Get and set the stack size of thread properties in C language

To get and set the stack size of a thread attribute in C, we use the following thread attribute:

pthread_attr_getstacksize()

is used to get the thread Stack size. The stacksize attribute gives the minimum stack size allocated to the thread stack. Returns 0 if run successfully, otherwise returns any value.

It accepts two parameters:

pthread_attr_getstacksize(pthread_attr_t *attr, size_t *stacksize)

• The first parameter is the pthread attribute.
• The second parameter is the size of the thread attribute.

pthread_attr_setstacksize()

is used to set the new thread stack size. The stacksize attribute gives the minimum stack size allocated to the thread stack. Returns 0 if run successfully, otherwise returns any value.

It accepts two parameters:

pthread_attr_setstacksize(pthread_attr_t *attr, size_t *stacksize)

• The first parameter is the pthread attribute.
• The second parameter is the new stack size in bytes.

Algorithm

Begin
   Declare stack size and declare pthread attribute a.
   Gets the current stacksize by pthread_attr_getstacksize() and print it.
   Set the new stack size by pthread_attr_setstacksize() and get the stack size pthread_attr_getstacksize() and print it.
End

Sample code

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

int main() {
   size_t stacksize;
   pthread_attr_t a;
   pthread_attr_getstacksize(&a, &stacksize);
   printf("Current stack size = %d</p><p>", stacksize);
   pthread_attr_setstacksize(&a, 67626);
   pthread_attr_getstacksize(&a, &stacksize);
   printf("New stack size= %d</p><p>", stacksize);
   return 0;
}

Output

Current stack size = 50
New stack size= 67626

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