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/*
* Copyright (C) 2014 BlueKitchen GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. Any redistribution, use, or modification is done solely for
* personal benefit and not for any commercial purpose or for
* monetary gain.
*
* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN
* GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Please inquire about commercial licensing options at
* contact@bluekitchen-gmbh.com
*
*/
#define BTSTACK_FILE__ "btstack_run_loop.c"
/*
* run_loop.c
*
* Created by Matthias Ringwald on 6/6/09.
*/
#include "btstack_run_loop.h"
#include "btstack_debug.h"
#include "btstack_config.h"
#include "btstack_util.h"
#include <inttypes.h>
static const btstack_run_loop_t * the_run_loop = NULL;
extern const btstack_run_loop_t btstack_run_loop_embedded;
/*
* Portable implementation of timer and data source management as base for platform specific implementations
*/
// private data (access only by run loop implementations)
btstack_linked_list_t btstack_run_loop_base_timers;
btstack_linked_list_t btstack_run_loop_base_data_sources;
btstack_linked_list_t btstack_run_loop_base_callbacks;
void btstack_run_loop_base_init(void){
btstack_run_loop_base_timers = NULL;
btstack_run_loop_base_data_sources = NULL;
btstack_run_loop_base_callbacks = NULL;
}
void btstack_run_loop_base_add_data_source(btstack_data_source_t * data_source){
btstack_linked_list_add(&btstack_run_loop_base_data_sources, (btstack_linked_item_t *) data_source);
}
bool btstack_run_loop_base_remove_data_source(btstack_data_source_t * data_source){
return btstack_linked_list_remove(&btstack_run_loop_base_data_sources, (btstack_linked_item_t *) data_source);
}
void btstack_run_loop_base_enable_data_source_callbacks(btstack_data_source_t * data_source, uint16_t callback_types){
data_source->flags |= callback_types;
}
void btstack_run_loop_base_disable_data_source_callbacks(btstack_data_source_t * data_source, uint16_t callback_types){
data_source->flags &= ~callback_types;
}
bool btstack_run_loop_base_remove_timer(btstack_timer_source_t * timer){
return btstack_linked_list_remove(&btstack_run_loop_base_timers, (btstack_linked_item_t *) timer);
}
void btstack_run_loop_base_add_timer(btstack_timer_source_t * timer){
btstack_linked_item_t *it;
for (it = (btstack_linked_item_t *) &btstack_run_loop_base_timers; it->next ; it = it->next){
btstack_timer_source_t * next = (btstack_timer_source_t *) it->next;
if (next == timer){
log_error("Timer %p already registered! Please read source code comment.", timer);
//
// Dear BTstack User!
//
// If you hit the assert below, your application code tried to add a timer to the list of
// timers that's already in the timer list, i.e., it's already registered.
//
// As you've probably already modified the timer, just ignoring this might lead to unexpected
// and hard to debug issues. Instead, we decided to raise an assert in this case to help.
//
// Please do a backtrace and check where you register this timer.
// If you just want to restart it you can call btstack_run_loop_timer_remove(..) before restarting the timer.
//
btstack_assert(false);
}
int32_t delta = btstack_time_delta(timer->timeout, next->timeout);
if (delta < 0) break;
}
timer->item.next = it->next;
it->next = (btstack_linked_item_t *) timer;
}
void btstack_run_loop_base_process_timers(uint32_t now){
// process timers, exit when timeout is in the future
while (btstack_run_loop_base_timers) {
btstack_timer_source_t * timer = (btstack_timer_source_t *) btstack_run_loop_base_timers;
int32_t delta = btstack_time_delta(timer->timeout, now);
if (delta > 0) break;
btstack_run_loop_base_remove_timer(timer);
timer->process(timer);
}
}
void btstack_run_loop_base_dump_timer(void){
#ifdef ENABLE_LOG_INFO
btstack_linked_item_t *it;
uint16_t i = 0;
for (it = (btstack_linked_item_t *) btstack_run_loop_base_timers; it ; it = it->next){
btstack_timer_source_t * timer = (btstack_timer_source_t*) it;
log_info("timer %u (%p): timeout %" PRIbtstack_time_t "\n", i, (void *) timer, timer->timeout);
}
#endif
}
/**
* @brief Get time until first timer fires
* @return -1 if no timers, time until next timeout otherwise
*/
int32_t btstack_run_loop_base_get_time_until_timeout(uint32_t now){
if (btstack_run_loop_base_timers == NULL) return -1;
btstack_timer_source_t * timer = (btstack_timer_source_t *) btstack_run_loop_base_timers;
uint32_t list_timeout = timer->timeout;
int32_t delta = btstack_time_delta(list_timeout, now);
if (delta < 0){
delta = 0;
}
return delta;
}
void btstack_run_loop_base_poll_data_sources(void){
// poll data sources
btstack_data_source_t *ds;
btstack_data_source_t *next;
for (ds = (btstack_data_source_t *) btstack_run_loop_base_data_sources; ds != NULL ; ds = next){
next = (btstack_data_source_t *) ds->item.next; // cache pointer to next data_source to allow data source to remove itself
if (ds->flags & DATA_SOURCE_CALLBACK_POLL){
ds->process(ds, DATA_SOURCE_CALLBACK_POLL);
}
}
}
void btstack_run_loop_base_add_callback(btstack_context_callback_registration_t * callback_registration){
btstack_linked_list_add_tail(&btstack_run_loop_base_callbacks, (btstack_linked_item_t *) callback_registration);
}
void btstack_run_loop_base_execute_callbacks(void){
while (1){
btstack_context_callback_registration_t * callback_registration = (btstack_context_callback_registration_t *) btstack_linked_list_pop(&btstack_run_loop_base_callbacks);
if (callback_registration == NULL){
break;
}
(*callback_registration->callback)(callback_registration->context);
}
}
/**
* BTstack Run Loop Implementation, mainly dispatches to port-specific implementation
*/
// main implementation
void btstack_run_loop_set_timer_handler(btstack_timer_source_t * timer, void (*process)(btstack_timer_source_t * _timer)){
timer->process = process;
}
void btstack_run_loop_set_data_source_handler(btstack_data_source_t * data_source, void (*process)(btstack_data_source_t *_data_source, btstack_data_source_callback_type_t callback_type)){
data_source->process = process;
}
void btstack_run_loop_set_data_source_fd(btstack_data_source_t * data_source, int fd){
data_source->source.fd = fd;
}
int btstack_run_loop_get_data_source_fd(btstack_data_source_t * data_source){
return data_source->source.fd;
}
void btstack_run_loop_set_data_source_handle(btstack_data_source_t * data_source, void * handle){
data_source->source.handle = handle;
}
void * btstack_run_loop_get_data_source_handle(btstack_data_source_t * data_source){
return data_source->source.handle;
}
void btstack_run_loop_enable_data_source_callbacks(btstack_data_source_t * data_source, uint16_t callbacks){
btstack_assert(the_run_loop != NULL);
btstack_assert(the_run_loop->enable_data_source_callbacks != NULL);
the_run_loop->enable_data_source_callbacks(data_source, callbacks);
}
void btstack_run_loop_disable_data_source_callbacks(btstack_data_source_t * data_source, uint16_t callbacks){
btstack_assert(the_run_loop != NULL);
btstack_assert(the_run_loop->enable_data_source_callbacks != NULL);
the_run_loop->disable_data_source_callbacks(data_source, callbacks);
}
/**
* Add data_source to run_loop
*/
void btstack_run_loop_add_data_source(btstack_data_source_t * data_source){
btstack_assert(the_run_loop != NULL);
btstack_assert(the_run_loop->enable_data_source_callbacks != NULL);
btstack_assert(data_source->process != NULL);
the_run_loop->add_data_source(data_source);
}
/**
* Remove data_source from run loop
*/
int btstack_run_loop_remove_data_source(btstack_data_source_t * data_source){
btstack_assert(the_run_loop != NULL);
btstack_assert(the_run_loop->disable_data_source_callbacks != NULL);
btstack_assert(data_source->process != NULL);
return the_run_loop->remove_data_source(data_source);
}
void btstack_run_loop_poll_data_sources_from_irq(void){
btstack_assert(the_run_loop != NULL);
btstack_assert(the_run_loop->poll_data_sources_from_irq != NULL);
the_run_loop->poll_data_sources_from_irq();
}
void btstack_run_loop_set_timer(btstack_timer_source_t *timer, uint32_t timeout_in_ms){
btstack_assert(the_run_loop != NULL);
the_run_loop->set_timer(timer, timeout_in_ms);
}
/**
* @brief Set context for this timer
*/
void btstack_run_loop_set_timer_context(btstack_timer_source_t * timer, void * context){
timer->context = context;
}
/**
* @brief Get context for this timer
*/
void * btstack_run_loop_get_timer_context(btstack_timer_source_t * timer){
return timer->context;
}
/**
* Add timer to run_loop (keep list sorted)
*/
void btstack_run_loop_add_timer(btstack_timer_source_t * timer){
btstack_assert(the_run_loop != NULL);
btstack_assert(timer->process != NULL);
the_run_loop->add_timer(timer);
}
/**
* Remove timer from run loop
*/
int btstack_run_loop_remove_timer(btstack_timer_source_t * timer){
btstack_assert(the_run_loop != NULL);
return the_run_loop->remove_timer(timer);
}
/**
* @brief Get current time in ms
*/
uint32_t btstack_run_loop_get_time_ms(void){
btstack_assert(the_run_loop != NULL);
return the_run_loop->get_time_ms();
}
void btstack_run_loop_timer_dump(void){
btstack_assert(the_run_loop != NULL);
the_run_loop->dump_timer();
}
/**
* Execute run_loop
*/
void btstack_run_loop_execute(void){
btstack_assert(the_run_loop != NULL);
the_run_loop->execute();
}
void btstack_run_loop_trigger_exit(void){
btstack_assert(the_run_loop != NULL);
btstack_assert(the_run_loop->trigger_exit != NULL);
the_run_loop->trigger_exit();
}
void btstack_run_loop_execute_on_main_thread(btstack_context_callback_registration_t * callback_registration){
btstack_assert(the_run_loop != NULL);
btstack_assert(the_run_loop->execute_on_main_thread != NULL);
the_run_loop->execute_on_main_thread(callback_registration);
}
// init must be called before any other run_loop call
void btstack_run_loop_init(const btstack_run_loop_t * run_loop){
btstack_assert(the_run_loop == NULL);
the_run_loop = run_loop;
the_run_loop->init();
}
void btstack_run_loop_deinit(void){
the_run_loop = NULL;
}
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