[PATCH BlueZ 0/1 v2] ELL based mainloop

[PATCH BlueZ 0/1 v2] ELL based mainloop

[Inga Stotland]

This patch addresses a need to enable using common mainloop for the
ell-based apps that desire to use common bluetooth fuctionality
(e.g., bt_shell).

Note: A bit awkward callback handling there is due to the discrepancy
in the arg type for signo (signal number).

src/shared/mainloop.h:
typedef void (*mainloop_signal_func) (int signum, void *user_data)

and ell/main.h:

typedef void (*l_main_signal_cb_t) (uint32_t signo, void *user_data)

My guess is that ell derives the unsigned int type from <sys/signalfd.h>,
where ssi_signo is defined as uint32_t. BlueZ is probably following the
standard Linux signal handling, where signal is represented as an int. 

Inga Stotland (1):
  shared/mainloop: Add ell-based mainloop implementation

 Makefile.am               |  11 +++-
 src/shared/mainloop-ell.c | 129 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 137 insertions(+), 3 deletions(-)
 create mode 100644 src/shared/mainloop-ell.c

-- 
2.21.0

[PATCH BlueZ 1/1 v2] shared/mainloop: Add ell-based mainloop implementation

[Inga Stotland]

This adds implementation of wrapper mainloop functions to interact with
ell main APIs, enabling support for the applications that link with ell
library and use mainloop functionality.
---
 Makefile.am               |  11 +++-
 src/shared/mainloop-ell.c | 129 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 137 insertions(+), 3 deletions(-)
 create mode 100644 src/shared/mainloop-ell.c

diff --git a/Makefile.am b/Makefile.am
index 9d25a815b..0fccc2e72 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -162,6 +162,10 @@ CLEANFILES += $(ell_built_sources)
 
 noinst_LTLIBRARIES += src/libshared-glib.la src/libshared-mainloop.la
 
+if LIBSHARED_ELL
+noinst_LTLIBRARIES += src/libshared-ell.la
+endif
+
 shared_sources = src/shared/io.h src/shared/timeout.h \
 			src/shared/queue.h src/shared/queue.c \
 			src/shared/util.h src/shared/util.c \
@@ -206,10 +210,10 @@ src_libshared_mainloop_la_SOURCES = $(shared_sources) \
 				src/shared/mainloop-notify.c
 
 if LIBSHARED_ELL
-noinst_LTLIBRARIES += src/libshared-ell.la
-
 src_libshared_ell_la_SOURCES = $(shared_sources) \
-				src/shared/io-ell.c
+				src/shared/io-ell.c \
+				src/shared/mainloop.h \
+				src/shared/mainloop-ell.c
 endif
 
 attrib_sources = attrib/att.h attrib/att-database.h attrib/att.c \
diff --git a/src/shared/mainloop-ell.c b/src/shared/mainloop-ell.c
new file mode 100644
index 000000000..027c8a0ef
--- /dev/null
+++ b/src/shared/mainloop-ell.c
@@ -0,0 +1,129 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2019  Intel Corporation
+ *
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include <ell/ell.h>
+
+#include "mainloop.h"
+
+static bool is_initialized;
+static int exit_status;
+static mainloop_signal_func sig_func;
+
+static void l_sig_func(uint32_t signo, void *user_data)
+{
+	if (sig_func)
+		sig_func(signo, user_data);
+}
+
+void mainloop_init(void)
+{
+	is_initialized = l_main_init();
+}
+
+void mainloop_quit(void)
+{
+	l_main_quit();
+}
+
+void mainloop_exit_success(void)
+{
+	exit_status = EXIT_SUCCESS;
+	l_main_quit();
+}
+
+void mainloop_exit_failure(void)
+{
+	exit_status = EXIT_FAILURE;
+	l_main_quit();
+}
+
+int mainloop_run(void)
+{
+	if (!is_initialized)
+		return -EINVAL;
+
+	l_main_run();
+
+	is_initialized = false;
+	sig_func = NULL;
+
+	return exit_status;
+}
+
+int mainloop_run_with_signal(mainloop_signal_func func, void *user_data)
+{
+	if (!is_initialized || !func)
+		return -EINVAL;
+
+	/* Workaround for sign discrepancy in ell and bluez */
+	sig_func = func;
+
+	return l_main_run_with_signal(l_sig_func, user_data);
+}
+
+int mainloop_add_fd(int fd, uint32_t events, mainloop_event_func callback,
+				void *user_data, mainloop_destroy_func destroy)
+{
+	return -ENOSYS;
+}
+
+int mainloop_modify_fd(int fd, uint32_t events)
+{
+	return -ENOSYS;
+}
+
+int mainloop_remove_fd(int fd)
+{
+	return -ENOSYS;
+}
+
+int mainloop_add_timeout(unsigned int msec, mainloop_timeout_func callback,
+				void *user_data, mainloop_destroy_func destroy)
+{
+	return -ENOSYS;
+}
+
+int mainloop_modify_timeout(int fd, unsigned int msec)
+{
+	return -ENOSYS;
+}
+
+int mainloop_remove_timeout(int id)
+{
+	return -ENOSYS;
+}
+
+int mainloop_set_signal(sigset_t *mask, mainloop_signal_func callback,
+				void *user_data, mainloop_destroy_func destroy)
+{
+	return -ENOSYS;
+}
-- 
2.21.0