Stack Overflow
Stack Overflow

Questions tagged [c-api]

154 questions
1
vote
2 answers

Accessing numpy array data in C (for numpy 1.7+)

Following examples and the numpy C-API (http://docs.scipy.org/doc/numpy/reference/c-api.html), I'm trying to access numpy array data in cpp, like this: #include #include #define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION //…
El Sampsa
  • 1,673
  • 3
  • 17
  • 33
1
vote
1 answer

MySQL table is marked as crashed, how to get the crashed table by query

I want to get crashed table list from query by C API. I know about mysqlcheck --auto-repair --check --all-database command and repair table db_name.table_name in the cli, but I can't find out how to get the crashed table name by query. I just want…
J.H
  • 63
  • 1
  • 1
  • 6
1
vote
1 answer

DBus: measure the time for data exchange using direct dbus APIs

I am looking for an example c code to measure the amount of time its taking to send data between two simple applications without using any glib bindings, I see in many posts that http://www.matthew.ath.cx/misc/dbus has an example but the link does…
enthu
  • 69
  • 11
1
vote
1 answer

Python C API with recursion - segfaults

I'm using python's C API (2.7) in C++ to convert a python tree structure into a C++ tree. The code goes as follows: the python tree is implemented recursively as a class with a list of children. the leaf nodes are just primitive integers (not class…
rmp251
  • 5,018
  • 4
  • 34
  • 46
1
vote
1 answer

How to measure in-memory SQLite database size with C API?

I'm making a stress test for in-memory SQLite db in iOS. After for a while, OCUnit fired this error. otest(79450,0xad21a2c0) malloc: *** mmap(size=40267776) failed (error code=12) *** error: can't allocate region *** set a breakpoint in…
eonil
  • 83,476
  • 81
  • 317
  • 516
0
votes
2 answers

MATLAB C API: What does mxDestroyArray(NULL) do?

I use MATLAB's mxDestroyArray() function and wonder how to do proper error handling. If I called mxCreate*Array() or similiar, I get a valid pointer on success and NULL on failure, i. e. if memory is full. If I create several arrays in this way and…
glglgl
  • 89,107
  • 13
  • 149
  • 217
0
votes
0 answers

No error on socket though the bound network interface doesn't exist anymore

I have a server application which binds a server socket to a Linux network device which got created after I have hot-plugged an corresponding USB-Ethernet adapter to an USB port of my local machine: // Bind the socket to the network device…
Degoah
  • 375
  • 1
  • 2
  • 12
0
votes
1 answer

Crash when trying to call ruby regex from c code

This post is a continuation of my previous post: (Call to ruby regex through C api from C code not working) I did a few modifications and now I am calling the rb_reg_regcomp with "*". #include #include "ruby/re.h" #define MAX_INPUT_SIZE…
Some nerd who does not have a
  • 70
  • 1
  • 7
0
votes
0 answers

WebAssembly (WASM) with Tensorflow's c_api

Is it possible to compile an application running the tensorflow c_api on GPU by using emscripten. Will it run in the browser and utilize the GPU given that there is one? I have code that can be run using CPU or GPU depending on the c_api dll…
YScharf
  • 1,638
  • 15
  • 20
0
votes
0 answers

How to use PyArg_ParseTuple to get an unconverted PyObject

I am trying to pass a python object from python to a C module without converting it, but I get a weird error. I copied most of the code from an example in the python documentation and only changed the spam_system method in spammodule.cpp. I am…
Justin Alias
  • 1
0
votes
0 answers

Tensorflow C-API: Memory location of result tensors of TF_SessionRun

I need information about the memory allocation of the C-Api of tensorflow, especially of the tensors of the output for TF_SessionRun. I would like for those tensors to remain in the memory of the GPU, but from what I can see, It seems to be…
user2762996
  • 566
  • 1
  • 5
  • 16
0
votes
1 answer

Creating alternative C API for existing library

Is it considered a bad practice to expose different type names in API and not use types from the library itself? If there is a library like this: struct Internal { int first; float second; }; int foo(struct Internal); typedef enum { …
Scaramouche
  • 1
0
votes
0 answers

numpy C-API extension fails to compile in separated file

Currently writing a C extension for Python, I successfully compiled and use the numpy C-API within the main/loader file of the module extension. I am now trying to move the logic into a different C file. Following the documented procedure, I set up…
G.Launay
  • 33
  • 7
0
votes
0 answers

Mysql / MariaDB - Select statement where condition for array or list of values

In Oracle ProC - we can give an array of values in where condition of a field.. i.e. Select * from employee where emp_id = :m_emp_id here m_emp_id is an array of employee ids. i.e. int m_emp_id[5] ; and array contains 5 empids: 100 - 104 In MariaDB…
shibendra chakraborty
  • 91
  • 1
  • 1
  • 5
0
votes
1 answer

How to use mysql_fetch_row multiple times without getting NULL value (C++) (MySQL C API)

I'm making a RPG item/magic manager, and I'm trying to handle the case if the person choose a number that does not exist, but mysql_fetch_row keeps returning NULL when it runs for the second time. I think I would need to run res =…
Yasushiki
  • 11
  • 3
1 2 3
…
10 11