青青草原综合久久大伊人导航_色综合久久天天综合_日日噜噜夜夜狠狠久久丁香五月_热久久这里只有精品

szwolf

專注于C++技術(shù),再用1年的時間努力學(xué)C++!
隨筆 - 2, 文章 - 0, 評論 - 2, 引用 - 0
數(shù)據(jù)加載中……

STL學(xué)習(xí)之二:STL內(nèi)存工具(一)

??????用Traits進行類別推導(dǎo),將類別選擇工作放到編譯期進行,利用重載提高效率。
??????下面的type_traits.h是我直接從SGI STL里Copy出來的。。。

#ifndef?TYPE_TRAITS_H
#define ?TYPE_TRAITS_H

// 為了了重載確定那些類弄型是不用析構(gòu)的SGI?STl用了type_traits
// 并將一些Scale?type進行特例化
struct ?__true_type? {
}
;

struct ?__false_type? {
}
;

template?
< class ?_Tp >
struct ?__type_traits? {?
???typedef?__true_type?????this_dummy_member_must_be_first;

???typedef?__false_type????has_trivial_default_constructor;
???typedef?__false_type????has_trivial_copy_constructor;
???typedef?__false_type????has_trivial_assignment_operator;
???typedef?__false_type????has_trivial_destructor;
???typedef?__false_type????is_POD_type;
}
;

template
<>
struct ?__type_traits < bool > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < char > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < signed? char > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < unsigned? char > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < wchar_t > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;

template
<>
?
struct ?__type_traits < short > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < unsigned? short > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < int > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < unsigned? int > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < long > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < unsigned? long > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;

#ifdef?__STL_LONG_LONG
template
<>
?
struct ?__type_traits < long ? long > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;

?
struct ?__type_traits < unsigned? long ? long > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;

#endif ?/*?__STL_LONG_LONG?*/
template
<>
?
struct ?__type_traits < float > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < double > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < long ? double > ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;

template?
< class ?_Tp >
struct ?__type_traits < _Tp *> ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < char *> ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < signed? char *> ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < unsigned? char *> ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < const ? char *> ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < const ?signed? char *> ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;
template
<>
?
struct ?__type_traits < const ?unsigned? char *> ? {
???typedef?__true_type????has_trivial_default_constructor;
???typedef?__true_type????has_trivial_copy_constructor;
???typedef?__true_type????has_trivial_assignment_operator;
???typedef?__true_type????has_trivial_destructor;
???typedef?__true_type????is_POD_type;
}
;

#endif

以下是construct 和 destroy的實現(xiàn)
#ifndef?MEM_TOOlS_H
#define?MEM_TOOlS_H
#include?
"type_traits.h"
using?namespace?std;
namespace?SGI
{
????template
<typename?T1,?typename?T2>
????inline?
void?construct(T1*?p,?const?T2&?value)
????
{
????????
new(p)T1(value);
????}

????
????template
<typename?T>
????inline?
void?construct(T*?p)
????
{
????????
new(p)T();
????}


????template
<typename?T>
????
void?destroy(T*?p)
????
{
????????p
->~T();
????}


????template
<typename?ForwardIterator>
????inline?
void?destroy_aux(ForwardIterator?first,?ForwardIterator?last,?__false_type)
????
{
????????
for?(;?first?<?last;?++first)
????????????destroy(
&*first);

????????cout?
<<?"false?type"?<<?endl;
????}


????template
<typename?ForwardIterator>
????inline?
void?destroy_aux(ForwardIterator?first,?ForwardIterator?last,?__true_type)
????
{
????????cout?
<<?"true?type"?<<?endl;
????}


????template
<typename?ForwardIterator>
????inline?
void?destroy(ForwardIterator?first,?ForwardIterator?last)
????
{
????????_destroy(first,?last,?value_type(
*first));
????}


????template
<typename?ForwardIterator,?typename?T>
????inline?
void?_destroy(ForwardIterator?first,?ForwardIterator?last,?T*)
????
{
????????typedef?__type_traits
<T>::has_trivial_destructor?trivial_destructor;
????????destroy_aux(first,?last,?trivial_destructor());
????}


????inline?
void?destroy(char*,?char*)?
????
{
????????cout?
<<?"char*?type"?<<?endl;
????}

????inline?
void?destroy(wchar_t*,?wchar_t*)?
????
{
????????cout?
<<?"wchar_t*?type"?<<?endl;
????}
????

}


#endif

在main中對construct,destroy時行測試

//?mem_tools.cpp?:?定義控制臺應(yīng)用程序的入口點。
//
/*
?*????模仿實現(xiàn)SGI?STL中的內(nèi)存工具
?*??szwolf?@?szu
?*??2006.08.07
?
*/

#include?
"stdafx.h"
#include?
"sgi_allocator.h"
#include?
<iostream>
#include?
<vector>
#include?
<algorithm>
#include?
"mem_tools.h"

class?mem_test
{
public:
????mem_test(
const?char*?msg)
????
{
????????cout?
<<?msg?<<?endl;
????}


????
~mem_test()
????
{
????????cout?
<<?"dead~~"?<<?endl;
????}

}
;

int?_tmain(int?argc,?_TCHAR*?argv[])
{
????
//????很郁悶為什么下面的代碼是錯的?
????
//????typedef?simple_alloc<mem_test,?SGI::alloc>?data_allcator;
????
//????mem_test*?t?=?data_allocator::allocate();

????SGI::simple_alloc
<mem_test,?SGI::alloc>?data_allocator;
????
????mem_test
*?t?=?data_allocator.allocate();

????SGI::construct(t,?
"come to live!");
????SGI::destroy(
&*t);

????SGI::simple_alloc
<char,?SGI::alloc>?char_alloc;
????
char?*p?=?char_alloc.allocate(133);
????strcpy(p,?
"hellow!");
????SGI::destroy(p,p
+8);
????char_alloc.deallocate(p,?
133);

????system(
"pause");
????
return?0;
}
實中用到的simple_alloc及sgi_allocator.h是上一篇隨筆里的東西。。。

posted on 2006-08-07 01:47 szwolf 閱讀(1066) 評論(0)  編輯 收藏 引用


只有注冊用戶登錄后才能發(fā)表評論。
網(wǎng)站導(dǎo)航: 博客園   IT新聞   BlogJava   博問   Chat2DB   管理


青青草原综合久久大伊人导航_色综合久久天天综合_日日噜噜夜夜狠狠久久丁香五月_热久久这里只有精品
  • <ins id="pjuwb"></ins>
    <blockquote id="pjuwb"><pre id="pjuwb"></pre></blockquote>
    <noscript id="pjuwb"></noscript>
          <sup id="pjuwb"><pre id="pjuwb"></pre></sup>
            <dd id="pjuwb"></dd>
            <abbr id="pjuwb"></abbr>
            好吊妞这里只有精品| 一区在线视频| 香港久久久电影| 老鸭窝亚洲一区二区三区| 亚洲二区在线| 欧美视频导航| 久久大逼视频| 亚洲狼人精品一区二区三区| 午夜日韩在线观看| 亚洲二区在线观看| 国产精品国产三级国产a| 欧美在线影院| 日韩视频一区二区三区在线播放免费观看| 亚洲欧美大片| 亚洲国产精品va在线看黑人动漫| 欧美日本在线观看| 久久爱另类一区二区小说| 亚洲国产精品热久久| 亚洲男人第一网站| 亚洲国产导航| 国产欧美日韩激情| 欧美黄色aaaa| 久久激情五月激情| 亚洲视频日本| 亚洲国产成人精品久久久国产成人一区 | 欧美日韩p片| 欧美有码视频| aa国产精品| 亚洲成人直播| 久久人人爽人人爽爽久久| 亚洲性视频网站| 91久久久亚洲精品| 韩国一区电影| 国产精品一区一区| 欧美日韩国产影片| 免费视频一区| 久久九九免费| 性做久久久久久| 中文国产亚洲喷潮| 最新69国产成人精品视频免费| 久久蜜臀精品av| 欧美一级在线亚洲天堂| 中文高清一区| 日韩西西人体444www| 亚洲国产高潮在线观看| 国产一区二区三区精品欧美日韩一区二区三区 | 国产免费成人av| 欧美日韩精品在线观看| 欧美chengren| 免费黄网站欧美| 久久频这里精品99香蕉| 久久av一区| 欧美在线三区| 久久se精品一区精品二区| 午夜久久资源| 羞羞视频在线观看欧美| 亚洲欧美国产毛片在线| 亚洲自拍偷拍视频| 亚洲一区三区在线观看| 亚洲一区二区免费视频| 亚洲午夜精品在线| 亚洲小少妇裸体bbw| 中文久久精品| 亚洲一区精品电影| 亚洲欧美在线x视频| 亚洲欧美国产视频| 午夜天堂精品久久久久| 欧美一区二区高清在线观看| 午夜一区二区三区在线观看| 午夜综合激情| 久久久www成人免费无遮挡大片| 久久精品国产99精品国产亚洲性色| 午夜精品久久久久久久 | 蜜桃av久久久亚洲精品| 免费成人毛片| 欧美精品久久久久久久久老牛影院 | 国产精品一区一区| 韩国一区二区在线观看| 在线播放豆国产99亚洲| 亚洲成色最大综合在线| 亚洲精品韩国| 一本色道久久综合亚洲二区三区 | 久久久国产午夜精品| 狂野欧美性猛交xxxx巴西| 欧美成人精品1314www| 欧美噜噜久久久xxx| 国产精品久久久999| 韩国av一区二区| 亚洲三级观看| 亚洲欧美国产一区二区三区| 久久九九免费视频| 亚洲第一在线综合在线| 一区二区三区欧美在线| 欧美中在线观看| 欧美韩日一区二区三区| 国产精品日韩欧美一区| 亚洲大胆在线| 亚洲制服av| 免费久久精品视频| 99re热这里只有精品免费视频| 亚洲欧美在线aaa| 欧美成人免费大片| 国产精品视频区| 亚洲三级毛片| 久久九九国产精品| 日韩亚洲欧美一区二区三区| 欧美一区二区在线免费播放| 欧美高清免费| 国产一区免费视频| 亚洲色诱最新| 欧美大片免费久久精品三p| 亚洲一区二区成人在线观看| 噜噜噜噜噜久久久久久91| 欧美午夜精品一区二区三区| 一区在线视频观看| 亚洲欧美经典视频| 亚洲国产美女| 欧美专区在线| 国产精品日本欧美一区二区三区| 亚洲人成小说网站色在线| 久久久久久电影| 亚洲性视频网址| 欧美日韩ab片| 亚洲欧洲日韩在线| 久久久在线视频| 一个人看的www久久| 欧美成人精品在线| 一区二区三区在线视频观看| 亚洲欧美在线看| 999亚洲国产精| 欧美国产一区二区| 亚洲高清影视| 久久亚洲综合| 羞羞视频在线观看欧美| 国产精品视频| 亚洲男女毛片无遮挡| 亚洲人体一区| 欧美护士18xxxxhd| 亚洲精品韩国| 欧美激情一二区| 久久久久青草大香线综合精品| 国产精品激情| 亚洲欧美日韩精品一区二区| 亚洲国内在线| 欧美激情一区二区三区不卡| **性色生活片久久毛片| 美女精品在线观看| 久久久久九九九| 尤物99国产成人精品视频| 久久久久国产一区二区三区四区| 亚洲自拍三区| 国产欧美在线看| 久久国产精品一区二区| 午夜伦欧美伦电影理论片| 国产欧美一区二区三区另类精品 | 久久精品成人欧美大片古装| 国产欧美日韩精品丝袜高跟鞋| 亚洲女同精品视频| 亚洲一区二区三区在线观看视频| 国产精品乱码一区二区三区| 亚洲欧美日韩一区二区| 亚洲一区二区精品在线观看| 日韩午夜激情av| 国产精品久久精品日日| 欧美亚洲免费电影| 欧美一区二区三区日韩| 精品999网站| 亚洲高清影视| 欧美日韩免费高清| 亚洲欧美电影在线观看| 亚洲欧美日韩国产| 一区福利视频| 91久久夜色精品国产九色| 欧美日韩综合精品| 欧美一区二区三区男人的天堂| 小处雏高清一区二区三区| 一区国产精品| 亚洲精品精选| 国产日本精品| 亚洲第一色中文字幕| 欧美日韩综合在线| 久久精视频免费在线久久完整在线看 | 欧美一区二区高清| 亚洲黄色性网站| 日韩视频中午一区| 国产精品自在欧美一区| 欧美成人免费网| 国产精品久久97| 美女主播视频一区| 欧美午夜大胆人体| 久久天天躁狠狠躁夜夜av| 欧美高清hd18日本| 欧美一区二视频在线免费观看| 久久综合狠狠综合久久激情| 国产精品99久久久久久久久久久久 | 亚洲美女福利视频网站| 亚洲综合精品一区二区| 亚洲精品乱码久久久久久| 亚洲一区免费| 亚洲精品日韩激情在线电影|