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Add dds_get_guid to get the GUID of a local entity

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This is merely a more convenient way of obtaining it: otherwise one has
subscribe to the correct built-in topic, read the sample corresponding
to the entity's instance handle and get the "key" field.  That's a bit
of a detour to get the network-wide unique identifier.

Signed-off-by: Erik Boasson <eb@ilities.com>
This commit is contained in:
Erik Boasson 2020-04-09 13:49:10 +02:00 • committed by eboasson
parent b2cf6921da
commit 45c0f432a9
3 changed files with 73 additions and 0 deletions
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22
src/core/ddsc/tests/entity_api.c
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@ -255,6 +255,28 @@ CU_Test(ddsc_entity, status, .init = create_entity, .fini = delete_entity)
CU_ASSERT_EQUAL_FATAL(status1, DDS_RETCODE_OK);
}
CU_Test(ddsc_entity, guid, .init = create_entity, .fini = delete_entity)
{
dds_return_t status;
dds_guid_t guid, zero;
memset(&zero, 0, sizeof(zero));
/* Don't check actual handle contents. That's a job
* for the specific entity children, not for the generic part. */
/* Check getting Handle with bad parameters. */
status = dds_get_guid (0, NULL);
CU_ASSERT_EQUAL_FATAL(status, DDS_RETCODE_BAD_PARAMETER);
status = dds_get_guid (entity, NULL);
CU_ASSERT_EQUAL_FATAL(status, DDS_RETCODE_BAD_PARAMETER);
status = dds_get_guid (0, &guid);
CU_ASSERT_EQUAL_FATAL(status, DDS_RETCODE_BAD_PARAMETER);
/* Get Instance Handle, which should not be 0 for a participant. */
status = dds_get_guid (entity, &guid);
CU_ASSERT_EQUAL_FATAL(status, DDS_RETCODE_OK);
CU_ASSERT_FATAL(memcmp(&guid, &zero, sizeof(guid)) != 0);
}
CU_Test(ddsc_entity, instance_handle, .init = create_entity, .fini = delete_entity)
{