Milestone 5: deliver embedded RDP sessions and lifecycle hardening

third_party/FreeRDP/include/freerdp/utils/signal.h

@@ -0,0 +1,65 @@
+/**
+ * FreeRDP: A Remote Desktop Protocol Implementation
+ * Signal handling
+ *
+ * Copyright 2011 Shea Levy <shea@shealevy.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * 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.
+ */
+
+#ifndef FREERDP_UTILS_SIGNAL_H
+#define FREERDP_UTILS_SIGNAL_H
+
+#include <freerdp/api.h>
+#include <freerdp/types.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+	typedef void (*freerdp_signal_handler_t)(int signum, const char* signame, void* context);
+
+	WINPR_ATTR_NODISCARD
+	FREERDP_API int freerdp_handle_signals(void);
+
+	/** \brief registers a cleanup handler for non fatal signals.
+	 *
+	 *  This allows cleaning up resources like with \b atexit but for signals.
+	 *
+	 *  \param context a context for the clenaup handler.
+	 *  \param handler the function to call on cleanup. Must not be \b nullptr
+	 *
+	 *  \return \b TRUE if registered successfully, \b FALSE otherwise.
+	 */
+	WINPR_ATTR_NODISCARD
+	FREERDP_API BOOL freerdp_add_signal_cleanup_handler(void* context,
+	                                                    freerdp_signal_handler_t handler);
+
+	/** \brief unregisters a cleanup handler for non fatal signals.
+	 *
+	 *  This allows removal of a cleanup handler for signals.
+	 *
+	 *  \param context a context for the clenaup handler.
+	 *  \param handler the function to call on cleanup. Must not be \b nullptr
+	 *
+	 *  \return \b TRUE if unregistered successfully, \b FALSE otherwise.
+	 */
+	FREERDP_API BOOL freerdp_del_signal_cleanup_handler(void* context,
+	                                                    freerdp_signal_handler_t handler);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* FREERDP_UTILS_SIGNAL_H */