Prerequisite : Multithreading
Syntax :
// to get size of stack int pthread_attr_getstacksize(const pthread_attr_t* restrict attr, size_t* restrict stacksize); // to set size of stack int pthread_attr_setstacksize(pthread_attr_t* attr, size_t stacksize); |
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pthread_attr_getstacksize() :
It is use for get threads stack size. The stacksize attribute gives the minimum stack size allocated to threads stack. When successfully run then it gives 0 otherwise gives any value.
First argument – It takes pthread attribute.
Second argument – It takes a variable and give the size of the thread attribute.
pthread_attr_setstacksize() :
It is use for set new threads stack size. The stacksize attribute gives the minimum stack size allocated to threads stack. When successfully run then it gives 0 otherwise if error gives any value.
First argument – It takes pthread attribute.
Second argument – It takes the size of new stack (In bytes)
#include <stdio.h> #include <stdlib.h> #include <pthread.h> int main() { // for takes the size of threads stack size_t stksize; // attribute declaration pthread_attr_t atr; // it gets the threads stack size and give // value in stksize variable pthread_attr_getstacksize(&atr, &stksize); // print the current threads stack size printf("Current stack size - > %d
", stksize); // then set the new threads stack size pthread_attr_setstacksize(&atr, 320000034); pthread_attr_getstacksize(&atr, &stksize); // print the new stack size printf("New stack size-> %d
", stksize); return 0; } |
Output :
Current stack size - > 4196464 New stack size-> 320000034
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