WebIn Cython, index access on memory views is automatically translated into memory addresses. The following code requests a two-dimensional memory view of C int typed items and indexes into it: cdef int [ :,:] buf = exporting_object print(buf[1,2]) Negative indices work as well, counting from the end of the respective dimension: print(buf[-1,-2]) WebFeb 21, 2012 · Здравствуйте! Оптимизировал я однажды критический участок кода, и был там boost::shared_ptr… И понял я: не верю я библиотекам, хоть и пишут их дядьки умные. Детали под катом. Так вот, оптимизировал я...
Creating a shared_ptr from a unique_ptr with custom deleter
Webpyarrow.pyarrow_wrap_batch(const shared_ptr [CRecordBatch]& batch) → object ¶ Wrap the Arrow C++ record batch in a Python pyarrow.RecordBatch instance. … WebC provides the functions malloc () , realloc (), and free () for this purpose, which can be imported in cython from clibc.stdlib. Their signatures are: void* malloc(size_t size) void* realloc(void* ptr, size_t size) void free(void* ptr) A very simple example of malloc usage is the following: Pure Python Cython flyertalk andaz savannah
Passing C++ vector to Numpy through Cython without copying and …
http://duoduokou.com/cplusplus/40879342365180077325.html WebC11的智能指针是RAII（Resource Acquisition Is Initialization）机制的一种体现。详细的介绍请参见原文原文1 对RAII的介绍请参见这里原文2 考察较多的就是shared_ptr的手写实现了，这里不是源码，只是模拟实现。 template WebMay 24, 2024 · cdef shared_ptr [ C] derived = shared_ptr [ C ] ( new C ()) cdef [ A] base1 cdef shared_ptr [ A] base2 base1 = = derived If that doesn't work then it's fine Did try that one as well; doesn't quite work: don't spend more time on it though Change return value of operator= for shared_ptr be5e625 scoder added this to the 3.0 milestone on May 24, 2024 flyertalk ba forum