From 99204311bdae8f8e6316a9a23411d65ec9843b30 Mon Sep 17 00:00:00 2001
From: Eran <librealsense.eran@gmail.com>
Date: Wed, 11 Oct 2023 09:00:35 +0300
Subject: [PATCH] add test-deadlock

---
 unit-tests/live/test-deadlock.cpp | 92 +++++++++++++++++++++++++++++++
 unit-tests/live/test-deadlock.py  | 62 +++++++++++++++++++++
 2 files changed, 154 insertions(+)
 create mode 100644 unit-tests/live/test-deadlock.cpp
 create mode 100644 unit-tests/live/test-deadlock.py

diff --git a/unit-tests/live/test-deadlock.cpp b/unit-tests/live/test-deadlock.cpp
new file mode 100644
index 00000000000..a9f4e956a43
--- /dev/null
+++ b/unit-tests/live/test-deadlock.cpp
@@ -0,0 +1,92 @@
+// License: Apache 2.0. See LICENSE file in root directory.
+// Copyright(c) 2023 Intel Corporation. All Rights Reserved.
+
+//#test:device D400*
+
+#include "live-common.h"
+#include <iostream>
+#include <chrono>
+
+using namespace rs2;
+
+
+#if 0
+TEST_CASE( "simple iteration over query_devices", "[live]" )
+{
+    rs2::context ctx;
+    rs2::device device;
+
+    std::cout << "Librealsense - " << RS2_API_VERSION_STR << std::endl;
+
+    rs2::device_list list = ctx.query_devices();
+    std::cout << "You have " << list.size() << " RealSense devices connected before triggering reset" << std::endl;
+
+    /* Reset all the devices */
+    for( uint32_t dev_idx = 0; dev_idx < list.size(); dev_idx++ )
+    {
+        rs2::device dev = list[dev_idx];
+    }
+}
+#endif
+
+
+TEST_CASE( "deadlock", "[live]" )
+{
+    rs2::context ctx;
+
+    std::cout << "Librealsense - " << RS2_API_VERSION_STR << std::endl;
+
+    rs2::device_list list = ctx.query_devices();
+    std::cout << "You have " << list.size() << " RealSense devices connected before triggering reset" << std::endl;
+    std::vector< rs2::device > devices;
+
+    // Get all the devices
+    for( uint32_t dev_idx = 0; dev_idx < list.size(); dev_idx++ )
+        devices.push_back( list[dev_idx] );
+
+    // Set up a callback
+    ctx.set_devices_changed_callback(
+        [&devices]( rs2::event_information const & i )
+        {
+            for( auto & d : devices )
+            {
+                if( d && i.was_removed( d ) )
+                {
+                    std::cout << "--- " << d.get_info( RS2_CAMERA_INFO_NAME ) << std::endl;
+                    d = rs2::device();  // destroy it while we're in the callback
+                }
+            }
+            for( auto & d : i.get_new_devices() )
+            {
+                std::cout << "+++ " << d.get_info( RS2_CAMERA_INFO_NAME ) << std::endl;
+                devices.push_back( d );
+            }
+        } );
+
+    // Reset everything
+    for( auto & dev : devices )
+        dev.hardware_reset();
+
+    std::this_thread::sleep_for( std::chrono::seconds( 6 ) );
+
+    list = ctx.query_devices();
+    std::cout << "You have " << list.size() << " RealSense devices connected after reset" << std::endl;
+
+    for( uint32_t dev_idx = 0; dev_idx < list.size(); dev_idx++ )
+    {
+        {
+            rs2::device dev;
+            dev = list[dev_idx];
+
+            /* Add 500 ms delay to avoid deadlock */
+            // usleep(500000);
+
+            // Select the device required. For example, lets select dev_idx = 0.
+            if( dev_idx == 0 )
+            {
+                //device = dev;
+                //break;
+            }
+        }
+    }
+}
diff --git a/unit-tests/live/test-deadlock.py b/unit-tests/live/test-deadlock.py
new file mode 100644
index 00000000000..433b9a6c16a
--- /dev/null
+++ b/unit-tests/live/test-deadlock.py
@@ -0,0 +1,62 @@
+# License: Apache 2.0. See LICENSE file in root directory.
+# Copyright(c) 2023 Intel Corporation. All Rights Reserved.
+
+#test:device D400* !D457
+
+import pyrealsense2 as rs
+from rspy import test, log
+from time import sleep
+
+c = rs.context( '{"dds":false}' )
+
+device_was_removed = False
+device_was_added = False
+def callback( info ):
+    global dev, device_was_removed, device_was_added
+    print( '----> callback is called' )
+    if dev is not None:
+        if info.was_removed( dev ):
+            log.i( 'device was removed' )
+            device_was_removed = True
+            dev = None
+    for handle in info.get_new_devices():
+        log.i( 'new device=', handle )
+        if dev is None:
+            dev = handle
+            device_was_added = True
+    print( '<---- callback returning' )
+c.set_devices_changed_callback( callback )
+
+#sleep(2)
+
+test.start( 'get the device' )
+dev = None
+for dev in c.query_devices():
+    break
+test.check( dev is not None )
+test.finish()
+
+del c
+
+test.start( 'resetting the device' )
+dev.hardware_reset()
+count = 10
+while count > 0 and not device_was_removed:
+    sleep( 0.5 )
+    count -= 1
+test.info( 'device', dev )
+test.check( device_was_removed )
+test.finish()
+
+test.start( 'wait for it' )
+count = 10
+while count > 0 and not device_was_added:
+    sleep( 0.5 )
+    count -= 1
+test.info( 'device', dev )
+test.check( device_was_added )
+test.finish()
+
+#sleep(2)
+
+test.print_results_and_exit()