perf.~h

lWIP是TCPIP的协议的源代码。采用的是最新LWIP0.6.4版本。为了得到最佳性能

/*
 * Copyright (c) 2001, Swedish Institute of Computer Science.
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 * 3. Neither the name of the Institute nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE. 
 *
 * This file is part of the lwIP TCP/IP stack.
 * 
 * Author: Adam Dunkels <[e-mail]>
 *
 * $Id: perf.h,v 1.2 2001/12/14 20:13:44 adam Exp $
 */
#ifndef __ARCH_PERF_H__
#define __ARCH_PERF_H__

#include <sys/times.h>

#ifdef PERF
#define PERF_START  { \
                         unsigned long __c1l, __c1h, __c2l, __c2h; \
                         __asm__(".byte 0x0f, 0x31" : "=a" (__c1l), "=d" (__c1h))
#define PERF_STOP(x)   __asm__(".byte 0x0f, 0x31" : "=a" (__c2l), "=d" (__c2h)); \
                       perf_print(__c1l, __c1h, __c2l, __c2h, x);}

/*#define PERF_START do { \
                     struct tms __perf_start, __perf_end; \
                     times(&__perf_start)
#define PERF_STOP(x) times(&__perf_end); \
                     perf_print_times(&__perf_start, &__perf_end, x);\
                     } while(0)*/
#else /* PERF */
#define PERF_START    /* null definition */
#define PERF_STOP(x)  /* null definition */
#endif /* PERF */

void perf_print(unsigned long c1l, unsigned long c1h,
		unsigned long c2l, unsigned long c2h,
		char *key);

void perf_print_times(struct tms *start, struct tms *end, char *key);

void perf_init(char *fname);

#endif /* __ARCH_PERF_H__ */