| | @cython.final |
| | @cython.internal |
| | cdef class _MemDebug: |
| | """Debugging support for the memory allocation in libxml2. |
| | """ |
| | def bytes_used(self): |
| | """bytes_used(self) |
| | |
| | Returns the total amount of memory (in bytes) currently used by libxml2. |
| | Note that libxml2 constrains this value to a C int, which limits |
| | the accuracy on 64 bit systems. |
| | """ |
| | return tree.xmlMemUsed() |
| |
|
| | def blocks_used(self): |
| | """blocks_used(self) |
| | |
| | Returns the total number of memory blocks currently allocated by libxml2. |
| | Note that libxml2 constrains this value to a C int, which limits |
| | the accuracy on 64 bit systems. |
| | """ |
| | return tree.xmlMemBlocks() |
| |
|
| | def dict_size(self): |
| | """dict_size(self) |
| | |
| | Returns the current size of the global name dictionary used by libxml2 |
| | for the current thread. Each thread has its own dictionary. |
| | """ |
| | c_dict = __GLOBAL_PARSER_CONTEXT._getThreadDict(NULL) |
| | if c_dict is NULL: |
| | raise MemoryError() |
| | return tree.xmlDictSize(c_dict) |
| |
|
| | def dump(self, output_file=None, byte_count=None): |
| | """dump(self, output_file=None, byte_count=None) |
| | |
| | Dumps the current memory blocks allocated by libxml2 to a file. |
| | |
| | The optional parameter 'output_file' specifies the file path. It defaults |
| | to the file ".memorylist" in the current directory. |
| | |
| | The optional parameter 'byte_count' limits the number of bytes in the dump. |
| | Note that this parameter is ignored when lxml is compiled against a libxml2 |
| | version before 2.7.0. |
| | """ |
| | cdef Py_ssize_t c_count |
| | if output_file is None: |
| | output_file = b'.memorylist' |
| | elif isinstance(output_file, unicode): |
| | output_file.encode(sys.getfilesystemencoding()) |
| |
|
| | f = stdio.fopen(output_file, "w") |
| | if f is NULL: |
| | raise IOError(f"Failed to create file {output_file.decode(sys.getfilesystemencoding())}") |
| | try: |
| | if byte_count is None: |
| | tree.xmlMemDisplay(f) |
| | else: |
| | c_count = byte_count |
| | tree.xmlMemDisplayLast(f, c_count) |
| | finally: |
| | stdio.fclose(f) |
| |
|
| | def show(self, output_file=None, block_count=None): |
| | """show(self, output_file=None, block_count=None) |
| | |
| | Dumps the current memory blocks allocated by libxml2 to a file. |
| | The output file format is suitable for line diffing. |
| | |
| | The optional parameter 'output_file' specifies the file path. It defaults |
| | to the file ".memorydump" in the current directory. |
| | |
| | The optional parameter 'block_count' limits the number of blocks |
| | in the dump. |
| | """ |
| | if output_file is None: |
| | output_file = b'.memorydump' |
| | elif isinstance(output_file, unicode): |
| | output_file.encode(sys.getfilesystemencoding()) |
| |
|
| | f = stdio.fopen(output_file, "w") |
| | if f is NULL: |
| | raise IOError(f"Failed to create file {output_file.decode(sys.getfilesystemencoding())}") |
| | try: |
| | tree.xmlMemShow(f, block_count if block_count is not None else tree.xmlMemBlocks()) |
| | finally: |
| | stdio.fclose(f) |
| |
|
| | memory_debugger = _MemDebug() |
| |
|
