missing.cpp

贡献一份commoncpp2,有兴趣的可以研究一下

// Copyright (C) 2001-2005 Open Source Telecom Corporation.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software 
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// 
// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however    
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.    
//
// This exception applies only to the code released under the name GNU
// Common C++.  If you copy code from other releases into a copy of GNU
// Common C++, as the General Public License permits, the exception does
// not apply to the code that you add in this way.  To avoid misleading
// anyone as to the status of such modified files, you must delete
// this exception notice from them.
//
// If you write modifications of your own for GNU Common C++, it is your choice
// whether to permit this exception to apply to your modifications.
// If you do not wish that, delete this exception notice.
//

#include <cc++/config.h>
#include <cc++/export.h>
#include <cc++/strchar.h>

#include <cstdio>
#include <cstdlib>
#include <cstring>

#ifdef	WIN32
#ifndef	_WIN32_WCE
#include <sys/timeb.h>
#endif
#else

#ifdef  HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#ifdef  HAVE_SYS_FILE_H
#include <sys/file.h>
#endif

#ifdef  HAVE_SYS_LOCKF_H
#include <sys/lockf.h>
#endif

#ifdef	COMMON_AIX_FIXES
#undef	LOCK_EX
#undef	LOCK_SH
#endif

#ifndef F_LOCK
#define MISSING_LOCKF

enum
{
        F_ULOCK = 1,
        F_LOCK,
        F_TLOCK,
        F_TEST
};
#endif

#endif

#ifdef	CCXX_NAMESPACES
namespace ost {
using namespace std;
#endif

#ifdef	WIN32
#ifdef	_WIN32_WCE
int gettimeofday(struct timeval *tv_,  void *tz_)
{
        // We could use _ftime(), but it is not available on WinCE.
        // (WinCE also lacks time.h)
        // Note also that the average error of _ftime is around 20 ms :)
        DWORD ms = GetTickCount();
        tv_->tv_sec = ms / 1000;
        tv_->tv_usec = ms * 1000;
        return 0;
}
#else

int gettimeofday(struct timeval *tv_, void *tz_)
{
#if defined(_MSC_VER) && _MSC_VER >= 1300
	struct __timeb64 tb;
	_ftime64(&tb);
#else
# ifndef __BORLANDC__
	struct _timeb tb;
	_ftime(&tb);
# else
	struct timeb tb;
	ftime(&tb);
# endif
#endif
	tv_->tv_sec = (long)tb.time;
	tv_->tv_usec = tb.millitm * 1000;
	return 0;
}	
#endif
#endif

#ifndef	WIN32
#ifdef	HAVE_GETTIMEOFDAY

unsigned long getTicks(void)
{
	unsigned long ticks;

        struct timeval now;
        gettimeofday(&now, NULL);
        ticks = now.tv_sec * 1000l;
        ticks += now.tv_usec / 1000l;
        return ticks;
}

#endif
#else

DWORD getTicks(void)
{
	return GetTickCount();
}

#endif

#ifndef	HAVE_STRDUP
char *strdup(const char *str)
{
	if(!str)
		return NULL;

	size_t len = strlen(str) + 1;
	char *dest = (char *)malloc(len);

	if(!dest)
		return NULL;

	return setString(dest, len, str);
}
#endif

#ifndef	HAVE_MEMMOVE
void *memmove (char *dest, const char *source, size_t length)
{
	char *save = dest;
  	if (source < dest)
	{
    		for (source += length, dest += length; length; --length)
      			*--dest = *--source;
	}
  	else if (source != dest)
    	{
      		for (; length; --length)
			*dest++ = *source++;
    	}
  	return (void *) save;
}
#endif

#ifndef	HAVE_LOCKF
int lockf(int fd, int cmd, long len)
{
        struct  flock lck;

        lck.l_start = 0l;
        lck.l_whence = SEEK_CUR;
        lck.l_len = len;

        switch(cmd)
        {
        case F_ULOCK:
                lck.l_type = F_UNLCK;
                return fcntl(fd, F_SETLK, &lck);
        case F_LOCK:
                lck.l_type = F_WRLCK;
                return fcntl(fd, F_SETLKW, &lck);
        case F_TLOCK:
                lck.l_type = F_WRLCK;
                return fcntl(fd, F_SETLK, &lck);
        case F_TEST:
                lck.l_type = F_WRLCK;
                fcntl(fd, F_GETLK, &lck);
                if(lck.l_type == F_UNLCK)
                        return 0;
                return -1;
        }
}
#endif



#ifdef	CCXX_NAMESPACES
}
#endif