Pubsub core api feature (#174)

* fixed inline functions for modern C standart

* pubsub api, base version

* basic test for pubsub

* update applications.mk, add test file

* more test for pubsub

* remove unimplemented files, cleanup header file

* remove legacy tests, check unsubscribe not call cb

* implement deleting mutex, fail test

* release mutex before deleting

Co-authored-by: aanper <mail@s3f.ru>

applications/tests/furi_pubsub_test.c

@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <string.h>
+#include "flipper_v2.h"
+#include "log.h"
+
+#include "minunit.h"
+
+const uint32_t context_value = 0xdeadbeef;
+const uint32_t notify_value_0 = 0x12345678;
+const uint32_t notify_value_1 = 0x11223344;
+
+uint32_t pubsub_value = 0;
+uint32_t pubsub_context_value = 0;
+
+void test_pubsub_handler(void* arg, void* ctx) {
+    pubsub_value = *(uint32_t*)arg;
+    pubsub_context_value = *(uint32_t*)ctx;
+}
+
+void test_furi_pubsub() {
+    bool result;
+    PubSub test_pubsub;
+    PubSubItem* test_pubsub_item;
+
+    // init pubsub case
+    result = init_pubsub(&test_pubsub);
+    mu_assert(result, "init pubsub failed");
+
+    // subscribe pubsub case
+    test_pubsub_item = subscribe_pubsub(&test_pubsub, test_pubsub_handler, (void*)&context_value);
+    mu_assert_pointers_not_eq(test_pubsub_item, NULL);
+
+    /// notify pubsub case
+    result = notify_pubsub(&test_pubsub, (void*)&notify_value_0);
+    mu_assert(result, "notify pubsub failed");
+    mu_assert_int_eq(pubsub_value, notify_value_0);
+    mu_assert_int_eq(pubsub_context_value, context_value);
+
+    // unsubscribe pubsub case
+    result = unsubscribe_pubsub(test_pubsub_item);
+    mu_assert(result, "unsubscribe pubsub failed");
+
+    result = unsubscribe_pubsub(test_pubsub_item);
+    mu_assert(!result, "unsubscribe pubsub not failed");
+
+    /// notify unsubscribed pubsub case
+    result = notify_pubsub(&test_pubsub, (void*)&notify_value_1);
+    mu_assert(result, "notify pubsub failed");
+    mu_assert_int_not_eq(pubsub_value, notify_value_1);
+
+    // delete pubsub case
+    result = delete_pubsub(&test_pubsub);
+    mu_assert(result, "unsubscribe pubsub failed");
+
+    // TODO test case that the pubsub_delete will remove pubsub from heap
+}