diff -r ffa851df0825 -r 2fb8b9db1c86 symbian-qemu-0.9.1-12/python-2.6.1/Modules/_multiprocessing/multiprocessing.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/symbian-qemu-0.9.1-12/python-2.6.1/Modules/_multiprocessing/multiprocessing.c Fri Jul 31 15:01:17 2009 +0100 @@ -0,0 +1,311 @@ +/* + * Extension module used by multiprocessing 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 + */ + +PyMODINIT_FUNC +init_multiprocessing(void) +{ + PyObject *module, *temp, *value; + + /* Initialize module */ + module = Py_InitModule("_multiprocessing", module_methods); + if (!module) + return; + + /* Get copy of objects from pickle */ + temp = PyImport_ImportModule(PICKLE_MODULE); + if (!temp) + return; + 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; + BufferTooShort = PyObject_GetAttrString(temp, "BufferTooShort"); + Py_XDECREF(temp); + + /* Add connection type to module */ + if (PyType_Ready(&ConnectionType) < 0) + return; + 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; + 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; + Py_INCREF(&PipeConnectionType); + PyModule_AddObject(module, "PipeConnection", + (PyObject*)&PipeConnectionType); + + /* Initialize win32 class and add to multiprocessing */ + temp = create_win32_namespace(); + if (!temp) + return; + 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; + } + if (!SetConsoleCtrlHandler(ProcessingCtrlHandler, TRUE)) { + PyErr_SetFromWindowsErr(0); + return; + } +#endif + + /* Add configuration macros */ + temp = PyDict_New(); + if (!temp) + return; +#define ADD_FLAG(name) \ + value = Py_BuildValue("i", name); \ + if (value == NULL) { Py_DECREF(temp); return; } \ + if (PyDict_SetItemString(temp, #name, value) < 0) { \ + Py_DECREF(temp); Py_DECREF(value); return; } \ + Py_DECREF(value) + +#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 + if (PyModule_AddObject(module, "flags", temp) < 0) + return; +}