fixed one bug in dbuf; add dbuf samples

lib_acl_cpp/changes.txt

@@ -4,6 +4,7 @@
 374) 2015.11.12
 374.1) feature: http_request_manager 的构造函数增加了连接 http 服务器的超时时间
 及 IO 读写超时时间
+374.2) bugfix: 修复了 dbuf_obj 构造函数中的 BUG，应该首先将 nrefer_ 初始化为 0
 
 373) 2015.11.11
 373.1) bugfix: mail_message 类中的 append_addrs 方法存在一处指针溢出的 BUG

lib_acl_cpp/samples/Makefile

@@ -45,6 +45,7 @@ all:
 	@(cd socket; make)
 	@(cd db; make)
 	@(cd redis; make)
+	@(cd dbuf; make)
 
 clean:
 	@(cd string; make clean)
@@ -93,5 +94,6 @@ clean:
 	@(cd socket; make clean)
 	@(cd db; make clean)
 	@(cd redis; make clean)
+	@(cd dbuf; make clean)
 
 rebuild rb: clean all

lib_acl_cpp/samples/dbuf/Makefile

@@ -1,5 +1,11 @@
-UTIL = $(wildcard ../*.cpp)
-base_path = ../..
-PROG = dbuf
-CFLAGS += -I../
-include ../Makefile.in
+.PHONY = all clean
+
+all:
+	@(cd dbuf1; make)
+	@(cd dbuf2; make)
+	@(cd dbuf3; make)
+
+clean:
+	@(cd dbuf1; make clean)
+	@(cd dbuf2; make clean)
+	@(cd dbuf3; make clean)

lib_acl_cpp/samples/dbuf/dbuf1/Makefile

@@ -0,0 +1,3 @@
+base_path = ../../..
+PROG = dbuf
+include ../../Makefile.in

lib_acl_cpp/samples/dbuf/dbuf2/Makefile

@@ -0,0 +1,3 @@
+base_path = ../../..
+PROG = dbuf
+include ../../Makefile.in

lib_acl_cpp/samples/dbuf/dbuf2/main.cpp

@@ -0,0 +1,58 @@
+// xml.cpp : 定义控制台应用程序的入口点。
+//
+#include "stdafx.h"
+#include <sys/time.h>
+
+class myobj : public acl::dbuf_obj
+{
+public:
+	myobj(acl::dbuf_guard* guard) : dbuf_obj(guard)
+	{
+		ptr_ = strdup("hello");
+	}
+
+	void run()
+	{
+		printf("----> hello world <-----\r\n");
+	}
+
+private:
+	char* ptr_;
+
+	~myobj()
+	{
+		free(ptr_);
+		printf("----> myobj destroied <-----\r\n");
+	}
+};
+
+int main(void)
+{
+	acl::log::stdout_open(true);
+
+	acl::dbuf_guard dbuf;
+
+	for (int i = 0; i < 102400; i++)
+		dbuf.dbuf_alloc(10);
+
+	dbuf.dbuf_alloc(1024);
+	dbuf.dbuf_alloc(1024);
+	dbuf.dbuf_alloc(2048);
+	dbuf.dbuf_alloc(1024);
+	dbuf.dbuf_alloc(1024);
+	dbuf.dbuf_alloc(1024);
+	dbuf.dbuf_alloc(1024);
+	dbuf.dbuf_alloc(1024);
+	dbuf.dbuf_alloc(1024);
+	dbuf.dbuf_alloc(1024);
+	dbuf.dbuf_alloc(1024);
+	dbuf.dbuf_alloc(10240);
+
+	for (int i = 0; i < 10; i++)
+	{
+		myobj* obj = new (dbuf.dbuf_alloc(sizeof(myobj))) myobj(&dbuf);
+		obj->run();
+	}
+
+	return 0;
+}

lib_acl_cpp/samples/dbuf/dbuf2/valgrind.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+valgrind --tool=memcheck --leak-check=yes  -v ./dbuf

lib_acl_cpp/samples/dbuf/dbuf3/Makefile

@@ -0,0 +1,3 @@
+base_path = ../../..
+PROG = dbuf
+include ../../Makefile.in

lib_acl_cpp/samples/dbuf/dbuf3/stdafx.cpp

@@ -0,0 +1,8 @@
+// stdafx.cpp : 只包括标准包含文件的源文件
+// xml.pch 将成为预编译头
+// stdafx.obj 将包含预编译类型信息
+
+#include "stdafx.h"
+
+// TODO: 在 STDAFX.H 中
+//引用任何所需的附加头文件，而不是在此文件中引用

lib_acl_cpp/samples/dbuf/dbuf3/stdafx.h

@@ -0,0 +1,13 @@
+// stdafx.h : 标准系统包含文件的包含文件，
+// 或是常用但不常更改的项目特定的包含文件
+//
+
+#pragma once
+
+//
+//#include <iostream>
+//#include <tchar.h>
+
+// TODO: 在此处引用程序要求的附加头文件
+#include "acl_cpp/lib_acl.hpp"
+#include "lib_acl.h"

lib_acl_cpp/samples/dbuf3/Makefile

@@ -1,5 +0,0 @@
-UTIL = $(wildcard ../*.cpp)
-base_path = ../..
-PROG = dbuf
-CFLAGS += -I../
-include ../Makefile.in

lib_acl_cpp/src/stdlib/dbuf_pool.cpp

@@ -89,14 +89,10 @@ bool dbuf_pool::dbuf_unkeep(const void* addr)
 //////////////////////////////////////////////////////////////////////////////
 
 dbuf_obj::dbuf_obj(dbuf_guard* guard /* = NULL */)
+	: nrefer_(0)
 {
 	if (guard)
-	{
-		nrefer_ = 1;
 		guard->push_back(this);
-	}
-	else
-		nrefer_ = 0;
 }
 
 dbuf_guard::dbuf_guard(acl::dbuf_pool* dbuf /* = NULL */, size_t nblock /* = 2 */)