptor out of range in select()"
);
goto
finally
;
}
if
(
v
>
max
)
max
=
v
;
#endif
/* _MSC_VER */
FD_SET
(
v
,
set
);
/* add object and its file descriptor to the list */
if
(
index
>=
FD_SETSIZE
) {
PyErr_SetString
(
PyExc_ValueError
,
"too many file descriptors in select()"
);
goto
finally
;
}
fd2obj
[
index
].
obj
=
o
;
fd2obj
[
index
].
fd
=
v
;
fd2obj
[
index
].
sentinel
=
0
;
fd2obj
[
++
index
].
sentinel
=
-1
;
}
Py_DECREF
(
fast_seq
);
return
max
+
1
;
finally
:
Py_XDECREF
(
o
);
Py_DECREF
(
fast_seq
);
return
-1
;
}
/* returns NULL and sets the Python exception if an error occurred */
static
PyObject
*
set2list
(
fd_set
*
set
,
pylist
fd2obj
[
FD_SETSIZE
+
1
])
{
int
i
,
j
,
count
=
0
;
PyObject
*
list
,
*
o
;
SOCKET
fd
;
for
(
j
=
0
;
fd2obj
[
j
].
sentinel
>=
0
;
j
++
) {
if
(
FD_ISSET
(
fd2obj
[
j
].
fd
,
set
))
count
++
;
}
list
=
PyList_New
(
count
);
if
(!
list
)
return
NULL
;
i
=
0
;
for
(
j
=
0
;
fd2obj
[
j
].
sentinel
>=
0
;
j
++
) {
fd
=
fd2obj
[
j
].
fd
;
if
(
FD_ISSET
(
fd
,
set
)) {
#ifndef
_MSC_VER
if
(
fd
>
FD_SETSIZE
) {
PyErr_SetString
(
PyExc_SystemError
,
"filedescriptor out of range returned in select()"
);
goto
finally
;
}
#endif
o
=
fd2obj
[
j
].
obj
;
fd2obj
[
j
].
obj
=
NULL
;
/* transfer ownership */
if
(
PyList_SetItem
(
list
,
i
,
o
)
<
0
)
goto
finally
;
i
++
;
}
}
return
list
;
finally
:
Py_DECREF
(
list
);
return
NULL
;
}
#undef
SELECT_USES_HEAP
#if
FD_SETSIZE
>
1024
#define
SELECT_USES_HEAP
#endif
/* FD_SETSIZE > 1024 */
static
PyObject
*
select_select
(
PyObject
*
self
,
PyObject
*
args
)
{
#ifdef
SELECT_USES_HEAP
pylist
*
rfd2obj
,
*
wfd2obj
,
*
efd2obj
;
#else
/* !SELECT_USES_HEAP */
/* XXX: All this should probably be implemented as follows:
* - find the highest descriptor we're interested in
* - add one
* - that's the size
* See: Stevens, APitUE, $12.5.1
*/
pylist
rfd2obj
[
FD_SETSIZE
+
1
];
pylist
wfd2obj
[
FD_SETSIZE
+
1
];
pylist
efd2obj
[
FD_SETSIZE
+
1
];
#endif
/* SELECT_USES_HEAP */
PyObject
*
ifdlist
,
*
ofdlist
,
*
efdlist
;
PyObject
*
ret
=
NULL
;
PyObject
*
tout
=
Py_None
;
fd_set
ifdset
,
ofdset
,
efdset
;
double
timeout
;
struct
timeval
tv
,
*
tvp
;
long
seconds
;
int
imax
,
omax
,
emax
,
max
;
int
n
;
/* convert arguments */
if
(!
PyArg_UnpackTuple
(
args
,
"select"
,
3
,
4
,
&
ifdlist
,
&
ofdlist
,
&
efdlist
,
&
tout
))
return
NULL
;
if
(
tout
==
Py_None
)
tvp
=
(
struct
timeval
*
)
0
;
else
if
(!
PyNumber_Check
(
tout
)) {
PyErr_SetString
(
PyExc_TypeError
,
"timeout must be a float or None"
);
return
NULL
;
}
else
{
timeout
=
PyFloat_AsDouble
(
tout
);
if
(
timeout
==
-1
&&
PyErr_Occurred
())
return
NULL
;
if
(
timeout
>
(
double
)
LONG_MAX
) {
PyErr_SetString
(
PyExc_OverflowError
,
"timeout period too long"
);
return
NULL
;
}
seconds
=
(
long
)
timeout
;
timeout
=
timeout
-
(
double
)
seconds
;
tv
.
tv_sec
=
seconds
;
tv
.
tv_usec
=
(
long
)(
timeout
*
1E6
);
tvp
=
&
tv
;
}
#ifdef
SELECT_USES_HEAP
/* Allocate memory for the lists */
rfd2obj
=
PyMem_NEW
(
pylist
,
FD_SETSIZE
+
1
);
wfd2obj
=
PyMem_NEW
(
pylist
,
FD_SETSIZE
+
1
);
efd2obj
=
PyMem_NEW
(
pylist
,
FD_SETSIZE
+
1
);
if
(
rfd2obj
==
NULL
||
wfd2obj
==
NULL
||
efd2obj
==
NULL
) {
if
(
rfd2obj
)
PyMem_DEL
(
rfd2obj
);
if
(
wfd2obj
)
PyMem_DEL
(
wfd2obj
);
if
(
efd2obj
)
PyMem_DEL
(
efd2obj
);
return
PyErr_NoMemory
();
}
#endif
/* SELECT_USES_HEAP */
/* Convert sequences to fd_sets, and get maximum fd number
* propagates the Python exception set in seq2set()
*/
rfd2obj
[
0
].
sentinel
=
-1
;
wfd2obj
[
0
].
sentinel
=
-1
;
efd2obj
[
0
].
sentinel
=
-1
;
if
((
imax
=
seq2set
(
ifdlist
,
&
ifdset
,
rfd2obj
))
<
0
)
goto
finally
;
if
((
omax
=
seq2set
(
ofdlist
,
&
ofdset
,
wfd2obj
))
<
0
)
goto
finally
;
if
((
emax
=
seq2set
(
efdlist
,
&
efdset
,
efd2obj
))
<
0
)
goto
finally
;
max
=
imax
;
if
(
omax
>
max
)
max
=
omax
;
if
(
emax
>
max
)
max
=
emax
;
Py_BEGIN_ALLOW_THREADS
n
=
select
(
max
,
&
ifdset
,
&
ofdset
,
&
efdset
,
tvp
);
Py_END_ALLOW_THREADS
#ifdef
MS_WINDOWS
if
(
n
==
SOCKET_ERROR
) {
PyErr_SetExcFromWindowsErr
(
SelectError
,
WSAGetLastError
());
}
#else
if
(
n
<
0
) {
PyErr_SetFromErrno
(
SelectError
);
}
#endif
else
if
(
n
==
0
) {
/* optimization */
ifdlist
=
PyList_New
(
0
);
if
(
ifdlist
) {
ret
=
PyTuple_Pack
(
3
,
ifdlist
,
ifdlist
,
ifdlist
);
Py_DECREF
(
ifdlist
);
}
}
else
{
/* any of these three calls can raise an exception. it's more
convenient to test for this after all three calls... but
is that acceptable?
*/
ifdlist
=
set2list
(
&
ifdset
,
rfd2obj
);
ofdlist
=
set2list
(
&
ofdset
,
wfd2obj
);
efdlist
=
set2list
(
&
efdset
,
efd2obj
);
if
(
PyErr_Occurred
())
ret
=
NULL
;
else
ret
=
PyTuple_Pack
(
3
,
ifdlist
,
ofdlist
,
efdlist
);
Py_DECREF
(
ifdlist
);
Py_DECREF
(
ofdlist
);
Py_DECREF
(
efdlist
);
}
finally
:
reap_obj
(
rfd2obj
);
reap_obj
(
wfd2obj
);
reap_obj
(
efd2obj
);
#ifdef
SELECT_USES_HEAP
PyMem_DEL
(
rfd2obj
);
PyMem_DEL
(
wfd2obj
);
PyMem_DEL
(
efd2obj
);
#endif
/* SELECT_USES_HEAP */
return
ret
;
}
#if
defined(
HAVE_POLL
)
&&
!defined(
HAVE_BROKEN_POLL
)
/*
* poll() support
*/
typedef
struct
{
PyObject_HEAD
PyObject
*
dict
;
int
ufd_uptodate
;
int
ufd_len
;
struct
pollfd
*
ufds
;
}
pollObject
;
static
PyTypeObject
poll_Type
;
/* Update the malloc'ed array of pollfds to match the dictionary
contained within a pollObject. Return 1 on success, 0 on an error.
*/
static
int
update_ufd_array
(
pollObject
*
self
)
{
Py_ssize_t
i
,
pos
;
PyObject
*
key
,
*
value
;
struct
pollfd
*
old_ufds
=
self
->
ufds
;
self
->
ufd_len
=
PyDict_Size
(
self
->
dict
);
PyMem_RESIZE
(
self
->
ufds
,
struct
pollfd
,
self
->
ufd_len
);
if
(
self
->
ufds
==
NULL
) {
self
->
ufds
=
old_ufds
;
PyErr_NoMemory
();
return
0
;
}
i
=
pos
=
0
;
while
(
PyDict_Next
(
self
->
dict
,
&
pos
,
&
key
,
&
value
)) {
self
->
ufds
[
i
].
fd
=
PyInt_AsLong
(
key
);
self
->
ufds
[
i
].
events
=
(
short
)
PyInt_AsLong
(
value
);
i
++
;
}
self
->
ufd_uptodate
=
1
;
return
1
;
}
PyDoc_STRVAR
(
poll_register_doc
,
"register(fd [, eventmask] ) -> None\n\n\
Register a file descriptor with the polling object.\n\
fd -- either an integer, or an object with a fileno() method returning an\n\
int.\n\
events -- an optional bitmask describing the type of events to check for"
);
static
PyObject
*
poll_register
(
pollObject
*
self
,
PyObject
*
args
)
{
PyObject
*
o
,
*
key
,
*
value
;
int
fd
,
events
=
POLLIN
|
POLLPRI
|
POLLOUT
;
int
err
;
if
(!
PyArg_ParseTuple
(
args
,
"O|i:register"
,
&
o
,
&
events
)) {
return
NULL
;
}
fd
=
PyObject_AsFileDescriptor
(
o
);
if
(
fd
==
-1
)
return
NULL
;
/* Add entry to the internal dictionary: the key is the
file descriptor, and the value is the event mask. */
key
=
PyInt_FromLong
(
fd
);
if
(
key
==
NULL
)
return
NULL
;
value
=
PyInt_FromLong
(
events
);
if
(
value
==
NULL
) {
Py_DECREF
(
key
);
return
NULL
;
}
err
=
PyDict_SetItem
(
self
->
dict
,
key
,
value
);
Py_DECREF
(
key
);
Py_DECREF
(
value
);
if
(
err
<
0
)
return
NULL
;
self
->
ufd_uptodate
=
0
;
Py_INCREF
(
Py_None
);
return
Py_None
;
}
PyDoc_STRVAR
(
poll_modify_doc
,
"modify(fd, eventmask) -> None\n\n\
Modify an already registered file descriptor.\n\
fd -- either an integer, or an object with a fileno() method returning an\n\
int.\n\
events -- an optional bitmask describing the type of events to check for"
);
static
PyObject
*
poll_modify
(
pollObject
*
self
,
PyObject
*
args
)
{
PyObject
*
o
,
*
key
,
*
value
;
int
fd
,
events
;
int
err
;
if
(!
PyArg_ParseTuple
(
args
,
"Oi:modify"
,
&
o
,
&
events
)) {
return
NULL
;
}
fd
=
PyObject_AsFileDescriptor
(
o
);
if
(
fd
==
-1
)
return
NULL
;
/* Modify registered fd */
key
=
PyInt_FromLong
(
fd
);
if
(
key
==
NULL
)
return
NULL
;
if
(
PyDict_GetItem
(
self
->
dict
,
key
)
==
NULL
) {
errno
=
ENOENT
;
PyErr_SetFromErrno
(
PyExc_IOError
);
return
NULL
;
}
value
=
PyInt_FromLong
(
events
);
if
(
value
==
NULL
) {
Py_DECREF
(
key
);
return
NULL
;
}
err
=
PyDict_SetItem
(
self
->
dict
,
key
,
value
);
Py_DECREF
(
key
);
Py_DECREF
(
value
);
if
(
err
<
0
)
return
NULL
;
self
->
ufd_uptodate
=
0
;
Py_INCREF
(
Py_None
);
return
Py_None
;
}
PyDoc_STRVAR
(
poll_unregister_doc
,
"unregister(fd) -> None\n\n\
Remove a file descriptor being tracked by the polling object."
);
static
PyObject
*
poll_unregister
(
pollObject
*
self
,
PyObject
*
o
)
{
PyObject
*
key
;
int
fd
;
fd
=
PyObject_AsFileDescriptor
(
o
);
if
(
fd
==
-1
)
return
NULL
;
/* Check whether the fd is already in the array */
key
=
PyInt_FromLong
(
fd
);
if
(
key
==
NULL
)
return
NULL
;
if
(
PyDict_DelItem
(
self
->
dict
,
key
)
==
-1
) {
Py_DECREF
(
key
);
/* This will simply raise the KeyError set by PyDict_DelItem
if the file descriptor isn't registered. */
return
NULL
;
}
Py_DECREF
(
key
);
self
->
ufd_uptodate
=
0
;
Py_INCREF
(
Py_None
);
return
Py_None
;
}
PyDoc_STRVAR
(
poll_poll_doc
,
"poll( [timeout] ) -> list of (fd, event) 2-tuples\n\n\
Polls the set of registered file descriptors, returning a list containing \n\
any descriptors that have events or errors to report."
);
static
PyObject
*
poll_poll
(
pollObject
*
self
,
PyObject
*
args
)
{
PyObject
*
result_list
=
NULL
,
*
tout
=
NULL
;
int
timeout
=
0
,
poll_result
,
i
,
j
;
PyObject
*
value
=
NULL
,
*
num
=
NULL
;
if
(!
PyArg_UnpackTuple
(
args
,
"poll"
,
0
,
1
,
&
tout
)) {
return
NULL
;
}
/* Check values for timeout */
if
(
tout
==
NULL
||
tout
==
Py_None
)
timeout
=
-1
;
else
if
(!
PyNumber_Check
(
tout
)) {
PyErr_SetString
(
PyExc_TypeError
,
"timeout must be an integer or None"
);
return
NULL
;
}
else
{
tout
=
PyNumber_Int
(
tout
);
if
(!
tout
)
return
NULL
;
timeout
=
PyInt_AsLong
(
tout
);
Py_DECREF
(
tout
);
if
(
timeout
==
-1
&&
PyErr_Occurred
())
return
NULL
;
}
/* Ensure the ufd array is up to date */
if
(!
self
->
ufd_uptodate
)
if
(
update_ufd_array
(
self
)
==
0
)
return
NULL
;
/* call poll() */
Py_BEGIN_ALLOW_THREADS
poll_result
=
poll
(
self
->
ufds
,
self
->
ufd_len
,
timeout
);
Py_END_ALLOW_THREADS
if
(
poll_result
<
0
) {
PyErr_SetFromErrno
(
SelectError
);
return
NULL
;
}
/* build the result list */
result_list
=
PyList_New
(
poll_result
);
if
(!
result_list
)
return
NULL
;
else
{
for
(
i
=
0
,
j
=
0
;
j
<
poll_result
;
j
++
) {
/* skip to the next fired descriptor */
while
(!
self
->
ufds
[
i
].
revents
) {
i
++
;
}
/* if we hit a NULL return, set value to NULL
and break out of loop; code at end will
clean up result_list */
value
=
PyTuple_New
(
2
);
if
(
value
==
NULL
)
goto
error
;
num
=
PyInt_FromLong
(
self
->
ufds
[
i
].
fd
);
if
(
num
==
NULL
) {
Py_DECREF
(
value
);
goto
error
;
}
PyTuple_SET_ITEM
(
value
,
0
,
num
);
/* The &0xffff is a workaround for AIX. 'revents'
is a 16-bit short, and IBM assigned POLLNVAL
to be 0x8000, so the conversion to int results
in a negative number. See SF bug #923315. */
num
=
PyInt_FromLong
(
self
->
ufds
[
i
].
revents
&
0xffff
);
if
(
num
==
NULL
) {
Py_DECREF
(
value
);
goto
error
;
}
PyTuple_SET_ITEM
(
value
,
1
,
num
);
if
((
PyList_SetItem
(
result_list
,
j
,
value
))
==
-1
) {
Py_DECREF
(
value
);
goto
error
;
}
i
++
;
}
}
return
result_list
;
error
:
Py_DECREF
(
result_list
);
return
NULL
;
}
static
PyMethodDef
poll_methods
[]
=
{
{
"register"
, (
PyCFunction
)
poll_register
,
METH_VARARGS
,
poll_register_doc
},
{
"modify"
, (
PyCFunction
)
poll_modify
,
METH_VARARGS
,
poll_modify_doc
},
{
"unregister"
, (
PyCFunction
)
poll_unregister
,
METH_O
,
poll_unregister_doc
},
{
"poll"
, (
PyCFunction
)
poll_poll
,
METH_VARARGS
,
poll_poll_doc
},
{
NULL
,
NULL
}
/* sentinel */
};
static
pollObject
*
newPollObject
(
void
)
{
pollObject
*
self
;
self
=
PyObject_New
(
pollObject
,
&
poll_Type
);
if
(
self
==
NULL
)
return
NULL
;
/* ufd_uptodate is a Boolean, denoting whether the
array pointed to by ufds matches the contents of the dictionary. */
self
->
ufd_uptodate
=
0
;
self
->
ufds
=
NULL
;
self
->
dict
=
PyDict_New
();
if
(
self
->
dict
==
NULL
) {
Py_DECREF
(
self
);
return
NULL
;
}
return
self
;
}
static
void
poll_dealloc
(
pollObject
*
self
)
{
if
(
self
->
ufds
!=
NULL
)
PyMem_DEL
(
self
->
ufds
);
Py_XDECREF
(
self
->
dict
);
PyObject_Del
(
self
);
}
static
PyObject
*
poll_getattr
(
pollObject
*
self
,
char
*
name
)
{
return
Py_FindMethod
(
poll_methods
, (
PyObject
*
)
self
,
name
);
}
static
PyTypeObject
poll_Type
=
{
/* The ob_type field must be initialized in the module init function
* to be portable to Windows without using C++. */
PyVarObject_HEAD_INIT
(
NULL
,
0
)
"select.poll"
,
/*tp_name*/
sizeof
(
pollObject
),
/*tp_basicsize*/
0
,
/*tp_itemsize*/
/* methods */
(
destructor
)
poll_dealloc
,
/*tp_dealloc*/
0
,
/*tp_print*/
(
getattrfunc
)
poll_getattr
,
/*tp_getattr*/
0
,
/*tp_setattr*/
0
,
/*tp_compare*/
0
,
/*tp_repr*/
0
,
/*tp_as_number*/
0
,
/*tp_as_sequence*/
0
,
/*tp_as_mapping*/
0
,
/*tp_hash*/
};
PyDoc_STRVAR
(
poll_doc
,
"Returns a polling object, which supports registering and\n\
unregistering file descriptors, and then polling them for I/O events."
);
static
PyObject
*
select_poll
(
PyObject
*
self
,
PyObject
*
unused
)
{
return
(
PyObject
*
)
newPollObject
();
}
#ifdef
__APPLE__
/*
* On some systems poll() sets errno on invalid file descriptors. We test
* for this at runtime because this bug may be fixed or introduced between
* OS releases.
*/
static
int
select_have_broken_poll
(
void
)
{
int
poll_test
;
int
filedes
[
2
];
struct
pollfd
poll_struct
=
{
0
,
POLLIN
|
POLLPRI
|
POLLOUT
,
0
};
/* Create a file descriptor to make invalid */
if
(
pipe
(
filedes
)
<
0
) {
return
1
;
}
poll_struct
.
fd
=
filedes
[
0
];
close
(
filedes
[
0
]);
close
(
filedes
[
1
]);
poll_test
=
poll
(
&
poll_struct
,
1
,
0
);
if
(
poll_test
<
0
) {
return
1
;
}
else
if
(
poll_test
==
0
&&
poll_struct
.
revents
!=
POLLNVAL
) {
return
1
;
}
return
0
;
}
#endif
/* __APPLE__ */
#endif
/* HAVE_POLL */
#ifdef
HAVE_EPOLL
/* **************************************************************************
* epoll interface for Linux 2.6
*
* Written by Christian Heimes
* Inspired by Twisted's _epoll.pyx and select.poll()
*/
#ifdef
HAVE_SYS_EPOLL_H
#include
<sys/epoll.h>
#endif
typedef
struct
{
PyObject_HEAD
SOCKET
epfd
;
/* epoll control file descriptor */
}
pyEpoll_Object
;
static
PyTypeObject
pyEpoll_Type
;
#define
pyepoll_CHECK
(
op
) (PyObject_TypeCheck((op), &pyEpoll_Type))
static
PyObject
*
pyepoll_err_closed
(
void
)
{
PyErr_SetString
(
PyExc_ValueError
,
"I/O operation on closed epoll fd"
);
return
NULL
;
}
static
int
pyepoll_internal_close
(
pyEpoll_Object
*
self
)
{
int
save_errno
=
0
;
if
(
self
->
epfd
>=
0
) {
int
epfd
=
self
->
epfd
;
self
->
epfd
=
-1
;
Py_BEGIN_ALLOW_THREADS
if
(
close
(
epfd
)
<
0
)
save_errno
=
errno
;
Py_END_ALLOW_THREADS
}
return
save_errno
;
}
static
PyObject
*
newPyEpoll_Object
(
PyTypeObject
*
type
,
int
sizehint
,
SOCKET
fd
)
{
pyEpoll_Object
*
self
;
if
(
sizehint
==
-1
) {
sizehint
=
FD_SETSIZE
-
1
;
}
else
if
(
sizehint
<
1
) {
PyErr_Format
(
PyExc_ValueError
,
"sizehint must be greater zero, got %d"
,
sizehint
);
return
NULL
;
}
assert
(
type
!=
NULL
&&
type
->
tp_alloc
!=
NULL
);
self
=
(
pyEpoll_Object
*
)
type
->
tp_alloc
(
type
,
0
);
if
(
self
==
NULL
)
return
NULL
;
if
(
fd
==
-1
) {
Py_BEGIN_ALLOW_THREADS
self
->
epfd
=
epoll_create
(
sizehint
);
Py_END_ALLOW_THREADS
}
else
{
self
->
epfd
=
fd
;
}
if
(
self
->
epfd
<
0
) {
Py_DECREF
(
self
);
PyErr_SetFromErrno
(
PyExc_IOError
);
return
NULL
;
}
return
(
PyObject
*
)
self
;
}
static
PyObject
*
pyepoll_new
(
PyTypeObject
*
type
,
PyObject
*
args
,
PyObject
*
kwds
)
{
int
sizehint
=
-1
;
static
char
*
kwlist
[]
=
{
"sizehint"
,
NULL
};
if
(!
PyArg_ParseTupleAndKeywords
(
args
,
kwds
,
"|i:epoll"
,
kwlist
,
&
sizehint
))
return
NULL
;
return
newPyEpoll_Object
(
type
,
sizehint
,
-1
);
}
static
void
pyepoll_dealloc
(
pyEpoll_Object
*
self
)
{
(
void
)
pyepoll_internal_close
(
self
);
Py_TYPE
(
self
)
->
tp_free
(
self
);
}
static
PyObject
*
pyepoll_close
(
pyEpoll_Object
*
self
)
{
errno
=
pyepoll_internal_close
(
self
);
if
(
errno
<
0
) {
PyErr_SetFromErrno
(
PyExc_IOError
);
return
NULL
;
}
Py_RETURN_NONE
;
}
PyDoc_STRVAR
(
pyepoll_close_doc
,
"close() -> None\n\
\n\
Close the epoll control file descriptor. Further operations on the epoll\n\
object will raise an exception."
);
static
PyObject
*
pyepoll_get_closed
(
pyEpoll_Object
*
self
)
{
if
(
self
->
epfd
<
0
)
Py_RETURN_TRUE
;
else
Py_RETURN_FALSE
;
}
static
PyObject
*
pyepoll_fileno
(
pyEpoll_Object
*
self
)
{
if
(
self
->
epfd
<
0
)
return
pyepoll_err_closed
();
return
PyInt_FromLong
(
self
->
epfd
);
}
PyDoc_STRVAR
(
pyepoll_fileno_doc
,
"fileno() -> int\n\
\n\
Return the epoll control file descriptor."
);
static
PyObject
*
pyepoll_fromfd
(
PyObject
*
cls
,
PyObject
*
args
)
{
SOCKET
fd
;
if
(!
PyArg_ParseTuple
(
args
,
"i:fromfd"
,
&
fd
))
return
NULL
;
return
newPyEpoll_Object
((
PyTypeObject
*
)
cls
,
-1
,
fd
);
}
PyDoc_STRVAR
(
pyepoll_fromfd_doc
,
"fromfd(fd) -> epoll\n\
\n\
Create an epoll object from a given control fd."
);
static
PyObject
*
pyepoll_internal_ctl
(
int
epfd
,
int
op
,
PyObject
*
pfd
,
unsigned
int
events
)
{
struct
epoll_event
ev
;
int
result
;
int
fd
;
if
(
epfd
<
0
)
return
pyepoll_err_closed
();
fd
=
PyObject_AsFileDescriptor
(
pfd
);
if
(
fd
==
-1
) {
return
NULL
;
}
switch
(
op
) {
case
EPOLL_CTL_ADD
:
case
EPOLL_CTL_MOD
:
ev
.
events
=
events
;
ev
.
data
.
fd
=
fd
;
Py_BEGIN_ALLOW_THREADS
result
=
epoll_ctl
(
epfd
,
op
,
fd
,
&
ev
);
Py_END_ALLOW_THREADS
break
;
case
EPOLL_CTL_DEL
:
/* In kernel versions before 2.6.9, the EPOLL_CTL_DEL
* operation required a non-NULL pointer in event, even
* though this argument is ignored. */
Py_BEGIN_ALLOW_THREADS
result
=
epoll_ctl
(
epfd
,
op
,
fd
,
&
ev
);
if
(
errno
==
EBADF
) {
/* fd already closed */
result
=
0
;
errno
=
0
;
}
Py_END_ALLOW_THREADS
break
;
default
:
result
=
-1
;
errno
=
EINVAL
;
}
if
(
result
<
0
) {
PyErr_SetFromErrno
(
PyExc_IOError
);
return
NULL
;
}
Py_RETURN_NONE
;
}
static
PyObject
*
pyepoll_register
(
pyEpoll_Object
*
self
,
PyObject
*
args
,
PyObject
*
kwds
)
{
PyObject
*
pfd
;
unsigned
int
events
=
EPOLLIN
|
EPOLLOUT
|
EPOLLPRI
;
static
char
*
kwlist
[]
=
{
"fd"
,
"eventmask"
,
NULL
};
if
(!
PyArg_ParseTupleAndKeywords
(
args
,
kwds
,
"O|I:register"
,
kwlist
,
&
pfd
,
&
events
)) {
return
NULL
;
}
return
pyepoll_internal_ctl
(
self
->
epfd
,
EPOLL_CTL_ADD
,
pfd
,
events
);
}
PyDoc_STRVAR
(
pyepoll_register_doc
,
"register(fd[, eventmask]) -> bool\n\
\n\
Registers a new fd or modifies an already registered fd. register() returns\n\
True if a new fd was registered or False if the event mask for fd was modified.\n\
fd is the target file descriptor of the operation.\n\
events is a bit set composed of the various EPOLL constants; the default\n\
is EPOLL_IN | EPOLL_OUT | EPOLL_PRI.\n\
\n\
The epoll interface supports all file descriptors that support poll."
);
static
PyObject
*
pyepoll_modify
(
pyEpoll_Object
*
self
,
PyObject
*
args
,
PyObject
*
kwds
)
{
PyObject
*
pfd
;
unsigned
int
events
;
static
char
*
kwlist
[]
=
{
"fd"
,
"eventmask"
,
NULL
};
if
(!
PyArg_ParseTupleAndKeywords
(
args
,
kwds
,
"OI:modify"
,
kwlist
,
&
pfd
,
&
events
)) {
return
NULL
;
}
return
pyepoll_internal_ctl
(
self
->
epfd
,
EPOLL_CTL_MOD
,
pfd
,
events
);
}
PyDoc_STRVAR
(
pyepoll_modify_doc
,
"modify(fd, eventmask) -> None\n\
\n\
fd is the target file descriptor of the operation\n\
events is a bit set composed of the various EPOLL constants"
);
static
PyObject
*
pyepoll_unregister
(
pyEpoll_Object
*
self
,
PyObject
*
args
,
PyObject
*
kwds
)
{
PyObject
*
pfd
;
static
char
*
kwlist
[]
=
{
"fd"
,
NULL
};
if
(!
PyArg_ParseTupleAndKeywords
(
args
,
kwds
,
"O:unregister"
,
kwlist
,
&
pfd
)) {
return
NULL
;
}
return
pyepoll_internal_ctl
(
self
->
epfd
,
EPOLL_CTL_DEL
,
pfd
,
0
);
}
PyDoc_STRVAR
(
pyepoll_unregister_doc
,
"unregister(fd) -> None\n\
\n\
fd is the target file descriptor of the operation."
);
static
PyObject
*
pyepoll_poll
(
pyEpoll_Object
*
self
,
PyObject
*
args
,
PyObject
*
kwds
)
{
double
dtimeout
=
-1.
;
int
timeout
;
int
maxevents
=
-1
;
int
nfds
,
i
;
PyObject
*
elist
=
NULL
,
*
etuple
=
NULL
;
struct
epoll_event
*
evs
=
NULL
;
static
char
*
kwlist
[]
=
{
"timeout"
,
"maxevents"
,
NULL
};
if
(
self
->
epfd
<
0
)
return
pyepoll_err_closed
();
if
(!
PyArg_ParseTupleAndKeywords
(
args
,
kwds
,
"|di:poll"
,
kwlist
,
&
dtimeout
,
&
maxevents
)) {
return
NULL
;
}
if
(
dtimeout
<
0
) {
timeout
=
-1
;
}
else
if
(
dtimeout
*
1000.0
>
INT_MAX
) {
PyErr_SetString
(
PyExc_OverflowError
,
"timeout is too large"
);
return
NULL
;
}
else
{
timeout
=
(
int
)(
dtimeout
*
1000.0
);
}
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