[Rd] About " Error: C stack usage is too close to the limit"

[Simon Urbanek]

On May 19, 2009, at 4:30 AM, goon83 wrote:

> Hi everyone!
>   I meet one problem when embedding R in C code, when I run the the  
> R code in one child thread ,
>   it always print error info:
>    Error: C stack usage is too close to the limit
>
>   I also try to set R_CStackLimit = (uintptr_t)-1 to disable the C  
> stack check as the R-exts doc say,
>   but it still does not work, the error info still exist.
>

That is the way to do it (and other project use it successfully) - the  
fact that it doesn't work means that you probably do it at the wrong  
place (you must set it *after* Rf_initialize_R).

Cheers,
Simon


>   Besides it is interesting that if i put the R code in the main  
> thread(don't create any thread), it work,  and the E-exts doc say  
> that  "Embedded R is designed to be run in the main thread, and all  
> the testing is done in that context." so i wonder is it that  
> Embedded R can not run in the child thread ?
>
>   so, can anybody give some help or suggestion about this problem,
>   any response will be appreciated, tks in advance.
>
> ***********************
> Bin Dong
> BUAA, Beijing PR China
> goon83 at 126.com
> ***********************
>
>   ps: my code, system info and error information list behand
>
>   -----------------------------
>   1, my example code lists here:
>   -----------------------------
>   #include ....
>
>   void *ts_thread(){
>         SEXP e, tmp;
>         int  hadError;
>         int argc = 0;
>         char *argv[1];
>         ParseStatus status;
>
>         init_R(argc, argv);
>
>        PROTECT(tmp = mkString("{print(lh)}"));
>        PROTECT(e = R_ParseVector(tmp, 1, &status, R_NilValue));
>        PrintValue(e);
>        R_tryEval(VECTOR_ELT(e,0), R_GlobalEnv, &hadError);
>
>       UNPROTECT(2);
>       end_R();
> }
>
> int main(int argc, char *argv[]){
>    pthread_t th1;
>    int iret1;
>
>    iret1 = pthread_create(&th1, NULL, ts_thread,NULL);
>    pthread_join(th1, NULL);
>    printf("Thread 1 return:%d\n", iret1);
>
>    return 0;
> }
> -----------------------------------
> 2, My os and compiler is:
> -----------------------------------
> Linux debian 2.6.26-1-686 #1 SMP Sat Jan 10 18:29:31 UTC 2009 i686  
> GNU/Linux
> gcc version 4.3.2 (Debian 4.3.2-1.1)
>
> -----------------------------------
> 3, the error info:
> ------------------------------------
> goon at debian:~/library/R-source/R-2.9.0/tests/Embedding$ ./Rar
> Error: C stack usage is too close to the limit
> Error: C stack usage is too close to the limit
>
> R version 2.7.1 (2008-06-23)
> Copyright (C) 2008 The R Foundation for Statistical Computing
> ISBN 3-900051-07-0
>
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under certain conditions.
> Type 'license()' or 'licence()' for distribution details.
>
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>
> Type 'demo()' for some demos, 'help()' for on-line help, or
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> Type 'q()' to quit R.
>
> expression({
>    print(lh)
> })
> Error: C stack usage is too close to the limit
> Thread 1 return:0
> ------------------------------------------
>
>
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>
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