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Diffstat (limited to 'metis/ccnx/forwarder/metis/messenger/metis_Missive.h')
-rw-r--r-- | metis/ccnx/forwarder/metis/messenger/metis_Missive.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/metis/ccnx/forwarder/metis/messenger/metis_Missive.h b/metis/ccnx/forwarder/metis/messenger/metis_Missive.h new file mode 100644 index 00000000..8f3b4906 --- /dev/null +++ b/metis/ccnx/forwarder/metis/messenger/metis_Missive.h @@ -0,0 +1,112 @@ +/* + * Copyright (c) 2017 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/** + * @file metis_Missive.h + * @brief A Missive is a status message sent over a broadcast channel inside Metis + * + * Recipients use {@link metisMessenger_Register} to receive missives. They are + * broadcast to all recipients. + * + */ +#ifndef Metis_metis_missive_h +#define Metis_metis_missive_h + +#include <ccnx/forwarder/metis/messenger/metis_MissiveType.h> + +struct metis_missive; +typedef struct metis_missive MetisMissive; + +/** + * Creates a Missive and sets the reference count to 1 + * + * A Missive may be sent to listeners of the MetisMessenger to inform them of events on a connection id. + * + * @param [in] MetisMissiveType The event type + * @param [in] connectionid The relevant conneciton id + * + * @return non-null A message + * @retrun null An error + * + * Example: + * @code + * <#example#> + * @endcode + */ +MetisMissive *metisMissive_Create(MetisMissiveType missiveType, unsigned connectionid); + +/** + * Acquire a reference counted copy + * + * Increases the reference count by 1 and returns the original object. + * + * @param [in] missive An allocated missive + * + * @return non-null The original missive with increased reference count + * + * Example: + * @code + * <#example#> + * @endcode + */ +MetisMissive *metisMissive_Acquire(const MetisMissive *missive); + +/** + * Releases a reference counted copy. + * + * If it is the last reference, the missive is freed. + * + * @param [in,out] missivePtr Double pointer to a missive, will be nulled. + * + * Example: + * @code + * <#example#> + * @endcode + */ +void metisMissive_Release(MetisMissive **missivePtr); + +/** + * Returns the type of the missive + * + * Returns the type of event the missive represents + * + * @param [in] missive An allocated missive + * + * @return MetisMissiveType The event type + * + * Example: + * @code + * <#example#> + * @endcode + */ +MetisMissiveType metisMissive_GetType(const MetisMissive *missive); + +/** + * Returns the connection ID of the missive + * + * An event is usually associated with a connection id (i.e. the I/O channel + * that originaged the event). + * + * @param [in] missive An allocated missive + * + * @return number The relevant connection id. + * + * Example: + * @code + * <#example#> + * @endcode + */ +unsigned metisMissive_GetConnectionId(const MetisMissive *missive); +#endif // Metis_metis_missive_h |