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Diffstat (limited to 'ucs2-lib/inc/ucs_obs.h')
| -rw-r--r-- | ucs2-lib/inc/ucs_obs.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/ucs2-lib/inc/ucs_obs.h b/ucs2-lib/inc/ucs_obs.h new file mode 100644 index 0000000..7ef2d83 --- /dev/null +++ b/ucs2-lib/inc/ucs_obs.h @@ -0,0 +1,195 @@ +/*------------------------------------------------------------------------------------------------*/ +/* 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 */ +/*------------------------------------------------------------------------------------------------*/ + |