mirror of
https://github.com/python/cpython.git
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432 lines
11 KiB
C
432 lines
11 KiB
C
/*
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* Win32 functions used by multiprocessing package
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*
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* win32_functions.c
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*
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* Copyright (c) 2006-2008, R Oudkerk --- see COPYING.txt
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*/
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#include "multiprocessing.h"
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#define WIN32_FUNCTION(func) \
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{#func, (PyCFunction)win32_ ## func, METH_VARARGS | METH_STATIC, ""}
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#define WIN32_CONSTANT(fmt, con) \
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PyDict_SetItemString(Win32Type.tp_dict, #con, Py_BuildValue(fmt, con))
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static PyObject *
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win32_CloseHandle(PyObject *self, PyObject *args)
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{
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HANDLE hObject;
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BOOL success;
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if (!PyArg_ParseTuple(args, F_HANDLE, &hObject))
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return NULL;
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Py_BEGIN_ALLOW_THREADS
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success = CloseHandle(hObject);
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Py_END_ALLOW_THREADS
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if (!success)
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return PyErr_SetFromWindowsErr(0);
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Py_RETURN_NONE;
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}
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static PyObject *
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win32_ConnectNamedPipe(PyObject *self, PyObject *args)
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{
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HANDLE hNamedPipe;
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LPOVERLAPPED lpOverlapped;
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BOOL success;
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if (!PyArg_ParseTuple(args, F_HANDLE F_POINTER,
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&hNamedPipe, &lpOverlapped))
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return NULL;
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Py_BEGIN_ALLOW_THREADS
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success = ConnectNamedPipe(hNamedPipe, lpOverlapped);
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Py_END_ALLOW_THREADS
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if (!success)
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return PyErr_SetFromWindowsErr(0);
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Py_RETURN_NONE;
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}
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static PyObject *
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win32_CreateFile(PyObject *self, PyObject *args)
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{
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LPCTSTR lpFileName;
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DWORD dwDesiredAccess;
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DWORD dwShareMode;
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LPSECURITY_ATTRIBUTES lpSecurityAttributes;
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DWORD dwCreationDisposition;
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DWORD dwFlagsAndAttributes;
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HANDLE hTemplateFile;
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HANDLE handle;
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if (!PyArg_ParseTuple(args, "s" F_DWORD F_DWORD F_POINTER
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F_DWORD F_DWORD F_HANDLE,
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&lpFileName, &dwDesiredAccess, &dwShareMode,
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&lpSecurityAttributes, &dwCreationDisposition,
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&dwFlagsAndAttributes, &hTemplateFile))
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return NULL;
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Py_BEGIN_ALLOW_THREADS
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handle = CreateFile(lpFileName, dwDesiredAccess,
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dwShareMode, lpSecurityAttributes,
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dwCreationDisposition,
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dwFlagsAndAttributes, hTemplateFile);
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Py_END_ALLOW_THREADS
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if (handle == INVALID_HANDLE_VALUE)
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return PyErr_SetFromWindowsErr(0);
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return Py_BuildValue(F_HANDLE, handle);
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}
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static PyObject *
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win32_CreateNamedPipe(PyObject *self, PyObject *args)
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{
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LPCTSTR lpName;
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DWORD dwOpenMode;
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DWORD dwPipeMode;
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DWORD nMaxInstances;
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DWORD nOutBufferSize;
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DWORD nInBufferSize;
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DWORD nDefaultTimeOut;
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LPSECURITY_ATTRIBUTES lpSecurityAttributes;
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HANDLE handle;
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if (!PyArg_ParseTuple(args, "s" F_DWORD F_DWORD F_DWORD
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F_DWORD F_DWORD F_DWORD F_POINTER,
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&lpName, &dwOpenMode, &dwPipeMode,
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&nMaxInstances, &nOutBufferSize,
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&nInBufferSize, &nDefaultTimeOut,
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&lpSecurityAttributes))
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return NULL;
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Py_BEGIN_ALLOW_THREADS
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handle = CreateNamedPipe(lpName, dwOpenMode, dwPipeMode,
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nMaxInstances, nOutBufferSize,
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nInBufferSize, nDefaultTimeOut,
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lpSecurityAttributes);
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Py_END_ALLOW_THREADS
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if (handle == INVALID_HANDLE_VALUE)
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return PyErr_SetFromWindowsErr(0);
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return Py_BuildValue(F_HANDLE, handle);
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}
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static PyObject *
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win32_ExitProcess(PyObject *self, PyObject *args)
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{
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UINT uExitCode;
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if (!PyArg_ParseTuple(args, "I", &uExitCode))
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return NULL;
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#if defined(Py_DEBUG)
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SetErrorMode(SEM_FAILCRITICALERRORS|SEM_NOALIGNMENTFAULTEXCEPT|SEM_NOGPFAULTERRORBOX|SEM_NOOPENFILEERRORBOX);
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_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG);
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#endif
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ExitProcess(uExitCode);
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return NULL;
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}
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static PyObject *
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win32_GetLastError(PyObject *self, PyObject *args)
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{
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return Py_BuildValue(F_DWORD, GetLastError());
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}
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static PyObject *
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win32_OpenProcess(PyObject *self, PyObject *args)
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{
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DWORD dwDesiredAccess;
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BOOL bInheritHandle;
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DWORD dwProcessId;
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HANDLE handle;
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if (!PyArg_ParseTuple(args, F_DWORD "i" F_DWORD,
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&dwDesiredAccess, &bInheritHandle, &dwProcessId))
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return NULL;
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handle = OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId);
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if (handle == NULL)
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return PyErr_SetFromWindowsErr(0);
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return Py_BuildValue(F_HANDLE, handle);
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}
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static PyObject *
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win32_SetNamedPipeHandleState(PyObject *self, PyObject *args)
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{
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HANDLE hNamedPipe;
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PyObject *oArgs[3];
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DWORD dwArgs[3], *pArgs[3] = {NULL, NULL, NULL};
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int i;
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if (!PyArg_ParseTuple(args, F_HANDLE "OOO",
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&hNamedPipe, &oArgs[0], &oArgs[1], &oArgs[2]))
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return NULL;
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PyErr_Clear();
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for (i = 0 ; i < 3 ; i++) {
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if (oArgs[i] != Py_None) {
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dwArgs[i] = PyLong_AsUnsignedLongMask(oArgs[i]);
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if (PyErr_Occurred())
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return NULL;
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pArgs[i] = &dwArgs[i];
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}
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}
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if (!SetNamedPipeHandleState(hNamedPipe, pArgs[0], pArgs[1], pArgs[2]))
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return PyErr_SetFromWindowsErr(0);
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Py_RETURN_NONE;
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}
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static PyObject *
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win32_WaitNamedPipe(PyObject *self, PyObject *args)
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{
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LPCTSTR lpNamedPipeName;
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DWORD nTimeOut;
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BOOL success;
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if (!PyArg_ParseTuple(args, "s" F_DWORD, &lpNamedPipeName, &nTimeOut))
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return NULL;
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Py_BEGIN_ALLOW_THREADS
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success = WaitNamedPipe(lpNamedPipeName, nTimeOut);
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Py_END_ALLOW_THREADS
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if (!success)
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return PyErr_SetFromWindowsErr(0);
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Py_RETURN_NONE;
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}
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static PyObject *
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win32_closesocket(PyObject *self, PyObject *args)
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{
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HANDLE handle;
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int ret;
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if (!PyArg_ParseTuple(args, F_HANDLE ":closesocket" , &handle))
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return NULL;
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Py_BEGIN_ALLOW_THREADS
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ret = closesocket((SOCKET) handle);
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Py_END_ALLOW_THREADS
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if (ret)
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return PyErr_SetExcFromWindowsErr(PyExc_IOError, WSAGetLastError());
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Py_RETURN_NONE;
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}
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static PyObject *
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win32_recv(PyObject *self, PyObject *args)
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{
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HANDLE handle;
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int size, nread;
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PyObject *buf;
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if (!PyArg_ParseTuple(args, F_HANDLE "i:recv" , &handle, &size))
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return NULL;
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buf = PyBytes_FromStringAndSize(NULL, size);
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if (!buf)
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return NULL;
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Py_BEGIN_ALLOW_THREADS
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nread = recv((SOCKET) handle, PyBytes_AS_STRING(buf), size, 0);
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Py_END_ALLOW_THREADS
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if (nread < 0) {
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Py_DECREF(buf);
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return PyErr_SetExcFromWindowsErr(PyExc_IOError, WSAGetLastError());
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}
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_PyBytes_Resize(&buf, nread);
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return buf;
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}
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static PyObject *
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win32_send(PyObject *self, PyObject *args)
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{
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HANDLE handle;
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Py_buffer buf;
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int ret;
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if (!PyArg_ParseTuple(args, F_HANDLE "y*:send" , &handle, &buf))
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return NULL;
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Py_BEGIN_ALLOW_THREADS
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ret = send((SOCKET) handle, buf.buf, buf.len, 0);
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Py_END_ALLOW_THREADS
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PyBuffer_Release(&buf);
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if (ret < 0)
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return PyErr_SetExcFromWindowsErr(PyExc_IOError, WSAGetLastError());
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return PyLong_FromLong(ret);
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}
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static PyObject *
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win32_WriteFile(PyObject *self, PyObject *args)
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{
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HANDLE handle;
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Py_buffer buf;
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int written;
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BOOL ret;
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if (!PyArg_ParseTuple(args, F_HANDLE "y*:WriteFile" , &handle, &buf))
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return NULL;
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Py_BEGIN_ALLOW_THREADS
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ret = WriteFile(handle, buf.buf, buf.len, &written, NULL);
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Py_END_ALLOW_THREADS
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PyBuffer_Release(&buf);
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if (!ret)
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return PyErr_SetExcFromWindowsErr(PyExc_IOError, 0);
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return PyLong_FromLong(written);
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}
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static PyObject *
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win32_ReadFile(PyObject *self, PyObject *args)
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{
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HANDLE handle;
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int size;
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DWORD nread;
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PyObject *buf;
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BOOL ret;
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if (!PyArg_ParseTuple(args, F_HANDLE "i:ReadFile" , &handle, &size))
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return NULL;
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buf = PyBytes_FromStringAndSize(NULL, size);
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if (!buf)
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return NULL;
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Py_BEGIN_ALLOW_THREADS
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ret = ReadFile(handle, PyBytes_AS_STRING(buf), size, &nread, NULL);
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Py_END_ALLOW_THREADS
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if (!ret && GetLastError() != ERROR_MORE_DATA) {
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Py_DECREF(buf);
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return PyErr_SetExcFromWindowsErr(PyExc_IOError, 0);
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}
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if (_PyBytes_Resize(&buf, nread))
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return NULL;
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return Py_BuildValue("NN", buf, PyBool_FromLong(ret));
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}
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static PyObject *
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win32_PeekNamedPipe(PyObject *self, PyObject *args)
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{
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HANDLE handle;
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int size = 0;
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PyObject *buf = NULL;
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DWORD nread, navail, nleft;
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BOOL ret;
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if (!PyArg_ParseTuple(args, F_HANDLE "|i:PeekNamedPipe" , &handle, &size))
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return NULL;
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if (size < 0) {
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PyErr_SetString(PyExc_ValueError, "negative size");
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return NULL;
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}
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if (size) {
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buf = PyBytes_FromStringAndSize(NULL, size);
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if (!buf)
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return NULL;
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Py_BEGIN_ALLOW_THREADS
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ret = PeekNamedPipe(handle, PyBytes_AS_STRING(buf), size, &nread,
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&navail, &nleft);
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Py_END_ALLOW_THREADS
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if (!ret) {
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Py_DECREF(buf);
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return PyErr_SetExcFromWindowsErr(PyExc_IOError, 0);
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}
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if (_PyBytes_Resize(&buf, nread))
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return NULL;
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return Py_BuildValue("Nii", buf, navail, nleft);
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}
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else {
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Py_BEGIN_ALLOW_THREADS
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ret = PeekNamedPipe(handle, NULL, 0, NULL, &navail, &nleft);
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Py_END_ALLOW_THREADS
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if (!ret) {
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return PyErr_SetExcFromWindowsErr(PyExc_IOError, 0);
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}
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return Py_BuildValue("ii", navail, nleft);
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}
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}
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static PyMethodDef win32_methods[] = {
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WIN32_FUNCTION(CloseHandle),
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WIN32_FUNCTION(GetLastError),
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WIN32_FUNCTION(OpenProcess),
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WIN32_FUNCTION(ExitProcess),
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WIN32_FUNCTION(ConnectNamedPipe),
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WIN32_FUNCTION(CreateFile),
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WIN32_FUNCTION(CreateNamedPipe),
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WIN32_FUNCTION(ReadFile),
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WIN32_FUNCTION(PeekNamedPipe),
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WIN32_FUNCTION(SetNamedPipeHandleState),
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WIN32_FUNCTION(WaitNamedPipe),
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WIN32_FUNCTION(WriteFile),
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WIN32_FUNCTION(closesocket),
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WIN32_FUNCTION(recv),
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WIN32_FUNCTION(send),
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{NULL}
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};
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PyTypeObject Win32Type = {
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PyVarObject_HEAD_INIT(NULL, 0)
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};
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PyObject *
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create_win32_namespace(void)
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{
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Win32Type.tp_name = "_multiprocessing.win32";
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Win32Type.tp_methods = win32_methods;
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if (PyType_Ready(&Win32Type) < 0)
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return NULL;
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Py_INCREF(&Win32Type);
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WIN32_CONSTANT(F_DWORD, ERROR_ALREADY_EXISTS);
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WIN32_CONSTANT(F_DWORD, ERROR_BROKEN_PIPE);
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WIN32_CONSTANT(F_DWORD, ERROR_NO_SYSTEM_RESOURCES);
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WIN32_CONSTANT(F_DWORD, ERROR_PIPE_BUSY);
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WIN32_CONSTANT(F_DWORD, ERROR_PIPE_CONNECTED);
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WIN32_CONSTANT(F_DWORD, ERROR_SEM_TIMEOUT);
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WIN32_CONSTANT(F_DWORD, GENERIC_READ);
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WIN32_CONSTANT(F_DWORD, GENERIC_WRITE);
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WIN32_CONSTANT(F_DWORD, INFINITE);
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WIN32_CONSTANT(F_DWORD, NMPWAIT_WAIT_FOREVER);
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WIN32_CONSTANT(F_DWORD, OPEN_EXISTING);
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WIN32_CONSTANT(F_DWORD, PIPE_ACCESS_DUPLEX);
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WIN32_CONSTANT(F_DWORD, PIPE_ACCESS_INBOUND);
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WIN32_CONSTANT(F_DWORD, PIPE_READMODE_MESSAGE);
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WIN32_CONSTANT(F_DWORD, PIPE_TYPE_MESSAGE);
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WIN32_CONSTANT(F_DWORD, PIPE_UNLIMITED_INSTANCES);
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WIN32_CONSTANT(F_DWORD, PIPE_WAIT);
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WIN32_CONSTANT(F_DWORD, PROCESS_ALL_ACCESS);
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WIN32_CONSTANT("i", NULL);
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return (PyObject*)&Win32Type;
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}
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