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Full Discussion: fgets problems
Top Forums Programming fgets problems Post 302397207 by achenle on Sunday 21st of February 2010 10:49:56 AM
Old 02-21-2010
Let me get this straight: you have a custom memory management library, and your code using that library crashes?

OK.

You need all the help you can get. But there's not much out there.

Your only hope is to do something like download a demo copy of Purify and use it. And then pray that you don't have any bugs in your custom library.

And good luck.

You're going to need it.

There's a reason why nobody writes their own memory management libraries. First off, the multiple libraries available for free on your OS of choice are almost certainly fast enough. If they're not, you're most likely doing something wrong, like an over-reliance on malloc()/free() and/or new/delete. And if the OS libaries truly aren't fast enough (and if you're not multithreaded on a massively parallel application, they ARE fast enough!), there are third-party memory management libraries available.

Go price something like Smartheap. Then calculate all the hours spent on your custom memory library and how much those hours cost. Want to bet Smartheap is cheaper? If you even need it in the first place.

There are probably literally thousands of man-years invested by many absolutely brilliant computer scientists and programmers in all the memory-management libraries available in today's operating systems. And those products have been thoroughly tested - for literally decades.

You want a car analogy? Writing your own memory management library is like chiseling out a stone wheel for a sports car. The only reason to do it is for the sake of doing it - as a hobby or academic learning experience. Because there's no way you can duplicate the engineering history behind a "normal" wheel. Even if you do manage to chisel out a wheel that manages to outperform a "normal" wheel in a tiny operating range, you'll never really know how durable your wheel is because it's totally untested.
 

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LEARN ABOUT MOJAVE

intro

INTRO(3)						   BSD Library Functions Manual 						  INTRO(3)

NAME

     intro -- introduction to the C libraries

DESCRIPTION

     This section provides an overview of the C library functions, their error returns and other common definitions and concepts.  Most of these
     functions are available from the System library, libSystem.  Other libraries must be indicated at compile time with the -l option of the com-
     piler.

     The various libraries (followed by the loader flag):

     libSystem (-lSystem)  Standard C library functions.  When using the C compiler cc(1), it is not necessary to supply the loader flag -lSystem
			   for these functions.  There are several `libraries' or groups of functions included inside of libSystem: the standard
			   I/O routines, database routines, bit operators, string operators, character tests and character operators, des encryp-
			   tion routines, storage allocation, time functions, signal handling and more.

			   For compatibility with other systems, which provide these capabilities in separate libraries (such as libc), symbolic
			   links are provided for -lc, -ldbm, -ldl, -linfo, -lm, -lpoll, -lpthread and -lrpcsvc; they all point to libSystem.

     libcurses (-lcurses -ltermcap)
			   Terminal independent screen management routines for two dimensional non-bitmap display terminals.  (See ncurses(3).)

     libl (-ll) 	   The library for lex(1).

     libtermcap (-ltermcap)
			   The terminal independent operation library package.	(See termcap(3).)

     liby (-ly) 	   The library for yacc(1).

FILES

     /usr/lib/libSystem.dylib	       the main System library
     /usr/lib/libSystem_debug.dylib    the main System library compiled with debug support
     /usr/lib/libSystem_profile.dylib  the main System library compiled for profiling

SEE ALSO

     cc(1), ld(1), nm(1), intro(2), stdio(3)

HISTORY

     An intro manual appeared in Version 7 AT&T UNIX.

BSD
								   Aug 17, 2006 							       BSD
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