| Standards / Extensions | C or C++ | Dependencies |
|---|---|---|
Single UNIX Specification, Version 3 |
both | z/OS V1R9 |
#define _UNIX03_THREADS
#include <pthread.h>
int pthread_attr_getstackaddr(const pthread_attr_t *__restrict__ attr,
void ** __restrict__ addr); The pthread_attr_getstackaddr() function gets the stackaddr attribute from attr and stores it into addr. The stackaddr attribute holds the storage location of the created thread's initial stack segment.
attr is a pointer to a thread attribute object initialized by pthread_attr_init().
If successful, pthread_attr_getstackaddr() returns 0; otherwise it returns an error number.
⁄* CELEBP64 *⁄
⁄* Example using SUSv3 pthread_attr_getstackaddr() interface *⁄
#define _UNIX03_THREADS 1
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <limits.h>
#include <errno.h>
int main(void)
{
pthread_attr_t attr;
int rc;
void *stackaddr;
void *mystack;
if (pthread_attr_init(&attr) == -1) {
perror("error in pthread_attr_init");
exit(1);
}
⁄* Get a big enough stack and align it on 4K boundary. *⁄
mystack = malloc(PTHREAD_STACK_MIN * 2);
if (mystack != NULL) {
printf("Using PTHREAD_STACK_MIN to align stackaddr %x.\n", mystack);
mystack = (void *)((((long)mystack + (PTHREAD_STACK_MIN - 1)) ⁄
PTHREAD_STACK_MIN) * PTHREAD_STACK_MIN);
} else {
perror("Unable to acquire storage.");
exit(2);
}
printf("Setting stackaddr to %x\n", mystack);
rc = pthread_attr_setstackaddr(&attr, mystack);
if (rc != 0) {
printf("pthread_attr_setstackaddr returned: %d\n", rc);
printf("Error: %d, Errno_Jr: %08x\n", errno, __errno2());
exit(3);
} else {
printf("Set stackaddr to %x\n", mystack);
}
rc = pthread_attr_getstackaddr(&attr, &stackaddr);
if (rc != 0) {
printf("pthread_attr_getstackaddr returned: %d\n", rc);
printf("Error: %d, Errno_Jr: %08x\n", errno, __errno2());
exit(4);
} else {
printf("Retrieved stackaddr is %x\n", stackaddr);
}
rc = pthread_attr_destroy(&attr);
if (rc != 0) {
perror("error in pthread_attr_destroy");
printf("Returned: %d, Error: %d\n", rc, errno);
printf("Errno_Jr: %x\n", __errno2());
exit(5);
}
exit(0);
}