run_loop.h

00001 /*
00002  * Copyright (C) 2009 by Matthias Ringwald
00003  *
00004  * Redistribution and use in source and binary forms, with or without
00005  * modification, are permitted provided that the following conditions
00006  * are met:
00007  *
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the copyright holders nor the names of
00014  *    contributors may be used to endorse or promote products derived
00015  *    from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS
00018  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00019  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
00020  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
00021  * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
00022  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
00023  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
00024  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
00025  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00026  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
00027  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00028  * SUCH DAMAGE.
00029  *
00030  */
00031 
00032 /*
00033  *  run_loop.h
00034  *
00035  *  Created by Matthias Ringwald on 6/6/09.
00036  */
00037 
00038 #pragma once
00039 
00040 #include "config.h"
00041 
00042 #include "btstack/linked_list.h"
00043 
00044 #include <stdint.h>
00045 
00046 #ifdef HAVE_TIME
00047 #include <sys/time.h>
00048 #endif
00049 
00050 #if defined __cplusplus
00051 extern "C" {
00052 #endif
00053     
00054 typedef enum {
00055     RUN_LOOP_POSIX = 1,
00056     RUN_LOOP_COCOA,
00057     RUN_LOOP_EMBEDDED
00058 } RUN_LOOP_TYPE;
00059 
00060 typedef struct data_source {
00061     linked_item_t item;
00062     int  fd;                                 // <-- file descriptor to watch or 0
00063     int  (*process)(struct data_source *ds); // <-- do processing
00064 } data_source_t;
00065 
00066 typedef struct timer {
00067     linked_item_t item; 
00068 #ifdef HAVE_TIME
00069     struct timeval timeout;                  // <-- next timeout
00070 #endif
00071 #ifdef HAVE_TICK
00072     uint32_t timeout;                       // timeout in system ticks
00073 #endif
00074     void  (*process)(struct timer *ts);      // <-- do processing
00075 } timer_source_t;
00076 
00077 
00078 // set timer based on current time
00079 void run_loop_set_timer(timer_source_t *a, uint32_t timeout_in_ms);
00080 
00081 // add/remove timer_source
00082 void run_loop_add_timer(timer_source_t *timer); 
00083 int  run_loop_remove_timer(timer_source_t *timer);
00084 
00085 // init must be called before any other run_loop call
00086 void run_loop_init(RUN_LOOP_TYPE type);
00087 
00088 // add/remove data_source
00089 void run_loop_add_data_source(data_source_t *dataSource);
00090 int  run_loop_remove_data_source(data_source_t *dataSource);
00091 
00092 
00093 // execute configured run_loop
00094 void run_loop_execute(void);
00095 
00096 // hack to fix HCI timer handling
00097 #ifdef HAVE_TICK
00098 uint32_t embedded_get_ticks(void);
00099 uint32_t embedded_ticks_for_ms(uint32_t time_in_ms);
00100 #endif
00101 #ifdef EMBEDDED
00102 void     embedded_trigger(void);    
00103 #endif
00104 #if defined __cplusplus
00105 }
00106 #endif
00107