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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
'''Client for the unit test of QSharedMemory'''
import sys
from PySide6.QtCore import QSharedMemory
def read_string(shared_memory):
"""Read out a null-terminated string from the QSharedMemory"""
mv = memoryview(shared_memory.constData())
result = ''
for i in range(shared_memory.size()):
char = mv[i]
if not char:
break
result += chr(char)
return result
if __name__ == '__main__':
if len(sys.argv) != 2:
print('Pass segment name', file=sys.stderr)
sys.exit(-1)
shared_memory = QSharedMemory(sys.argv[1])
if not shared_memory.attach(QSharedMemory.ReadOnly):
raise SystemError(f'attach to "{name}" failed')
if not shared_memory.lock():
raise SystemError(f'lock of "{name}" failed')
data = read_string(shared_memory)
shared_memory.unlock()
shared_memory.detach()
sys.stdout.write(data)
sys.exit(0)
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