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btstack_run_loop_posix: implement poll_data_sources_from_irq

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This commit is contained in:
Matthias Ringwald 2021-07-01 22:11:58 +02:00
parent 41158b7431
commit 90d4f18637
1 changed files with 72 additions and 38 deletions
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110
platform/posix/btstack_run_loop_posix.c
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@ -62,14 +62,18 @@
#include <pthread.h>
// the run loop
static int data_sources_modified;
static int btstack_run_loop_posix_data_sources_modified;
static bool run_loop_exit_requested;
static bool btstack_run_loop_posix_exit_requested;
// to trigger run loop from other thread
static int run_loop_pipe_fd;
static btstack_data_source_t run_loop_pipe_ds;
static pthread_mutex_t run_loop_callback_mutex = PTHREAD_MUTEX_INITIALIZER;
// to trigger process callbacks other thread
static pthread_mutex_t btstack_run_loop_posix_callbacks_mutex = PTHREAD_MUTEX_INITIALIZER;
static int btstack_run_loop_posix_process_callbacks_fd;
static btstack_data_source_t btstack_run_loop_posix_process_callbacks_ds;
// to trigger poll data sources from irq
static int btstack_run_loop_posix_poll_data_sources_fd;
static btstack_data_source_t btstack_run_loop_posix_poll_data_sources_ds;
// start time. tv_usec/tv_nsec = 0
#ifdef _POSIX_MONOTONIC_CLOCK
@ -84,7 +88,7 @@ static struct timeval init_tv;
* Add data_source to run_loop
*/
static void btstack_run_loop_posix_add_data_source(btstack_data_source_t *ds){
data_sources_modified = 1;
btstack_run_loop_posix_data_sources_modified = 1;
btstack_run_loop_base_add_data_source(ds);
}
@ -92,7 +96,7 @@ static void btstack_run_loop_posix_add_data_source(btstack_data_source_t *ds){
* Remove data_source from run loop
*/
static bool btstack_run_loop_posix_remove_data_source(btstack_data_source_t *ds){
data_sources_modified = 1;
btstack_run_loop_posix_data_sources_modified = 1;
return btstack_run_loop_base_remove_data_source(ds);
}
@ -167,7 +171,7 @@ static void btstack_run_loop_posix_execute(void) {
log_info("POSIX run loop using ettimeofday fallback.");
#endif
while (run_loop_exit_requested == false) {
while (btstack_run_loop_posix_exit_requested == false) {
// collect FDs
FD_ZERO(&descriptors_read);
FD_ZERO(&descriptors_write);
@ -206,16 +210,16 @@ static void btstack_run_loop_posix_execute(void) {
// wait for ready FDs
select( highest_fd+1 , &descriptors_read, &descriptors_write, NULL, timeout);
data_sources_modified = 0;
btstack_run_loop_posix_data_sources_modified = 0;
btstack_linked_list_iterator_init(&it, &btstack_run_loop_base_data_sources);
while (btstack_linked_list_iterator_has_next(&it) && !data_sources_modified){
while (btstack_linked_list_iterator_has_next(&it) && !btstack_run_loop_posix_data_sources_modified){
btstack_data_source_t *ds = (btstack_data_source_t*) btstack_linked_list_iterator_next(&it);
log_debug("btstack_run_loop_posix_execute: check ds %p with fd %u\n", ds, ds->source.fd);
if (FD_ISSET(ds->source.fd, &descriptors_read)) {
log_debug("btstack_run_loop_posix_execute: process read ds %p with fd %u\n", ds, ds->source.fd);
ds->process(ds, DATA_SOURCE_CALLBACK_READ);
}
if (data_sources_modified) break;
if (btstack_run_loop_posix_data_sources_modified) break;
if (FD_ISSET(ds->source.fd, &descriptors_write)) {
log_debug("btstack_run_loop_posix_execute: process write ds %p with fd %u\n", ds, ds->source.fd);
ds->process(ds, DATA_SOURCE_CALLBACK_WRITE);
@ -230,7 +234,7 @@ static void btstack_run_loop_posix_execute(void) {
}
static void btstack_run_loop_posix_trigger_exit(void){
run_loop_exit_requested = true;
btstack_run_loop_posix_exit_requested = true;
}
// set timer
@ -240,16 +244,39 @@ static void btstack_run_loop_posix_set_timer(btstack_timer_source_t *a, uint32_t
log_debug("btstack_run_loop_posix_set_timer to %u ms (now %u, timeout %u)", a->timeout, time_ms, timeout_in_ms);
}
static void btstack_run_loop_posix_pipe_process(btstack_data_source_t * ds, btstack_data_source_callback_type_t callback_type){
// trigger pipe
static void btstack_run_loop_posix_trigger_pipe(int fd){
if (fd < 0) return;
const uint8_t x = (uint8_t) 'x';
(void) write(fd, &x, 1);
}
// poll data sources from irq
static void btstack_run_loop_posix_poll_data_sources_handler(btstack_data_source_t * ds, btstack_data_source_callback_type_t callback_type){
UNUSED(callback_type);
uint8_t buffer[1];
(void) read(ds->source.fd, buffer, 1);
// poll data sources
btstack_run_loop_base_poll_data_sources();
}
static void btstack_run_loop_posix_poll_data_sources_from_irq(void){
// trigger run loop
btstack_run_loop_posix_trigger_pipe(btstack_run_loop_posix_poll_data_sources_fd);
}
// execute on main thread from same or different thread
static void btstack_run_loop_posix_process_callbacks_handler(btstack_data_source_t * ds, btstack_data_source_callback_type_t callback_type){
UNUSED(callback_type);
log_info("btstack_run_loop_posix_pipe_process");
uint8_t buffer[1];
(void) read(ds->source.fd, buffer, 1);
// execute callbacks - protect list with mutex
while (1){
pthread_mutex_lock(&run_loop_callback_mutex);
pthread_mutex_lock(&btstack_run_loop_posix_callbacks_mutex);
btstack_context_callback_registration_t * callback_registration = (btstack_context_callback_registration_t *) btstack_linked_list_pop(&btstack_run_loop_base_callbacks);
pthread_mutex_unlock(&run_loop_callback_mutex);
pthread_mutex_unlock(&btstack_run_loop_posix_callbacks_mutex);
if (callback_registration == NULL){
break;
}
@ -259,14 +286,28 @@ static void btstack_run_loop_posix_pipe_process(btstack_data_source_t * ds, btst
static void btstack_run_loop_posix_execute_on_main_thread(btstack_context_callback_registration_t * callback_registration){
// protect list with mutex
pthread_mutex_lock(&run_loop_callback_mutex);
pthread_mutex_lock(&btstack_run_loop_posix_callbacks_mutex);
btstack_run_loop_base_add_callback(callback_registration);
pthread_mutex_unlock(&run_loop_callback_mutex);
pthread_mutex_unlock(&btstack_run_loop_posix_callbacks_mutex);
// trigger run loop
if (run_loop_pipe_fd >= 0){
const uint8_t x = (uint8_t) 'x';
(void) write(run_loop_pipe_fd, &x, 1);
btstack_run_loop_posix_trigger_pipe(btstack_run_loop_posix_process_callbacks_fd);
}
//init
// @return fd >= 0 on success
static int btstack_run_loop_posix_register_pipe_datasource(btstack_data_source_t * data_source){
int fildes[2]; // 0 = read, 1 = write
int status = pipe(fildes);
if (status != 0){
log_error("pipe() failed");
return -1;
}
data_source->source.fd = fildes[0];
data_source->flags = DATA_SOURCE_CALLBACK_READ;
btstack_run_loop_base_add_data_source(data_source);
log_info("Pipe: in %u, out %u", fildes[1], fildes[0]);
return fildes[1];
}
static void btstack_run_loop_posix_init(void){
@ -281,20 +322,13 @@ static void btstack_run_loop_posix_init(void){
init_tv.tv_usec = 0;
#endif
// create pipe and register as data source
int fildes[2];
int status = pipe(fildes);
if (status == 0 ) {
run_loop_pipe_fd = fildes[1];
run_loop_pipe_ds.source.fd = fildes[0];
run_loop_pipe_ds.flags = DATA_SOURCE_CALLBACK_READ;
run_loop_pipe_ds.process = &btstack_run_loop_posix_pipe_process;
btstack_run_loop_base_add_data_source(&run_loop_pipe_ds);
log_info("Pipe in %u, out %u", run_loop_pipe_fd, fildes[0]);
} else {
run_loop_pipe_fd = -1;
log_error("pipe() failed");
}
// setup pipe to trigger process callbacks
btstack_run_loop_posix_process_callbacks_ds.process = &btstack_run_loop_posix_process_callbacks_handler;
btstack_run_loop_posix_process_callbacks_fd = btstack_run_loop_posix_register_pipe_datasource(&btstack_run_loop_posix_process_callbacks_ds);
// setup pipe to poll data sources
btstack_run_loop_posix_poll_data_sources_ds.process = &btstack_run_loop_posix_poll_data_sources_handler;
btstack_run_loop_posix_poll_data_sources_fd = btstack_run_loop_posix_register_pipe_datasource(&btstack_run_loop_posix_poll_data_sources_ds);
}
static const btstack_run_loop_t btstack_run_loop_posix = {
@ -309,8 +343,8 @@ static const btstack_run_loop_t btstack_run_loop_posix = {
&btstack_run_loop_posix_execute,
&btstack_run_loop_base_dump_timer,
&btstack_run_loop_posix_get_time_ms,
NULL, /* poll data sources from irq */
btstack_run_loop_posix_execute_on_main_thread,
&btstack_run_loop_posix_poll_data_sources_from_irq,
&btstack_run_loop_posix_execute_on_main_thread,
&btstack_run_loop_posix_trigger_exit,
};