def parallel_test():
"""Test that devices can be found and opened in parallel"""
device_list = DAPAccess.get_connected_devices()
id_list = [device.get_unique_id() for device in device_list]
id_list.sort()
if len(id_list) < 2:
print("Need at least 2 boards to run the parallel test")
exit(-1)
# Goal of this file is to test that:
# -The process of listing available boards does not interfere
# with other processes enumerating, opening, or using boards
# -Opening and using a board does not interfere with another process
# processes which is enumerating, opening, or using boards as
# long as that is not the current board
print("Listing board from multiple threads at the same time")
args_list = [(id_list,) for _ in range(5)]
run_in_parallel(list_boards, args_list)
print("Listing board from multiple processes at the same time")
run_in_processes(list_boards, args_list)
print("Opening same board from multiple threads at the same time")
device = DAPAccess.get_device(id_list[0])
device.open()
open_already_opened(id_list[0])
args_list = [(id_list[0],) for _ in range(5)]
run_in_parallel(open_already_opened, args_list)
device.close()
print("Opening same board from multiple processes at the same time")
device = DAPAccess.get_device(id_list[0])
device.open()
open_already_opened(id_list[0])
args_list = [(id_list[0],) for _ in range(5)]
run_in_processes(open_already_opened, args_list)
device.close()
print("Opening different boards from different threads")
args_list = [(board_id,) for board_id in id_list]
run_in_parallel(search_and_lock, args_list)
print("Opening different boards from different processes")
run_in_processes(search_and_lock, args_list)
print("Test passed")
def open_already_opened(board_id):
"""Open a device that is already open to verify it gives an error"""
device = DAPAccess.get_device(board_id)
try:
device.open()
assert False
except DAPAccess.DeviceError:
pass
def search_and_lock(board_id):
"""Repeatedly lock a board with the given ID"""
for _ in range(0, 20):
device = DAPAccess.get_device(board_id)
device.open()
device.close()
with MbedBoard.chooseBoard(board_id=board_id):
pass
