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+/*------------------------------------------------------------------------------------------------*/
+/* UNICENS V2.1.0-3491 */
+/* Copyright (c) 2017 Microchip Technology Germany II GmbH & Co. KG. */
+/* */
+/* This program is free software: you can redistribute it and/or modify */
+/* it under the terms of the GNU General Public License as published by */
+/* the Free Software Foundation, either version 2 of the License, or */
+/* (at your option) any later version. */
+/* */
+/* This program is distributed in the hope that it will be useful, */
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
+/* GNU General Public License for more details. */
+/* */
+/* You should have received a copy of the GNU General Public License */
+/* along with this program. If not, see <http://www.gnu.org/licenses/>. */
+/* */
+/* You may also obtain this software under a propriety license from Microchip. */
+/* Please contact Microchip for further information. */
+/*------------------------------------------------------------------------------------------------*/
+
+/*!
+ * \file
+ * \brief Internal header file of the observer library module. The module consists of the two
+ * classes CSubject and CObserver.
+ *
+ * \cond UCS_INTERNAL_DOC
+ * \addtogroup G_OBS
+ * @{
+ */
+
+#ifndef UCS_OBS_H
+#define UCS_OBS_H
+
+/*------------------------------------------------------------------------------------------------*/
+/* Includes */
+/*------------------------------------------------------------------------------------------------*/
+#include "ucs_types_cfg.h"
+#include "ucs_dl.h"
+#include "ucs_ret_pb.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*------------------------------------------------------------------------------------------------*/
+/* Type definitions */
+/*------------------------------------------------------------------------------------------------*/
+/*! \brief Function signature used for callback functions which notifies the observers.
+ * \param self Instance pointer
+ * \param data_ptr Reference to optional data
+ */
+typedef void (*Obs_UpdateCb_t)(void *self, void *data_ptr);
+
+/*! \brief Function signature used for callback functions which notifies the single-observers.
+ * \param self Instance pointer
+ * \param data_ptr Reference to optional data
+ */
+typedef void (*Sobs_UpdateCb_t)(void *self, void *data_ptr);
+
+/*------------------------------------------------------------------------------------------------*/
+/* Enumerators */
+/*------------------------------------------------------------------------------------------------*/
+/*! \brief Standard return values of the subject class. */
+typedef enum Sub_Ret_
+{
+ SUB_OK, /*!< \brief No error */
+ SUB_DELAYED, /*!< \brief Operation is queued since notification is still active */
+ SUB_ALREADY_ADDED, /*!< \brief Observer already added */
+ SUB_UNKNOWN_OBSERVER, /*!< \brief Unknown observer */
+ SUB_INVALID_OPERATION /*!< \brief Invalid operation */
+
+} Sub_Ret_t;
+
+/*! \brief Standard return values of the single-subject class. */
+typedef enum Ssub_Ret_
+{
+ SSUB_OK, /*!< \brief No error */
+ SSUB_ALREADY_ADDED, /*!< \brief Observer already added */
+ SSUB_UNKNOWN_OBSERVER /*!< \brief Unknown observer */
+
+} Ssub_Ret_t;
+
+/*------------------------------------------------------------------------------------------------*/
+/* Structures */
+/*------------------------------------------------------------------------------------------------*/
+/*! \brief Class structure of observers which are notified by subjects. */
+typedef struct CObserver_
+{
+ CDlNode node; /*!< \brief Node element to be able to add observer to list */
+ void *inst_ptr; /*!< \brief Reference to instance used by update_fptr() */
+ Obs_UpdateCb_t update_fptr; /*!< \brief Callback function to update the observer */
+ bool valid; /*!< \brief Used for queued remove operation */
+
+} CObserver;
+
+/*! \brief Class structure of subjects. */
+typedef struct CSubject_
+{
+ CDlList list; /*!< \brief Doubly linked list to manage observers */
+ CDlList add_list; /*!< \brief List to manage delayed add operations */
+ uint8_t num_observers; /*!< \brief Number of added observers */
+ bool notify; /*!< \brief Signals that the notification is in progress */
+ bool changed; /*!< \brief Signals that an add- or a remove-operation
+ has been queued */
+ void *ucs_user_ptr; /*!< \brief User reference that needs to be passed in every callback function */
+
+} CSubject;
+
+/*! \brief Class structure of a single-observer which is notified by a single-subject. */
+typedef struct CSingleObserver_
+{
+ void *inst_ptr; /*!< \brief Reference to instance used by update_fptr() */
+ Obs_UpdateCb_t update_fptr; /*!< \brief Callback function to update the observer */
+
+} CSingleObserver;
+
+/*! \brief Class structure of a single-subject. */
+typedef struct CSingleSubject_
+{
+ CSingleObserver *observer_ptr; /*!< \brief Reference to the assigned single-observer */
+ void *ucs_user_ptr; /*!< \brief User reference that needs to be passed in every callback function */
+ uint32_t user_mask; /*!< \brief Current user mask to the single observer */
+
+} CSingleSubject;
+
+/*! \brief Class structure of masked observers which are notified by subjects. */
+typedef struct CMaskedObserver_
+{
+ CObserver parent; /*!< \brief Parent class instance */
+ uint32_t notification_mask; /*!< \brief Notification bitmask */
+
+} CMaskedObserver;
+
+/*------------------------------------------------------------------------------------------------*/
+/* Prototypes of class CSubject */
+/*------------------------------------------------------------------------------------------------*/
+extern void Sub_Ctor(CSubject *self, void *ucs_user_ptr);
+extern Sub_Ret_t Sub_AddObserver(CSubject *self, CObserver *obs_ptr);
+extern Sub_Ret_t Sub_RemoveObserver(CSubject *self, CObserver *obs_ptr);
+extern void Sub_Notify(CSubject *self, void *data_ptr);
+extern uint8_t Sub_GetNumObservers(CSubject *self);
+extern Sub_Ret_t Sub_SwitchObservers(CSubject *sub_target, CSubject *sub_source);
+
+/*------------------------------------------------------------------------------------------------*/
+/* Prototypes of class CObserver */
+/*------------------------------------------------------------------------------------------------*/
+extern void Obs_Ctor(CObserver *self, void *inst_ptr, Obs_UpdateCb_t update_fptr);
+
+/*------------------------------------------------------------------------------------------------*/
+/* Prototypes of class CSingleSubject */
+/*------------------------------------------------------------------------------------------------*/
+extern void Ssub_Ctor(CSingleSubject *self, void *ucs_user_ptr);
+extern Ssub_Ret_t Ssub_AddObserver(CSingleSubject *self, CSingleObserver *obs_ptr);
+extern void Ssub_RemoveObserver(CSingleSubject *self);
+extern void Ssub_Notify(CSingleSubject *self, void *data_ptr, bool auto_remove);
+
+/*------------------------------------------------------------------------------------------------*/
+/* Prototypes of class CSingleObserver */
+/*------------------------------------------------------------------------------------------------*/
+extern void Sobs_Ctor(CSingleObserver *self, void *inst_ptr, Sobs_UpdateCb_t update_fptr);
+
+/*------------------------------------------------------------------------------------------------*/
+/* Prototypes of class CMaskedObserver */
+/*------------------------------------------------------------------------------------------------*/
+extern void Mobs_Ctor(CMaskedObserver *self,
+ void *inst_ptr,
+ uint32_t notification_mask,
+ Obs_UpdateCb_t update_fptr);
+extern void Mobs_SetNotificationMask(CMaskedObserver *self, uint32_t mask);
+extern uint32_t Mobs_GetNotificationMask(CMaskedObserver *self);
+
+/*------------------------------------------------------------------------------------------------*/
+/* Additional prototypes of class CSubject used in combination with CMaskedObserver */
+/*------------------------------------------------------------------------------------------------*/
+extern Sub_Ret_t Msub_AddObserver(CSubject *self, CMaskedObserver *obs_ptr);
+extern Sub_Ret_t Msub_RemoveObserver(CSubject *self, CMaskedObserver *obs_ptr);
+extern void Msub_Notify(CSubject *self, void *data_ptr, uint32_t notification_mask);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* #ifndef UCS_OBS_H */
+
+/*!
+ * @}
+ * \endcond
+ */
+
+/*------------------------------------------------------------------------------------------------*/
+/* End of file */
+/*------------------------------------------------------------------------------------------------*/
+