[FL-3833] Furi: event loop (#3675)

* Furi: epoll prototype

* Gui: simplify view_dispatcher custom event processing

* Furi: add missing critical sections to epoll

* Furi: add epoll unit tests, fully implement level processing for in and out events

* Furi: properly trigger epoll item event on adding mq, update tests.

* Unit tests: cleanup defines

* Furi: protect epoll from modification in callback

* Furi: rename epoll into event_loop, cleanup api naming

* Sync API Symbols

* Furi: add event loop contract and link api, port mq to new api, cleanup code

* Format Sources

* Furi: cleanup mq and event loop code

* Furi: remove unused staff from message queue

* ApiSymbols: remove event loop from public APIs.

* Fix furi unit tests

---------

Co-authored-by: Georgii Surkov <georgii.surkov@outlook.com>
Co-authored-by: Georgii Surkov <37121527+gsurkov@users.noreply.github.com>

applications/debug/unit_tests/tests/furi/furi_event_loop.c

@@ -0,0 +1,164 @@
+#include "../test.h"
+#include <furi.h>
+#include <furi_hal.h>
+
+#define TAG "TestFuriEventLoop"
+
+#define EVENT_LOOP_EVENT_COUNT (256u)
+
+typedef struct {
+    FuriMessageQueue* mq;
+
+    FuriEventLoop* producer_event_loop;
+    uint32_t producer_counter;
+
+    FuriEventLoop* consumer_event_loop;
+    uint32_t consumer_counter;
+} TestFuriData;
+
+bool test_furi_event_loop_producer_mq_callback(FuriMessageQueue* queue, void* context) {
+    furi_check(context);
+
+    TestFuriData* data = context;
+    furi_check(data->mq == queue, "Invalid queue");
+
+    FURI_LOG_I(
+        TAG, "producer_mq_callback: %lu %lu", data->producer_counter, data->consumer_counter);
+
+    // Remove and add should not cause crash
+    // if(data->producer_counter == EVENT_LOOP_EVENT_COUNT/2) {
+    //     furi_event_loop_message_queue_remove(data->producer_event_loop, data->mq);
+    //     furi_event_loop_message_queue_add(
+    //     data->producer_event_loop,
+    //     data->mq,
+    //     FuriEventLoopEventOut,
+    //     test_furi_event_loop_producer_mq_callback,
+    //     data);
+    // }
+
+    if(data->producer_counter == EVENT_LOOP_EVENT_COUNT) {
+        furi_event_loop_stop(data->producer_event_loop);
+        return false;
+    }
+
+    data->producer_counter++;
+    furi_check(
+        furi_message_queue_put(data->mq, &data->producer_counter, 0) == FuriStatusOk,
+        "furi_message_queue_put failed");
+    furi_delay_us(furi_hal_random_get() % 1000);
+
+    return true;
+}
+
+int32_t test_furi_event_loop_producer(void* p) {
+    furi_check(p);
+
+    FURI_LOG_I(TAG, "producer start");
+
+    TestFuriData* data = p;
+
+    data->producer_event_loop = furi_event_loop_alloc();
+    furi_event_loop_message_queue_subscribe(
+        data->producer_event_loop,
+        data->mq,
+        FuriEventLoopEventOut,
+        test_furi_event_loop_producer_mq_callback,
+        data);
+
+    furi_event_loop_run(data->producer_event_loop);
+
+    furi_event_loop_message_queue_unsubscribe(data->producer_event_loop, data->mq);
+    furi_event_loop_free(data->producer_event_loop);
+
+    FURI_LOG_I(TAG, "producer end");
+
+    return 0;
+}
+
+bool test_furi_event_loop_consumer_mq_callback(FuriMessageQueue* queue, void* context) {
+    furi_check(context);
+
+    TestFuriData* data = context;
+    furi_check(data->mq == queue);
+
+    furi_delay_us(furi_hal_random_get() % 1000);
+    furi_check(furi_message_queue_get(data->mq, &data->consumer_counter, 0) == FuriStatusOk);
+
+    FURI_LOG_I(
+        TAG, "consumer_mq_callback: %lu %lu", data->producer_counter, data->consumer_counter);
+
+    // Remove and add should not cause crash
+    // if(data->producer_counter == EVENT_LOOP_EVENT_COUNT/2) {
+    //     furi_event_loop_message_queue_remove(data->consumer_event_loop, data->mq);
+    //     furi_event_loop_message_queue_add(
+    //     data->consumer_event_loop,
+    //     data->mq,
+    //     FuriEventLoopEventIn,
+    //     test_furi_event_loop_producer_mq_callback,
+    //     data);
+    // }
+
+    if(data->consumer_counter == EVENT_LOOP_EVENT_COUNT) {
+        furi_event_loop_stop(data->consumer_event_loop);
+        return false;
+    }
+
+    return true;
+}
+
+int32_t test_furi_event_loop_consumer(void* p) {
+    furi_check(p);
+
+    FURI_LOG_I(TAG, "consumer start");
+
+    TestFuriData* data = p;
+
+    data->consumer_event_loop = furi_event_loop_alloc();
+    furi_event_loop_message_queue_subscribe(
+        data->consumer_event_loop,
+        data->mq,
+        FuriEventLoopEventIn,
+        test_furi_event_loop_consumer_mq_callback,
+        data);
+
+    furi_event_loop_run(data->consumer_event_loop);
+
+    furi_event_loop_message_queue_unsubscribe(data->consumer_event_loop, data->mq);
+    furi_event_loop_free(data->consumer_event_loop);
+
+    FURI_LOG_I(TAG, "consumer end");
+
+    return 0;
+}
+
+void test_furi_event_loop(void) {
+    TestFuriData data = {};
+
+    data.mq = furi_message_queue_alloc(16, sizeof(uint32_t));
+
+    FuriThread* producer_thread = furi_thread_alloc();
+    furi_thread_set_name(producer_thread, "producer_thread");
+    furi_thread_set_stack_size(producer_thread, 1 * 1024);
+    furi_thread_set_callback(producer_thread, test_furi_event_loop_producer);
+    furi_thread_set_context(producer_thread, &data);
+    furi_thread_start(producer_thread);
+
+    FuriThread* consumer_thread = furi_thread_alloc();
+    furi_thread_set_name(consumer_thread, "consumer_thread");
+    furi_thread_set_stack_size(consumer_thread, 1 * 1024);
+    furi_thread_set_callback(consumer_thread, test_furi_event_loop_consumer);
+    furi_thread_set_context(consumer_thread, &data);
+    furi_thread_start(consumer_thread);
+
+    // Wait for thread to complete their tasks
+    furi_thread_join(producer_thread);
+    furi_thread_join(consumer_thread);
+
+    // The test itself
+    mu_assert_int_eq(data.producer_counter, data.consumer_counter);
+
+    // Release memory
+    furi_thread_free(consumer_thread);
+    furi_thread_free(producer_thread);
+    furi_message_queue_free(data.mq);
+}

applications/debug/unit_tests/tests/furi/furi_test.c

@@ -6,8 +6,8 @@
 void test_furi_create_open(void);
 void test_furi_concurrent_access(void);
 void test_furi_pubsub(void);
-
 void test_furi_memmgr(void);
+void test_furi_event_loop(void);
 
 static int foo = 0;
 
@@ -38,15 +38,19 @@ MU_TEST(mu_test_furi_memmgr) {
     test_furi_memmgr();
 }
 
+MU_TEST(mu_test_furi_event_loop) {
+    test_furi_event_loop();
+}
+
 MU_TEST_SUITE(test_suite) {
     MU_SUITE_CONFIGURE(&test_setup, &test_teardown);
-
     MU_RUN_TEST(test_check);
 
     // v2 tests
     MU_RUN_TEST(mu_test_furi_create_open);
     MU_RUN_TEST(mu_test_furi_pubsub);
     MU_RUN_TEST(mu_test_furi_memmgr);
+    MU_RUN_TEST(mu_test_furi_event_loop);
 }
 
 int run_minunit_test_furi(void) {