DESCRIPTION
The pthread_attr_get_np function is used to get existent thread’s attributes. Most fields of
.Vt pthread_attr_t structure are exact values of attributes provided at thread creation time (as parameter to pthread_create(3) function), except for the stack address. Value returned as dst is supposed to be used in conjunction with pthread_attr_get* functions to retrieve individual values from
.Vt pthread_attr_t structure. Parameter dst should point to allocated memory area big enough to fit this structure.
It is HIGHLY RECOMMENDED to use pthread_attr_init(3) function to allocate attribute storage.
IMPLEMENTATION NOTES
The pthread_attr_get_np function will always return a pointer to the thread’s real stack address, regardless of its value in the original attributes structure.
RETURN VALUES
If successful, pthread_attr_get_np function returns 0. Otherwise, an error number is returned to indicate the error.
EXAMPLES
size_t
my_thread_stack_size(pthread_t pid)
{
pthread_attr_t attr;
size_t size;
pthread_attr_init(&attr);
pthread_attr_get_np(pid, &attr);
pthread_attr_getstacksize(&attr, &size);
pthread_attr_destroy(&attr);
return(size);
}
ERRORS
The pthread_attr_get_np function will fail if:
