def test_find_different_struct_types(shmem):
create_struct_with_offset_ptr_in_shared_memory(shmem, unique_instance, 10)
create_struct_with_double_in_shared_memory(shmem, unique_instance)
f1 = shmem.find(struct_with_offset_ptr, unique_instance)
f2 = shmem.find(struct_with_double, unique_instance)
assert type(f2) == struct_with_double
assert type(f1) == struct_with_offset_ptr
def test_find_with_struct_using_pointer(shmem):
original_struct = create_struct_with_offset_ptr_in_shared_memory(shmem, unique_instance, 10)
original_arr = np.frombuffer(original_struct.ptr.asbuffer(8), dtype=np.float64)
original_arr.fill(-1.0)
find_struct = shmem.find(struct_with_offset_ptr, unique_instance)
find_arr = np.frombuffer(find_struct.ptr.asbuffer(8), dtype=np.float64)
assert find_arr[0] == original_arr[0] == -1.0
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
