1 files changed, 112 insertions, 0 deletions
diff --git a/LibOVR/Src/OVR_Linux_UDEV.cpp b/LibOVR/Src/OVR_Linux_UDEV.cpp
new file mode 100644
index 0000000..fafd940
--- /dev/null
+++ b/LibOVR/Src/OVR_Linux_UDEV.cpp
@@ -0,0 +1,112 @@
+/************************************************************************************
+
+Filename    :   OVR_Linux_UDEV.cpp
+Content     :   This is the interface for libudev1 or libudev0 in Linux.
+
+Copyright   :   Copyright 2014 Oculus VR, LLC. All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License");
+you may not use the Oculus VR Rift SDK except in compliance with the License,
+which is provided at the time of installation or download, or which
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.2
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+*************************************************************************************/
+
+#include "OVR_Linux_UDEV.h"
+
+namespace OVR
+{
+namespace Linux
+{
+
+static void *udev_library = nullptr;
+
+#define LOAD_UDEV_SYMBOL(symbol) \
+    dlerror(); \
+    ((void*&)(symbol)) = dlsym(udev_library, #symbol); \
+    if (dlerror()) return false;
+
+bool LoadUDEVSymbols()
+{
+    if (udev_library)
+    {
+        return true;
+    }
+
+    udev_library = nullptr;
+    udev_library = dlopen("libudev.so.1", RTLD_LAZY | RTLD_GLOBAL);
+    if (!udev_library)
+    {
+        udev_library = dlopen("libudev.so.0", RTLD_LAZY | RTLD_GLOBAL);
+    }
+    assert(udev_library);
+
+    LOAD_UDEV_SYMBOL(udev_new);
+    LOAD_UDEV_SYMBOL(udev_unref);
+
+    LOAD_UDEV_SYMBOL(udev_device_new_from_syspath);
+    LOAD_UDEV_SYMBOL(udev_device_get_action);
+    LOAD_UDEV_SYMBOL(udev_device_get_devnode);
+    LOAD_UDEV_SYMBOL(udev_device_get_parent_with_subsystem_devtype);
+    LOAD_UDEV_SYMBOL(udev_device_get_sysattr_value);
+    LOAD_UDEV_SYMBOL(udev_device_unref);
+
+    LOAD_UDEV_SYMBOL(udev_enumerate_new);
+    LOAD_UDEV_SYMBOL(udev_enumerate_add_match_subsystem);
+    LOAD_UDEV_SYMBOL(udev_enumerate_get_list_entry);
+    LOAD_UDEV_SYMBOL(udev_enumerate_scan_devices);
+    LOAD_UDEV_SYMBOL(udev_enumerate_unref);
+
+    LOAD_UDEV_SYMBOL(udev_list_entry_get_name);
+    LOAD_UDEV_SYMBOL(udev_list_entry_get_next);
+
+    LOAD_UDEV_SYMBOL(udev_monitor_new_from_netlink);
+    LOAD_UDEV_SYMBOL(udev_monitor_enable_receiving);
+    LOAD_UDEV_SYMBOL(udev_monitor_filter_add_match_subsystem_devtype);
+    LOAD_UDEV_SYMBOL(udev_monitor_get_fd);
+    LOAD_UDEV_SYMBOL(udev_monitor_receive_device);
+    LOAD_UDEV_SYMBOL(udev_monitor_unref);
+
+    return true;
+}
+
+#undef LOAD_UDEV_SYMBOL
+
+// Function pointers returned from dlsym (global, NOT in OVR::).
+struct udev* (*udev_new)(void);
+void (*udev_unref)(struct udev*);
+
+struct udev_device* (*udev_device_new_from_syspath)(struct udev*, const char*);
+const char* (*udev_device_get_action)(struct udev_device*);
+const char* (*udev_device_get_devnode)(struct udev_device*);
+struct udev_device* (*udev_device_get_parent_with_subsystem_devtype)(struct udev_device*, const char*, const char*);
+const char* (*udev_device_get_sysattr_value)(struct udev_device*, const char*);
+void (*udev_device_unref)(struct udev_device*);
+
+struct udev_enumerate* (*udev_enumerate_new)(struct udev*);
+int (*udev_enumerate_add_match_subsystem)(struct udev_enumerate*, const char*);
+struct udev_list_entry* (*udev_enumerate_get_list_entry)(struct udev_enumerate*);
+int (*udev_enumerate_scan_devices)(struct udev_enumerate*);
+void (*udev_enumerate_unref)(struct udev_enumerate*);
+
+const char* (*udev_list_entry_get_name)(struct udev_list_entry*);
+struct udev_list_entry* (*udev_list_entry_get_next)(struct udev_list_entry *);
+
+struct udev_monitor* (*udev_monitor_new_from_netlink)(struct udev*, const char*);
+int (*udev_monitor_enable_receiving)(struct udev_monitor*);
+int (*udev_monitor_filter_add_match_subsystem_devtype)(struct udev_monitor*, const char*, const char*);
+int (*udev_monitor_get_fd)(struct udev_monitor*);
+struct udev_device* (*udev_monitor_receive_device)(struct udev_monitor*);
+void (*udev_monitor_unref)(struct udev_monitor*);
+
+}} // namespace OVR::Linux