python_cdll_multithread/cdll.py


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#!/usr/bin/python3 -u
import sys;
import time;
from ctypes import *;

testlib = CDLL( "./libpcdlltest.so" );

print( testlib );

testlib.testfunc.restype = c_void_p;
testlib.testfunc2.restype = c_void_p;
testlib.testfunc3.restype = c_char_p;
testlib.cleanup_buffer.restype = c_void_p;

print( "Executing first test function (simple message from C code)" );

testlib.testfunc();

print( "Executing test function 2 (pass python value to it)" );

pvar = create_string_buffer( bytes("test message", "utf8") );
testlib.testfunc2( pvar );
del pvar;

print( "Executing test function 3 (return value from C code)" );

test_value = testlib.testfunc3().decode("utf8");
print( f"Returned value: {test_value}" );
del test_value;

print( "Executing buffer cleanup functiion" );

testlib.cleanup_buffer();

print( "Starting C thread" );

testlib.threadstarter();

print( "Printing garbage from python code" );

for pcount in range(0, 40):
  print( f"Count is now in python {pcount}" );
  time.sleep( 1 );

print( "All tests done" );

del testlib;

sys.exit( 0 );