osutils.cxx

mgcp协议源代码。支持多种编码：g711

/*
 * osutils.cxx
 *
 * Operating System utilities.
 *
 * Portable Windows Library
 *
 * Copyright (c) 1993-1998 Equivalence Pty. Ltd.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.0 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is Portable Windows Library.
 *
 * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
 *
 * Portions are Copyright (C) 1993 Free Software Foundation, Inc.
 * All Rights Reserved.
 *
 * Contributor(s): ______________________________________.
 *
 * $Log: osutils.cxx,v $
 * Revision 1.144  2000/06/26 11:17:20  robertj
 * Nucleus++ port (incomplete).
 *
 * Revision 1.143  2000/06/26 09:27:16  robertj
 * Added ability to get at the PTraceStream without timestamps etc, use UINT_MAX trace level.
 *
 * Revision 1.142  2000/06/02 01:38:07  craigs
 * Fixed typos
 *
 * Revision 1.141  2000/06/02 01:35:56  craigs
 * Added more guards for NULL PStrings in PConfigArg handling
 *
 * Revision 1.140  2000/05/25 14:45:07  robertj
 * Fixed detection of real argument over configured value.
 *
 * Revision 1.139  2000/05/25 13:47:51  robertj
 * Fixed warning with GNU.
 *
 * Revision 1.138  2000/05/25 11:05:55  robertj
 * Added PConfigArgs class so can save program arguments to config files.
 *
 * Revision 1.137  2000/05/05 10:08:29  robertj
 * Fixed some GNU compiler warnings
 *
 * Revision 1.136  2000/04/28 06:58:50  robertj
 * Fixed bug introduced when added Ashley Untts fix, forgot to take out old code!
 *
 * Revision 1.135  2000/04/27 04:19:27  robertj
 * Fixed bug in restarting free running timers, thanks Ashley Unitt.
 *
 * Revision 1.134  2000/04/03 18:42:40  robertj
 * Added function to determine if PProcess instance is initialised.
 *
 * Revision 1.133  2000/03/29 20:12:00  robertj
 * Fixed GNU C++ warning
 *
 * Revision 1.132  2000/03/29 01:55:52  robertj
 * Fixed infinite recursion on PProcess::Current() = NULL assertion.
 *
 * Revision 1.131  2000/03/02 05:43:12  robertj
 * Fixed handling of NULL pointer on current thread in PTRACE output.
 *
 * Revision 1.130  2000/02/29 12:26:14  robertj
 * Added named threads to tracing, thanks to Dave Harvey
 *
 * Revision 1.129  2000/02/17 11:34:28  robertj
 * Changed PTRACE output to help line up text after filename output.
 *
 * Revision 1.128  2000/01/06 14:09:42  robertj
 * Fixed problems with starting up timers,losing up to 10 seconds
 *
 * Revision 1.127  1999/10/19 09:21:30  robertj
 * Added functions to get current trace options and level.
 *
 * Revision 1.126  1999/10/14 08:08:27  robertj
 * Fixed problem, assuring millisecond accuracy in timestamp of trace output.
 *
 * Revision 1.125  1999/09/14 13:02:52  robertj
 * Fixed PTRACE to PSYSTEMLOG conversion problem under Unix.
 *
 * Revision 1.124  1999/09/13 13:15:07  robertj
 * Changed PTRACE so will output to system log in PServiceProcess applications.
 *
 * Revision 1.123  1999/08/22 12:54:35  robertj
 * Fixed warnings about inlines on older GNU compiler
 *
 * Revision 1.122  1999/06/23 14:19:46  robertj
 * Fixed core dump problem with SIGINT/SIGTERM terminating process.
 *
 * Revision 1.121  1999/06/14 07:59:38  robertj
 * Enhanced tracing again to add options to trace output (timestamps etc).
 *
 * Revision 1.120  1999/04/26 08:06:51  robertj
 * Added missing function in cooperative threading.
 *
 * Revision 1.119  1999/03/01 13:51:30  craigs
 * Fixed ugly little bug in the cooperative multithreading that meant that threads blocked
 * on timers didn't always get rescheduled.
 *
 * Revision 1.118  1999/02/23 10:13:31  robertj
 * Changed trace to only diplay filename and not whole path.
 *
 * Revision 1.117  1999/02/23 07:11:27  robertj
 * Improved trace facility adding trace levels and #define to remove all trace code.
 *
 * Revision 1.116  1998/11/30 12:45:54  robertj
 * Fissioned into pchannel.cxx and pconfig.cxx
 *
 * Revision 1.115  1998/11/24 01:17:33  robertj
 * Type discrepency between declaration and definition for PFile::SetPosition
 *
 * Revision 1.114  1998/11/06 02:37:53  robertj
 * Fixed the fix for semaphore timeout race condition.
 *
 * Revision 1.113  1998/11/03 10:52:19  robertj
 * Fixed bug in semaphores with timeout saying timed out when really signalled.
 *
 * Revision 1.112  1998/11/03 03:44:05  robertj
 * Fixed missng strings on multiple parameters of same letter.
 *
 * Revision 1.111  1998/11/02 10:13:01  robertj
 * Removed GNU warning.
 *
 * Revision 1.110  1998/11/01 04:56:53  robertj
 * Added BOOl return value to Parse() to indicate there are parameters available.
 *
 * Revision 1.109  1998/10/31 14:02:20  robertj
 * Removed StartImmediate capability as causes race condition in preemptive version.
 *
 * Revision 1.108  1998/10/31 12:47:10  robertj
 * Added conditional mutex and read/write mutex thread synchronisation objects.
 *
 * Revision 1.107  1998/10/30 12:24:15  robertj
 * Added ability to get all key values as a dictionary.
 * Fixed warnings in GNU C.
 *
 * Revision 1.106  1998/10/30 11:22:15  robertj
 * Added constructors that take strings as well as const char *'s.
 *
 * Revision 1.105  1998/10/30 05:25:09  robertj
 * Allow user to shift past some arguments before parsing for the first time.
 *
 * Revision 1.104  1998/10/29 05:35:17  robertj
 * Fixed porblem with GetCount() == 0 if do not call Parse() function.
 *
 * Revision 1.103  1998/10/28 03:26:43  robertj
 * Added multi character arguments (-abc style) and options precede parameters mode.
 *
 * Revision 1.102  1998/10/28 00:59:49  robertj
 * New improved argument parsing.
 *
 * Revision 1.101  1998/10/19 00:19:59  robertj
 * Moved error and trace stream functions to common code.
 *
 * Revision 1.100  1998/10/18 14:28:45  robertj
 * Renamed argv/argc to eliminate accidental usage.
 *
 * Revision 1.99  1998/10/13 14:06:28  robertj
 * Complete rewrite of memory leak detection code.
 *
 * Revision 1.98  1998/09/24 07:23:54  robertj
 * Moved structured fiel into separate module so don't need silly implementation file for GNU C.
 *
 * Revision 1.97  1998/09/23 06:22:24  robertj
 * Added open source copyright license.
 *
 * Revision 1.96  1998/06/13 15:11:56  robertj
 * Added stack check in Yield().
 * Added immediate schedule of semaphore timeout thread.
 *
 * Revision 1.95  1998/05/30 13:28:18  robertj
 * Changed memory check code so global statics are not included in leak check.
 * Fixed deadlock in cooperative threading.
 * Added PSyncPointAck class.
 *
 * Revision 1.94  1998/05/25 09:05:56  robertj
 * Fixed close of channels on destruction.
 *
 * Revision 1.93  1998/04/07 13:33:33  robertj
 * Changed startup code to support PApplication class.
 *
 * Revision 1.92  1998/03/29 06:16:45  robertj
 * Rearranged initialisation sequence so PProcess descendent constructors can do "things".
 *
 * Revision 1.91  1998/03/20 03:18:17  robertj
 * Added special classes for specific sepahores, PMutex and PSyncPoint.
 *
 * Revision 1.90  1998/02/05 13:33:12  robertj
 * Fixed close of non-autodelete PIndirectChannels
 *
 * Revision 1.89  1998/02/03 06:19:55  robertj
 * Added new function to read a block with minimum number of bytes.
 *
 * Revision 1.88  1998/01/26 00:47:13  robertj
 * Added functions to get/set 64bit integers from a PConfig.
 *
 * Revision 1.87  1998/01/04 07:22:16  robertj
 * Fixed bug in thread deletion not removing it from active thread list.
 *
 * Revision 1.86  1997/10/10 10:41:22  robertj
 * Fixed problem with cooperative threading and Sleep() function returning immediately.
 *
 * Revision 1.85  1997/08/28 12:49:00  robertj
 * Fixed possible assert on exit of application.
 *
 * Revision 1.84  1997/07/08 13:08:12  robertj
 * DLL support.
 *
 * Revision 1.83  1997/04/27 05:50:15  robertj
 * DLL support.
 *
 * Revision 1.82  1997/02/09 04:05:56  robertj
 * Changed PProcess::Current() from pointer to reference.
 *
 * Revision 1.81  1997/02/05 11:51:42  robertj
 * Changed current process function to return reference and validate objects descendancy.
 *
 * Revision 1.80  1996/12/21 05:54:38  robertj
 * Fixed possible deadlock in timers.
 *
 * Revision 1.79  1996/12/05 11:44:22  craigs
 * Made indirect close from different thread less likely to have
 * race condition
 *
 * Revision 1.78  1996/11/30 12:08:42  robertj
 * Removed extraneous compiler warning.
 *
 * Revision 1.77  1996/11/10 21:05:43  robertj
 * Fixed bug of missing flush in close of indirect channel.
 *
 * Revision 1.76  1996/10/08 13:07:07  robertj
 * Fixed bug in indirect channel being reopened double deleting subchannel.
 *
 * Revision 1.75  1996/09/14 13:09:37  robertj
 * Major upgrade:
 *   rearranged sockets to help support IPX.
 *   added indirect channel class and moved all protocols to descend from it,
 *   separating the protocol from the low level byte transport.
 *
 * Revision 1.74  1996/08/11 06:53:04  robertj
 * Fixed bug in Sleep() function (nonpreemptive version).
 *
 * Revision 1.73  1996/07/27 04:12:09  robertj
 * Fixed bug in timer thread going into busy loop instead of blocking.
 *
 * Revision 1.72  1996/07/15 10:36:12  robertj
 * Fixed bug in timer on startup, getting LARGE times timing out prematurely.
 *
 * Revision 1.71  1996/06/28 13:22:43  robertj
 * Rewrite of timers to make OnTimeout more thread safe.
 *
 * Revision 1.70  1996/06/13 13:31:05  robertj
 * Rewrite of auto-delete threads, fixes Windows95 total crash.
 *
 * Revision 1.69  1996/06/03 10:01:31  robertj
 * Fixed GNU support bug fix for the fix.
 *
 * Revision 1.68  1996/06/01 05:03:37  robertj
 * Fixed GNU compiler having difficulty with PTimeInterval *this.
 *
 * Revision 1.67  1996/05/26 03:46:56  robertj
 * Compatibility to GNU 2.7.x
 *
 * Revision 1.66  1996/05/23 23:05:07  robertj
 * Fixed process filename on MSOS platforms.
 *
 * Revision 1.65  1996/05/23 09:56:57  robertj
 * Added mutex to timer list.
 *
 * Revision 1.64  1996/05/18 09:18:33  robertj
 * Added mutex to timer list.
 *
 * Revision 1.63  1996/05/09 12:19:00  robertj
 * Resolved C++ problems with 64 bit PTimeInterval for Mac platform.
 *
 * Revision 1.62  1996/04/14 02:53:34  robertj
 * Split serial and pipe channel into separate compilation units for Linux executable size reduction.
 *
 * Revision 1.61  1996/04/10 12:51:29  robertj
 * Fixed startup race condtion in timer thread.
 *
 * Revision 1.60  1996/04/09 03:32:58  robertj
 * Fixed bug in config GetTime() cannot use PTime(0) in western hemisphere.
 *
 * Revision 1.59  1996/04/02 11:29:19  robertj
 * Eliminated printing of patch level in version when there isn't one.
 *
 * Revision 1.58  1996/03/31 09:06:14  robertj
 * Fixed WriteString() so works with sockets.
 * Changed PPipeSokcet argument string list to array.
 *
 * Revision 1.57  1996/03/16 04:51:50  robertj
 * Fixed yet another bug in the scheduler.
 *
 * Revision 1.56  1996/03/12 11:30:50  robertj
 * Moved PProcess destructor to platform dependent code.
 *
 * Revision 1.55  1996/03/05 14:05:51  robertj
 * Fixed some more bugs in scheduling.
 *
 * Revision 1.54  1996/03/04 12:22:46  robertj
 * Fixed threading for unix stack check and loop list start point.
 *
 * Revision 1.53  1996/03/03 07:39:51  robertj
 * Fixed bug in thread scheduler for correct termination of "current" thread.
 *
 * Revision 1.52  1996/03/02 03:24:48  robertj
 * Changed timer thread to update timers periodically, this allows timers to be
 *    views dynamically by other threads.
 * Added automatic deletion of thread object instances on thread completion.
 *
 * Revision 1.51  1996/02/25 11:15:27  robertj
 * Added platform dependent Construct function to PProcess.
 *
 * Revision 1.50  1996/02/25 03:09:46  robertj
 * Added consts to all GetXxxx functions in PConfig.
 *
 * Revision 1.49  1996/02/15 14:44:09  robertj
 * Used string constructor for PTime, more "efficient".
 *
 * Revision 1.48  1996/02/13 12:59:30  robertj
 * Changed GetTimeZone() so can specify standard/daylight time.
 * Split PTime into separate module after major change to ReadFrom().
 *
 * Revision 1.47  1996/02/08 12:26:55  robertj
 * Changed time for full support of time zones.
 *
 * Revision 1.46  1996/02/03 11:06:49  robertj
 * Added string constructor for times, parses date/time from string.
 *
 * Revision 1.45  1996/01/28 14:09:39  robertj
 * Fixed bug in time reading function for dates before 1980.
 * Fixed bug in time reading, was out by one month.
 * Added time functions to PConfig.
 *
 * Revision 1.44  1996/01/28 02:52:04  robertj
 * Added assert into all Compare functions to assure comparison between compatible objects.
 *
 * Revision 1.43  1996/01/23 13:16:30  robertj
 * Mac Metrowerks compiler support.
 * Fixed timers so background thread not created if a windows app.
 *
 * Revision 1.42  1996/01/03 23:15:39  robertj
 * Fixed some PTime bugs.
 *
 * Revision 1.41  1996/01/03 11:09:35  robertj
 * Added Universal Time and Time Zones to PTime class.
 *
 * Revision 1.39  1995/12/23 03:40:40  robertj
 * Changed version number system
 *
 * Revision 1.38  1995/12/10 11:41:12  robertj
 * Added extra user information to processes and applications.
 * Implemented timer support in text only applications with platform threads.
 * Fixed bug in non-platform threads and semaphore timeouts.
 *
 * Revision 1.37  1995/11/21 11:50:57  robertj
 * Added timeout on semaphore wait.
 *
 * Revision 1.36  1995/11/09 12:22:58  robertj
 * Fixed bug in stream when reading an FF (get EOF).
 *
 * Revision 1.35  1995/07/31 12:09:25  robertj
 * Added semaphore class.
 * Removed PContainer from PChannel ancestor.
 *
 * Revision 1.34  1995/06/04 12:41:08  robertj
 * Fixed bug in accessing argument strings with no argument.
 *
 * Revision 1.33  1995/04/25 11:30:06  robertj
 * Fixed Borland compiler warnings.
 *
 * Revision 1.32  1995/04/22 00:51:00  robertj
 * Changed file path strings to use PFilePath object.
 * Changed semantics of Rename().
 *
 * Revision 1.31  1995/04/02 09:27:31  robertj
 * Added "balloon" help.
 *
 * Revision 1.30  1995/04/01 08:30:58  robertj
 * Fixed bug in timeout code of timers.
 *
 * Revision 1.29  1995/01/27 11:15:17  robertj
 * Removed enum to int warning from GCC.
 *
 * Revision 1.28  1995/01/18  09:02:43  robertj
 * Added notifier to timer.
 *
 * Revision 1.27  1995/01/15  04:57:15  robertj
 * Implemented PTime::ReadFrom.
 * Fixed flush of iostream at end of file.
 *
 * Revision 1.26  1995/01/11  09:45:14  robertj
 * Documentation and normalisation.
 *
 * Revision 1.25  1995/01/10  11:44:15  robertj
 * Removed PString parameter in stdarg function for GNU C++ compatibility.
 *
 * Revision 1.24  1995/01/09  12:31:51  robertj
 * Removed unnecesary return value from I/O functions.
 *
 * Revision 1.23  1994/12/12  10:09:24  robertj
 * Fixed flotain point configuration variable format.
 *
 * Revision 1.22  1994/11/28  12:38:23  robertj
 * Async write functions should have const pointer.
 *
 * Revision 1.21  1994/10/30  11:36:58  robertj
 * Fixed missing space in tine format string.
 *
 * Revision 1.20  1994/10/23  03:46:41  robertj
 * Shortened OS error assert.
 *
 * Revision 1.19  1994/09/25  10:51:04  robertj
 * Fixed error conversion code to use common function.
 * Added pipe channel.
 *
 * Revision 1.18  1994/08/21  23:43:02  robertj
 * Moved meta-string transmitter from PModem to PChannel.
 * Added SuspendBlock state to cooperative multi-threading to fix logic fault.
 * Added "force" option to Remove/Rename etc to override write protection.
 * Added common entry point to convert OS error to PChannel error.
 *
 * Revision 1.17  1994/08/04  12:57:10  robertj
 * Changed CheckBlock() to better name.
 * Moved timer porcessing so is done at every Yield().
 *
 * Revision 1.16  1994/08/01  03:39:42  robertj
 * Fixed temporary variable problem with GNU C++
 *
 * Revision 1.15  1994/07/27  05:58:07  robertj
 * Synchronisation.
 *
 * Revision 1.14  1994/07/25  03:39:22  robertj
 * Fixed problems with C++ temporary variables.
 *
 * Revision 1.13  1994/07/21  12:33:49  robertj
 * Moved cooperative threads to common.
 *
 * Revision 1.12  1994/07/17  10:46:06  robertj
 * Fixed timer bug.
 * Moved handle from file to channel.
 * Changed args to use container classes.
 *
 * Revision 1.11  1994/07/02  03:03:49  robertj
 * Time interval and timer redesign.
 *
 * Revision 1.10  1994/06/25  11:55:15  robertj
 * Unix version synchronisation.
 *
 * Revision 1.9  1994/04/20  12:17:44  robertj
 * assert changes
 *
 * Revision 1.8  1994/04/01  14:05:06  robertj
 * Text file streams
 *
 * Revision 1.7  1994/03/07  07:47:00  robertj
 * Major upgrade
 *
 * Revision 1.6  1994/01/03  04:42:23  robertj
 * Mass changes to common container classes and interactors etc etc etc.
 *
 * Revision 1.5  1993/12/31  06:53:02  robertj
 * Made inlines optional for debugging purposes.
 *
 * Revision 1.4  1993/12/29  04:41:26  robertj
 * Mac port.
 *
 * Revision 1.3  1993/11/20  17:26:28  robertj
 * Removed separate osutil.h
 *
 * Revision 1.2  1993/08/31  03:38:02  robertj
 * G++ needs explicit casts for char * / void * interchange.
 *
 * Revision 1.1  1993/08/27  18:17:47  robertj
 * Initial revision
 *
 */

#include <ptlib.h>
#include <ptlib/svcproc.h>

#include <ctype.h>


#ifndef __NUCLEUS_PLUS__
static ostream * PErrorStream = &cerr;
#else
static ostream * PErrorStream = 0L;
#endif

ostream & PGetErrorStream()
{
  return *PErrorStream;
}


void PSetErrorStream(ostream * s)
{
#ifndef __NUCLEUS_PLUS__
  PErrorStream = s != NULL ? s : &cerr;
#else
  PErrorStream = s;
#endif
}


///////////////////////////////////////////////////////////////////////////////

#ifndef __NUCLEUS_PLUS__
static ostream * PTraceStream = &cerr;
#else
static ostream * PTraceStream = 0L;
#endif
static unsigned PTraceOptions = PTrace::FileAndLine;
static unsigned PTraceLevelThreshold = 0;