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Clear n-th bit: bit_fld &= ~(1 << n)
Toggle (swap 0<->1) n-th bit: bit_fld ^= (1 << n)
Check if the element is in the vector or list
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| Code Block |
|---|
#include <string>
#include <iostream>
#include <stdio.h>
std::string exec(char* cmd) {
FILE* pipe = popen(cmd, "r");
if (!pipe) return "ERROR";
char buffer[128];
std::string result = "";
while(!feof(pipe)) {
if(fgets(buffer, 128, pipe) != NULL)
result += buffer;
}
pclose(pipe);
return result;
} |
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Valgrind - analysis of job memory consumption
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valgrind --tool=massif --time-unit=B psana -n 1 -m ImgAlgos.PixCoordsProducer exp=cxi86415:run=62 |
this command runs the job and produces the file like massif.out.23864, which can be printed by command:
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ms_print massif.out.23864 |
Building C/C++ library using distutils.core setup, Extension
http://stackoverflow.com/questions/16854066/using-distutils-and-build-clib-to-build-c-library
Instead of passing a library name as a string, pass a tuple with the sources to compile:
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|---|
# setup.py
#__________
import sys
from distutils.core import setup
from distutils.command.build_clib import build_clib
from distutils.extension import Extension
from Cython.Distutils import build_ext
libhello = ('hello', {'sources': ['hello.c']}) # <<<<==============
ext_modules=[
Extension("demo", ["demo.pyx"])
]
setup(
name = 'demo',
libraries = [libhello],
cmdclass = {'build_clib': build_clib, 'build_ext': build_ext},
ext_modules = ext_modules
)
#__________
|
Using C++ in Cython
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