def test_find_with_struct_using_double(shmem):
shmem = managed_shared_memory(open_or_create, 'MySharedMemory', 1024)
original_struct = create_struct_with_double_in_shared_memory(shmem, unique_instance)
original_struct.value = 1.5
find_struct = shmem.find(struct_with_double, unique_instance)
assert find_struct.value == 1.5
original_struct.value = 2.5
assert find_struct.value == 2.5
def test_exports_buffer_interface():
import numpy as np
shmem = managed_shared_memory(open_or_create, 'MySharedMemory', 1024)
s = create_struct_with_offset_ptr_in_shared_memory(shmem, 'object name', 8)
buf = s.ptr.asbuffer(8)
arr = np.frombuffer(buf, dtype=np.float64)
arr[0] = 42.0
assert np.frombuffer(buf, dtype=np.float64)[0] == 42.0
def test_constructor_open_only():
with pytest.raises(RuntimeError):
managed_shared_memory(open_only, 'MySharedMemory')
managed_shared_memory(create_only, 'MySharedMemory', 1024)
managed_shared_memory(open_only, 'MySharedMemory')
def test_constructor_open_or_create():
managed_shared_memory(open_or_create, 'MySharedMemory', 1024)
managed_shared_memory(open_or_create, 'MySharedMemory', 1024)
def shmem():
from pyboost_ipc import managed_shared_memory, open_or_create
return managed_shared_memory(open_or_create, 'MySharedMemory', 8192)
