Tilted Forum Project Discussion Community  

Go Back   Tilted Forum Project Discussion Community > Interests > Tilted Technology


 
 
LinkBack Thread Tools
Old 11-23-2003, 07:36 PM   #1 (permalink)
Crazy
 
Location: Nova Scotia, Canada
Wait() Command in C?

(if this isn't an apropriate place to post this I appologise)

Ok here's the thing.
I'm one of those extreamly dorky kids who didn't have any computer related class in public school but learnt a few programming languages anyway.
So now that I'm finally in university (csci) first year has been a breeze.

Anyway, enough stupid background info.

I'm making a program that creates a silly little ascii graphic, but it's supposed to be animated and change (using clrscr() in the non-standard conio.h)

Here's my problem though. I want there to be a short delay in between each update of the picture. (so it doesn't flicker as an unconprehensibale speed)

What I'm looking for is a function something like
Code:
void wait(int time);
where time is the amout of time you want the program to wait untill it executes the next statement.

So far I'm just lagging the program with a horrible, horrible recursive function. It works rather well but it's an awful hack.

Any suggestions would please me to no end.

ps. please forgive the large amount of personal pronouns!
__________________
Ask a simple question... get pain.
Marburg is offline  
Old 11-23-2003, 09:18 PM   #2 (permalink)
Psycho
 
sprocket's Avatar
 
Location: In transit
try sleep

This looks like what your looking for (if you are on unix or linux):


Quote:
SLEEP(3) Linux
Programmer's Manual SLEEP(3)



NAME

sleep - Sleep for the specified number of seconds

SYNOPSIS

#include <unistd.h>

unsigned int sleep(unsigned int seconds);

DESCRIPTION

sleep() makes the current process sleep until seconds seconds have elapsed or a signal arrives which is not ignored.

RETURN VALUE

Zero if the requested time has elapsed, or the number of seconds left
to sleep.

CONFORMING TO POSIX.1

BUGS

sleep() may be implemented using SIGALRM; mixing calls to alarm() and
sleep() is a bad idea.

Using longjmp() from a signal handler or modifying the handling of SIGALRM while sleeping will cause undefined results.

SEE ALSO

signal(2), alarm(2)




GNU 1993-04-07 SLEEP(3)
Im not much of a C programmer but i dont think windows would have unistd.h.

If your on windows check out MSDN:

http://msdn.microsoft.com/library/de...base/sleep.asp
__________________
Remember, wherever you go... there you are.
sprocket is offline  
Old 11-23-2003, 09:22 PM   #3 (permalink)
Junkie
 
Location: North Hollywood
windows has Sleep which is in millliseconds time.h iirc

also if you can't find a sleep you can nearly always find a clock
so all youd have to do is

start = clock();
{
diff = clock()-start;
}while(diff<1000);

while its pretty horrible in a multitasking os , if its all you have it'll work fine

clrscr and conio.h sounds like dos maybe ?

charliex is offline  
Old 11-24-2003, 08:34 PM   #4 (permalink)
Crazy
 
Location: Nova Scotia, Canada
Thanks for the the great info people!

I couldn't use the first tip since i'm coding in windows (for now)

But the second worked perfectly!
It was simple to make into a little function.
Wee!
/me is pleased
__________________
Ask a simple question... get pain.
Marburg is offline  
Old 11-25-2003, 12:21 AM   #5 (permalink)
 
KnifeMissile's Avatar
 
Location: Waterloo, Ontario
Umm, Sleep() is an MS Windows function. You can't use it?

I'd recommend Sleep() over a self-made busy wating routine, unless you're unconcerned about bogging down your processor...
KnifeMissile is offline  
Old 11-25-2003, 01:47 PM   #6 (permalink)
Crazy
 
Location: Nova Scotia, Canada
i'm attempting to avoid OS specific code though.
__________________
Ask a simple question... get pain.
Marburg is offline  
Old 11-25-2003, 02:14 PM   #7 (permalink)
Junkie
 
Location: North Hollywood
yeah as i said the testing loop is pretty bad in a multitasking os, but if you only use it in short bursts it'll be ok ( given that you can't use a thread dormant method)

in windows, the clock method would put you around 80% cpu usage, the Sleep method would put you in the < 15% which is normal system idle.
charliex is offline  
Old 11-25-2003, 05:06 PM   #8 (permalink)
kel
WARNING: FLAMMABLE
 
Location: Ask Acetylene
There is a sleep function in the C standard library.
[EDIT] Oops... I'm wrong[/EDIT]
__________________
"It better be funny"

Last edited by kel; 11-25-2003 at 07:34 PM..
kel is offline  
Old 11-25-2003, 07:31 PM   #9 (permalink)
Junkie
 
Location: North Hollywood
if you mean the ansi C stdlib then there isn't, theres no sleep, or delay.

N794 so its a little older but its not in newer versions either.
http://www.vmunix.com/~gabor/c/draft.html

you might be mistaking an add on sleep function added by an os or a compiler suite.

MS's version of sleep does pretty much the same as what i posted, last time i checked it.
[edit]
I rechecked MS's version of sleep which is _sleep, its basically a wrapper that calls Sleep, first checking to see if its a zero argument and then incrementing it.

often with MS's VC functions since they are quite often just ever so slightly different they add an _ but just as often theres a #define to set sleep to _sleep

Last edited by charliex; 11-25-2003 at 09:08 PM..
charliex is offline  
 

Tags
command, wait

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 09:07 PM.

Tilted Forum Project

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
© 2002-2012 Tilted Forum Project

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360