Refactor multithreading API

test/mongoose_custom.c

@@ -20,18 +20,12 @@ void mg_mgr_poll(struct mg_mgr *mgr, int ms) {
 
 bool mg_send(struct mg_connection *c, const void *buf, size_t len) {
   (void) c, (void) buf, (void) len;
-  return 0;
+  return false;
 }
 
-bool mg_mgr_wakeup(struct mg_connection *c, const void *buf, size_t len) {
-  (void) c, (void) buf, (void) len;
-  return 0;
-}
-
-struct mg_connection *mg_mkpipe(struct mg_mgr *mgr, mg_event_handler_t fn,
-                                void *fn_data) {
+int mg_mkpipe(struct mg_mgr *mgr, mg_event_handler_t fn, void *fn_data) {
   (void) mgr, (void) fn, (void) fn_data;
-  return NULL;
+  return -1;
 }
 
 void _fini(void);

test/unit_test.c

@@ -1720,13 +1720,20 @@ static void eh6(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
   (void) c, (void) ev_data;
 }
 
+#ifdef __arm__
+int send(int sock, const void *buf, size_t len, int flags);
+int send(int sock, const void *buf, size_t len, int flags) {
+  (void) sock, (void) buf, (void) len, (void) flags;
+  return -1;
+}
+#endif
+
 static void test_pipe(void) {
   struct mg_mgr mgr;
-  struct mg_connection *c;
-  int i, done = 0;
+  int i, sock, done = 0;
   mg_mgr_init(&mgr);
-  ASSERT((c = mg_mkpipe(&mgr, eh6, (void *) &done)) != NULL);
-  mg_mgr_wakeup(c, "", 1);
+  ASSERT((sock = mg_mkpipe(&mgr, eh6, (void *) &done)) >= 0);
+  ASSERT(send(sock, "hi", 2, 0) == 2);
   for (i = 0; i < 10 && done == 0; i++) mg_mgr_poll(&mgr, 1);
   ASSERT(done == 1);
   mg_mgr_free(&mgr);