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/*
* Copyright (c) 2017-2019 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 loop.h
* \brief Face manager main loop
*/
#ifndef FACEMGR_LOOP_H
#define FACEMGR_LOOP_H
/* fd & timer callbacks */
typedef int (*fd_callback_t)(void * owner, int fd, void * data);
typedef struct {
int fd;
void *owner;
fd_callback_t callback;
//int (*callback)(void * owner, int fd, void * data);
void *data;
} fd_callback_data_t;
/* loop */
typedef struct loop_s loop_t;
/* Global loop to be used in single threaded applications */
extern loop_t * MAIN_LOOP;
/**
* \brief Creates a main loop
* \return Pointer to the newly created loop, or NULL in case of error
*/
loop_t * loop_create();
/**
* \brief Releases a loop instance and frees all associated memory
* \param [in] loop - Pointer to the loop instance to free
*/
void loop_free(loop_t * loop);
/**
* \brief Runs the loop instance to process events
* \param [in] loop - Pointer to the loop instance
* \return 0 if successful, -1 otherwise
*/
int loop_dispatch(loop_t * loop);
/**
* \brief Terminates the dispatching of events
* \param [in] loop - Pointer to the loop instance
*/
int loop_undispatch(loop_t * loop);
/**
* \brief Breaks out of the loop
* \param [in] loop - Pointer to the loop instance
*/
void loop_break(loop_t * loop);
/**
* \brief Registers a new file descriptor to the event loop
* \param [in] fd - File descriptor to register
* \param [in] callback_owner - Pointer to the owner of the callack (first
* parameter of callback function)
* \param [in] callback - Callback function
* \param [in] callback_data - User data to pass alongside callback invocation
* \return 0 in case of success, -1 otherwise
*/
int
loop_register_fd(loop_t * loop, int fd, void * callback_owner,
fd_callback_t callback, void * callback_data);
/**
* \brief Unregisters a file descriptor from the event loop
* \param [in] fd - File descriptor to unregister
* \return 0 in case of success, -1 otherwise
*/
int
loop_unregister_fd(loop_t * loop, int fd);
int _loop_register_timer(loop_t * loop, unsigned delay_ms, void * owner,
fd_callback_t callback, void * data);
#define loop_register_timer(loop, delay_ms, owner, callback, data) \
_loop_register_timer(loop, delay_ms, owner, (fd_callback_t) callback, data)
int
loop_unregister_timer(loop_t * loop, int fd);
#endif /* FACEMGR_LOOP_H */
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