Merged revisions 64104,64117 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
r64104 | benjamin.peterson | 2008-06-10 21:40:25 -0500 (Tue, 10 Jun 2008) | 2 lines
add the multiprocessing package to fulfill PEP 371
........
r64117 | benjamin.peterson | 2008-06-11 07:26:31 -0500 (Wed, 11 Jun 2008) | 2 lines
fix import of multiprocessing by juggling imports
........
diff --git a/Modules/_multiprocessing/connection.h b/Modules/_multiprocessing/connection.h
new file mode 100644
index 0000000..e95d4c4
--- /dev/null
+++ b/Modules/_multiprocessing/connection.h
@@ -0,0 +1,515 @@
+/*
+ * Definition of a `Connection` type.
+ * Used by `socket_connection.c` and `pipe_connection.c`.
+ *
+ * connection.h
+ *
+ * Copyright (c) 2006-2008, R Oudkerk --- see COPYING.txt
+ */
+
+#ifndef CONNECTION_H
+#define CONNECTION_H
+
+/*
+ * Read/write flags
+ */
+
+#define READABLE 1
+#define WRITABLE 2
+
+#define CHECK_READABLE(self) \
+ if (!(self->flags & READABLE)) { \
+ PyErr_SetString(PyExc_IOError, "connection is write-only"); \
+ return NULL; \
+ }
+
+#define CHECK_WRITABLE(self) \
+ if (!(self->flags & WRITABLE)) { \
+ PyErr_SetString(PyExc_IOError, "connection is read-only"); \
+ return NULL; \
+ }
+
+/*
+ * Allocation and deallocation
+ */
+
+static PyObject *
+connection_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+ ConnectionObject *self;
+ HANDLE handle;
+ BOOL readable = TRUE, writable = TRUE;
+
+ static char *kwlist[] = {"handle", "readable", "writable", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, F_HANDLE "|ii", kwlist,
+ &handle, &readable, &writable))
+ return NULL;
+
+ if (handle == INVALID_HANDLE_VALUE || (Py_ssize_t)handle < 0) {
+ PyErr_Format(PyExc_IOError, "invalid handle %"
+ PY_FORMAT_SIZE_T "d", (Py_ssize_t)handle);
+ return NULL;
+ }
+
+ if (!readable && !writable) {
+ PyErr_SetString(PyExc_ValueError,
+ "either readable or writable must be true");
+ return NULL;
+ }
+
+ self = PyObject_New(ConnectionObject, type);
+ if (self == NULL)
+ return NULL;
+
+ self->weakreflist = NULL;
+ self->handle = handle;
+ self->flags = 0;
+
+ if (readable)
+ self->flags |= READABLE;
+ if (writable)
+ self->flags |= WRITABLE;
+ assert(self->flags >= 1 && self->flags <= 3);
+
+ return (PyObject*)self;
+}
+
+static void
+connection_dealloc(ConnectionObject* self)
+{
+ if (self->weakreflist != NULL)
+ PyObject_ClearWeakRefs((PyObject*)self);
+
+ if (self->handle != INVALID_HANDLE_VALUE) {
+ Py_BEGIN_ALLOW_THREADS
+ CLOSE(self->handle);
+ Py_END_ALLOW_THREADS
+ }
+ PyObject_Del(self);
+}
+
+/*
+ * Functions for transferring buffers
+ */
+
+static PyObject *
+connection_sendbytes(ConnectionObject *self, PyObject *args)
+{
+ char *buffer;
+ Py_ssize_t length, offset=0, size=PY_SSIZE_T_MIN;
+ int res;
+
+ if (!PyArg_ParseTuple(args, F_RBUFFER "#|" F_PY_SSIZE_T F_PY_SSIZE_T,
+ &buffer, &length, &offset, &size))
+ return NULL;
+
+ CHECK_WRITABLE(self);
+
+ if (offset < 0) {
+ PyErr_SetString(PyExc_ValueError, "offset is negative");
+ return NULL;
+ }
+ if (length < offset) {
+ PyErr_SetString(PyExc_ValueError, "buffer length < offset");
+ return NULL;
+ }
+
+ if (size == PY_SSIZE_T_MIN) {
+ size = length - offset;
+ } else {
+ if (size < 0) {
+ PyErr_SetString(PyExc_ValueError, "size is negative");
+ return NULL;
+ }
+ if (offset + size > length) {
+ PyErr_SetString(PyExc_ValueError,
+ "buffer length < offset + size");
+ return NULL;
+ }
+ }
+
+ Py_BEGIN_ALLOW_THREADS
+ res = conn_send_string(self, buffer + offset, size);
+ Py_END_ALLOW_THREADS
+
+ if (res < 0)
+ return mp_SetError(PyExc_IOError, res);
+
+ Py_RETURN_NONE;
+}
+
+static PyObject *
+connection_recvbytes(ConnectionObject *self, PyObject *args)
+{
+ char *freeme = NULL;
+ Py_ssize_t res, maxlength = PY_SSIZE_T_MAX;
+ PyObject *result = NULL;
+
+ if (!PyArg_ParseTuple(args, "|" F_PY_SSIZE_T, &maxlength))
+ return NULL;
+
+ CHECK_READABLE(self);
+
+ if (maxlength < 0) {
+ PyErr_SetString(PyExc_ValueError, "maxlength < 0");
+ return NULL;
+ }
+
+ Py_BEGIN_ALLOW_THREADS
+ res = conn_recv_string(self, self->buffer, CONNECTION_BUFFER_SIZE,
+ &freeme, maxlength);
+ Py_END_ALLOW_THREADS
+
+ if (res < 0) {
+ if (res == MP_BAD_MESSAGE_LENGTH) {
+ if ((self->flags & WRITABLE) == 0) {
+ Py_BEGIN_ALLOW_THREADS
+ CLOSE(self->handle);
+ Py_END_ALLOW_THREADS
+ self->handle = INVALID_HANDLE_VALUE;
+ } else {
+ self->flags = WRITABLE;
+ }
+ }
+ mp_SetError(PyExc_IOError, res);
+ } else {
+ if (freeme == NULL) {
+ result = PyBytes_FromStringAndSize(self->buffer, res);
+ } else {
+ result = PyBytes_FromStringAndSize(freeme, res);
+ PyMem_Free(freeme);
+ }
+ }
+
+ return result;
+}
+
+static PyObject *
+connection_recvbytes_into(ConnectionObject *self, PyObject *args)
+{
+ char *freeme = NULL, *buffer = NULL;
+ Py_ssize_t res, length, offset = 0;
+ PyObject *result = NULL;
+
+ if (!PyArg_ParseTuple(args, "w#|" F_PY_SSIZE_T,
+ &buffer, &length, &offset))
+ return NULL;
+
+ CHECK_READABLE(self);
+
+ if (offset < 0) {
+ PyErr_SetString(PyExc_ValueError, "negative offset");
+ return NULL;
+ }
+
+ if (offset > length) {
+ PyErr_SetString(PyExc_ValueError, "offset too large");
+ return NULL;
+ }
+
+ Py_BEGIN_ALLOW_THREADS
+ res = conn_recv_string(self, buffer+offset, length-offset,
+ &freeme, PY_SSIZE_T_MAX);
+ Py_END_ALLOW_THREADS
+
+ if (res < 0) {
+ if (res == MP_BAD_MESSAGE_LENGTH) {
+ if ((self->flags & WRITABLE) == 0) {
+ Py_BEGIN_ALLOW_THREADS
+ CLOSE(self->handle);
+ Py_END_ALLOW_THREADS
+ self->handle = INVALID_HANDLE_VALUE;
+ } else {
+ self->flags = WRITABLE;
+ }
+ }
+ mp_SetError(PyExc_IOError, res);
+ } else {
+ if (freeme == NULL) {
+ result = PyInt_FromSsize_t(res);
+ } else {
+ result = PyObject_CallFunction(BufferTooShort,
+ F_RBUFFER "#",
+ freeme, res);
+ PyMem_Free(freeme);
+ if (result) {
+ PyErr_SetObject(BufferTooShort, result);
+ Py_DECREF(result);
+ }
+ return NULL;
+ }
+ }
+
+ return result;
+}
+
+/*
+ * Functions for transferring objects
+ */
+
+static PyObject *
+connection_send_obj(ConnectionObject *self, PyObject *obj)
+{
+ char *buffer;
+ int res;
+ Py_ssize_t length;
+ PyObject *pickled_string = NULL;
+
+ CHECK_WRITABLE(self);
+
+ pickled_string = PyObject_CallFunctionObjArgs(pickle_dumps, obj,
+ pickle_protocol, NULL);
+ if (!pickled_string)
+ goto failure;
+
+ if (PyBytes_AsStringAndSize(pickled_string, &buffer, &length) < 0)
+ goto failure;
+
+ Py_BEGIN_ALLOW_THREADS
+ res = conn_send_string(self, buffer, (int)length);
+ Py_END_ALLOW_THREADS
+
+ if (res < 0) {
+ mp_SetError(PyExc_IOError, res);
+ goto failure;
+ }
+
+ Py_XDECREF(pickled_string);
+ Py_RETURN_NONE;
+
+ failure:
+ Py_XDECREF(pickled_string);
+ return NULL;
+}
+
+static PyObject *
+connection_recv_obj(ConnectionObject *self)
+{
+ char *freeme = NULL;
+ Py_ssize_t res;
+ PyObject *temp = NULL, *result = NULL;
+
+ CHECK_READABLE(self);
+
+ Py_BEGIN_ALLOW_THREADS
+ res = conn_recv_string(self, self->buffer, CONNECTION_BUFFER_SIZE,
+ &freeme, PY_SSIZE_T_MAX);
+ Py_END_ALLOW_THREADS
+
+ if (res < 0) {
+ if (res == MP_BAD_MESSAGE_LENGTH) {
+ if ((self->flags & WRITABLE) == 0) {
+ Py_BEGIN_ALLOW_THREADS
+ CLOSE(self->handle);
+ Py_END_ALLOW_THREADS
+ self->handle = INVALID_HANDLE_VALUE;
+ } else {
+ self->flags = WRITABLE;
+ }
+ }
+ mp_SetError(PyExc_IOError, res);
+ } else {
+ if (freeme == NULL) {
+ temp = PyBytes_FromStringAndSize(self->buffer, res);
+ } else {
+ temp = PyBytes_FromStringAndSize(freeme, res);
+ PyMem_Free(freeme);
+ }
+ }
+
+ if (temp)
+ result = PyObject_CallFunctionObjArgs(pickle_loads,
+ temp, NULL);
+ Py_XDECREF(temp);
+ return result;
+}
+
+/*
+ * Other functions
+ */
+
+static PyObject *
+connection_poll(ConnectionObject *self, PyObject *args)
+{
+ PyObject *timeout_obj = NULL;
+ double timeout = 0.0;
+ int res;
+
+ CHECK_READABLE(self);
+
+ if (!PyArg_ParseTuple(args, "|O", &timeout_obj))
+ return NULL;
+
+ if (timeout_obj == NULL) {
+ timeout = 0.0;
+ } else if (timeout_obj == Py_None) {
+ timeout = -1.0; /* block forever */
+ } else {
+ timeout = PyFloat_AsDouble(timeout_obj);
+ if (PyErr_Occurred())
+ return NULL;
+ if (timeout < 0.0)
+ timeout = 0.0;
+ }
+
+ Py_BEGIN_ALLOW_THREADS
+ res = conn_poll(self, timeout);
+ Py_END_ALLOW_THREADS
+
+ switch (res) {
+ case TRUE:
+ Py_RETURN_TRUE;
+ case FALSE:
+ Py_RETURN_FALSE;
+ default:
+ return mp_SetError(PyExc_IOError, res);
+ }
+}
+
+static PyObject *
+connection_fileno(ConnectionObject* self)
+{
+ if (self->handle == INVALID_HANDLE_VALUE) {
+ PyErr_SetString(PyExc_IOError, "handle is invalid");
+ return NULL;
+ }
+ return PyInt_FromLong((long)self->handle);
+}
+
+static PyObject *
+connection_close(ConnectionObject *self)
+{
+ if (self->handle != INVALID_HANDLE_VALUE) {
+ Py_BEGIN_ALLOW_THREADS
+ CLOSE(self->handle);
+ Py_END_ALLOW_THREADS
+ self->handle = INVALID_HANDLE_VALUE;
+ }
+
+ Py_RETURN_NONE;
+}
+
+static PyObject *
+connection_repr(ConnectionObject *self)
+{
+ static char *conn_type[] = {"read-only", "write-only", "read-write"};
+
+ assert(self->flags >= 1 && self->flags <= 3);
+ return FROM_FORMAT("<%s %s, handle %" PY_FORMAT_SIZE_T "d>",
+ conn_type[self->flags - 1],
+ CONNECTION_NAME, (Py_ssize_t)self->handle);
+}
+
+/*
+ * Getters and setters
+ */
+
+static PyObject *
+connection_closed(ConnectionObject *self, void *closure)
+{
+ return PyBool_FromLong((long)(self->handle == INVALID_HANDLE_VALUE));
+}
+
+static PyObject *
+connection_readable(ConnectionObject *self, void *closure)
+{
+ return PyBool_FromLong((long)(self->flags & READABLE));
+}
+
+static PyObject *
+connection_writable(ConnectionObject *self, void *closure)
+{
+ return PyBool_FromLong((long)(self->flags & WRITABLE));
+}
+
+/*
+ * Tables
+ */
+
+static PyMethodDef connection_methods[] = {
+ {"send_bytes", (PyCFunction)connection_sendbytes, METH_VARARGS,
+ "send the byte data from a readable buffer-like object"},
+ {"recv_bytes", (PyCFunction)connection_recvbytes, METH_VARARGS,
+ "receive byte data as a string"},
+ {"recv_bytes_into",(PyCFunction)connection_recvbytes_into,METH_VARARGS,
+ "receive byte data into a writeable buffer-like object\n"
+ "returns the number of bytes read"},
+
+ {"send", (PyCFunction)connection_send_obj, METH_O,
+ "send a (picklable) object"},
+ {"recv", (PyCFunction)connection_recv_obj, METH_NOARGS,
+ "receive a (picklable) object"},
+
+ {"poll", (PyCFunction)connection_poll, METH_VARARGS,
+ "whether there is any input available to be read"},
+ {"fileno", (PyCFunction)connection_fileno, METH_NOARGS,
+ "file descriptor or handle of the connection"},
+ {"close", (PyCFunction)connection_close, METH_NOARGS,
+ "close the connection"},
+
+ {NULL} /* Sentinel */
+};
+
+static PyGetSetDef connection_getset[] = {
+ {"closed", (getter)connection_closed, NULL,
+ "True if the connection is closed", NULL},
+ {"readable", (getter)connection_readable, NULL,
+ "True if the connection is readable", NULL},
+ {"writable", (getter)connection_writable, NULL,
+ "True if the connection is writable", NULL},
+ {NULL}
+};
+
+/*
+ * Connection type
+ */
+
+PyDoc_STRVAR(connection_doc,
+ "Connection type whose constructor signature is\n\n"
+ " Connection(handle, readable=True, writable=True).\n\n"
+ "The constructor does *not* duplicate the handle.");
+
+PyTypeObject CONNECTION_TYPE = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ /* tp_name */ "_multiprocessing." CONNECTION_NAME,
+ /* tp_basicsize */ sizeof(ConnectionObject),
+ /* tp_itemsize */ 0,
+ /* tp_dealloc */ (destructor)connection_dealloc,
+ /* tp_print */ 0,
+ /* tp_getattr */ 0,
+ /* tp_setattr */ 0,
+ /* tp_compare */ 0,
+ /* tp_repr */ (reprfunc)connection_repr,
+ /* tp_as_number */ 0,
+ /* tp_as_sequence */ 0,
+ /* tp_as_mapping */ 0,
+ /* tp_hash */ 0,
+ /* tp_call */ 0,
+ /* tp_str */ 0,
+ /* tp_getattro */ 0,
+ /* tp_setattro */ 0,
+ /* tp_as_buffer */ 0,
+ /* tp_flags */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
+ Py_TPFLAGS_HAVE_WEAKREFS,
+ /* tp_doc */ connection_doc,
+ /* tp_traverse */ 0,
+ /* tp_clear */ 0,
+ /* tp_richcompare */ 0,
+ /* tp_weaklistoffset */ offsetof(ConnectionObject, weakreflist),
+ /* tp_iter */ 0,
+ /* tp_iternext */ 0,
+ /* tp_methods */ connection_methods,
+ /* tp_members */ 0,
+ /* tp_getset */ connection_getset,
+ /* tp_base */ 0,
+ /* tp_dict */ 0,
+ /* tp_descr_get */ 0,
+ /* tp_descr_set */ 0,
+ /* tp_dictoffset */ 0,
+ /* tp_init */ 0,
+ /* tp_alloc */ 0,
+ /* tp_new */ connection_new,
+};
+
+#endif /* CONNECTION_H */
diff --git a/Modules/_multiprocessing/multiprocessing.c b/Modules/_multiprocessing/multiprocessing.c
new file mode 100644
index 0000000..89c5717
--- /dev/null
+++ b/Modules/_multiprocessing/multiprocessing.c
@@ -0,0 +1,322 @@
+/*
+ * Extension module used by mutliprocessing package
+ *
+ * multiprocessing.c
+ *
+ * Copyright (c) 2006-2008, R Oudkerk --- see COPYING.txt
+ */
+
+#include "multiprocessing.h"
+
+PyObject *create_win32_namespace(void);
+
+PyObject *pickle_dumps, *pickle_loads, *pickle_protocol;
+PyObject *ProcessError, *BufferTooShort;
+
+/*
+ * Function which raises exceptions based on error codes
+ */
+
+PyObject *
+mp_SetError(PyObject *Type, int num)
+{
+ switch (num) {
+#ifdef MS_WINDOWS
+ case MP_STANDARD_ERROR:
+ if (Type == NULL)
+ Type = PyExc_WindowsError;
+ PyErr_SetExcFromWindowsErr(Type, 0);
+ break;
+ case MP_SOCKET_ERROR:
+ if (Type == NULL)
+ Type = PyExc_WindowsError;
+ PyErr_SetExcFromWindowsErr(Type, WSAGetLastError());
+ break;
+#else /* !MS_WINDOWS */
+ case MP_STANDARD_ERROR:
+ case MP_SOCKET_ERROR:
+ if (Type == NULL)
+ Type = PyExc_OSError;
+ PyErr_SetFromErrno(Type);
+ break;
+#endif /* !MS_WINDOWS */
+ case MP_MEMORY_ERROR:
+ PyErr_NoMemory();
+ break;
+ case MP_END_OF_FILE:
+ PyErr_SetNone(PyExc_EOFError);
+ break;
+ case MP_EARLY_END_OF_FILE:
+ PyErr_SetString(PyExc_IOError,
+ "got end of file during message");
+ break;
+ case MP_BAD_MESSAGE_LENGTH:
+ PyErr_SetString(PyExc_IOError, "bad message length");
+ break;
+ case MP_EXCEPTION_HAS_BEEN_SET:
+ break;
+ default:
+ PyErr_Format(PyExc_RuntimeError,
+ "unkown error number %d", num);
+ }
+ return NULL;
+}
+
+
+/*
+ * Windows only
+ */
+
+#ifdef MS_WINDOWS
+
+/* On Windows we set an event to signal Ctrl-C; compare with timemodule.c */
+
+HANDLE sigint_event = NULL;
+
+static BOOL WINAPI
+ProcessingCtrlHandler(DWORD dwCtrlType)
+{
+ SetEvent(sigint_event);
+ return FALSE;
+}
+
+/*
+ * Unix only
+ */
+
+#else /* !MS_WINDOWS */
+
+#if HAVE_FD_TRANSFER
+
+/* Functions for transferring file descriptors between processes.
+ Reimplements some of the functionality of the fdcred
+ module at http://www.mca-ltd.com/resources/fdcred_1.tgz. */
+
+static PyObject *
+multiprocessing_sendfd(PyObject *self, PyObject *args)
+{
+ int conn, fd, res;
+ char dummy_char;
+ char buf[CMSG_SPACE(sizeof(int))];
+ struct msghdr msg = {0};
+ struct iovec dummy_iov;
+ struct cmsghdr *cmsg;
+
+ if (!PyArg_ParseTuple(args, "ii", &conn, &fd))
+ return NULL;
+
+ dummy_iov.iov_base = &dummy_char;
+ dummy_iov.iov_len = 1;
+ msg.msg_control = buf;
+ msg.msg_controllen = sizeof(buf);
+ msg.msg_iov = &dummy_iov;
+ msg.msg_iovlen = 1;
+ cmsg = CMSG_FIRSTHDR(&msg);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(int));
+ msg.msg_controllen = cmsg->cmsg_len;
+ *(int*)CMSG_DATA(cmsg) = fd;
+
+ Py_BEGIN_ALLOW_THREADS
+ res = sendmsg(conn, &msg, 0);
+ Py_END_ALLOW_THREADS
+
+ if (res < 0)
+ return PyErr_SetFromErrno(PyExc_OSError);
+ Py_RETURN_NONE;
+}
+
+static PyObject *
+multiprocessing_recvfd(PyObject *self, PyObject *args)
+{
+ int conn, fd, res;
+ char dummy_char;
+ char buf[CMSG_SPACE(sizeof(int))];
+ struct msghdr msg = {0};
+ struct iovec dummy_iov;
+ struct cmsghdr *cmsg;
+
+ if (!PyArg_ParseTuple(args, "i", &conn))
+ return NULL;
+
+ dummy_iov.iov_base = &dummy_char;
+ dummy_iov.iov_len = 1;
+ msg.msg_control = buf;
+ msg.msg_controllen = sizeof(buf);
+ msg.msg_iov = &dummy_iov;
+ msg.msg_iovlen = 1;
+ cmsg = CMSG_FIRSTHDR(&msg);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(int));
+ msg.msg_controllen = cmsg->cmsg_len;
+
+ Py_BEGIN_ALLOW_THREADS
+ res = recvmsg(conn, &msg, 0);
+ Py_END_ALLOW_THREADS
+
+ if (res < 0)
+ return PyErr_SetFromErrno(PyExc_OSError);
+
+ fd = *(int*)CMSG_DATA(cmsg);
+ return Py_BuildValue("i", fd);
+}
+
+#endif /* HAVE_FD_TRANSFER */
+
+#endif /* !MS_WINDOWS */
+
+
+/*
+ * All platforms
+ */
+
+static PyObject*
+multiprocessing_address_of_buffer(PyObject *self, PyObject *obj)
+{
+ void *buffer;
+ Py_ssize_t buffer_len;
+
+ if (PyObject_AsWriteBuffer(obj, &buffer, &buffer_len) < 0)
+ return NULL;
+
+ return Py_BuildValue("N" F_PY_SSIZE_T,
+ PyLong_FromVoidPtr(buffer), buffer_len);
+}
+
+
+/*
+ * Function table
+ */
+
+static PyMethodDef module_methods[] = {
+ {"address_of_buffer", multiprocessing_address_of_buffer, METH_O,
+ "address_of_buffer(obj) -> int\n"
+ "Return address of obj assuming obj supports buffer inteface"},
+#if HAVE_FD_TRANSFER
+ {"sendfd", multiprocessing_sendfd, METH_VARARGS,
+ "sendfd(sockfd, fd) -> None\n"
+ "Send file descriptor given by fd over the unix domain socket\n"
+ "whose file decriptor is sockfd"},
+ {"recvfd", multiprocessing_recvfd, METH_VARARGS,
+ "recvfd(sockfd) -> fd\n"
+ "Receive a file descriptor over a unix domain socket\n"
+ "whose file decriptor is sockfd"},
+#endif
+ {NULL}
+};
+
+
+/*
+ * Initialize
+ */
+
+static struct PyModuleDef multiprocessing_module = {
+ PyModuleDef_HEAD_INIT,
+ "_multiprocessing",
+ NULL,
+ -1,
+ module_methods,
+ NULL,
+ NULL,
+ NULL,
+ NULL
+};
+
+
+PyObject*
+PyInit__multiprocessing(void)
+{
+ PyObject *module, *temp;
+
+ /* Initialize module */
+ module = PyModule_Create(&multiprocessing_module);
+ if (!module)
+ return NULL;
+
+ /* Get copy of objects from pickle */
+ temp = PyImport_ImportModule(PICKLE_MODULE);
+ if (!temp)
+ return NULL;
+ pickle_dumps = PyObject_GetAttrString(temp, "dumps");
+ pickle_loads = PyObject_GetAttrString(temp, "loads");
+ pickle_protocol = PyObject_GetAttrString(temp, "HIGHEST_PROTOCOL");
+ Py_XDECREF(temp);
+
+ /* Get copy of BufferTooShort */
+ temp = PyImport_ImportModule("multiprocessing");
+ if (!temp)
+ return NULL;
+ BufferTooShort = PyObject_GetAttrString(temp, "BufferTooShort");
+ Py_XDECREF(temp);
+
+ /* Add connection type to module */
+ if (PyType_Ready(&ConnectionType) < 0)
+ return NULL;
+ Py_INCREF(&ConnectionType);
+ PyModule_AddObject(module, "Connection", (PyObject*)&ConnectionType);
+
+#if defined(MS_WINDOWS) || HAVE_SEM_OPEN
+ /* Add SemLock type to module */
+ if (PyType_Ready(&SemLockType) < 0)
+ return NULL;
+ Py_INCREF(&SemLockType);
+ PyDict_SetItemString(SemLockType.tp_dict, "SEM_VALUE_MAX",
+ Py_BuildValue("i", SEM_VALUE_MAX));
+ PyModule_AddObject(module, "SemLock", (PyObject*)&SemLockType);
+#endif
+
+#ifdef MS_WINDOWS
+ /* Add PipeConnection to module */
+ if (PyType_Ready(&PipeConnectionType) < 0)
+ return NULL;
+ Py_INCREF(&PipeConnectionType);
+ PyModule_AddObject(module, "PipeConnection",
+ (PyObject*)&PipeConnectionType);
+
+ /* Initialize win32 class and add to multiprocessing */
+ temp = create_win32_namespace();
+ if (!temp)
+ return NULL;
+ PyModule_AddObject(module, "win32", temp);
+
+ /* Initialize the event handle used to signal Ctrl-C */
+ sigint_event = CreateEvent(NULL, TRUE, FALSE, NULL);
+ if (!sigint_event) {
+ PyErr_SetFromWindowsErr(0);
+ return NULL;
+ }
+ if (!SetConsoleCtrlHandler(ProcessingCtrlHandler, TRUE)) {
+ PyErr_SetFromWindowsErr(0);
+ return NULL;
+ }
+#endif
+
+ /* Add configuration macros */
+ temp = PyDict_New();
+ if (!temp)
+ return NULL;
+ if (PyModule_AddObject(module, "flags", temp) < 0)
+ return NULL;
+
+#define ADD_FLAG(name) \
+ if (PyDict_SetItemString(temp, #name, Py_BuildValue("i", name)) < 0) return NULL
+
+#ifdef HAVE_SEM_OPEN
+ ADD_FLAG(HAVE_SEM_OPEN);
+#endif
+#ifdef HAVE_SEM_TIMEDWAIT
+ ADD_FLAG(HAVE_SEM_TIMEDWAIT);
+#endif
+#ifdef HAVE_FD_TRANSFER
+ ADD_FLAG(HAVE_FD_TRANSFER);
+#endif
+#ifdef HAVE_BROKEN_SEM_GETVALUE
+ ADD_FLAG(HAVE_BROKEN_SEM_GETVALUE);
+#endif
+#ifdef HAVE_BROKEN_SEM_UNLINK
+ ADD_FLAG(HAVE_BROKEN_SEM_UNLINK);
+#endif
+ return module;
+}
diff --git a/Modules/_multiprocessing/multiprocessing.h b/Modules/_multiprocessing/multiprocessing.h
new file mode 100644
index 0000000..40f2c08
--- /dev/null
+++ b/Modules/_multiprocessing/multiprocessing.h
@@ -0,0 +1,163 @@
+#ifndef MULTIPROCESSING_H
+#define MULTIPROCESSING_H
+
+#define PY_SSIZE_T_CLEAN
+
+#include "Python.h"
+#include "structmember.h"
+#include "pythread.h"
+
+/*
+ * Platform includes and definitions
+ */
+
+#ifdef MS_WINDOWS
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# include <winsock2.h>
+# include <process.h> /* getpid() */
+# define SEM_HANDLE HANDLE
+# define SEM_VALUE_MAX LONG_MAX
+#else
+# include <fcntl.h> /* O_CREAT and O_EXCL */
+# include <sys/socket.h>
+# include <arpa/inet.h> /* htonl() and ntohl() */
+# if HAVE_SEM_OPEN
+# include <semaphore.h>
+ typedef sem_t *SEM_HANDLE;
+# endif
+# define HANDLE int
+# define SOCKET int
+# define BOOL int
+# define UINT32 uint32_t
+# define INT32 int32_t
+# define TRUE 1
+# define FALSE 0
+# define INVALID_HANDLE_VALUE (-1)
+#endif
+
+/*
+ * Make sure Py_ssize_t available
+ */
+
+#if PY_VERSION_HEX < 0x02050000 && !defined(PY_SSIZE_T_MIN)
+ typedef int Py_ssize_t;
+# define PY_SSIZE_T_MAX INT_MAX
+# define PY_SSIZE_T_MIN INT_MIN
+# define F_PY_SSIZE_T "i"
+# define PY_FORMAT_SIZE_T ""
+# define PyInt_FromSsize_t(n) PyInt_FromLong((long)n)
+#else
+# define F_PY_SSIZE_T "n"
+#endif
+
+/*
+ * Format codes
+ */
+
+#if SIZEOF_VOID_P == SIZEOF_LONG
+# define F_POINTER "k"
+# define T_POINTER T_ULONG
+#elif defined(HAVE_LONG_LONG) && (SIZEOF_VOID_P == SIZEOF_LONG_LONG)
+# define F_POINTER "K"
+# define T_POINTER T_ULONGLONG
+#else
+# error "can't find format code for unsigned integer of same size as void*"
+#endif
+
+#ifdef MS_WINDOWS
+# define F_HANDLE F_POINTER
+# define T_HANDLE T_POINTER
+# define F_SEM_HANDLE F_HANDLE
+# define T_SEM_HANDLE T_HANDLE
+# define F_DWORD "k"
+# define T_DWORD T_ULONG
+#else
+# define F_HANDLE "i"
+# define T_HANDLE T_INT
+# define F_SEM_HANDLE F_POINTER
+# define T_SEM_HANDLE T_POINTER
+#endif
+
+#if PY_VERSION_HEX >= 0x03000000
+# define F_RBUFFER "y"
+#else
+# define F_RBUFFER "s"
+#endif
+
+/*
+ * Error codes which can be returned by functions called without GIL
+ */
+
+#define MP_SUCCESS (0)
+#define MP_STANDARD_ERROR (-1)
+#define MP_MEMORY_ERROR (-1001)
+#define MP_END_OF_FILE (-1002)
+#define MP_EARLY_END_OF_FILE (-1003)
+#define MP_BAD_MESSAGE_LENGTH (-1004)
+#define MP_SOCKET_ERROR (-1005)
+#define MP_EXCEPTION_HAS_BEEN_SET (-1006)
+
+PyObject *mp_SetError(PyObject *Type, int num);
+
+/*
+ * Externs - not all will really exist on all platforms
+ */
+
+extern PyObject *pickle_dumps;
+extern PyObject *pickle_loads;
+extern PyObject *pickle_protocol;
+extern PyObject *BufferTooShort;
+extern PyTypeObject SemLockType;
+extern PyTypeObject ConnectionType;
+extern PyTypeObject PipeConnectionType;
+extern HANDLE sigint_event;
+
+/*
+ * Py3k compatibility
+ */
+
+#if PY_VERSION_HEX >= 0x03000000
+# define PICKLE_MODULE "pickle"
+# define FROM_FORMAT PyUnicode_FromFormat
+# define PyInt_FromLong PyLong_FromLong
+# define PyInt_FromSsize_t PyLong_FromSsize_t
+#else
+# define PICKLE_MODULE "cPickle"
+# define FROM_FORMAT PyString_FromFormat
+#endif
+
+#ifndef PyVarObject_HEAD_INIT
+# define PyVarObject_HEAD_INIT(type, size) PyObject_HEAD_INIT(type) size,
+#endif
+
+#ifndef Py_TPFLAGS_HAVE_WEAKREFS
+# define Py_TPFLAGS_HAVE_WEAKREFS 0
+#endif
+
+/*
+ * Connection definition
+ */
+
+#define CONNECTION_BUFFER_SIZE 1024
+
+typedef struct {
+ PyObject_HEAD
+ HANDLE handle;
+ int flags;
+ PyObject *weakreflist;
+ char buffer[CONNECTION_BUFFER_SIZE];
+} ConnectionObject;
+
+/*
+ * Miscellaneous
+ */
+
+#define MAX_MESSAGE_LENGTH 0x7fffffff
+
+#ifndef MIN
+# define MIN(x, y) ((x) < (y) ? x : y)
+# define MAX(x, y) ((x) > (y) ? x : y)
+#endif
+
+#endif /* MULTIPROCESSING_H */
diff --git a/Modules/_multiprocessing/pipe_connection.c b/Modules/_multiprocessing/pipe_connection.c
new file mode 100644
index 0000000..a96338f
--- /dev/null
+++ b/Modules/_multiprocessing/pipe_connection.c
@@ -0,0 +1,136 @@
+/*
+ * A type which wraps a pipe handle in message oriented mode
+ *
+ * pipe_connection.c
+ *
+ * Copyright (c) 2006-2008, R Oudkerk --- see COPYING.txt
+ */
+
+#include "multiprocessing.h"
+
+#define CLOSE(h) CloseHandle(h)
+
+/*
+ * Send string to the pipe; assumes in message oriented mode
+ */
+
+static Py_ssize_t
+conn_send_string(ConnectionObject *conn, char *string, size_t length)
+{
+ DWORD amount_written;
+
+ return WriteFile(conn->handle, string, length, &amount_written, NULL)
+ ? MP_SUCCESS : MP_STANDARD_ERROR;
+}
+
+/*
+ * Attempts to read into buffer, or if buffer too small into *newbuffer.
+ *
+ * Returns number of bytes read. Assumes in message oriented mode.
+ */
+
+static Py_ssize_t
+conn_recv_string(ConnectionObject *conn, char *buffer,
+ size_t buflength, char **newbuffer, size_t maxlength)
+{
+ DWORD left, length, full_length, err;
+
+ *newbuffer = NULL;
+
+ if (ReadFile(conn->handle, buffer, MIN(buflength, maxlength),
+ &length, NULL))
+ return length;
+
+ err = GetLastError();
+ if (err != ERROR_MORE_DATA) {
+ if (err == ERROR_BROKEN_PIPE)
+ return MP_END_OF_FILE;
+ return MP_STANDARD_ERROR;
+ }
+
+ if (!PeekNamedPipe(conn->handle, NULL, 0, NULL, NULL, &left))
+ return MP_STANDARD_ERROR;
+
+ full_length = length + left;
+ if (full_length > maxlength)
+ return MP_BAD_MESSAGE_LENGTH;
+
+ *newbuffer = PyMem_Malloc(full_length);
+ if (*newbuffer == NULL)
+ return MP_MEMORY_ERROR;
+
+ memcpy(*newbuffer, buffer, length);
+
+ if (ReadFile(conn->handle, *newbuffer+length, left, &length, NULL)) {
+ assert(length == left);
+ return full_length;
+ } else {
+ PyMem_Free(*newbuffer);
+ return MP_STANDARD_ERROR;
+ }
+}
+
+/*
+ * Check whether any data is available for reading
+ */
+
+#define conn_poll(conn, timeout) conn_poll_save(conn, timeout, _save)
+
+static int
+conn_poll_save(ConnectionObject *conn, double timeout, PyThreadState *_save)
+{
+ DWORD bytes, deadline, delay;
+ int difference, res;
+ BOOL block = FALSE;
+
+ if (!PeekNamedPipe(conn->handle, NULL, 0, NULL, &bytes, NULL))
+ return MP_STANDARD_ERROR;
+
+ if (timeout == 0.0)
+ return bytes > 0;
+
+ if (timeout < 0.0)
+ block = TRUE;
+ else
+ /* XXX does not check for overflow */
+ deadline = GetTickCount() + (DWORD)(1000 * timeout + 0.5);
+
+ Sleep(0);
+
+ for (delay = 1 ; ; delay += 1) {
+ if (!PeekNamedPipe(conn->handle, NULL, 0, NULL, &bytes, NULL))
+ return MP_STANDARD_ERROR;
+ else if (bytes > 0)
+ return TRUE;
+
+ if (!block) {
+ difference = deadline - GetTickCount();
+ if (difference < 0)
+ return FALSE;
+ if ((int)delay > difference)
+ delay = difference;
+ }
+
+ if (delay > 20)
+ delay = 20;
+
+ Sleep(delay);
+
+ /* check for signals */
+ Py_BLOCK_THREADS
+ res = PyErr_CheckSignals();
+ Py_UNBLOCK_THREADS
+
+ if (res)
+ return MP_EXCEPTION_HAS_BEEN_SET;
+ }
+}
+
+/*
+ * "connection.h" defines the PipeConnection type using the definitions above
+ */
+
+#define CONNECTION_NAME "PipeConnection"
+#define CONNECTION_TYPE PipeConnectionType
+
+#include "connection.h"
diff --git a/Modules/_multiprocessing/semaphore.c b/Modules/_multiprocessing/semaphore.c
new file mode 100644
index 0000000..a7ffd1e
--- /dev/null
+++ b/Modules/_multiprocessing/semaphore.c
@@ -0,0 +1,625 @@
+/*
+ * A type which wraps a semaphore
+ *
+ * semaphore.c
+ *
+ * Copyright (c) 2006-2008, R Oudkerk --- see COPYING.txt
+ */
+
+#include "multiprocessing.h"
+
+enum { RECURSIVE_MUTEX, SEMAPHORE };
+
+typedef struct {
+ PyObject_HEAD
+ SEM_HANDLE handle;
+ long last_tid;
+ int count;
+ int maxvalue;
+ int kind;
+} SemLockObject;
+
+#define ISMINE(o) (o->count > 0 && PyThread_get_thread_ident() == o->last_tid)
+
+
+#ifdef MS_WINDOWS
+
+/*
+ * Windows definitions
+ */
+
+#define SEM_FAILED NULL
+
+#define SEM_CLEAR_ERROR() SetLastError(0)
+#define SEM_GET_LAST_ERROR() GetLastError()
+#define SEM_CREATE(name, val, max) CreateSemaphore(NULL, val, max, NULL)
+#define SEM_CLOSE(sem) (CloseHandle(sem) ? 0 : -1)
+#define SEM_GETVALUE(sem, pval) _GetSemaphoreValue(sem, pval)
+#define SEM_UNLINK(name) 0
+
+static int
+_GetSemaphoreValue(HANDLE handle, long *value)
+{
+ long previous;
+
+ switch (WaitForSingleObject(handle, 0)) {
+ case WAIT_OBJECT_0:
+ if (!ReleaseSemaphore(handle, 1, &previous))
+ return MP_STANDARD_ERROR;
+ *value = previous + 1;
+ return 0;
+ case WAIT_TIMEOUT:
+ *value = 0;
+ return 0;
+ default:
+ return MP_STANDARD_ERROR;
+ }
+}
+
+static PyObject *
+semlock_acquire(SemLockObject *self, PyObject *args, PyObject *kwds)
+{
+ int blocking = 1;
+ double timeout;
+ PyObject *timeout_obj = Py_None;
+ DWORD res, full_msecs, msecs, start, ticks;
+
+ static char *kwlist[] = {"block", "timeout", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "|iO", kwlist,
+ &blocking, &timeout_obj))
+ return NULL;
+
+ /* calculate timeout */
+ if (!blocking) {
+ full_msecs = 0;
+ } else if (timeout_obj == Py_None) {
+ full_msecs = INFINITE;
+ } else {
+ timeout = PyFloat_AsDouble(timeout_obj);
+ if (PyErr_Occurred())
+ return NULL;
+ timeout *= 1000.0; /* convert to millisecs */
+ if (timeout < 0.0) {
+ timeout = 0.0;
+ } else if (timeout >= 0.5 * INFINITE) { /* 25 days */
+ PyErr_SetString(PyExc_OverflowError,
+ "timeout is too large");
+ return NULL;
+ }
+ full_msecs = (DWORD)(timeout + 0.5);
+ }
+
+ /* check whether we already own the lock */
+ if (self->kind == RECURSIVE_MUTEX && ISMINE(self)) {
+ ++self->count;
+ Py_RETURN_TRUE;
+ }
+
+ /* check whether we can acquire without blocking */
+ if (WaitForSingleObject(self->handle, 0) == WAIT_OBJECT_0) {
+ self->last_tid = GetCurrentThreadId();
+ ++self->count;
+ Py_RETURN_TRUE;
+ }
+
+ msecs = full_msecs;
+ start = GetTickCount();
+
+ for ( ; ; ) {
+ HANDLE handles[2] = {self->handle, sigint_event};
+
+ /* do the wait */
+ Py_BEGIN_ALLOW_THREADS
+ ResetEvent(sigint_event);
+ res = WaitForMultipleObjects(2, handles, FALSE, msecs);
+ Py_END_ALLOW_THREADS
+
+ /* handle result */
+ if (res != WAIT_OBJECT_0 + 1)
+ break;
+
+ /* got SIGINT so give signal handler a chance to run */
+ Sleep(1);
+
+ /* if this is main thread let KeyboardInterrupt be raised */
+ if (PyErr_CheckSignals())
+ return NULL;
+
+ /* recalculate timeout */
+ if (msecs != INFINITE) {
+ ticks = GetTickCount();
+ if ((DWORD)(ticks - start) >= full_msecs)
+ Py_RETURN_FALSE;
+ msecs = full_msecs - (ticks - start);
+ }
+ }
+
+ /* handle result */
+ switch (res) {
+ case WAIT_TIMEOUT:
+ Py_RETURN_FALSE;
+ case WAIT_OBJECT_0:
+ self->last_tid = GetCurrentThreadId();
+ ++self->count;
+ Py_RETURN_TRUE;
+ case WAIT_FAILED:
+ return PyErr_SetFromWindowsErr(0);
+ default:
+ PyErr_Format(PyExc_RuntimeError, "WaitForSingleObject() or "
+ "WaitForMultipleObjects() gave unrecognized "
+ "value %d", res);
+ return NULL;
+ }
+}
+
+static PyObject *
+semlock_release(SemLockObject *self, PyObject *args)
+{
+ if (self->kind == RECURSIVE_MUTEX) {
+ if (!ISMINE(self)) {
+ PyErr_SetString(PyExc_AssertionError, "attempt to "
+ "release recursive lock not owned "
+ "by thread");
+ return NULL;
+ }
+ if (self->count > 1) {
+ --self->count;
+ Py_RETURN_NONE;
+ }
+ assert(self->count == 1);
+ }
+
+ if (!ReleaseSemaphore(self->handle, 1, NULL)) {
+ if (GetLastError() == ERROR_TOO_MANY_POSTS) {
+ PyErr_SetString(PyExc_ValueError, "semaphore or lock "
+ "released too many times");
+ return NULL;
+ } else {
+ return PyErr_SetFromWindowsErr(0);
+ }
+ }
+
+ --self->count;
+ Py_RETURN_NONE;
+}
+
+#else /* !MS_WINDOWS */
+
+/*
+ * Unix definitions
+ */
+
+#define SEM_CLEAR_ERROR()
+#define SEM_GET_LAST_ERROR() 0
+#define SEM_CREATE(name, val, max) sem_open(name, O_CREAT | O_EXCL, 0600, val)
+#define SEM_CLOSE(sem) sem_close(sem)
+#define SEM_GETVALUE(sem, pval) sem_getvalue(sem, pval)
+#define SEM_UNLINK(name) sem_unlink(name)
+
+#if HAVE_BROKEN_SEM_UNLINK
+# define sem_unlink(name) 0
+#endif
+
+#if !HAVE_SEM_TIMEDWAIT
+# define sem_timedwait(sem,deadline) sem_timedwait_save(sem,deadline,_save)
+
+int
+sem_timedwait_save(sem_t *sem, struct timespec *deadline, PyThreadState *_save)
+{
+ int res;
+ unsigned long delay, difference;
+ struct timeval now, tvdeadline, tvdelay;
+
+ errno = 0;
+ tvdeadline.tv_sec = deadline->tv_sec;
+ tvdeadline.tv_usec = deadline->tv_nsec / 1000;
+
+ for (delay = 0 ; ; delay += 1000) {
+ /* poll */
+ if (sem_trywait(sem) == 0)
+ return 0;
+ else if (errno != EAGAIN)
+ return MP_STANDARD_ERROR;
+
+ /* get current time */
+ if (gettimeofday(&now, NULL) < 0)
+ return MP_STANDARD_ERROR;
+
+ /* check for timeout */
+ if (tvdeadline.tv_sec < now.tv_sec ||
+ (tvdeadline.tv_sec == now.tv_sec &&
+ tvdeadline.tv_usec <= now.tv_usec)) {
+ errno = ETIMEDOUT;
+ return MP_STANDARD_ERROR;
+ }
+
+ /* calculate how much time is left */
+ difference = (tvdeadline.tv_sec - now.tv_sec) * 1000000 +
+ (tvdeadline.tv_usec - now.tv_usec);
+
+ /* check delay not too long -- maximum is 20 msecs */
+ if (delay > 20000)
+ delay = 20000;
+ if (delay > difference)
+ delay = difference;
+
+ /* sleep */
+ tvdelay.tv_sec = delay / 1000000;
+ tvdelay.tv_usec = delay % 1000000;
+ if (select(0, NULL, NULL, NULL, &tvdelay) < 0)
+ return MP_STANDARD_ERROR;
+
+ /* check for signals */
+ Py_BLOCK_THREADS
+ res = PyErr_CheckSignals();
+ Py_UNBLOCK_THREADS
+
+ if (res) {
+ errno = EINTR;
+ return MP_EXCEPTION_HAS_BEEN_SET;
+ }
+ }
+}
+
+#endif /* !HAVE_SEM_TIMEDWAIT */
+
+static PyObject *
+semlock_acquire(SemLockObject *self, PyObject *args, PyObject *kwds)
+{
+ int blocking = 1, res;
+ double timeout;
+ PyObject *timeout_obj = Py_None;
+ struct timespec deadline = {0};
+ struct timeval now;
+ long sec, nsec;
+
+ static char *kwlist[] = {"block", "timeout", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "|iO", kwlist,
+ &blocking, &timeout_obj))
+ return NULL;
+
+ if (self->kind == RECURSIVE_MUTEX && ISMINE(self)) {
+ ++self->count;
+ Py_RETURN_TRUE;
+ }
+
+ if (timeout_obj != Py_None) {
+ timeout = PyFloat_AsDouble(timeout_obj);
+ if (PyErr_Occurred())
+ return NULL;
+ if (timeout < 0.0)
+ timeout = 0.0;
+
+ if (gettimeofday(&now, NULL) < 0) {
+ PyErr_SetFromErrno(PyExc_OSError);
+ return NULL;
+ }
+ sec = (long) timeout;
+ nsec = (long) (1e9 * (timeout - sec) + 0.5);
+ deadline.tv_sec = now.tv_sec + sec;
+ deadline.tv_nsec = now.tv_usec * 1000 + nsec;
+ deadline.tv_sec += (deadline.tv_nsec / 1000000000);
+ deadline.tv_nsec %= 1000000000;
+ }
+
+ do {
+ Py_BEGIN_ALLOW_THREADS
+ if (blocking && timeout_obj == Py_None)
+ res = sem_wait(self->handle);
+ else if (!blocking)
+ res = sem_trywait(self->handle);
+ else
+ res = sem_timedwait(self->handle, &deadline);
+ Py_END_ALLOW_THREADS
+ if (res == MP_EXCEPTION_HAS_BEEN_SET)
+ break;
+ } while (res < 0 && errno == EINTR && !PyErr_CheckSignals());
+
+ if (res < 0) {
+ if (errno == EAGAIN || errno == ETIMEDOUT)
+ Py_RETURN_FALSE;
+ else if (errno == EINTR)
+ return NULL;
+ else
+ return PyErr_SetFromErrno(PyExc_OSError);
+ }
+
+ ++self->count;
+ self->last_tid = PyThread_get_thread_ident();
+
+ Py_RETURN_TRUE;
+}
+
+static PyObject *
+semlock_release(SemLockObject *self, PyObject *args)
+{
+ if (self->kind == RECURSIVE_MUTEX) {
+ if (!ISMINE(self)) {
+ PyErr_SetString(PyExc_AssertionError, "attempt to "
+ "release recursive lock not owned "
+ "by thread");
+ return NULL;
+ }
+ if (self->count > 1) {
+ --self->count;
+ Py_RETURN_NONE;
+ }
+ assert(self->count == 1);
+ } else {
+#if HAVE_BROKEN_SEM_GETVALUE
+ /* We will only check properly the maxvalue == 1 case */
+ if (self->maxvalue == 1) {
+ /* make sure that already locked */
+ if (sem_trywait(self->handle) < 0) {
+ if (errno != EAGAIN) {
+ PyErr_SetFromErrno(PyExc_OSError);
+ return NULL;
+ }
+ /* it is already locked as expected */
+ } else {
+ /* it was not locked so undo wait and raise */
+ if (sem_post(self->handle) < 0) {
+ PyErr_SetFromErrno(PyExc_OSError);
+ return NULL;
+ }
+ PyErr_SetString(PyExc_ValueError, "semaphore "
+ "or lock released too many "
+ "times");
+ return NULL;
+ }
+ }
+#else
+ int sval;
+
+ /* This check is not an absolute guarantee that the semaphore
+ does not rise above maxvalue. */
+ if (sem_getvalue(self->handle, &sval) < 0) {
+ return PyErr_SetFromErrno(PyExc_OSError);
+ } else if (sval >= self->maxvalue) {
+ PyErr_SetString(PyExc_ValueError, "semaphore or lock "
+ "released too many times");
+ return NULL;
+ }
+#endif
+ }
+
+ if (sem_post(self->handle) < 0)
+ return PyErr_SetFromErrno(PyExc_OSError);
+
+ --self->count;
+ Py_RETURN_NONE;
+}
+
+#endif /* !MS_WINDOWS */
+
+/*
+ * All platforms
+ */
+
+static PyObject *
+newsemlockobject(PyTypeObject *type, SEM_HANDLE handle, int kind, int maxvalue)
+{
+ SemLockObject *self;
+
+ self = PyObject_New(SemLockObject, type);
+ if (!self)
+ return NULL;
+ self->handle = handle;
+ self->kind = kind;
+ self->count = 0;
+ self->last_tid = 0;
+ self->maxvalue = maxvalue;
+ return (PyObject*)self;
+}
+
+static PyObject *
+semlock_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+ char buffer[256];
+ SEM_HANDLE handle = SEM_FAILED;
+ int kind, maxvalue, value;
+ PyObject *result;
+ static char *kwlist[] = {"kind", "value", "maxvalue", NULL};
+ static int counter = 0;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "iii", kwlist,
+ &kind, &value, &maxvalue))
+ return NULL;
+
+ if (kind != RECURSIVE_MUTEX && kind != SEMAPHORE) {
+ PyErr_SetString(PyExc_ValueError, "unrecognized kind");
+ return NULL;
+ }
+
+ PyOS_snprintf(buffer, sizeof(buffer), "/mp%d-%d", getpid(), counter++);
+
+ SEM_CLEAR_ERROR();
+ handle = SEM_CREATE(buffer, value, maxvalue);
+ /* On Windows we should fail if GetLastError()==ERROR_ALREADY_EXISTS */
+ if (handle == SEM_FAILED || SEM_GET_LAST_ERROR() != 0)
+ goto failure;
+
+ if (SEM_UNLINK(buffer) < 0)
+ goto failure;
+
+ result = newsemlockobject(type, handle, kind, maxvalue);
+ if (!result)
+ goto failure;
+
+ return result;
+
+ failure:
+ if (handle != SEM_FAILED)
+ SEM_CLOSE(handle);
+ mp_SetError(NULL, MP_STANDARD_ERROR);
+ return NULL;
+}
+
+static PyObject *
+semlock_rebuild(PyTypeObject *type, PyObject *args)
+{
+ SEM_HANDLE handle;
+ int kind, maxvalue;
+
+ if (!PyArg_ParseTuple(args, F_SEM_HANDLE "ii",
+ &handle, &kind, &maxvalue))
+ return NULL;
+
+ return newsemlockobject(type, handle, kind, maxvalue);
+}
+
+static void
+semlock_dealloc(SemLockObject* self)
+{
+ if (self->handle != SEM_FAILED)
+ SEM_CLOSE(self->handle);
+ PyObject_Del(self);
+}
+
+static PyObject *
+semlock_count(SemLockObject *self)
+{
+ return PyInt_FromLong((long)self->count);
+}
+
+static PyObject *
+semlock_ismine(SemLockObject *self)
+{
+ /* only makes sense for a lock */
+ return PyBool_FromLong(ISMINE(self));
+}
+
+static PyObject *
+semlock_getvalue(SemLockObject *self)
+{
+#if HAVE_BROKEN_SEM_GETVALUE
+ PyErr_SetNone(PyExc_NotImplementedError);
+ return NULL;
+#else
+ int sval;
+ if (SEM_GETVALUE(self->handle, &sval) < 0)
+ return mp_SetError(NULL, MP_STANDARD_ERROR);
+ /* some posix implementations use negative numbers to indicate
+ the number of waiting threads */
+ if (sval < 0)
+ sval = 0;
+ return PyInt_FromLong((long)sval);
+#endif
+}
+
+static PyObject *
+semlock_iszero(SemLockObject *self)
+{
+ int sval;
+#if HAVE_BROKEN_SEM_GETVALUE
+ if (sem_trywait(self->handle) < 0) {
+ if (errno == EAGAIN)
+ Py_RETURN_TRUE;
+ return mp_SetError(NULL, MP_STANDARD_ERROR);
+ } else {
+ if (sem_post(self->handle) < 0)
+ return mp_SetError(NULL, MP_STANDARD_ERROR);
+ Py_RETURN_FALSE;
+ }
+#else
+ if (SEM_GETVALUE(self->handle, &sval) < 0)
+ return mp_SetError(NULL, MP_STANDARD_ERROR);
+ return PyBool_FromLong((long)sval == 0);
+#endif
+}
+
+static PyObject *
+semlock_afterfork(SemLockObject *self)
+{
+ self->count = 0;
+ Py_RETURN_NONE;
+}
+
+/*
+ * Semaphore methods
+ */
+
+static PyMethodDef semlock_methods[] = {
+ {"acquire", (PyCFunction)semlock_acquire, METH_VARARGS | METH_KEYWORDS,
+ "acquire the semaphore/lock"},
+ {"release", (PyCFunction)semlock_release, METH_NOARGS,
+ "release the semaphore/lock"},
+ {"__enter__", (PyCFunction)semlock_acquire, METH_VARARGS,
+ "enter the semaphore/lock"},
+ {"__exit__", (PyCFunction)semlock_release, METH_VARARGS,
+ "exit the semaphore/lock"},
+ {"_count", (PyCFunction)semlock_count, METH_NOARGS,
+ "num of `acquire()`s minus num of `release()`s for this process"},
+ {"_is_mine", (PyCFunction)semlock_ismine, METH_NOARGS,
+ "whether the lock is owned by this thread"},
+ {"_get_value", (PyCFunction)semlock_getvalue, METH_NOARGS,
+ "get the value of the semaphore"},
+ {"_is_zero", (PyCFunction)semlock_iszero, METH_NOARGS,
+ "returns whether semaphore has value zero"},
+ {"_rebuild", (PyCFunction)semlock_rebuild, METH_VARARGS | METH_CLASS,
+ ""},
+ {"_after_fork", (PyCFunction)semlock_afterfork, METH_NOARGS,
+ "rezero the net acquisition count after fork()"},
+ {NULL}
+};
+
+/*
+ * Member table
+ */
+
+static PyMemberDef semlock_members[] = {
+ {"handle", T_SEM_HANDLE, offsetof(SemLockObject, handle), READONLY,
+ ""},
+ {"kind", T_INT, offsetof(SemLockObject, kind), READONLY,
+ ""},
+ {"maxvalue", T_INT, offsetof(SemLockObject, maxvalue), READONLY,
+ ""},
+ {NULL}
+};
+
+/*
+ * Semaphore type
+ */
+
+PyTypeObject SemLockType = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ /* tp_name */ "_multiprocessing.SemLock",
+ /* tp_basicsize */ sizeof(SemLockObject),
+ /* tp_itemsize */ 0,
+ /* tp_dealloc */ (destructor)semlock_dealloc,
+ /* tp_print */ 0,
+ /* 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 */ 0,
+ /* tp_call */ 0,
+ /* tp_str */ 0,
+ /* tp_getattro */ 0,
+ /* tp_setattro */ 0,
+ /* tp_as_buffer */ 0,
+ /* tp_flags */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
+ /* tp_doc */ "Semaphore/Mutex type",
+ /* tp_traverse */ 0,
+ /* tp_clear */ 0,
+ /* tp_richcompare */ 0,
+ /* tp_weaklistoffset */ 0,
+ /* tp_iter */ 0,
+ /* tp_iternext */ 0,
+ /* tp_methods */ semlock_methods,
+ /* tp_members */ semlock_members,
+ /* tp_getset */ 0,
+ /* tp_base */ 0,
+ /* tp_dict */ 0,
+ /* tp_descr_get */ 0,
+ /* tp_descr_set */ 0,
+ /* tp_dictoffset */ 0,
+ /* tp_init */ 0,
+ /* tp_alloc */ 0,
+ /* tp_new */ semlock_new,
+};
diff --git a/Modules/_multiprocessing/socket_connection.c b/Modules/_multiprocessing/socket_connection.c
new file mode 100644
index 0000000..a6ff9dd
--- /dev/null
+++ b/Modules/_multiprocessing/socket_connection.c
@@ -0,0 +1,180 @@
+/*
+ * A type which wraps a socket
+ *
+ * socket_connection.c
+ *
+ * Copyright (c) 2006-2008, R Oudkerk --- see COPYING.txt
+ */
+
+#include "multiprocessing.h"
+
+#ifdef MS_WINDOWS
+# define WRITE(h, buffer, length) send((SOCKET)h, buffer, length, 0)
+# define READ(h, buffer, length) recv((SOCKET)h, buffer, length, 0)
+# define CLOSE(h) closesocket((SOCKET)h)
+#else
+# define WRITE(h, buffer, length) write(h, buffer, length)
+# define READ(h, buffer, length) read(h, buffer, length)
+# define CLOSE(h) close(h)
+#endif
+
+/*
+ * Send string to file descriptor
+ */
+
+static Py_ssize_t
+_conn_sendall(HANDLE h, char *string, size_t length)
+{
+ char *p = string;
+ Py_ssize_t res;
+
+ while (length > 0) {
+ res = WRITE(h, p, length);
+ if (res < 0)
+ return MP_SOCKET_ERROR;
+ length -= res;
+ p += res;
+ }
+
+ return MP_SUCCESS;
+}
+
+/*
+ * Receive string of exact length from file descriptor
+ */
+
+static Py_ssize_t
+_conn_recvall(HANDLE h, char *buffer, size_t length)
+{
+ size_t remaining = length;
+ Py_ssize_t temp;
+ char *p = buffer;
+
+ while (remaining > 0) {
+ temp = READ(h, p, remaining);
+ if (temp <= 0) {
+ if (temp == 0)
+ return remaining == length ?
+ MP_END_OF_FILE : MP_EARLY_END_OF_FILE;
+ else
+ return temp;
+ }
+ remaining -= temp;
+ p += temp;
+ }
+
+ return MP_SUCCESS;
+}
+
+/*
+ * Send a string prepended by the string length in network byte order
+ */
+
+static Py_ssize_t
+conn_send_string(ConnectionObject *conn, char *string, size_t length)
+{
+ /* The "header" of the message is a 32 bit unsigned number (in
+ network order) which specifies the length of the "body". If
+ the message is shorter than about 16kb then it is quicker to
+ combine the "header" and the "body" of the message and send
+ them at once. */
+ if (length < (16*1024)) {
+ char *message;
+ int res;
+
+ message = PyMem_Malloc(length+4);
+ if (message == NULL)
+ return MP_MEMORY_ERROR;
+
+ *(UINT32*)message = htonl((UINT32)length);
+ memcpy(message+4, string, length);
+ res = _conn_sendall(conn->handle, message, length+4);
+ PyMem_Free(message);
+ return res;
+ } else {
+ UINT32 lenbuff;
+
+ if (length > MAX_MESSAGE_LENGTH)
+ return MP_BAD_MESSAGE_LENGTH;
+
+ lenbuff = htonl((UINT32)length);
+ return _conn_sendall(conn->handle, (char*)&lenbuff, 4) ||
+ _conn_sendall(conn->handle, string, length);
+ }
+}
+
+/*
+ * Attempts to read into buffer, or failing that into *newbuffer
+ *
+ * Returns number of bytes read.
+ */
+
+static Py_ssize_t
+conn_recv_string(ConnectionObject *conn, char *buffer,
+ size_t buflength, char **newbuffer, size_t maxlength)
+{
+ int res;
+ UINT32 ulength;
+
+ *newbuffer = NULL;
+
+ res = _conn_recvall(conn->handle, (char*)&ulength, 4);
+ if (res < 0)
+ return res;
+
+ ulength = ntohl(ulength);
+ if (ulength > maxlength)
+ return MP_BAD_MESSAGE_LENGTH;
+
+ if (ulength <= buflength) {
+ res = _conn_recvall(conn->handle, buffer, (size_t)ulength);
+ return res < 0 ? res : ulength;
+ } else {
+ *newbuffer = PyMem_Malloc((size_t)ulength);
+ if (*newbuffer == NULL)
+ return MP_MEMORY_ERROR;
+ res = _conn_recvall(conn->handle, *newbuffer, (size_t)ulength);
+ return res < 0 ? (Py_ssize_t)res : (Py_ssize_t)ulength;
+ }
+}
+
+/*
+ * Check whether any data is available for reading -- neg timeout blocks
+ */
+
+static int
+conn_poll(ConnectionObject *conn, double timeout)
+{
+ int res;
+ fd_set rfds;
+
+ FD_ZERO(&rfds);
+ FD_SET((SOCKET)conn->handle, &rfds);
+
+ if (timeout < 0.0) {
+ res = select((int)conn->handle+1, &rfds, NULL, NULL, NULL);
+ } else {
+ struct timeval tv;
+ tv.tv_sec = (long)timeout;
+ tv.tv_usec = (long)((timeout - tv.tv_sec) * 1e6 + 0.5);
+ res = select((int)conn->handle+1, &rfds, NULL, NULL, &tv);
+ }
+
+ if (res < 0) {
+ return MP_SOCKET_ERROR;
+ } else if (FD_ISSET(conn->handle, &rfds)) {
+ return TRUE;
+ } else {
+ assert(res == 0);
+ return FALSE;
+ }
+}
+
+/*
+ * "connection.h" defines the Connection type using defs above
+ */
+
+#define CONNECTION_NAME "Connection"
+#define CONNECTION_TYPE ConnectionType
+
+#include "connection.h"
diff --git a/Modules/_multiprocessing/win32_functions.c b/Modules/_multiprocessing/win32_functions.c
new file mode 100644
index 0000000..2bb1134
--- /dev/null
+++ b/Modules/_multiprocessing/win32_functions.c
@@ -0,0 +1,260 @@
+/*
+ * Win32 functions used by multiprocessing package
+ *
+ * win32_functions.c
+ *
+ * Copyright (c) 2006-2008, R Oudkerk --- see COPYING.txt
+ */
+
+#include "multiprocessing.h"
+
+
+#define WIN32_FUNCTION(func) \
+ {#func, (PyCFunction)win32_ ## func, METH_VARARGS | METH_STATIC, ""}
+
+#define WIN32_CONSTANT(fmt, con) \
+ PyDict_SetItemString(Win32Type.tp_dict, #con, Py_BuildValue(fmt, con))
+
+
+static PyObject *
+win32_CloseHandle(PyObject *self, PyObject *args)
+{
+ HANDLE hObject;
+ BOOL success;
+
+ if (!PyArg_ParseTuple(args, F_HANDLE, &hObject))
+ return NULL;
+
+ Py_BEGIN_ALLOW_THREADS
+ success = CloseHandle(hObject);
+ Py_END_ALLOW_THREADS
+
+ if (!success)
+ return PyErr_SetFromWindowsErr(0);
+
+ Py_RETURN_NONE;
+}
+
+static PyObject *
+win32_ConnectNamedPipe(PyObject *self, PyObject *args)
+{
+ HANDLE hNamedPipe;
+ LPOVERLAPPED lpOverlapped;
+ BOOL success;
+
+ if (!PyArg_ParseTuple(args, F_HANDLE F_POINTER,
+ &hNamedPipe, &lpOverlapped))
+ return NULL;
+
+ Py_BEGIN_ALLOW_THREADS
+ success = ConnectNamedPipe(hNamedPipe, lpOverlapped);
+ Py_END_ALLOW_THREADS
+
+ if (!success)
+ return PyErr_SetFromWindowsErr(0);
+
+ Py_RETURN_NONE;
+}
+
+static PyObject *
+win32_CreateFile(PyObject *self, PyObject *args)
+{
+ LPCTSTR lpFileName;
+ DWORD dwDesiredAccess;
+ DWORD dwShareMode;
+ LPSECURITY_ATTRIBUTES lpSecurityAttributes;
+ DWORD dwCreationDisposition;
+ DWORD dwFlagsAndAttributes;
+ HANDLE hTemplateFile;
+ HANDLE handle;
+
+ if (!PyArg_ParseTuple(args, "s" F_DWORD F_DWORD F_POINTER
+ F_DWORD F_DWORD F_HANDLE,
+ &lpFileName, &dwDesiredAccess, &dwShareMode,
+ &lpSecurityAttributes, &dwCreationDisposition,
+ &dwFlagsAndAttributes, &hTemplateFile))
+ return NULL;
+
+ Py_BEGIN_ALLOW_THREADS
+ handle = CreateFile(lpFileName, dwDesiredAccess,
+ dwShareMode, lpSecurityAttributes,
+ dwCreationDisposition,
+ dwFlagsAndAttributes, hTemplateFile);
+ Py_END_ALLOW_THREADS
+
+ if (handle == INVALID_HANDLE_VALUE)
+ return PyErr_SetFromWindowsErr(0);
+
+ return Py_BuildValue(F_HANDLE, handle);
+}
+
+static PyObject *
+win32_CreateNamedPipe(PyObject *self, PyObject *args)
+{
+ LPCTSTR lpName;
+ DWORD dwOpenMode;
+ DWORD dwPipeMode;
+ DWORD nMaxInstances;
+ DWORD nOutBufferSize;
+ DWORD nInBufferSize;
+ DWORD nDefaultTimeOut;
+ LPSECURITY_ATTRIBUTES lpSecurityAttributes;
+ HANDLE handle;
+
+ if (!PyArg_ParseTuple(args, "s" F_DWORD F_DWORD F_DWORD
+ F_DWORD F_DWORD F_DWORD F_POINTER,
+ &lpName, &dwOpenMode, &dwPipeMode,
+ &nMaxInstances, &nOutBufferSize,
+ &nInBufferSize, &nDefaultTimeOut,
+ &lpSecurityAttributes))
+ return NULL;
+
+ Py_BEGIN_ALLOW_THREADS
+ handle = CreateNamedPipe(lpName, dwOpenMode, dwPipeMode,
+ nMaxInstances, nOutBufferSize,
+ nInBufferSize, nDefaultTimeOut,
+ lpSecurityAttributes);
+ Py_END_ALLOW_THREADS
+
+ if (handle == INVALID_HANDLE_VALUE)
+ return PyErr_SetFromWindowsErr(0);
+
+ return Py_BuildValue(F_HANDLE, handle);
+}
+
+static PyObject *
+win32_ExitProcess(PyObject *self, PyObject *args)
+{
+ UINT uExitCode;
+
+ if (!PyArg_ParseTuple(args, "I", &uExitCode))
+ return NULL;
+
+ ExitProcess(uExitCode);
+
+ return NULL;
+}
+
+static PyObject *
+win32_GetLastError(PyObject *self, PyObject *args)
+{
+ return Py_BuildValue(F_DWORD, GetLastError());
+}
+
+static PyObject *
+win32_OpenProcess(PyObject *self, PyObject *args)
+{
+ DWORD dwDesiredAccess;
+ BOOL bInheritHandle;
+ DWORD dwProcessId;
+ HANDLE handle;
+
+ if (!PyArg_ParseTuple(args, F_DWORD "i" F_DWORD,
+ &dwDesiredAccess, &bInheritHandle, &dwProcessId))
+ return NULL;
+
+ handle = OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId);
+ if (handle == NULL)
+ return PyErr_SetFromWindowsErr(0);
+
+ return Py_BuildValue(F_HANDLE, handle);
+}
+
+static PyObject *
+win32_SetNamedPipeHandleState(PyObject *self, PyObject *args)
+{
+ HANDLE hNamedPipe;
+ PyObject *oArgs[3];
+ DWORD dwArgs[3], *pArgs[3] = {NULL, NULL, NULL};
+ int i;
+
+ if (!PyArg_ParseTuple(args, F_HANDLE "OOO",
+ &hNamedPipe, &oArgs[0], &oArgs[1], &oArgs[2]))
+ return NULL;
+
+ PyErr_Clear();
+
+ for (i = 0 ; i < 3 ; i++) {
+ if (oArgs[i] != Py_None) {
+ dwArgs[i] = PyInt_AsUnsignedLongMask(oArgs[i]);
+ if (PyErr_Occurred())
+ return NULL;
+ pArgs[i] = &dwArgs[i];
+ }
+ }
+
+ if (!SetNamedPipeHandleState(hNamedPipe, pArgs[0], pArgs[1], pArgs[2]))
+ return PyErr_SetFromWindowsErr(0);
+
+ Py_RETURN_NONE;
+}
+
+static PyObject *
+win32_WaitNamedPipe(PyObject *self, PyObject *args)
+{
+ LPCTSTR lpNamedPipeName;
+ DWORD nTimeOut;
+ BOOL success;
+
+ if (!PyArg_ParseTuple(args, "s" F_DWORD, &lpNamedPipeName, &nTimeOut))
+ return NULL;
+
+ Py_BEGIN_ALLOW_THREADS
+ success = WaitNamedPipe(lpNamedPipeName, nTimeOut);
+ Py_END_ALLOW_THREADS
+
+ if (!success)
+ return PyErr_SetFromWindowsErr(0);
+
+ Py_RETURN_NONE;
+}
+
+static PyMethodDef win32_methods[] = {
+ WIN32_FUNCTION(CloseHandle),
+ WIN32_FUNCTION(GetLastError),
+ WIN32_FUNCTION(OpenProcess),
+ WIN32_FUNCTION(ExitProcess),
+ WIN32_FUNCTION(ConnectNamedPipe),
+ WIN32_FUNCTION(CreateFile),
+ WIN32_FUNCTION(CreateNamedPipe),
+ WIN32_FUNCTION(SetNamedPipeHandleState),
+ WIN32_FUNCTION(WaitNamedPipe),
+ {NULL}
+};
+
+
+PyTypeObject Win32Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+};
+
+
+PyObject *
+create_win32_namespace(void)
+{
+ Win32Type.tp_name = "_multiprocessing.win32";
+ Win32Type.tp_methods = win32_methods;
+ if (PyType_Ready(&Win32Type) < 0)
+ return NULL;
+ Py_INCREF(&Win32Type);
+
+ WIN32_CONSTANT(F_DWORD, ERROR_ALREADY_EXISTS);
+ WIN32_CONSTANT(F_DWORD, ERROR_PIPE_BUSY);
+ WIN32_CONSTANT(F_DWORD, ERROR_PIPE_CONNECTED);
+ WIN32_CONSTANT(F_DWORD, ERROR_SEM_TIMEOUT);
+ WIN32_CONSTANT(F_DWORD, GENERIC_READ);
+ WIN32_CONSTANT(F_DWORD, GENERIC_WRITE);
+ WIN32_CONSTANT(F_DWORD, INFINITE);
+ WIN32_CONSTANT(F_DWORD, NMPWAIT_WAIT_FOREVER);
+ WIN32_CONSTANT(F_DWORD, OPEN_EXISTING);
+ WIN32_CONSTANT(F_DWORD, PIPE_ACCESS_DUPLEX);
+ WIN32_CONSTANT(F_DWORD, PIPE_ACCESS_INBOUND);
+ WIN32_CONSTANT(F_DWORD, PIPE_READMODE_MESSAGE);
+ WIN32_CONSTANT(F_DWORD, PIPE_TYPE_MESSAGE);
+ WIN32_CONSTANT(F_DWORD, PIPE_UNLIMITED_INSTANCES);
+ WIN32_CONSTANT(F_DWORD, PIPE_WAIT);
+ WIN32_CONSTANT(F_DWORD, PROCESS_ALL_ACCESS);
+
+ WIN32_CONSTANT("i", NULL);
+
+ return (PyObject*)&Win32Type;
+}