blob: 358045364cbc8370150398142302943b82ad7ba6 [file] [log] [blame]
Gregory P. Smith365a1862009-02-12 07:35:29 +00001/* Common code for use by all hashlib related modules. */
2
3/*
4 * Given a PyObject* obj, fill in the Py_buffer* viewp with the result
Ned Deilybd143c32013-08-01 22:12:29 -07005 * of PyObject_GetBuffer. Sets an exception and issues a return NULL
Gregory P. Smith365a1862009-02-12 07:35:29 +00006 * on any errors.
7 */
8#define GET_BUFFER_VIEW_OR_ERROUT(obj, viewp) do { \
9 if (PyUnicode_Check((obj))) { \
10 PyErr_SetString(PyExc_TypeError, \
11 "Unicode-objects must be encoded before hashing");\
12 return NULL; \
13 } \
14 if (!PyObject_CheckBuffer((obj))) { \
15 PyErr_SetString(PyExc_TypeError, \
16 "object supporting the buffer API required"); \
17 return NULL; \
18 } \
19 if (PyObject_GetBuffer((obj), (viewp), PyBUF_SIMPLE) == -1) { \
20 return NULL; \
21 } \
22 if ((viewp)->ndim > 1) { \
23 PyErr_SetString(PyExc_BufferError, \
24 "Buffer must be single dimension"); \
25 PyBuffer_Release((viewp)); \
26 return NULL; \
27 } \
28 } while(0);
Christian Heimes4a0270d2012-10-06 02:23:36 +020029
30/*
31 * Helper code to synchronize access to the hash object when the GIL is
32 * released around a CPU consuming hashlib operation. All code paths that
Martin Panter7462b6492015-11-02 03:37:02 +000033 * access a mutable part of obj must be enclosed in an ENTER_HASHLIB /
Christian Heimes4a0270d2012-10-06 02:23:36 +020034 * LEAVE_HASHLIB block or explicitly acquire and release the lock inside
35 * a PY_BEGIN / END_ALLOW_THREADS block if they wish to release the GIL for
36 * an operation.
37 */
38
39#ifdef WITH_THREAD
40#include "pythread.h"
41 #define ENTER_HASHLIB(obj) \
42 if ((obj)->lock) { \
43 if (!PyThread_acquire_lock((obj)->lock, 0)) { \
44 Py_BEGIN_ALLOW_THREADS \
45 PyThread_acquire_lock((obj)->lock, 1); \
46 Py_END_ALLOW_THREADS \
47 } \
48 }
49 #define LEAVE_HASHLIB(obj) \
50 if ((obj)->lock) { \
51 PyThread_release_lock((obj)->lock); \
52 }
53#else
54 #define ENTER_HASHLIB(obj)
55 #define LEAVE_HASHLIB(obj)
56#endif
57
58/* TODO(gps): We should probably make this a module or EVPobject attribute
59 * to allow the user to optimize based on the platform they're using. */
60#define HASHLIB_GIL_MINSIZE 2048
61