cpython/Modules/_multiprocessing/win32_functions.c

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/*
* 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;
#if defined(Py_DEBUG)
SetErrorMode(SEM_FAILCRITICALERRORS|SEM_NOALIGNMENTFAULTEXCEPT|SEM_NOGPFAULTERRORBOX|SEM_NOOPENFILEERRORBOX);
_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG);
#endif
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] = PyLong_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 PyObject *
win32_closesocket(PyObject *self, PyObject *args)
{
HANDLE handle;
int ret;
if (!PyArg_ParseTuple(args, F_HANDLE ":closesocket" , &handle))
return NULL;
Py_BEGIN_ALLOW_THREADS
ret = closesocket((SOCKET) handle);
Py_END_ALLOW_THREADS
if (ret)
return PyErr_SetExcFromWindowsErr(PyExc_IOError, WSAGetLastError());
Py_RETURN_NONE;
}
static PyObject *
win32_recv(PyObject *self, PyObject *args)
{
HANDLE handle;
int size, nread;
PyObject *buf;
if (!PyArg_ParseTuple(args, F_HANDLE "i:recv" , &handle, &size))
return NULL;
buf = PyBytes_FromStringAndSize(NULL, size);
if (!buf)
return NULL;
Py_BEGIN_ALLOW_THREADS
nread = recv((SOCKET) handle, PyBytes_AS_STRING(buf), size, 0);
Py_END_ALLOW_THREADS
if (nread < 0) {
Py_DECREF(buf);
return PyErr_SetExcFromWindowsErr(PyExc_IOError, WSAGetLastError());
}
_PyBytes_Resize(&buf, nread);
return buf;
}
static PyObject *
win32_send(PyObject *self, PyObject *args)
{
HANDLE handle;
Py_buffer buf;
int ret;
if (!PyArg_ParseTuple(args, F_HANDLE "y*:send" , &handle, &buf))
return NULL;
Py_BEGIN_ALLOW_THREADS
ret = send((SOCKET) handle, buf.buf, buf.len, 0);
Py_END_ALLOW_THREADS
PyBuffer_Release(&buf);
if (ret < 0)
return PyErr_SetExcFromWindowsErr(PyExc_IOError, WSAGetLastError());
return PyLong_FromLong(ret);
}
static PyObject *
win32_WriteFile(PyObject *self, PyObject *args)
{
HANDLE handle;
Py_buffer buf;
int written;
BOOL ret;
if (!PyArg_ParseTuple(args, F_HANDLE "y*:WriteFile" , &handle, &buf))
return NULL;
Py_BEGIN_ALLOW_THREADS
ret = WriteFile(handle, buf.buf, buf.len, &written, NULL);
Py_END_ALLOW_THREADS
PyBuffer_Release(&buf);
if (!ret)
return PyErr_SetExcFromWindowsErr(PyExc_IOError, 0);
return PyLong_FromLong(written);
}
static PyObject *
win32_ReadFile(PyObject *self, PyObject *args)
{
HANDLE handle;
int size;
DWORD nread;
PyObject *buf;
BOOL ret;
if (!PyArg_ParseTuple(args, F_HANDLE "i:ReadFile" , &handle, &size))
return NULL;
buf = PyBytes_FromStringAndSize(NULL, size);
if (!buf)
return NULL;
Py_BEGIN_ALLOW_THREADS
ret = ReadFile(handle, PyBytes_AS_STRING(buf), size, &nread, NULL);
Py_END_ALLOW_THREADS
if (!ret && GetLastError() != ERROR_MORE_DATA) {
Py_DECREF(buf);
return PyErr_SetExcFromWindowsErr(PyExc_IOError, 0);
}
if (_PyBytes_Resize(&buf, nread))
return NULL;
return Py_BuildValue("NN", buf, PyBool_FromLong(ret));
}
static PyObject *
win32_PeekNamedPipe(PyObject *self, PyObject *args)
{
HANDLE handle;
int size = 0;
PyObject *buf = NULL;
DWORD nread, navail, nleft;
BOOL ret;
if (!PyArg_ParseTuple(args, F_HANDLE "|i:PeekNamedPipe" , &handle, &size))
return NULL;
if (size < 0) {
PyErr_SetString(PyExc_ValueError, "negative size");
return NULL;
}
if (size) {
buf = PyBytes_FromStringAndSize(NULL, size);
if (!buf)
return NULL;
Py_BEGIN_ALLOW_THREADS
ret = PeekNamedPipe(handle, PyBytes_AS_STRING(buf), size, &nread,
&navail, &nleft);
Py_END_ALLOW_THREADS
if (!ret) {
Py_DECREF(buf);
return PyErr_SetExcFromWindowsErr(PyExc_IOError, 0);
}
if (_PyBytes_Resize(&buf, nread))
return NULL;
return Py_BuildValue("Nii", buf, navail, nleft);
}
else {
Py_BEGIN_ALLOW_THREADS
ret = PeekNamedPipe(handle, NULL, 0, NULL, &navail, &nleft);
Py_END_ALLOW_THREADS
if (!ret) {
return PyErr_SetExcFromWindowsErr(PyExc_IOError, 0);
}
return Py_BuildValue("ii", navail, nleft);
}
}
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(ReadFile),
WIN32_FUNCTION(PeekNamedPipe),
WIN32_FUNCTION(SetNamedPipeHandleState),
WIN32_FUNCTION(WaitNamedPipe),
WIN32_FUNCTION(WriteFile),
WIN32_FUNCTION(closesocket),
WIN32_FUNCTION(recv),
WIN32_FUNCTION(send),
{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_BROKEN_PIPE);
WIN32_CONSTANT(F_DWORD, ERROR_NO_SYSTEM_RESOURCES);
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;
}