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by: Thomas Baruchel |
last post by:
Hi,
wondering about:
func1: setjmp() ; func2();
func2: {FILE *f; f = fopen(); func3(); fclose(f)}
func3 : if() longjmp; else return;
Note that FILE *fis a local variable in func2.
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by: someone |
last post by:
I have *thought* that setjmp/longjmp() should take a pointer to
jmp_buf. And the calling function should hold the actual struct data.
But ... I trid on both Win32 and Linux, it seems that
setjmp/longjmp() are taking stuct:
c:\> dmc sj.c (Digital Mars Compiler Version 8.38n)
link sj,,,user32+kernel32/noi;
c:\> sj.exe
sizeof(jmp_buf) = 64
----------------------------------------------------------------- sj.c
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by: Michael B Allen |
last post by:
Should setjmp/longjmp really be used in a fast mundane ANSI C piece of
code? Or is it frowned apon like goto? I have a need but I don't want to
use something that is costly, isn't supported consistenly, or something
that might pull in exotic text segments, etc.
Specifically I have a hairly algorithm loop that uses what is currently
a macro V. Here's a snipplet:
for (k = d; k >= -d; k -= 2) {
if (k == -d || (k != d && V(fwd, m, k - 1)...
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by: Jrferguson |
last post by:
I have a C program that I am trying to port to a Motorola 68k based system. It
makes use of setjmp and longjmp which are not supported by my C compiler. I
understand the general principle behind setjmp/longjmp, but I am somewhat lost
in the detail of how to actually implement this in assembler. (My compiler
supports in-line assembler which I hope will prove usefull). I will be very
gratefull for any help or pointers with this problem. I am...
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by: candy |
last post by:
hi all,
Consider the following C code:
void funct(){
}
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by: JS |
last post by:
When setjmp is called how can the if statement evaluate to true or false
when setjmp only returns 0 or non-zero?
struct pcb {
void *(*start_routine) (void *);
void *arg;
jmp_buf state;
int stack;
};
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by: Zheng Da |
last post by:
I wrote a simple one as follow:
typedef struct __myjmp_buf
{
int efp;
int epc;
}myjmp_buf;
int mysetjmp(myjmp_buf env)
{
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by: Sreekanth |
last post by:
Hi All
I am trying to write a code in which I have to access an array of
jmp_buf
so i have declared it as jmp_buf mybuf
Now when i am doing a longjmp
like
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by: rover8898 |
last post by:
Hello all,
I used setjmp() in a recent of program of mine (it is not completed, so
I have not the chance to test it out yet). I am not very profocient in
C coding as are some of my co-workers. They (my co-workers) say (with
vehement ardor ;) ) that the usage of setjmp() emplyoyed in function"C"
that was called from function "B" that was called from function "A"
that was called form the main(), will cause havoc in the stack. And it
makes...
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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