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b420ed8248
This change gets the Python codebase into a state where it conforms to the conventions of this codebase. It's now possible to include headers from Python, without worrying about ordering. Python has traditionally solved that problem by "diamonding" everything in Python.h, but that's problematic since it means any change to any Python header invalidates all the build artifacts. Lastly it makes tooling not work. Since it is hard to explain to Emacs when I press C-c C-h to add an import line it shouldn't add the header that actually defines the symbol, and instead do follow the nonstandard Python convention. Progress has been made on letting Python load source code from the zip executable structure via the standard C library APIs. System calss now recognizes zip!FILENAME alternative URIs as equivalent to zip:FILENAME since Python uses colon as its delimiter. Some progress has been made on embedding the notice license terms into the Python object code. This is easier said than done since Python has an extremely complicated ownership story. - Some termios APIs have been added - Implement rewinddir() dirstream API - GetCpuCount() API added to Cosmopolitan Libc - More bugs in Cosmopolitan Libc have been fixed - zipobj.com now has flags for mangling the path - Fixed bug a priori with sendfile() on certain BSDs - Polyfill F_DUPFD and F_DUPFD_CLOEXEC across platforms - FIOCLEX / FIONCLEX now polyfilled for fast O_CLOEXEC changes - APE now supports a hybrid solution to no-self-modify for builds - Many BSD-only magnums added, e.g. O_SEARCH, O_SHLOCK, SF_NODISKIO
68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
#ifndef COSMOPOLITAN_THIRD_PARTY_PYTHON_MODULES_HASHLIB_H_
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#define COSMOPOLITAN_THIRD_PARTY_PYTHON_MODULES_HASHLIB_H_
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/* clang-format off */
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/* Common code for use by all hashlib related modules. */
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/*
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* Given a PyObject* obj, fill in the Py_buffer* viewp with the result
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* of PyObject_GetBuffer. Sets an exception and issues the erraction
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* on any errors, e.g. 'return NULL' or 'goto error'.
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*/
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#define GET_BUFFER_VIEW_OR_ERROR(obj, viewp, erraction) do { \
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if (PyUnicode_Check((obj))) { \
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PyErr_SetString(PyExc_TypeError, \
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"Unicode-objects must be encoded before hashing");\
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erraction; \
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} \
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if (!PyObject_CheckBuffer((obj))) { \
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PyErr_SetString(PyExc_TypeError, \
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"object supporting the buffer API required"); \
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erraction; \
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} \
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if (PyObject_GetBuffer((obj), (viewp), PyBUF_SIMPLE) == -1) { \
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erraction; \
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} \
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if ((viewp)->ndim > 1) { \
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PyErr_SetString(PyExc_BufferError, \
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"Buffer must be single dimension"); \
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PyBuffer_Release((viewp)); \
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erraction; \
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} \
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} while(0)
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#define GET_BUFFER_VIEW_OR_ERROUT(obj, viewp) \
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GET_BUFFER_VIEW_OR_ERROR(obj, viewp, return NULL)
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/*
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* Helper code to synchronize access to the hash object when the GIL is
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* released around a CPU consuming hashlib operation. All code paths that
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* access a mutable part of obj must be enclosed in an ENTER_HASHLIB /
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* LEAVE_HASHLIB block or explicitly acquire and release the lock inside
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* a PY_BEGIN / END_ALLOW_THREADS block if they wish to release the GIL for
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* an operation.
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*/
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#ifdef WITH_THREAD
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#include "third_party/python/Include/pythread.h"
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#define ENTER_HASHLIB(obj) \
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if ((obj)->lock) { \
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if (!PyThread_acquire_lock((obj)->lock, 0)) { \
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Py_BEGIN_ALLOW_THREADS \
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PyThread_acquire_lock((obj)->lock, 1); \
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Py_END_ALLOW_THREADS \
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} \
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}
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#define LEAVE_HASHLIB(obj) \
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if ((obj)->lock) { \
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PyThread_release_lock((obj)->lock); \
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}
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#else
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#define ENTER_HASHLIB(obj)
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#define LEAVE_HASHLIB(obj)
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#endif
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/* TODO(gps): We should probably make this a module or EVPobject attribute
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* to allow the user to optimize based on the platform they're using. */
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#define HASHLIB_GIL_MINSIZE 2048
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#endif /* COSMOPOLITAN_THIRD_PARTY_PYTHON_MODULES_HASHLIB_H_ */
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