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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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291 lines
9 KiB
C#
291 lines
9 KiB
C#
// Log.cs - Wrapper for message logging functions
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//
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// Authors:
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// Gonzalo Paniagua Javier (gonzalo@ximian.com)
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//
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//
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// Copyright (c) 2002 Gonzalo Paniagua
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the Lesser GNU General
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// Public License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this program; if not, write to the
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// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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//
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namespace Gst.GLib {
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using System;
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using System.Collections;
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using System.Runtime.InteropServices;
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public delegate void LogFunc (string log_domain, LogLevelFlags log_level, string message);
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public delegate void PrintFunc (string message);
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[Flags]
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public enum LogLevelFlags : int
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{
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/* log flags */
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FlagRecursion = 1 << 0,
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FlagFatal = 1 << 1,
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/* Gst.GLib log levels */
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Error = 1 << 2, /* always fatal */
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Critical = 1 << 3,
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Warning = 1 << 4,
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Message = 1 << 5,
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Info = 1 << 6,
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Debug = 1 << 7,
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/* Convenience values */
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AllButFatal = 253,
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AllButRecursion = 254,
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All = 255,
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FlagMask = 3,
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LevelMask = unchecked ((int) 0xFFFFFFFC)
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}
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public class Log {
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[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
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delegate void LogFuncNative (IntPtr log_domain, LogLevelFlags flags, IntPtr message, IntPtr user_data);
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static LogFuncNative native_handler;
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static void NativeCallback (IntPtr log_domain_native, LogLevelFlags flags, IntPtr message_native, IntPtr user_data)
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{
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if (user_data == IntPtr.Zero)
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return;
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string log_domain = Marshaller.Utf8PtrToString (log_domain_native);
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string message = Marshaller.Utf8PtrToString (message_native);
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GCHandle gch = (GCHandle) user_data;
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LogFunc func = gch.Target as LogFunc;
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if (func != null)
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func (log_domain, flags, message);
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}
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[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
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delegate void PrintFuncNative (IntPtr message);
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class PrintHelper {
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PrintFuncNative native;
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PrintFunc managed;
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public PrintHelper (PrintFuncNative native)
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{
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this.native = native;
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}
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public PrintHelper (PrintFunc managed)
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{
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this.managed = managed;
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GCHandle.Alloc (this);
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}
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void Callback (IntPtr nmessage)
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{
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string message = Marshaller.Utf8PtrToString (nmessage);
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managed (message);
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}
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void Invoke (string message)
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{
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IntPtr nmessage = Marshaller.StringToPtrGStrdup (message);
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native (nmessage);
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Marshaller.Free (nmessage);
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}
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public PrintFuncNative Handler {
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get { return new PrintFuncNative (Callback); }
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}
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public PrintFunc Invoker {
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get { return new PrintFunc (Invoke); }
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}
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}
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static System.Collections.Generic.Dictionary<uint, GCHandle> handlers;
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static void EnsureHash ()
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{
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if (handlers == null)
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handlers = new System.Collections.Generic.Dictionary<uint, GCHandle> ();
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}
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[DllImport ("libglib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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static extern void g_logv (IntPtr log_domain, LogLevelFlags flags, IntPtr message);
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public void WriteLog (string logDomain, LogLevelFlags flags, string format, params object [] args)
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{
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IntPtr ndom = Marshaller.StringToPtrGStrdup (logDomain);
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IntPtr nmessage = Marshaller.StringToPtrGStrdup (String.Format (format, args));
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g_logv (ndom, flags, nmessage);
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Marshaller.Free (ndom);
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Marshaller.Free (nmessage);
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}
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[DllImport ("libglib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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static extern uint g_log_set_handler (IntPtr log_domain, LogLevelFlags flags, LogFuncNative log_func, IntPtr user_data);
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public static uint SetLogHandler (string logDomain, LogLevelFlags flags, LogFunc logFunc)
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{
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if (native_handler == null)
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native_handler = new LogFuncNative (NativeCallback);
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IntPtr ndom = Marshaller.StringToPtrGStrdup (logDomain);
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GCHandle gch = GCHandle.Alloc (logFunc);
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uint result = g_log_set_handler (ndom, flags, native_handler, (IntPtr) gch);
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Marshaller.Free (ndom);
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EnsureHash ();
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handlers [result] = gch;
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return result;
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}
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[DllImport ("libglib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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static extern uint g_log_remove_handler (IntPtr log_domain, uint handler_id);
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public static void RemoveLogHandler (string logDomain, uint handlerID)
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{
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if (handlers != null && handlers.ContainsKey (handlerID)) {
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handlers [handlerID].Free ();
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handlers.Remove (handlerID);
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}
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IntPtr ndom = Marshaller.StringToPtrGStrdup (logDomain);
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g_log_remove_handler (ndom, handlerID);
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Marshaller.Free (ndom);
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}
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[DllImport ("libglib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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static extern PrintFuncNative g_set_print_handler (PrintFuncNative handler);
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public static PrintFunc SetPrintHandler (PrintFunc handler)
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{
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PrintHelper helper = new PrintHelper (handler);
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PrintFuncNative prev = g_set_print_handler (helper.Handler);
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helper = new PrintHelper (prev);
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return helper.Invoker;
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}
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[DllImport ("libglib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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static extern PrintFuncNative g_set_printerr_handler (PrintFuncNative handler);
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public static PrintFunc SetPrintErrorHandler (PrintFunc handler)
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{
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PrintHelper helper = new PrintHelper (handler);
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PrintFuncNative prev = g_set_printerr_handler (helper.Handler);
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helper = new PrintHelper (prev);
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return helper.Invoker;
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}
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[DllImport ("libglib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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static extern void g_log_default_handler (IntPtr log_domain, LogLevelFlags log_level, IntPtr message, IntPtr unused_data);
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public static void DefaultHandler (string logDomain, LogLevelFlags logLevel, string message)
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{
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IntPtr ndom = Marshaller.StringToPtrGStrdup (logDomain);
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IntPtr nmess = Marshaller.StringToPtrGStrdup (message);
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g_log_default_handler (ndom, logLevel, nmess, IntPtr.Zero);
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Marshaller.Free (ndom);
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Marshaller.Free (nmess);
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}
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[DllImport ("libglib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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extern static LogLevelFlags g_log_set_always_fatal (LogLevelFlags fatal_mask);
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public static LogLevelFlags SetAlwaysFatal (LogLevelFlags fatalMask)
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{
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return g_log_set_always_fatal (fatalMask);
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}
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[DllImport ("libglib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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extern static LogLevelFlags g_log_set_fatal_mask (IntPtr log_domain, LogLevelFlags fatal_mask);
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public static LogLevelFlags SetAlwaysFatal (string logDomain, LogLevelFlags fatalMask)
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{
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IntPtr ndom = Marshaller.StringToPtrGStrdup (logDomain);
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LogLevelFlags result = g_log_set_fatal_mask (ndom, fatalMask);
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Marshaller.Free (ndom);
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return result;
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}
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class Invoker {
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LogFuncNative native;
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public Invoker (LogFuncNative native)
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{
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this.native = native;
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}
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void Invoke (string log_domain, LogLevelFlags flags, string message)
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{
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IntPtr ndom = Marshaller.StringToPtrGStrdup (log_domain);
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IntPtr nmess = Marshaller.StringToPtrGStrdup (message);
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native (ndom, flags, nmess, IntPtr.Zero);
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Marshaller.Free (ndom);
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Marshaller.Free (nmess);
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}
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public LogFunc Handler {
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get { return new LogFunc (Invoke); }
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}
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}
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[DllImport ("libglib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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extern static LogFuncNative g_log_set_default_handler (LogFuncNative log_func, IntPtr user_data);
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public static LogFunc SetDefaultHandler (LogFunc log_func)
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{
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if (native_handler == null)
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native_handler = new LogFuncNative (NativeCallback);
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LogFuncNative prev = g_log_set_default_handler (native_handler, (IntPtr) GCHandle.Alloc (log_func));
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if (prev == null)
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return null;
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Invoker invoker = new Invoker (prev);
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return invoker.Handler;
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}
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/*
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* Some common logging methods.
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*
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* Sample usage:
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*
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* // Print the messages for the NULL domain
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* LogFunc logFunc = new LogFunc (Log.PrintLogFunction);
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* Log.SetLogHandler (null, LogLevelFlags.All, logFunc);
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*
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* // Print messages and stack trace for Gtk critical messages
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* logFunc = new LogFunc (Log.PrintTraceLogFunction);
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* Log.SetLogHandler ("Gtk", LogLevelFlags.Critical, logFunc);
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*
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*/
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public static void PrintLogFunction (string domain, LogLevelFlags level, string message)
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{
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Console.WriteLine ("Domain: '{0}' Level: {1}", domain, level);
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Console.WriteLine ("Message: {0}", message);
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}
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public static void PrintTraceLogFunction (string domain, LogLevelFlags level, string message)
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{
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PrintLogFunction (domain, level, message);
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Console.WriteLine ("Trace follows:\n{0}", new System.Diagnostics.StackTrace ());
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}
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}
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}
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