repos_main/log4cproj_c/Log4C/appender.c

static const char version[] = "1.2.1";

/*
* appender.c
*
* Copyright 2001-2003, Meiosys (www.meiosys.com). All rights reserved.
*
* See the COPYING file for the terms of usage and distribution.
*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <log4c/appender.h>
#include <log4c/appender_type_stream.h>
#include <string.h>
#include <sd/error.h>
#include <sd/malloc.h>
#include <sd/factory.h>
#include <sd/hash.h>
#include <sd/sd_xplatform.h>

struct __log4c_appender
{
	char*							app_name;
	const log4c_layout_t*			app_layout;
	const log4c_appender_type_t*	app_type;
	int								app_isopen;
	void*							app_udata;
};

sd_factory_t* log4c_appender_factory = NULL;

//////////////////////////////////////////////////////////////////////////
///以下为jesse修改的代码，将原有代码用#if 0...#endif注释掉
// 为解决log4c_layout_types中内存泄漏而将静态局部变量提升为全局局部变量 [9/8/2008 jesse]
static sd_hash_t* gs_types = NULL;

static sd_hash_t* log4c_appender_types(void)
{
	///static sd_hash_t* types = NULL;	
	if (!gs_types)
		gs_types = sd_hash_new(20, NULL);

	return gs_types;
}

/** 删除本appender.c文件中定义的全局和静态的指针指向的内存,防止内存泄漏
如：
1.gs_types.
2.
@return void.
作者：jesse 日期:2008.09.08
*/
extern void log4c_appender_delete_global()
{
	if (NULL != gs_types)
	{
		sd_hash_delete(gs_types);
		gs_types = NULL;
	}
}

//////////////////////////////////////////////////////////////////////////
#if 0
/**
* @bug log4c_appender_type hash is not freed in destructor
*/

/*******************************************************************************/
static sd_hash_t* log4c_appender_types(void)
{
	static sd_hash_t* types = NULL;

	if (!types)
		types = sd_hash_new(20, NULL);

	return types;
}
#endif

extern void log4c_appender_types_print(FILE *fp)
{
	sd_hash_iter_t* i;

	fprintf(fp, "appender types:");
	for (i = sd_hash_begin(log4c_appender_types());
		i != sd_hash_end(log4c_appender_types()); 
		i = sd_hash_iter_next(i) ) 
	{
		fprintf(fp, "'%s' ",((log4c_appender_type_t *)(i->data))->name );
	}
	fprintf(fp, "\n");
}

/*******************************************************************************/
extern const log4c_appender_type_t* log4c_appender_type_get(const char* a_name)
{
	sd_hash_iter_t* i;

	if (!a_name)
		return NULL;

	if ( (i = sd_hash_lookup(log4c_appender_types(), a_name)) != NULL)
		return (log4c_appender_type_t*)i->data;

	return NULL;
}

/*******************************************************************************/
extern const log4c_appender_type_t* log4c_appender_type_set(const log4c_appender_type_t* a_type)
{
	sd_hash_iter_t* i = NULL;
	void* previous = NULL;

	if (!a_type)
		return NULL;

	if ( (i = sd_hash_lookadd(log4c_appender_types(), a_type->name)) == NULL)
		return NULL;

	previous = i->data;
	i->data  = (void*) a_type;

	return (log4c_appender_type_t*)previous;
}

/*******************************************************************************/
extern log4c_appender_t* log4c_appender_get(const char* a_name)
{
	static const sd_factory_ops_t log4c_appender_factory_ops = {
		/*(void*) log4c_appender_new,
		(void*) log4c_appender_delete,
		(void*) log4c_appender_print,*/
		(void *( *)(const char *))log4c_appender_new,
		(void ( *)(void *))log4c_appender_delete,
		(void ( *)(void *,FILE *))log4c_appender_print
	};

	if (!log4c_appender_factory) {
		log4c_appender_factory = sd_factory_new("log4c_appender_factory", 
			&log4c_appender_factory_ops);

		/* build default appenders */
		log4c_appender_set_udata(log4c_appender_get("stderr"), stderr);
		log4c_appender_set_udata(log4c_appender_get("stdout"), stdout);
	}

	return (log4c_appender_t *)sd_factory_get(log4c_appender_factory, a_name);
}

/*******************************************************************************/
extern log4c_appender_t* log4c_appender_new(const char* a_name)
{
	log4c_appender_t* ptrThis;

	if (!a_name)
		return NULL;

	ptrThis	     = (log4c_appender_t*)sd_calloc(1, sizeof(log4c_appender_t));
	ptrThis->app_name   = sd_strdup(a_name);
	ptrThis->app_type   = &log4c_appender_type_stream;
	ptrThis->app_layout = log4c_layout_get("basic");
	ptrThis->app_isopen = 0;
	ptrThis->app_udata  = NULL;
	return ptrThis;
}

/*******************************************************************************/
extern void log4c_appender_delete(log4c_appender_t* ptrThis)
{
	sd_debug("log4c_appender_delete['%s'", 
		(ptrThis && ptrThis->app_name ? ptrThis->app_name: "(no name)"));
	if (!ptrThis){
		goto log4c_appender_delete_exit;
	}

	log4c_appender_close(ptrThis);
	if (ptrThis->app_name){
		free(ptrThis->app_name);  
	}
	free(ptrThis);

log4c_appender_delete_exit:
	sd_debug("]");
}

/*******************************************************************************/
extern const char* log4c_appender_get_name(const log4c_appender_t* ptrThis)
{
	return (ptrThis ? ptrThis->app_name : "(nil)");
}

/*******************************************************************************/
extern const log4c_appender_type_t* log4c_appender_get_type(const log4c_appender_t* ptrThis)
{
	return (ptrThis ? ptrThis->app_type : NULL);
}

/*******************************************************************************/
extern const log4c_layout_t* log4c_appender_get_layout(const log4c_appender_t* ptrThis)
{
	return (ptrThis ? ptrThis->app_layout : NULL);
}

/*******************************************************************************/
extern void* log4c_appender_get_udata(const log4c_appender_t* ptrThis)
{
	return (ptrThis ? ptrThis->app_udata : NULL);
}

/*******************************************************************************/
extern const log4c_appender_type_t* log4c_appender_set_type(log4c_appender_t* ptrThis,const log4c_appender_type_t*	a_type)
{
	const log4c_appender_type_t* previous;

	if (!ptrThis)
		return NULL;

	previous = ptrThis->app_type;
	ptrThis->app_type = a_type;
	return previous;
}

/*******************************************************************************/
extern const log4c_layout_t* log4c_appender_set_layout(log4c_appender_t*	ptrThis, const log4c_layout_t* a_layout)
{
	const log4c_layout_t* previous;

	if (!ptrThis)
		return NULL;

	previous = ptrThis->app_layout;
	ptrThis->app_layout = a_layout;
	return previous;
}

/*******************************************************************************/
extern void* log4c_appender_set_udata(log4c_appender_t* ptrThis, void* a_udata)
{
	void* previous;

	if (!ptrThis)
		return NULL;

	previous = ptrThis->app_udata;
	ptrThis->app_udata = a_udata;
	return previous;
}

/*******************************************************************************/
extern int log4c_appender_open(log4c_appender_t* ptrThis)
{
	int rc = 0;

	if (!ptrThis)
		return -1;

	if (ptrThis->app_isopen)
		return 0;

	if (!ptrThis->app_type)
		return 0;

	if (!ptrThis->app_type->open)
		return 0;

	if (ptrThis->app_type->open(ptrThis) == -1){
		rc = -1;
	}
	if (!rc) {
		ptrThis->app_isopen++;
	}

	return rc;
}

/**
* @bug is this the right place to open an appender ? 
*/

/*******************************************************************************/
extern int log4c_appender_append(log4c_appender_t* ptrThis, log4c_logging_event_t*	a_event)
{
	if (!ptrThis)
		return -1;

	if (!ptrThis->app_type)
		return 0;

	if (!ptrThis->app_type->append)
		return 0;

	if (!ptrThis->app_isopen)
		if (log4c_appender_open(ptrThis) == -1)
			return -1;

	if ( (a_event->evt_rendered_msg = 
		log4c_layout_format(ptrThis->app_layout, a_event)) == NULL)
		a_event->evt_rendered_msg = a_event->evt_msg;

	return ptrThis->app_type->append(ptrThis, a_event);
}

/*******************************************************************************/
extern int log4c_appender_append_no_file_num_no_layout(log4c_appender_t* ptrThis, log4c_logging_event_t*	a_event)
{
	if (!ptrThis)
		return -1;

	if (!ptrThis->app_type)
		return 0;

	if (!ptrThis->app_type->append)
		return 0;

	if (!ptrThis->app_isopen)
		if (log4c_appender_open(ptrThis) == -1)
			return -1;

#if 0
	if ( (a_event->evt_rendered_msg = 
		log4c_layout_format(ptrThis->app_layout, a_event)) == NULL)
		a_event->evt_rendered_msg = a_event->evt_msg;
#else
	a_event->evt_rendered_msg = a_event->evt_msg;
#endif

	return ptrThis->app_type->append(ptrThis, a_event);
}

/*******************************************************************************/
extern int log4c_appender_close(log4c_appender_t* ptrThis)
{
	if (!ptrThis)
		return -1;

	if (!ptrThis->app_isopen)
		return 0;

	if (!ptrThis->app_type)
		return 0;

	if (!ptrThis->app_type->close)
		return 0;

	if (ptrThis->app_type->close(ptrThis) == -1)
		return -1;

	ptrThis->app_isopen--;
	return 0;
}

/*******************************************************************************/
extern void log4c_appender_print(const log4c_appender_t* ptrThis, FILE* a_stream)
{
	if (!ptrThis) 
		return;

	fprintf(a_stream, "{ name:'%s' type:'%s' layout:'%s' isopen:%d udata:%p}",
		ptrThis->app_name, 
		ptrThis->app_type ? ptrThis->app_type->name : "(not set)",
		log4c_layout_get_name(ptrThis->app_layout),
		ptrThis->app_isopen, 
		ptrThis->app_udata);
}