Get the default stack size of new pthread threads.

pthread_attr_getstacksize.py

"""
Get the default stack size of new pthread threads
"""

import ctypes, ctypes.util
libc = ctypes.CDLL(ctypes.util.find_library("c"))

pthread_attr_getstacksize = libc.pthread_attr_getstacksize
pthread_attr_getstacksize.argtypes = [ctypes.c_void_p, ctypes.POINTER(ctypes.c_size_t)]
pthread_attr_getstacksize.restype = ctypes.c_int

pthread_self = libc.pthread_self
pthread_self.restype = ctypes.c_void_p

pthread_attr_init = libc.pthread_attr_init
pthread_attr_init.restype = ctypes.c_int
pthread_attr_init.argtypes = [ctypes.c_void_p]

pthread_attr_destroy = libc.pthread_attr_destroy
pthread_attr_destroy.argtypes = [ctypes.c_void_p]
pthread_attr_destroy.restype = ctypes.c_int

attr = (ctypes.c_char * 1024)()  # buffer with probably sufficient size

if pthread_attr_init(attr):
    raise OSError(ctypes.get_errno())


size = ctypes.c_size_t(0)
status = pthread_attr_getstacksize(
    attr, ctypes.pointer(size)
)
print("Status:", status, ", size:", size.value)

pthread_attr_destroy(attr)