2014/1/14-2/5 [Computer/SW/Languages/C_Cplusplus] UID:54763 Activity:nil | 1/14 Why is NULL defined to be "0" in C++ instead of "((void *) 0)" like in
C? I have some overloaded functtions where one takes an integer
parameter and the other a pointer parameter. When I call it with
"NULL", the compiler matches it with the integer version instead of
the pointer version which is a problem. Other funny effect is that
sizeof(NULL) is different from sizeof(myPtr). Thanks.
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2011/3/7-4/20 [Computer/SW/Languages/C_Cplusplus] UID:54056 Activity:nil | 3/7 I have a C question. I have the following source code in two identical
files t.c and t.cpp:
#include <stdlib.h>
int main(int argc, char *argv[]) {
const char * const * p1;
const char * * p2;
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2009/7/21-24 [Computer/SW/Languages/Java] UID:53168 Activity:moderate | 7/20 For those who care btw, it looks like eclipse is now A Standard Tool
at UCB ugrad cs, probably replaced emacs. Furthermore, people get
angry at seeing Makefiles, (since eclispe takes care of that). I
guess it's just a sign of the times.
\_ The more people at my work use eclipse the less the code is
managable in emacs. I'm not sure which application's fault
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2007/3/9-11 [Computer/SW/Languages/C_Cplusplus] UID:45917 Activity:nil 54%like:45865 | 3/9 When I start trn in a shell, I always get this:
"*** glibc detected *** malloc(): memory corruption: 0x08091600 ***
Abort"
But when I run trn inside the shell buffer in emacs, the problem
doesn't happen. Any idea? Thanks.
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2006/1/25-27 [Computer/HW/Memory] UID:41522 Activity:nil | 1/25 I'm working on a program in windows which is having memory problems.
When I allocate memory with new or malloc, it seems to reserve more
memory than I request (using VM Valiator to monitor this). Even if I
delete the memory there is still a "reserved" chunk that doesn't seem
to ever get used by other code. I'm using VC++ 6 btw. Anyone have an
idea of what might be going on?
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2005/9/9-13 [Computer/SW/OS/OsX] UID:39595 Activity:low | 9/9 Does OSX gcc still not support weak symbol definitions? ie, I
can't redefine malloc or new? (In this case actually I'm defining
something as weak, either with #pragma weak or
__attribute__((weak)) but OSX doesn't seem to support either!)
-jrleek
\- hello, have you tried __attribute__((weak_import)). what gcc
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2005/6/24-27 [Computer/SW/SpamAssassin] UID:38285 Activity:nil | 6/24 In my procmail log file, it says:
csh in malloc(): warning: recursive call
Out of memory.
What is the meaning of this?
\_ helps if you show us your .procmailrc
\_ It's hundreds of lines long. I was thinking it was
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2005/6/23-25 [Computer/SW/Languages/C_Cplusplus] UID:38255 Activity:low | 6/22 Technical question: My friend is trying to program a
single-threaded signal based server. He's using the icc compiler
on 64-bit linux. However, the following problem comes up. The
server is working and calls malloc. Malloc grabs the allocation
mutex (thread-safe!), then a signal comes in. The signal
interrupts malloc and calls the handler function. The handler
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2005/2/15-16 [Computer/SW/Languages/C_Cplusplus, Computer/SW/Compilers] UID:36174 Activity:moderate | 2/15 Technical question: we have a memory leak in our C code, we think,
but it's not the sort of memory leak where the memory's unreferenced.
What we'd like to do is sort of a poor-man's profile, we want
to know who calls our memory allocator "New"... Sorta like a stack
trace. Using an actual profiler is sort of difficult 'cause it's
a parallel application. Thanks, --peterm
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2005/1/24-26 [Computer/SW/Unix] UID:35874 Activity:low | 1/24 How do I find out the maximum allowable process size on lesbians?
\_ malloc
\_ uh, how about finding out without getting squished?
\_ Run "limit".
[ deleting bitch ]
\_ limit is a csh thing.
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2004/12/7-8 [Computer/SW/Languages/C_Cplusplus, Computer/SW/Languages] UID:35200 Activity:low | 12/7 Optimization time: gprof shows 310k calls to a certain constructor
(a very simple, very important object that is often stack-allocated
into large arrays- eg "MyObject msgs[1000];"). Rather than calling
the constructor 1000 times, is there a way to have a special array ctor
that's called (once) and zeroes out the array en masse? TIA.
\_ Geezus, why are you constructing 310k objects? Make a static array
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2012/7/19-11/7 [Computer/SW/Languages/C_Cplusplus] UID:54439 Activity:nil | 7/19 In C or C++, how do I write the code of a function with variable
number of parameters in order to pass the variable parameters to
another function that also has variable number of parameters? Thanks.
\_ The usual way (works on gcc 3.0+, Visual Studio 2005+):
#define foo(fmt, ...) printf(fmt, ##__VA_ARGS__)
The cool new way (works on gcc 4.3+):
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2009/4/30-5/6 [Computer/Theory] UID:52923 Activity:nil | 4/30 Sorting question! I have n sorted arrays of doubles. What's the
fastest way to sort them into 1 big sorted array?
\_ as mentioned below: you are describing one half of mergesort
\_ You really have to ask this question?
\_ You don't know either, huh?
\_ If three are n sorted arrays of m doubles each, I think the fastest
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2009/4/5-5/3 [Computer/SW/Languages, Computer/HW/Drives] UID:52801 Activity:nil | 4/5 Tuesday at 10:00PM I will be taking down Soda temporarily to migrate
disk arrays. This is an expected part of our move to the new server.
The downtime should be minimal - I'll be remounting /home read-only
for an hour or so while I run a final mirror over to the new array
and then will reboot Soda onto the new array. The final migration
will come at a slightly later time - this is in preparation for
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