asio: updated ASIO port to use latest asio and esp-idf features

closes https://github.com/espressif/esp-idf/issues/4296

components/asio/asio

@@ -1 +1 @@
-Subproject commit 55efc179b76139c8f9b44bf22a4aba4803f7a7bd
+Subproject commit 3b66e5b051381fb70de9c2791df70a06181c64e3

components/asio/port/include/esp_asio_config.h

@@ -22,8 +22,12 @@
 #  define ASIO_NO_EXCEPTIONS
 # endif   // CONFIG_COMPILER_CXX_EXCEPTIONS
 
+# ifndef CONFIG_COMPILER_RTTI
+#  define ASIO_NO_TYPEID
+# endif   // CONFIG_COMPILER_RTTI
+
 //
-// LWIP compatifility inet and address macros/functions
+// LWIP compatibility inet and address macros/functions
 //
 # define LWIP_COMPAT_SOCKET_INET 1
 # define LWIP_COMPAT_SOCKET_ADDR 1
@@ -34,12 +38,6 @@
 # define ASIO_DISABLE_SERIAL_PORT
 # define ASIO_SEPARATE_COMPILATION
 # define ASIO_STANDALONE
-# define ASIO_NO_TYPEID
-# define ASIO_DISABLE_SIGNAL
 # define ASIO_HAS_PTHREADS
-# define ASIO_DISABLE_EPOLL
-# define ASIO_DISABLE_EVENTFD
-# define ASIO_DISABLE_SIGNAL
-# define ASIO_DISABLE_SIGACTION
 
 #endif // _ESP_ASIO_CONFIG_H_

components/newlib/pthread.c

@@ -5,7 +5,7 @@ const static char *TAG = "esp32_asio_pthread";
 
 int pthread_condattr_setclock(pthread_condattr_t *attr, clockid_t clock_id) 
 {
-    ESP_LOGW(TAG, "%s: not yet supported!", __FUNCTION__);   
+    ESP_LOGW(TAG, "%s: not yet supported!", __func__);
     return 0;
 }
 
@@ -14,6 +14,24 @@ int pthread_setcancelstate(int state, int *oldstate)
     return 0;
 }
 
+//  This functions (pthread_sigmask(), sigfillset) are called from ASIO::signal_blocker to temporarily silence signals
+//  Since signals are not yet supported in ESP pthread these functions serve as no-ops
+//
+int pthread_sigmask(int how, const sigset_t *restrict set, sigset_t *restrict oset)
+{
+    ESP_LOGD(TAG, "%s: Signals not supported in ESP pthread", __func__);
+    return 0;
+}
+
+int sigfillset(sigset_t *what)
+{
+    ESP_LOGD(TAG, "%s: Signals not supported in ESP pthread", __func__);
+    if (what != NULL) {
+        *what = ~0;
+    }
+    return 0;
+}
+
 void newlib_include_pthread_impl(void)
 {
     // Linker hook, exists for no other purpose

docs/en/api-reference/protocols/asio.rst

@@ -15,18 +15,17 @@ Supported features
 ^^^^^^^^^^^^^^^^^^
 ESP platform port currently supports only network asynchronous socket operations; does not support serial port and ssl.
 Internal asio settings for ESP include
-- EXCEPTIONS: Supported, choice in menuconfig
+
-- SIGNAL, SIGACTION: Not supported
+- EXCEPTIONS are enabled in ASIO if enabled in menuconfig
-- EPOLL, EVENTFD: Not supported
+- TYPEID is enabled in ASIO if enabled in menuconfig
-- TYPEID: Disabled by default, but supported in toolchain and asio (provided stdlib recompiled with -frtti)
 
 Application Example
 -------------------
-ESP examples are based on standard asio examples `examples/protocols/asio`:
+ESP examples are based on standard asio :example:`examples/protocols/asio`:
-- udp_echo_server
+
-- tcp_echo_server
+- :example:`examples/protocols/asio/udp_echo_server`
-- chat_client
+- :example:`examples/protocols/asio/tcp_echo_server`
-- chat_server
+- :example:`examples/protocols/asio/chat_client`
+- :example:`examples/protocols/asio/chat_server`
+
 Please refer to the specific example README.md for details
-
-