Function pointer to inline function ? Post: 302357950

Login or Register to Ask a Question and Join Our Community

Sponsored Content

Top Forums Programming Function pointer to inline function ? Post 302357950 by emitrax on Thursday 1st of October 2009 03:59:12 AM

Old

10-01-2009

Registered User

Quote:

Originally Posted by Corona688

Optimization can cause errors in programs with subtle bugs. Places where accidental writing to stack or incidental return values hadn't mattered before, suddenly may. Proper programming practices will circumvent this, and the benefits of optimization can be very good.

Indeed. That's why I said I'll leave optimization as my last option.

First I'll make it fast and correct (hopefully bug free), then switch to optimization to make
it even faster (even if of a small percentage). At that stage, if a bugs come up, it is easier to find. At least, that's what I've learned.

---------- Post updated at 02:59 AM ---------- Previous update was at 02:51 AM ----------

Quote:

Originally Posted by jim mcnamara

Try a static link - that is one easy way to profile shared routines.

Hmm... interesting.

Quote:

Originally Posted by jim mcnamara

However try these as base assumptions:

most of the problems you have are yours, not library code

In fact, the library is mine! :-D I developed it.

Quote:

Originally Posted by jim mcnamara

algorithms and proper program design give the best return on optimization by far
code tricks result in very minor gains

Indeed! I'm not trying to achieve optimization with this kind of tricks.
As I said, I still haven't profiled my code and my post was only about how
to best resolve that particular problem (decoding a payload which byte order
is based on a header flag, which can only be known at runtime).

Quote:

Originally Posted by jim mcnamara

Do you know about aio (asynchronous I/O)? try reading up on that. It is often used in high demand high volume I/O design (disk). I think it is still not fully supported for sockets in Linux. I don't know for sure.

Yes. I've already read about aio and I did consider it. I might use it for dumping
the data, I receive from the net.

Quote:

Originally Posted by jim mcnamara

gprof - this is a good as there is:
GNU gprof

Thanks for the whole reply!

emitrax

View Public Profile for emitrax

Find all posts by emitrax

10 More Discussions You Might Find Interesting

1. Programming

Will exe file size decrease while using inline function

using namespace std; void g(); class A { public : A() { g();g();g(); cout << "Constructor of A"<< endl ;} }; inline void g(){ cout << "vijay" <<endl; } int main() { A a; } when i use inline i get size 303488 Aug 31 12:05 a.out* when not using inline i get size 303572 Aug 31...

2. Programming

Problem with function which reutrns pointer to a value

i have a function: char *pcCityIdToCountryName(ADMIN_DB_DATA *pstHEader, unit uiCityID) this returns a pointer to CountryName if cityId is given. to retrieve countryname i give: char *CountryName; CountryName = pcCityIdToCountryName(..................); but when i compile it is giving :...

3. Programming

How to return void function pointer

Hello all im trying to build function that will return void function pointer what is mean is ( not working ) the main function void * myClass::getFunction(int type){ if(type==1) return &myClass::Test1; if(type==2) return &myClass::Test2; } void myClass::Test1(){...

4. Programming

Inline function inside Classes

#include <iostream> using namespace std; class A { public: int Getvalue() { return i;} private: int i; }; int main() {} The above code compiles properly in g++ or in any other C++ compiler. BUT, the variable 'i' is used (in 'return i' statement) before it is...

5. Programming

Function Returning Pointer

Hi guys. how a functions such fdopen, ... can return pointer? are these functions use static memory(variables)?

6. Programming

structure pointer array as function parameters

if i create an array of pointers to a structure "struct node" as: struct node *r; and create "n" number of "linked lists" and assign it to the various struct pointers r using some function with a return type as structure pointer as: r=multiplty(.......) /*some parameters*/ is...

7. Programming

Trivial doubt about C function pointer

Hi, In the below C code, #include <stdio.h> void print() { printf("Hello\n"); } int main() { void (*f)() = (void (*)()) print; f(); (*f)(); } I wonder, how the syntaxes "f()" and "(*f)()" are treated as same without any error? Is this an improvement or ANSI/ISO...

8. Programming

Pure C function pointer on printing vowels twice

Have difficulty to understand this pure C code to only print vowels twice from input string. Questions are commented at the end of each place. #include <stdio.h> #include <stdlib.h> #include <assert.h> #include <limits.h> /* *Demonstrate the use of dispatch tables */ /*Print a char...

9. Programming

Segmentation fault when I pass a char pointer to a function in C.

I am passing a char* to the function "reverse" and when I execute it with gdb I get: Program received signal SIGSEGV, Segmentation fault. 0x000000000040083b in reverse (s=0x400b2b "hello") at pointersExample.c:72 72 *q = *p; Attached is the source code. I do not understand why...

10. Shell Programming and Scripting

Function - Make your function return an exit status

Hi All, Good Day, seeking for your assistance on how to not perform my 2nd, 3rd,4th etc.. function if my 1st function is in else condition. #Body function1() { if then echo "exist" else echo "not exist" } #if not exist in function1 my all other function will not proceed....