proper usage of loop wait(1)

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proper usage of loop wait(1) #340393 09/03/10 18:58 09/03/10 18:58
Joined: Sep 2009 Posts: 1,034 Budapest Aku_Aku OP Serious User
Aku_Aku OP Serious User Joined: Sep 2009 Posts: 1,034 Budapest	What would be the proper usage of loop wait(1)? Can i use that? In this situation: In the loop i call a function that writes some records into a file. Sometimes it could happen the write slows down. So i put a wait_for after the function call, inside the loop. Will the engine handle properly my file updater function? I am afraid the calls will accumulate and maybe they have to wait the end of the function. And it will go infinitely...

Re: proper usage of loop wait(1) [Re: Aku_Aku] #340410 09/03/10 21:31 09/03/10 21:31
Joined: Jul 2008 Posts: 1,178 England M MrGuest Serious User
MrGuest Serious User M Joined: Jul 2008 Posts: 1,178 England	depending where you call it from there's no reason to doubt it will work if you're trying something like Code: for(i=0;i<10000;i++){ then dependant on how many functions are being called, it's probably best to use wait(1) (e.g at every 100th iternation), though if you're only writing something like Code: for(i=0;i<3;i++){ ... wait(1); then it's not really worthwhile the engine wait 3 frames for 'no reason' as a rule i only use wait(1); if something is going to be hogging the cpu, and if it's not critical it's done by a certain time otherwise i'll use wait(1) while i'm waiting for something to happen, obvious reason while(!player){wait(1);} but if there's a function that's returning a result, then you'll undoubtedly require wait_for() but you need to ensure this is the only time this function is being called and returned

Re: proper usage of loop wait(1) [Re: MrGuest] #340436 09/04/10 11:43 09/04/10 11:43
Joined: Sep 2009 Posts: 1,034 Budapest Aku_Aku OP Serious User
Aku_Aku OP Serious User Joined: Sep 2009 Posts: 1,034 Budapest	My program works like this: Code: main() { while(1) { myfunc(); wait_for(myfunc); wait(1); } } void myfunc() { do some writes into the file } Because there are a lot of activity in my program i am afraid the queue with functions waiting processing will increased seconds by seconds. Last edited by Aku_Aku; 09/04/10 11:44.

Re: proper usage of loop wait(1) [Re: Aku_Aku] #340453 09/04/10 14:10 09/04/10 14:10
Joined: Jul 2008 Posts: 1,178 England M MrGuest Serious User
MrGuest Serious User M Joined: Jul 2008 Posts: 1,178 England	Originally Posted By: Aku_Aku My program works like this: Code: main() { while(1) { myfunc(); wait_for(myfunc); wait(1); } } void myfunc() { do some writes into the file } Because there are a lot of activity in my program i am afraid the queue with functions waiting processing will increased seconds by seconds. in this case i'd just call the function from itself Code: void myfunc(){ //do stuff file writing wait(1); myfunc(); } void main(){ myfunc(); } hope this helps

Re: proper usage of loop wait(1) [Re: MrGuest] #340455 09/04/10 14:23 09/04/10 14:23
Joined: Sep 2009 Posts: 1,034 Budapest Aku_Aku OP Serious User
Aku_Aku OP Serious User Joined: Sep 2009 Posts: 1,034 Budapest	OK, i can see, i have to give a better picture. For the sake of simplicity i made a real tiny example. Here is what is closer to the real one: Code: main() { myent=ent_create(...); myent.event=whatever; } void whatever() { while(1) { myfunc(); wait_for(myfunc); wait(1); } } void myfunc() { do some writes into the file }

Re: proper usage of loop wait(1) [Re: Aku_Aku] #340460 09/04/10 14:49 09/04/10 14:49
Joined: Oct 2009 Posts: 149 Germany M muffel Member
muffel Member M Joined: Oct 2009 Posts: 149 Germany	if there is no wait in your myfunc-function, there is no Usage for the Wait_for. My English is to bad to explain it Click to reveal.. A test Code showing the behaviour of wait Code: function fuu() { printf("2 in fuu"); wait(1); printf("3 in fuu after wait"); } function main() { level_load(""); printf("1 before fuu"); fuu(); printf("4 after fuu"); } The output with wait is Code: 1 before fuu 2 in fuu 4 after fuu 3 in fuu after wait The output if wait is commented out Code: 1 before fuu 2 in fuu 3 in fuu after wait 4 after fuu The solution of Mr.Guest to make it recursive is very bad. Using an recursive solution for an endless loop fills the stack fast resulting that the program/system crashes Code: main() { myent=ent_create(...); myent.event=whatever; } void whatever() { while(1) { myfunc(); wait(1); } } void myfunc() { do some writes into the file using no wait } this will be OK if you don't use a wait in myfunc EDIT: Why do you start an endless lopp inside an event?? Each call of the event results to one more endless loop muffel Last edited by muffel; 09/04/10 14:50.

Re: proper usage of loop wait(1) [Re: muffel] #340537 09/05/10 12:28 09/05/10 12:28
Joined: Sep 2009 Posts: 1,034 Budapest Aku_Aku OP Serious User
Aku_Aku OP Serious User Joined: Sep 2009 Posts: 1,034 Budapest	Quote: if there is no wait in your myfunc-function, there is no Usage for the Wait_for. Are you sure?

Re: proper usage of loop wait(1) [Re: Aku_Aku] #340541 09/05/10 13:02 09/05/10 13:02
Joined: Feb 2008 Posts: 3,232 Australia EvilSOB Expert
EvilSOB Expert Joined: Feb 2008 Posts: 3,232 Australia	Originally Posted By: Aku_Aku [quote]if there is no wait in your myfunc-function, there is no Usage for the Wait_for.[quote] Are you sure? . Most definately... "wait_for" is not an actual function, it is a macro. It gets replaced by "while( proc_status(function) ) wait(1);" And proc_status only pays attention to functions that have executed at least one "wait". "There is no fate but what WE make." - CEO Cyberdyne Systems Corp. A8.30.5 Commercial

Re: proper usage of loop wait(1) [Re: EvilSOB] #340544 09/05/10 13:50 09/05/10 13:50
Joined: Sep 2009 Posts: 1,034 Budapest Aku_Aku OP Serious User
Aku_Aku OP Serious User Joined: Sep 2009 Posts: 1,034 Budapest	Thanks for Muffel and you. Based on this information i will review my code.