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#! /usr/bin/env python3
"""
# ThreadSafeConnect.py : stress thread safeness of
# SCardConnect/SCardDisconnect
# Copyright (C) 2010 Ludovic Rousseau
"""
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, see <http://www.gnu.org/licenses/>.
import threading
from smartcard.pcsc.PCSCExceptions import (
BaseSCardException,
EstablishContextException,
ListReadersException,
ReleaseContextException,
)
from smartcard.scard import (
SCARD_LEAVE_CARD,
SCARD_PROTOCOL_ANY,
SCARD_S_SUCCESS,
SCARD_SCOPE_USER,
SCARD_SHARE_SHARED,
SCardConnect,
SCardDisconnect,
SCardEstablishContext,
SCardListReaders,
SCardReleaseContext,
)
MAX_THREADS = 10
MAX_ITER = 10
def stress(*args):
"""
stress method
"""
thread = args[0]
print("Starting thread:", thread)
hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER)
if hresult != SCARD_S_SUCCESS:
raise EstablishContextException(hresult)
hresult, readers = SCardListReaders(hcontext, [])
if hresult != SCARD_S_SUCCESS:
raise ListReadersException(hresult)
for j in range(MAX_ITER):
# Connect in SCARD_SHARE_SHARED mode
hresult, hcard, _dwActiveProtocol = SCardConnect(
hcontext, readers[0], SCARD_SHARE_SHARED, SCARD_PROTOCOL_ANY
)
if hresult != SCARD_S_SUCCESS:
raise BaseSCardException(hresult)
log = f"{thread}:{j}"
print(log, end=" ")
hresult = SCardDisconnect(hcard, SCARD_LEAVE_CARD)
if hresult != SCARD_S_SUCCESS:
raise BaseSCardException(hresult)
print()
hresult = SCardReleaseContext(hcontext)
if hresult != SCARD_S_SUCCESS:
raise ReleaseContextException(hresult)
print("Exiting thread:", thread)
def main():
"""
main
"""
threads = []
for i in range(MAX_THREADS):
thread = threading.Thread(target=stress, args=[i])
threads.append(thread)
thread.start()
for thread in threads:
print("joining:", thread.name, end=" ")
thread.join()
print("joined:", thread.name)
print("Exiting main")
if __name__ == "__main__":
main()
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