mirror of
https://github.com/python/cpython.git
synced 2024-11-24 08:52:25 +01:00
c2627d6eea
This PR adds the ability to enable the GIL if it was disabled at interpreter startup, and modifies the multi-phase module initialization path to enable the GIL when loading a module, unless that module's spec includes a slot indicating it can run safely without the GIL. PEP 703 called the constant for the slot `Py_mod_gil_not_used`; I went with `Py_MOD_GIL_NOT_USED` for consistency with gh-104148. A warning will be issued up to once per interpreter for the first GIL-using module that is loaded. If `-v` is given, a shorter message will be printed to stderr every time a GIL-using module is loaded (including the first one that issues a warning).
675 lines
17 KiB
C
675 lines
17 KiB
C
/*********************************************************
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msvcrtmodule.c
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A Python interface to the Microsoft Visual C Runtime
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Library, providing access to those non-portable, but
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still useful routines.
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Only ever compiled with an MS compiler, so no attempt
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has been made to avoid MS language extensions, etc...
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This may only work on NT or 95...
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Author: Mark Hammond and Guido van Rossum.
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Maintenance: Guido van Rossum.
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***********************************************************/
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#include "Python.h"
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#include "pycore_fileutils.h" // _Py_BEGIN_SUPPRESS_IPH
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#include "malloc.h"
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#include <io.h>
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#include <conio.h>
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#include <sys/locking.h>
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#include <crtdbg.h>
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#include <windows.h>
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#ifdef _MSC_VER
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#if _MSC_VER >= 1500 && _MSC_VER < 1600
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#include <crtassem.h>
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#elif _MSC_VER >= 1600
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#include <crtversion.h>
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#endif
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#endif
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/*[python input]
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class HANDLE_converter(CConverter):
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type = 'void *'
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format_unit = '"_Py_PARSE_UINTPTR"'
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def parse_arg(self, argname, displayname, *, limited_capi):
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return self.format_code("""
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{paramname} = PyLong_AsVoidPtr({argname});
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if (!{paramname} && PyErr_Occurred()) {{{{
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goto exit;
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}}}}
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""",
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argname=argname)
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class HANDLE_return_converter(CReturnConverter):
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type = 'void *'
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def render(self, function, data):
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self.declare(data)
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self.err_occurred_if(
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"_return_value == NULL || _return_value == INVALID_HANDLE_VALUE",
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data)
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data.return_conversion.append(
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'return_value = PyLong_FromVoidPtr(_return_value);\n')
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class byte_char_return_converter(CReturnConverter):
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type = 'int'
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def render(self, function, data):
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data.declarations.append('char s[1];')
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data.return_value = 's[0]'
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data.return_conversion.append(
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'return_value = PyBytes_FromStringAndSize(s, 1);\n')
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class wchar_t_return_converter(CReturnConverter):
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type = 'wchar_t'
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def render(self, function, data):
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self.declare(data)
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data.return_conversion.append(
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'return_value = PyUnicode_FromOrdinal(_return_value);\n')
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[python start generated code]*/
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/*[python end generated code: output=da39a3ee5e6b4b0d input=ff031be44ab3250d]*/
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/*[clinic input]
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module msvcrt
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=f31a87a783d036cd]*/
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#include "clinic/msvcrtmodule.c.h"
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/*[clinic input]
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msvcrt.heapmin
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Minimize the malloc() heap.
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Force the malloc() heap to clean itself up and return unused blocks
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to the operating system. On failure, this raises OSError.
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[clinic start generated code]*/
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static PyObject *
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msvcrt_heapmin_impl(PyObject *module)
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/*[clinic end generated code: output=1ba00f344782dc19 input=82e1771d21bde2d8]*/
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{
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if (_heapmin() != 0)
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return PyErr_SetFromErrno(PyExc_OSError);
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Py_RETURN_NONE;
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}
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/*[clinic input]
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msvcrt.locking
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fd: int
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mode: int
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nbytes: long
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/
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Lock part of a file based on file descriptor fd from the C runtime.
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Raises OSError on failure. The locked region of the file extends from
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the current file position for nbytes bytes, and may continue beyond
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the end of the file. mode must be one of the LK_* constants listed
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below. Multiple regions in a file may be locked at the same time, but
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may not overlap. Adjacent regions are not merged; they must be unlocked
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individually.
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[clinic start generated code]*/
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static PyObject *
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msvcrt_locking_impl(PyObject *module, int fd, int mode, long nbytes)
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/*[clinic end generated code: output=a4a90deca9785a03 input=e97bd15fc4a04fef]*/
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{
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int err;
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if (PySys_Audit("msvcrt.locking", "iil", fd, mode, nbytes) < 0) {
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return NULL;
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}
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Py_BEGIN_ALLOW_THREADS
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_Py_BEGIN_SUPPRESS_IPH
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err = _locking(fd, mode, nbytes);
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_Py_END_SUPPRESS_IPH
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Py_END_ALLOW_THREADS
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if (err != 0)
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return PyErr_SetFromErrno(PyExc_OSError);
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Py_RETURN_NONE;
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}
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/*[clinic input]
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msvcrt.setmode -> long
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fd: int
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mode as flags: int
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/
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Set the line-end translation mode for the file descriptor fd.
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To set it to text mode, flags should be os.O_TEXT; for binary, it
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should be os.O_BINARY.
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Return value is the previous mode.
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[clinic start generated code]*/
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static long
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msvcrt_setmode_impl(PyObject *module, int fd, int flags)
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/*[clinic end generated code: output=24a9be5ea07ccb9b input=76e7c01f6b137f75]*/
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{
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_Py_BEGIN_SUPPRESS_IPH
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flags = _setmode(fd, flags);
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_Py_END_SUPPRESS_IPH
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if (flags == -1)
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PyErr_SetFromErrno(PyExc_OSError);
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return flags;
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}
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/*[clinic input]
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msvcrt.open_osfhandle -> long
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handle: HANDLE
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flags: int
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/
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Create a C runtime file descriptor from the file handle handle.
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The flags parameter should be a bitwise OR of os.O_APPEND, os.O_RDONLY,
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and os.O_TEXT. The returned file descriptor may be used as a parameter
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to os.fdopen() to create a file object.
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[clinic start generated code]*/
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static long
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msvcrt_open_osfhandle_impl(PyObject *module, void *handle, int flags)
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/*[clinic end generated code: output=b2fb97c4b515e4e6 input=d5db190a307cf4bb]*/
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{
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if (PySys_Audit("msvcrt.open_osfhandle", "Ki", handle, flags) < 0) {
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return -1;
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}
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return _Py_open_osfhandle(handle, flags);
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}
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/*[clinic input]
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msvcrt.get_osfhandle -> HANDLE
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fd: int
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/
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Return the file handle for the file descriptor fd.
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Raises OSError if fd is not recognized.
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[clinic start generated code]*/
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static void *
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msvcrt_get_osfhandle_impl(PyObject *module, int fd)
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/*[clinic end generated code: output=aca01dfe24637374 input=5fcfde9b17136aa2]*/
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{
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if (PySys_Audit("msvcrt.get_osfhandle", "(i)", fd) < 0) {
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return NULL;
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}
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return _Py_get_osfhandle(fd);
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}
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/* Console I/O */
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/*[clinic input]
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msvcrt.kbhit -> long
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Returns a nonzero value if a keypress is waiting to be read. Otherwise, return 0.
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[clinic start generated code]*/
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static long
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msvcrt_kbhit_impl(PyObject *module)
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/*[clinic end generated code: output=940dfce6587c1890 input=d0f4cb3289ff51e2]*/
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{
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return _kbhit();
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}
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/*[clinic input]
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msvcrt.getch -> byte_char
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Read a keypress and return the resulting character as a byte string.
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Nothing is echoed to the console. This call will block if a keypress is
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not already available, but will not wait for Enter to be pressed. If the
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pressed key was a special function key, this will return '\000' or
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'\xe0'; the next call will return the keycode. The Control-C keypress
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cannot be read with this function.
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[clinic start generated code]*/
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static int
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msvcrt_getch_impl(PyObject *module)
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/*[clinic end generated code: output=a4e51f0565064a7d input=37a40cf0ed0d1153]*/
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{
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int ch;
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Py_BEGIN_ALLOW_THREADS
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ch = _getch();
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Py_END_ALLOW_THREADS
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return ch;
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}
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#ifdef MS_WINDOWS_DESKTOP
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/*[clinic input]
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msvcrt.getwch -> wchar_t
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Wide char variant of getch(), returning a Unicode value.
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[clinic start generated code]*/
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static wchar_t
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msvcrt_getwch_impl(PyObject *module)
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/*[clinic end generated code: output=be9937494e22f007 input=27b3dec8ad823d7c]*/
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{
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wchar_t ch;
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Py_BEGIN_ALLOW_THREADS
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ch = _getwch();
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Py_END_ALLOW_THREADS
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return ch;
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}
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#endif /* MS_WINDOWS_DESKTOP */
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/*[clinic input]
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msvcrt.getche -> byte_char
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Similar to getch(), but the keypress will be echoed if possible.
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[clinic start generated code]*/
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static int
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msvcrt_getche_impl(PyObject *module)
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/*[clinic end generated code: output=d8f7db4fd2990401 input=43311ade9ed4a9c0]*/
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{
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int ch;
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Py_BEGIN_ALLOW_THREADS
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ch = _getche();
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Py_END_ALLOW_THREADS
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return ch;
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}
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#ifdef MS_WINDOWS_DESKTOP
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/*[clinic input]
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msvcrt.getwche -> wchar_t
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Wide char variant of getche(), returning a Unicode value.
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[clinic start generated code]*/
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static wchar_t
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msvcrt_getwche_impl(PyObject *module)
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/*[clinic end generated code: output=d0dae5ba3829d596 input=49337d59d1a591f8]*/
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{
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wchar_t ch;
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Py_BEGIN_ALLOW_THREADS
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ch = _getwche();
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Py_END_ALLOW_THREADS
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return ch;
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}
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#endif /* MS_WINDOWS_DESKTOP */
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/*[clinic input]
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msvcrt.putch
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char: char
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/
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Print the byte string char to the console without buffering.
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[clinic start generated code]*/
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static PyObject *
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msvcrt_putch_impl(PyObject *module, char char_value)
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/*[clinic end generated code: output=92ec9b81012d8f60 input=ec078dd10cb054d6]*/
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{
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_Py_BEGIN_SUPPRESS_IPH
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_putch(char_value);
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_Py_END_SUPPRESS_IPH
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Py_RETURN_NONE;
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}
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#ifdef MS_WINDOWS_DESKTOP
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/*[clinic input]
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msvcrt.putwch
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unicode_char: int(accept={str})
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/
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Wide char variant of putch(), accepting a Unicode value.
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[clinic start generated code]*/
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static PyObject *
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msvcrt_putwch_impl(PyObject *module, int unicode_char)
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/*[clinic end generated code: output=a3bd1a8951d28eee input=996ccd0bbcbac4c3]*/
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{
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_Py_BEGIN_SUPPRESS_IPH
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_putwch(unicode_char);
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_Py_END_SUPPRESS_IPH
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Py_RETURN_NONE;
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}
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#endif /* MS_WINDOWS_DESKTOP */
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/*[clinic input]
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msvcrt.ungetch
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char: char
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/
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Opposite of getch.
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Cause the byte string char to be "pushed back" into the
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console buffer; it will be the next character read by
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getch() or getche().
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[clinic start generated code]*/
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static PyObject *
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msvcrt_ungetch_impl(PyObject *module, char char_value)
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/*[clinic end generated code: output=c6942a0efa119000 input=22f07ee9001bbf0f]*/
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{
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int res;
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_Py_BEGIN_SUPPRESS_IPH
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res = _ungetch(char_value);
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_Py_END_SUPPRESS_IPH
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if (res == EOF)
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return PyErr_SetFromErrno(PyExc_OSError);
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Py_RETURN_NONE;
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}
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#ifdef MS_WINDOWS_DESKTOP
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/*[clinic input]
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msvcrt.ungetwch
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unicode_char: int(accept={str})
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/
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Wide char variant of ungetch(), accepting a Unicode value.
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[clinic start generated code]*/
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static PyObject *
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msvcrt_ungetwch_impl(PyObject *module, int unicode_char)
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/*[clinic end generated code: output=e63af05438b8ba3d input=83ec0492be04d564]*/
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{
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int res;
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_Py_BEGIN_SUPPRESS_IPH
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res = _ungetwch(unicode_char);
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_Py_END_SUPPRESS_IPH
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if (res == WEOF)
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return PyErr_SetFromErrno(PyExc_OSError);
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Py_RETURN_NONE;
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}
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#endif /* MS_WINDOWS_DESKTOP */
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#ifdef _DEBUG
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/*[clinic input]
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msvcrt.CrtSetReportFile -> HANDLE
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type: int
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file: HANDLE
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/
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Wrapper around _CrtSetReportFile.
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Only available on Debug builds.
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[clinic start generated code]*/
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static void *
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msvcrt_CrtSetReportFile_impl(PyObject *module, int type, void *file)
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/*[clinic end generated code: output=9393e8c77088bbe9 input=290809b5f19e65b9]*/
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{
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HANDLE res;
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_Py_BEGIN_SUPPRESS_IPH
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res = _CrtSetReportFile(type, file);
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_Py_END_SUPPRESS_IPH
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return res;
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}
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/*[clinic input]
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msvcrt.CrtSetReportMode -> long
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type: int
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mode: int
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/
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Wrapper around _CrtSetReportMode.
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Only available on Debug builds.
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[clinic start generated code]*/
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static long
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msvcrt_CrtSetReportMode_impl(PyObject *module, int type, int mode)
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/*[clinic end generated code: output=b2863761523de317 input=9319d29b4319426b]*/
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{
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int res;
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_Py_BEGIN_SUPPRESS_IPH
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res = _CrtSetReportMode(type, mode);
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_Py_END_SUPPRESS_IPH
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if (res == -1)
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PyErr_SetFromErrno(PyExc_OSError);
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return res;
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}
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|
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/*[clinic input]
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msvcrt.set_error_mode -> long
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mode: int
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/
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Wrapper around _set_error_mode.
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Only available on Debug builds.
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[clinic start generated code]*/
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static long
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msvcrt_set_error_mode_impl(PyObject *module, int mode)
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/*[clinic end generated code: output=ac4a09040d8ac4e3 input=046fca59c0f20872]*/
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{
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long res;
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_Py_BEGIN_SUPPRESS_IPH
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res = _set_error_mode(mode);
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_Py_END_SUPPRESS_IPH
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return res;
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}
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#endif /* _DEBUG */
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|
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#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM)
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/*[clinic input]
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msvcrt.GetErrorMode
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Wrapper around GetErrorMode.
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[clinic start generated code]*/
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static PyObject *
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msvcrt_GetErrorMode_impl(PyObject *module)
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/*[clinic end generated code: output=3103fc6145913591 input=5a7fb083b6dd71fd]*/
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{
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unsigned int res;
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_Py_BEGIN_SUPPRESS_IPH
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res = GetErrorMode();
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_Py_END_SUPPRESS_IPH
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return PyLong_FromUnsignedLong(res);
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}
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#endif /* MS_WINDOWS_APP || MS_WINDOWS_SYSTEM */
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/*[clinic input]
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msvcrt.SetErrorMode
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mode: unsigned_int(bitwise=True)
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/
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Wrapper around SetErrorMode.
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[clinic start generated code]*/
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static PyObject *
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msvcrt_SetErrorMode_impl(PyObject *module, unsigned int mode)
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/*[clinic end generated code: output=01d529293f00da8f input=d8b167258d32d907]*/
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{
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unsigned int res;
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_Py_BEGIN_SUPPRESS_IPH
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res = SetErrorMode(mode);
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_Py_END_SUPPRESS_IPH
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return PyLong_FromUnsignedLong(res);
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}
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/*[clinic input]
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=da39a3ee5e6b4b0d]*/
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/* List of functions exported by this module */
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static struct PyMethodDef msvcrt_functions[] = {
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MSVCRT_HEAPMIN_METHODDEF
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MSVCRT_LOCKING_METHODDEF
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MSVCRT_SETMODE_METHODDEF
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MSVCRT_OPEN_OSFHANDLE_METHODDEF
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MSVCRT_GET_OSFHANDLE_METHODDEF
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MSVCRT_KBHIT_METHODDEF
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MSVCRT_GETCH_METHODDEF
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MSVCRT_GETCHE_METHODDEF
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MSVCRT_PUTCH_METHODDEF
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MSVCRT_UNGETCH_METHODDEF
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MSVCRT_GETERRORMODE_METHODDEF
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MSVCRT_SETERRORMODE_METHODDEF
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MSVCRT_CRTSETREPORTFILE_METHODDEF
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MSVCRT_CRTSETREPORTMODE_METHODDEF
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MSVCRT_SET_ERROR_MODE_METHODDEF
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MSVCRT_GETWCH_METHODDEF
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MSVCRT_GETWCHE_METHODDEF
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MSVCRT_PUTWCH_METHODDEF
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MSVCRT_UNGETWCH_METHODDEF
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{NULL, NULL}
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};
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static int
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insertptr(PyObject *mod, const char *name, void *value)
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{
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return PyModule_Add(mod, name, PyLong_FromVoidPtr(value));
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}
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#define INSERTINT(MOD, NAME, VAL) do { \
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if (PyModule_AddIntConstant(MOD, NAME, VAL) < 0) { \
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return -1; \
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} \
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} while (0)
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#define INSERTPTR(MOD, NAME, PTR) do { \
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if (insertptr(MOD, NAME, PTR) < 0) { \
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return -1; \
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} \
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} while (0)
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#define INSERTSTR(MOD, NAME, CONST) do { \
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if (PyModule_AddStringConstant(MOD, NAME, CONST) < 0) { \
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return -1; \
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} \
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} while (0)
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static int
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exec_module(PyObject* m)
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{
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/* constants for the locking() function's mode argument */
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INSERTINT(m, "LK_LOCK", _LK_LOCK);
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INSERTINT(m, "LK_NBLCK", _LK_NBLCK);
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INSERTINT(m, "LK_NBRLCK", _LK_NBRLCK);
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INSERTINT(m, "LK_RLCK", _LK_RLCK);
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INSERTINT(m, "LK_UNLCK", _LK_UNLCK);
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#ifdef MS_WINDOWS_DESKTOP
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INSERTINT(m, "SEM_FAILCRITICALERRORS", SEM_FAILCRITICALERRORS);
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INSERTINT(m, "SEM_NOALIGNMENTFAULTEXCEPT", SEM_NOALIGNMENTFAULTEXCEPT);
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INSERTINT(m, "SEM_NOGPFAULTERRORBOX", SEM_NOGPFAULTERRORBOX);
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INSERTINT(m, "SEM_NOOPENFILEERRORBOX", SEM_NOOPENFILEERRORBOX);
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#endif
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#ifdef _DEBUG
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INSERTINT(m, "CRT_WARN", _CRT_WARN);
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INSERTINT(m, "CRT_ERROR", _CRT_ERROR);
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INSERTINT(m, "CRT_ASSERT", _CRT_ASSERT);
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INSERTINT(m, "CRTDBG_MODE_DEBUG", _CRTDBG_MODE_DEBUG);
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INSERTINT(m, "CRTDBG_MODE_FILE", _CRTDBG_MODE_FILE);
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INSERTINT(m, "CRTDBG_MODE_WNDW", _CRTDBG_MODE_WNDW);
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INSERTINT(m, "CRTDBG_REPORT_MODE", _CRTDBG_REPORT_MODE);
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INSERTPTR(m, "CRTDBG_FILE_STDERR", _CRTDBG_FILE_STDERR);
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INSERTPTR(m, "CRTDBG_FILE_STDOUT", _CRTDBG_FILE_STDOUT);
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|
INSERTPTR(m, "CRTDBG_REPORT_FILE", _CRTDBG_REPORT_FILE);
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INSERTINT(m, "OUT_TO_DEFAULT", _OUT_TO_DEFAULT);
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INSERTINT(m, "OUT_TO_STDERR", _OUT_TO_STDERR);
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INSERTINT(m, "OUT_TO_MSGBOX", _OUT_TO_MSGBOX);
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INSERTINT(m, "REPORT_ERRMODE", _REPORT_ERRMODE);
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#endif
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#undef INSERTINT
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#undef INSERTPTR
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|
|
|
/* constants for the crt versions */
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#ifdef _VC_ASSEMBLY_PUBLICKEYTOKEN
|
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INSERTSTR(m, "VC_ASSEMBLY_PUBLICKEYTOKEN", _VC_ASSEMBLY_PUBLICKEYTOKEN);
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|
#endif
|
|
#ifdef _CRT_ASSEMBLY_VERSION
|
|
INSERTSTR(m, "CRT_ASSEMBLY_VERSION", _CRT_ASSEMBLY_VERSION);
|
|
#endif
|
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#ifdef __LIBRARIES_ASSEMBLY_NAME_PREFIX
|
|
INSERTSTR(m, "LIBRARIES_ASSEMBLY_NAME_PREFIX",
|
|
__LIBRARIES_ASSEMBLY_NAME_PREFIX);
|
|
#endif
|
|
|
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#undef INSERTSTR
|
|
|
|
/* constants for the 2010 crt versions */
|
|
#if defined(_VC_CRT_MAJOR_VERSION) && defined (_VC_CRT_MINOR_VERSION) && defined(_VC_CRT_BUILD_VERSION) && defined(_VC_CRT_RBUILD_VERSION)
|
|
PyObject *version = PyUnicode_FromFormat("%d.%d.%d.%d",
|
|
_VC_CRT_MAJOR_VERSION,
|
|
_VC_CRT_MINOR_VERSION,
|
|
_VC_CRT_BUILD_VERSION,
|
|
_VC_CRT_RBUILD_VERSION);
|
|
if (PyModule_Add(m, "CRT_ASSEMBLY_VERSION", version) < 0) {
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
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static PyModuleDef_Slot msvcrt_slots[] = {
|
|
{Py_mod_exec, exec_module},
|
|
{Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
|
|
{Py_mod_gil, Py_MOD_GIL_NOT_USED},
|
|
{0, NULL}
|
|
};
|
|
|
|
static struct PyModuleDef msvcrtmodule = {
|
|
.m_base = PyModuleDef_HEAD_INIT,
|
|
.m_name = "msvcrt",
|
|
.m_methods = msvcrt_functions,
|
|
.m_slots = msvcrt_slots,
|
|
};
|
|
|
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PyMODINIT_FUNC
|
|
PyInit_msvcrt(void)
|
|
{
|
|
return PyModuleDef_Init(&msvcrtmodule);
|
|
}
|