syslog.c

基于ADI BLACKFIN的jbig压缩和解压缩程序

/*
 *  TOPPERS/JSP Kernel
 *      Toyohashi Open Platform for Embedded Real-Time Systems/
 *      Just Standard Profile Kernel
 * 
 *  Copyright (C) 2000-2003 by Embedded and Real-Time Systems Laboratory
 *                              Toyohashi Univ. of Technology, JAPAN
 * 
 *  忋婰挊嶌尃幰偼丆埲壓偺 (1)乣(4) 偺忦審偐丆Free Software Foundation 
 *  偵傛偭偰岞昞偝傟偰偄傞 GNU General Public License 偺 Version 2 偵婰
 *  弎偝傟偰偄傞忦審傪枮偨偡応崌偵尷傝丆杮僜僼僩僂僃傾乮杮僜僼僩僂僃傾
 *  傪夵曄偟偨傕偺傪娷傓丏埲壓摨偠乯傪巊梡丒暋惢丒夵曄丒嵞攝晍乮埲壓丆
 *  棙梡偲屇傇乯偡傞偙偲傪柍彏偱嫋戻偡傞丏
 *  (1) 杮僜僼僩僂僃傾傪僜乕僗僐乕僪偺宍偱棙梡偡傞応崌偵偼丆忋婰偺挊嶌
 *      尃昞帵丆偙偺棙梡忦審偍傛傃壓婰偺柍曐徹婯掕偑丆偦偺傑傑偺宍偱僜乕
 *      僗僐乕僪拞偵娷傑傟偰偄傞偙偲丏
 *  (2) 杮僜僼僩僂僃傾傪丆儔僀僽儔儕宍幃側偳丆懠偺僜僼僩僂僃傾奐敪偵巊
 *      梡偱偒傞宍偱嵞攝晍偡傞応崌偵偼丆嵞攝晍偵敽偆僪僉儏儊儞僩乮棙梡
 *      幰儅僯儏傾儖側偳乯偵丆忋婰偺挊嶌尃昞帵丆偙偺棙梡忦審偍傛傃壓婰
 *      偺柍曐徹婯掕傪宖嵹偡傞偙偲丏
 *  (3) 杮僜僼僩僂僃傾傪丆婡婍偵慻傒崬傓側偳丆懠偺僜僼僩僂僃傾奐敪偵巊
 *      梡偱偒側偄宍偱嵞攝晍偡傞応崌偵偼丆師偺偄偢傟偐偺忦審傪枮偨偡偙
 *      偲丏
 *    (a) 嵞攝晍偵敽偆僪僉儏儊儞僩乮棙梡幰儅僯儏傾儖側偳乯偵丆忋婰偺挊
 *        嶌尃昞帵丆偙偺棙梡忦審偍傛傃壓婰偺柍曐徹婯掕傪宖嵹偡傞偙偲丏
 *    (b) 嵞攝晍偺宍懺傪丆暿偵掕傔傞曽朄偵傛偭偰丆TOPPERS僾儘僕僃僋僩偵
 *        曬崘偡傞偙偲丏
 *  (4) 杮僜僼僩僂僃傾偺棙梡偵傛傝捈愙揑傑偨偼娫愙揑偵惗偠傞偄偐側傞懝
 *      奞偐傜傕丆忋婰挊嶌尃幰偍傛傃TOPPERS僾儘僕僃僋僩傪柶愑偡傞偙偲丏
 * 
 *  杮僜僼僩僂僃傾偼丆柍曐徹偱採嫙偝傟偰偄傞傕偺偱偁傞丏忋婰挊嶌尃幰偍
 *  傛傃TOPPERS僾儘僕僃僋僩偼丆杮僜僼僩僂僃傾偵娭偟偰丆偦偺揔梡壜擻惈傕
 *  娷傔偰丆偄偐側傞曐徹傕峴傢側偄丏傑偨丆杮僜僼僩僂僃傾偺棙梡偵傛傝捈
 *  愙揑傑偨偼娫愙揑偵惗偠偨偄偐側傞懝奞偵娭偟偰傕丆偦偺愑擟傪晧傢側偄丏
 * 
 *  @(#) $Id: syslog.c,v 1.9 2003/06/04 01:46:16 hiro Exp $
 */

/*
 *	僔僗僥儉儘僌婡擻
 */

#undef OMIT_SYSLOG
#include "jsp_kernel.h"
#include "time_event.h"
#include "syslog.h"

/*
 *  僐儞僥僉僗僩偵埶傜側偄CPU儘僢僋乛儘僢僋夝彍
 */
#define	lock_cpu()	(sense_context() ? i_lock_cpu() : t_lock_cpu())
#define	unlock_cpu()	(sense_context() ? i_unlock_cpu() : t_unlock_cpu())

#ifdef __logini

/*
 *  儘僌僶僢僼傽偲偦傟偵傾僋僙僗偡傞偨傔偺億僀儞僞
 */
SYSLOG	syslog_buffer[TCNT_SYSLOG_BUFFER];	/* 儘僌僶僢僼傽 */
UINT	syslog_count;			/* 儘僌僶僢僼傽拞偺儘僌偺悢 */
UINT	syslog_head;			/* 愭摢偺儘僌偺奿擺埵抲 */
UINT	syslog_tail;			/* 師偺儘僌偺奿擺埵抲 */
UINT	syslog_lost;			/* 幐傢傟偨儘僌偺悢 */

/*
 *  弌椡偡傋偒儘僌忣曬偺廳梫搙乮價僢僩儅僢僾乯
 */
UINT	syslog_logmask;			/* 儘僌僶僢僼傽偵婰榐偡傋偒廳梫搙 */
UINT	syslog_lowmask;			/* 掅儗儀儖弌椡偡傋偒廳梫搙 */

/*
 *  僔僗僥儉儘僌婡擻偺弶婜壔
 */
void
syslog_initialize()
{
	syslog_count = 0;
	syslog_head = syslog_tail = 0;
	syslog_lost = 0;

	syslog_logmask = 0;
	syslog_lowmask = LOG_UPTO(LOG_NOTICE);
}     

#endif /* __logini */

/* 
 *  儘僌忣曬偺弌椡
 *
 *  CPU儘僢僋忬懺傗幚峴僐儞僥僉僗僩偵傛傜偢摦嶌偱偒傞傛偆偵幚憰偟偰偁傞丏
 */
#ifdef __vwri_log

SYSCALL ER
vwri_log(UINT prio, SYSLOG *p_log)
{
	BOOL	locked;

	locked = sense_lock();
	if (!locked) {
		lock_cpu();
	}

	/*
	 *  儘僌帪崗偺愝掕
	 */
	p_log->logtim = systim_offset + current_time;

	/*
	 *  儘僌僶僢僼傽偵婰榐
	 */
	if ((syslog_logmask & LOG_MASK(prio)) != 0) {
		syslog_buffer[syslog_tail] = *p_log;
		syslog_tail++;
		if (syslog_tail >= TCNT_SYSLOG_BUFFER) {
			syslog_tail = 0;
		}
		if (syslog_count < TCNT_SYSLOG_BUFFER) {
			syslog_count++;
		}
		else {
			syslog_head = syslog_tail;
			syslog_lost++;
		}
	}

	/*
	 *  掅儗儀儖弌椡
	 */
	if ((syslog_lowmask & LOG_MASK(prio)) != 0) {
		syslog_print(p_log, sys_putc);
	}

	if (!locked) {
		unlock_cpu();
	}
	return(E_OK);
}

#endif /* __vwri_log */

/*
 *  儘僌僶僢僼傽偐傜偺撉弌偟
 *
 *  CPU儘僢僋忬懺傗幚峴僐儞僥僉僗僩偵傛傜偢摦嶌偱偒傞傛偆偵幚憰偟偰偁傞丏
 */
#ifdef __vrea_log

SYSCALL ER_UINT
vrea_log(SYSLOG *p_log)
{
	BOOL	locked;
	ER_UINT	ercd;

	locked = sense_lock();
	if (!locked) {
		lock_cpu();
	}
	if (syslog_count > 0) {
		*p_log = syslog_buffer[syslog_head];
		syslog_count--;
		syslog_head++;
		if (syslog_head >= TCNT_SYSLOG_BUFFER) {
			syslog_head = 0;
		}
		ercd = (ER_UINT) syslog_lost;
		syslog_lost = 0;
	}
	else {
		ercd = E_OBJ;
	}
	if (!locked) {
		unlock_cpu();
	}
	return(ercd);
}

#endif /* __vrea_log */

/* 
 *  弌椡偡傋偒儘僌忣曬偺廳梫搙偺愝掕
 */
#ifdef __vmsk_log

SYSCALL ER
vmsk_log(UINT logmask, UINT lowmask)
{
	syslog_logmask = logmask;
	syslog_lowmask = lowmask;
	return(E_OK);
}

#endif /* __vmsk_log */

/* 
 *  僔僗僥儉儘僌婡擻偺廔椆張棟
 *
 *  儘僌僶僢僼傽偵婰榐偝傟偨儘僌忣曬傪丆掅儗儀儖弌椡婡擻傪梡偄偰弌椡偡
 *  傞丏
 */
#ifdef __logter

void
syslog_terminate()
{
	syslog_printf("-- buffered messages --", NULL, sys_putc);
	syslog_output(sys_putc);
}

#endif /* __logter */