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android 上的家用机模拟器

Khan — Fri, 11 Apr 2025 07:01:00 GMT

xxx.emu�p�d�� https://github.com/Rakashazi/emu-ex-plus-alpha  中规中矩没有分��L率提升特�? 但兼�Ҏ��还不错

sony psp      ppsspp             https://github.com/hrydgard/ppsspp
sony ps1       duckstation      https://github.com/stenzek/duckstation
sony ps1       epsxe               https://www.epsxe.com
sega DC        flycast               https://github.com/flyinghead/flycast
sega saturn   Yaba Sanshiro2 https://www.yabasanshiro.com https://github.com/devmiyax/yabause 兼容性一�?/div>

Khan 2025-04-11 15:01 发表评论

关于CppBlog首页CSS样式丢失问题解决办法

Khan — Tue, 30 Apr 2024 08:54:00 GMT

��理->选项->Configure �?首页HTML代码中写�?

应该是某位大佬加了https证书后忘记将��面内的css样式链接�Ҏ��https�? ��D��该资源被��览器拦�?img src ="http://www.shnenglu.com/Khan/aggbug/230338.html" width = "1" height = "1" />

Khan 2024-04-30 16:54 发表评论

C++ Atomic

Khan — Fri, 14 Oct 2022 08:36:00 GMT

摘要: C++ Atomic atomic 是STL(标准�?中的一个头文�g, 定义�?C++11标准中的一些表�C?nbsp;�U�程�q�发控制 �?nbsp;原子操作的类与方�? 主要声明了两个类模板: std::atomic �?nbsp;std::atomic_flag, 另外�q�声明了一套C风格的原子类�?nbsp;�?C兼容的原子操作的函数. 在多... 阅读全文

Khan 2022-10-14 16:36 发表评论

Khan — Fri, 14 Oct 2022 03:33:00 GMT

autotools

mkdir build && cd build
../configure CFLAGS='-arch arm64 -arch x86_64' CXXFLAGS='-arch arm64 -arch x86_64' LDFLAGS="-arch arm64 -arch x86_64" --prefix /Users/khan/Downloads/testdisk-7.2-WIP_src/build/dist

cmake

mkdir build && cd build
cmake -DCMAKE_OSX_ARCHITECTURES='armv7;arm64;x86_64' ..

qmake

# 讄��变量
QMAKE_APPLE_DEVICE_ARCHS = x86_64 arm64

Khan 2022-10-14 11:33 发表评论

Qt for Mac DeveloperId 打包 �{�֐� 公证盖章

Khan — Fri, 07 Jan 2022 04:14:00 GMT

摘要: 以下脚本�Ҏ��QCreator for mac工程的输��Z��q�制文�g �q�行打包部��v �{�֐� 上传公证 �{�� 可在工程目录下新��Z��?deployed目录, �q�将脚本拯��到该目录下执�? 执行需要root权限支持cmake工程或qmake工程此脚本不含编译部�? 需要自行编�? �~�译成功后方可成功执�?cd $projectDir && mkdir deployed&... 阅读全文

Khan 2022-01-07 12:14 发表评论

Khan — Tue, 19 Oct 2021 08:09:00 GMT

摘要: 要点 Conan本��n是一个包��理工具, �c�M��Pyhon的pip, 本��n用Python�~�写 QT 6.0 开始引入Conan插�g, 从个��察来�? ��g��该插件仅仅引入了cmake脚本文�g Conan本��n不依赖QtCreator, 可以随意使用, 其他�~�译环境可以忽略掉本文章所有关于QT的内�? 其他不变一准备环境, 安装Conan 1.1 ... 阅读全文

Khan 2021-10-19 16:09 发表评论

linux �?windows�?获取��L��|�卡mac地址

Khan — Thu, 03 Jun 2021 09:42:00 GMT

  1 #ifndef __EHTERNET_HPP__
  2 #define __EHTERNET_HPP__
  3
  4 #if defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
  5 #define MY_WIN32
  6 #elif defined(linux) || defined(__linux) || defined(__linux__)
  7 #define MY_LINUX
  8 #endif
  9
10 #include<string>
11
12 #if defined(MY_WIN32)
13 #include <winsock2.h>
14 #include <iphlpapi.h>
15 #endif
16
17 #if defined(MY_LINUX)
18 #include <sys/socket.h>
19 //#include
20 //#include
21 #include <sys/ioctl.h>
22 #endif
23
24 #if defined(MY_WIN32)
25 std::string operstatusToStr(IF_OPER_STATUS status){
26     switch(status){
27     case IfOperStatusUp:
28         return "up";
29     case IfOperStatusDown:
30         return "down";
31     case IfOperStatusTesting:
32         return "testing";
33     case IfOperStatusUnknown:
34         return "unknown";
35     case IfOperStatusDormant:
36         return "dormant";
37     case IfOperStatusNotPresent:
38         return "notPresent";
39     case IfOperStatusLowerLayerDown:
40         return "sLowerLayerDown";
41     }
42     return "unknown";
43 }
44
45 bool GetMacByGetAdaptersAddresses(std::string& macOUT, bool all = false) {
46     bool ret = false;
47
48     ULONG family = AF_UNSPEC;//�q�回包括 IPV4 �?nbsp;IPV6 地址
49     ULONG flags = GAA_FLAG_INCLUDE_PREFIX | GAA_FLAG_INCLUDE_GATEWAYS;//包括 IPV4 �Q�IPV6 閘道�?/span>
50     ULONG outBufLen = sizeof(IP_ADAPTER_ADDRESSES) * 1;
51     PIP_ADAPTER_ADDRESSES pAddresses = NULL;
52
53     PIP_ADAPTER_ADDRESSES pCurrAddresses = NULL;
54
55     DWORD dwRetVal = 0;
56     do {
57         pAddresses = (IP_ADAPTER_ADDRESSES *)malloc(outBufLen);
58         if (pAddresses == NULL)
59             return ret;
60         dwRetVal = GetAdaptersAddresses(family, flags, NULL, pAddresses, &outBufLen);
61         if (dwRetVal == ERROR_BUFFER_OVERFLOW) {
62             free(pAddresses);
63             pAddresses = NULL;
64         } else {
65             break;
66         }
67     } while (dwRetVal == ERROR_BUFFER_OVERFLOW);
68
69     if (dwRetVal == NO_ERROR) {
70         pCurrAddresses = pAddresses;
71         while (pCurrAddresses) {
72             if (pCurrAddresses->PhysicalAddressLength != 0) {
73                 if(all || pCurrAddresses->OperStatus == IfOperStatusUp){
74                     char type[8] = {0};
75                     switch (pCurrAddresses->IfType){ //�|�卡�c�d��
76                     case MIB_IF_TYPE_ETHERNET:
77                         sprintf(type, "eth");
78                         break;
79                     case MIB_IF_TYPE_PPP:
80                         sprintf(type, "ppp");
81                         break;
82                     case MIB_IF_TYPE_LOOPBACK:
83                         sprintf(type, "loop");
84                         break;
85                     case MIB_IF_TYPE_SLIP:
86                         sprintf(type, "atm");
87                         break;
88                     case IF_TYPE_IEEE80211:
89                         sprintf(type, "wifi");
90                         break;
91                     }
92
93                     char acMAC[32];
94                     sprintf(acMAC, "%02X%02X%02X%02X%02X%02X", (unsigned char)(pCurrAddresses->PhysicalAddress[0]), (unsigned char)(pCurrAddresses->PhysicalAddress[1]),
95                             (unsigned char)(pCurrAddresses->PhysicalAddress[2]), (unsigned char)(pCurrAddresses->PhysicalAddress[3]),
96                             (unsigned char)(pCurrAddresses->PhysicalAddress[4]), (unsigned char)(pCurrAddresses->PhysicalAddress[5]));
97                     macOUT = macOUT + acMAC + '\n';
98                 }
99             }
100
101
102             pCurrAddresses = pCurrAddresses->Next;
103         }
104         ret = true;
105     } else {
106
107     }
108
109     if (pAddresses) free(pAddresses);
110     return ret;
111 }
112 #endif
113
114 #if defined(MY_LINUX)
115 bool GetMacByGetAdaptersAddresses(std::string& macOUT, bool all = false){
116     int sock, if_count, i;
117     struct ifconf ifc;
118     struct ifreq ifr[10];
119     char mac[32];
120
121     memset(&ifc, 0, sizeof(struct ifconf));
122     sock = socket(AF_INET, SOCK_DGRAM, 0);
123
124     ifc.ifc_len = 10 * sizeof(struct ifreq);
125     ifc.ifc_buf = (char *)ifr;
126
127     //获取所有网卡信�?/span>
128     ioctl(sock, SIOCGIFCONF, (char *)&ifc);
129     if_count = ifc.ifc_len / (sizeof(struct ifreq));
130     for (i = 0; i < if_count; i++) {
131         if (ioctl(sock, SIOCGIFHWADDR, &ifr[i]) == 0) {
132             if(all || (ifr[i].ifr_flags & IFF_RUNNING) ){
133                 memcpy(mac, ifr[i].ifr_hwaddr.sa_data, 6);
134                 sprintf(mac, "%02X%02X%02X%02X%02X%02X", (unsigned char)(mac[0]), (unsigned char)(mac[1]), (unsigned char)(mac[2]),
135                         (unsigned char)(mac[3]), (unsigned char)(mac[4]), (unsigned char)(mac[5]));
136                 macOUT = macOUT + mac + '\n';
137 //                printf("eth: %s, mac: %02x:%02x:%02x:%02x:%02x:%02x\n", ifr[i].ifr_name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
138             }
139         }
140     }
141     return true;
142 }
143 #endif
144
145 #endif
146
147

调用方式

std::string macs;

    GetMacByGetAdaptersAddresses(macs, true);

    qDebug() << TIMESTAMP << macs.c_str();

Khan 2021-06-03 17:42 发表评论

ChaCha20 加密 ��法 c++11实现

Khan — Thu, 03 Jun 2021 09:38:00 GMT

摘要: ChaCha20 加密/解密��法, 支持单轮多轮加密 Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 #ifndef CHACHA20_H 2 #define ... 阅读全文

Khan 2021-06-03 17:38 发表评论

SHA256 ��法c++11 实现

Khan — Thu, 03 Jun 2021 09:31:00 GMT

摘要: c++11 sha256 阅读全文

Khan 2021-06-03 17:31 发表评论

�?C++ 中实��C��个轻量的标记清除 gc �pȝ��(转蝲)

Khan — Thu, 01 Aug 2019 02:57:00 GMT

# �?C++ 中实��C��个轻量的标记清除 gc �pȝ��

[引用](https://blog.codingnow.com/2010/02/cpp_gc.html)

最�q�想�?engine 做一个简�?C++ ��装�Q�结�?QT 使用。engine 本��n是用�U?C 实现的，大部分应用基�?lua 开发。对对象生命期管理也依赖 lua �?gc �pȝ��。关于这部分的设计，可以参考我以前写的一��?�?lua ��装 C 对象的生存期��理问题 �?br />

当我们把中间层搬�?C++ 中时�Q�遇到的问题之一��是�Q�C++ 没有原生�?gc 支持。我也曾�l�写�q�一�?gc 库。但在特定应用下�q�不够简�z�。这几天�q�年休息�Q�仔�l�考虑了一下相关的需求，��试实现了一个更��单的 gc 框架。不�?200 行代码吧�Q�我直接列在�q�篇 blog 里�?br />

�q�些��是一些玩具代码，我花了一天时间来写。有许多考虑不周的地方，以及不完整的功能。但可以阐明一些基本思�\�?br />

首先我需要一个`标记清除`�?`gc�pȝ��`�Q�用来解决`引用记数`不容易解决的`循环引用`问题。它的实��C��x��`引用记数`复杂太多�Q��ƈ有相同甚��x��高的性能�?br />

我不想��用复杂的 template 技术，利用太多的语法糖让��用看��h��单。如果需要让�q�些 C++ 代码看�v来更��C��Q�更�?#8220;品味”�Q�我想也不是很难的事情�?br />

接口和实现希望尽量分��，对用的�h��暴露细节。但不拘泥于教条�Q�强求做成类�?COM 那样的通用 ABI 。还是尽量利�?C++ 语言本��n提供的机�Ӟ��不滥用�?br />

使用��量��单，不要让��用�h员有太大负担�?br />

功能满��最低需求即可。代码容易阅读，使用人员可以很快理解原理�Q�不至于误用。也方便日后扩展以适应新的需求�?br />

代码如下�Q?/div>

1 /*
2  * filename: i_gcobject.h
3  * Copyright (c) 2010 ,
4  * Cloud Wu . All rights reserved.
5  *
6  * http://www.codingnow.com
7  *
8  * Use, modification and distribution are subject to the "New BSD License"
9  * as listed at .
10  */
11
12 #ifndef interfacce_gcobject_h
13 #define interfacce_gcobject_h
14
15 #define interface struct
16
17 interface i_gcobject {
18     virtual ~i_gcobject() {}
19
20     virtual void touch() {}
21
22     virtual void mark() = 0 ;
23     virtual void grab() = 0 ;
24     virtual void release() = 0 ;
25
26     static void collect();
27 };
28 #endif

所有支�?`gc��理的接口`都��承至 `i_gcobject` �Q�提供三个方�?

* mark 可以把这个对象打上标讎ͼ�被标记的对象��不会被 collect 回收�?/div>

* grab ��对象挂接到一个被�U�呼�?root 的特�D?gcobject 上�?/div>

* release ��对象从 root 上取掉�?br />

另提�?touch 的模板方法供 mark 回调�Q�用来标记同一对象中的不同部分�?/div>

mark �Ҏ��一般在 touch �Ҏ��中��用，另外�Q�collect �Ҏ��主动调�?root �?mark �?br />

1 /*  filename: i_gcholder.h
2  *  Copyright (c) 2010 ,
3  *      Cloud Wu . All rights reserved.
4  *
5  *      http://www.codingnow.com
6  *
7  *  Use, modification and distribution are subject to the "New BSD License"
8  *  as listed at http://www.opensource.org/licenses/bsd-license.php >.
9  */
10
11 #ifndef interfacce_gcholder_h
12 #define interfacce_gcholder_h
13
14 #include "i_gcobject.h"
15
16 interface i_gcholder : virtual i_gcobject {
17   virtual void hold(i_gcobject *) = 0;
18   virtual void unhold(i_gcobject *) = 0;
19
20   static i_gcholder * create();
21 };
22 #endif

`i_gcholder` �?root 的接口，提供 `hold` �?`unhold` �Ҏ��来挂接需要持久保留的 gcobject �?br />

1 /*  filename: i_gcobject.h
2  *  Copyright (c) 2010 ,
3  *      Cloud Wu . All rights reserved.
4  *
5  *      http://www.codingnow.com
6  *
7  *  Use, modification and distribution are subject to the "New BSD License"
8  *  as listed at http://www.opensource.org/licenses/bsd-license.php >.
9  */
10
11 #ifndef interfacce_gcobject_h
12 #define interfacce_gcobject_h
13 #define interface struct
14
15 interface i_gcobject {
16
17   virtual ~i_gcobject() {}
18
19   virtual void touch() {}
20
21   virtual void mark() = 0 ;
22   virtual void grab() = 0 ;
23   virtual void release() = 0 ;
24
25   static void collect();
26 };
27 #endif

1 /*  filename: gcobject.h
2  *  Copyright (c) 2010 ,
3  *      Cloud Wu . All rights reserved.
4  *
5  *      http://www.codingnow.com
6  *
7  *  Use, modification and distribution are subject to the "New BSD License"
8  *  as listed at http://www.opensource.org/licenses/bsd-license.php >.
9  */
10
11 #ifndef gc_object_h
12 #define gc_object_h
13
14 #include "i_gcobject.h"
15
16 class gcobject : virtual i_gcobject {
17   bool marked;
18
19 public:
20   gcobject();
21
22   virtual void mark();
23   virtual void grab();
24   virtual void release();
25
26   struct f_unmarked;
27
28 };
29 #endif
30 ```
31
32 ```c++
33 /*  filename: gcobject.cpp
34  *  Copyright (c) 2010 ,
35  *      Cloud Wu . All rights reserved.
36  *
37  *      http://www.codingnow.com
38  *
39  *  Use, modification and distribution are subject to the "New BSD License"
40  *  as listed at http://www.opensource.org/licenses/bsd-license.php >.
41  */
42
43 #include "gcobject.h"
44 #include "i_gcholder.h"
45 #include
46 #include
47
48 static bool gc_trigger;
49 static std::vector gc_pool;
50 static i_gcholder * gc_root = i_gcholder::create();
51
52
53 struct gcobject::f_unmarked {
54   bool operator() (gcobject * value) {
55     bool unmarked = value->marked != gc_trigger;
56     if (unmarked) {
57       delete value;
58     }
59     return unmarked;
60   }
61 };
62
63 gcobject::gcobject() : marked(!gc_trigger) {
64   gc_pool.push_back(this);
65 }
66
67 void gcobject::mark() {
68   if (marked != gc_trigger) {
69     marked = gc_trigger;
70     touch();
71   }
72 }
73
74 void gcobject::grab(){
75   gc_root->hold(this);
76 }
77
78 void gcobject::release(){
79   gc_root->unhold(this);
80 }
81
82 void i_gcobject::collect() {
83   gc_root->mark();
84   gc_pool.erase(remove_if(gc_pool.begin(), gc_pool.end() , gcobject::f_unmarked()), gc_pool.end());
85   gc_trigger = !gc_trigger;
86 }

gcobject 为具体的 gc 实现�Q�实��C�� `mark` 、`grab`、`release` �?`collect` �Ҏ��?/div>

`mark` 采用的直接向一 bool 变量讄��标记。这个标记利用了 `trigger` �q�个乒乓开养I��每次 `collect` 都会切换状态�?/div>

`grab` �?`release` 可以把对象挂接到 root 上，或从上取掉�?/div>

`collect` 会主动从 root 开�?`mark` �Q��ƈ释放那些没有 `mark` 的对象�?br />

1 /*  filename: gcholder.cpp
2  *  Copyright (c) 2010 ,
3  *      Cloud Wu . All rights reserved.
4  *
5  *      http://www.codingnow.com
6  *
7  *  Use, modification and distribution are subject to the "New BSD License"
8  *  as listed at http://www.opensource.org/licenses/bsd-license.php >.
9  */
10
11 #include "i_gcholder.h"
12 #include "gcobject.h"
13 #include
14 #include
15 #include
16
17 class gcholder : public virtual i_gcholder, virtual gcobject {
18   std::vector hold_set;
19   std::vector unhold_set;
20
21   bool set_changed;
22   bool hold_set_sorted;
23   bool unhold_set_sorted;
24
25   void combine_set();
26   virtual void touch();
27
28   virtual void hold(i_gcobject *obj) {
29     hold_set.push_back(obj);
30     hold_set_sorted = false;
31     set_changed = true;
32   }
33
34   virtual void unhold(i_gcobject *obj) {
35     unhold_set.push_back(obj);
36     unhold_set_sorted = false;
37     set_changed = true;
38   }
39
40   struct f_mark {
41     void operator() (i_gcobject *obj) {
42       obj->mark();
43     }
44   };
45
46 public:
47
48   gcholder() :  set_changed(false),  hold_set_sorted(true) ,  unhold_set_sorted(true) {  }
49
50 };
51
52 void gcholder::combine_set(){
53   if (!hold_set_sorted) {
54     std::sort(hold_set.begin(),hold_set.end());
55     hold_set_sorted = true;
56   }
57   if (!unhold_set_sorted) {
58     std::sort(unhold_set.begin(),unhold_set.end());
59     unhold_set_sorted = true;
60   }
61   if (!unhold_set.empty()) {
62     std::vector::iterator iter1 = hold_set.begin();
63     std::vector::iterator iter2 = unhold_set.begin();
64     while (iter1 != hold_set.end() && iter2 != unhold_set.end()) {
65       if (*iter1 == *iter2) {
66         *iter1 = NULL;
67         ++iter1;
68         ++iter2;
69       } else {
70         assert(*iter1 < *iter2);
71         ++iter1;
72       }
73     }
74     i_gcobject * null = NULL;
75     hold_set.erase(std::remove(hold_set.begin(),hold_set.end(),null) , hold_set.end());
76     unhold_set.clear();
77   }
78 }
79
80 void gcholder::touch(){
81   if (set_changed) {
82     combine_set();
83     set_changed = false;
84   }
85   std::for_each(hold_set.begin(), hold_set.end(), f_mark());
86 }
87
88 i_gcholder * i_gcholder::create(){
89   return new gcholder;
90 }

gcholder 理论上可以有多个实例�Q��ƈ�怺�挂接。（否则不需要��承至 i_gcobject �Q�这个设计可以用来模拟多�U�的堆栈。但实际上�ƈ不需要这么复杂。因为在大部分应用里�Q�如果你的程序有一个周期性的��d�@环，��可以不�?gc �pȝ��里模拟出一个多�U�的堆栈。我们只用在循环之外�?collect 卛_��。再堆栈调用的较深层�ơ触�?collect 反而效果不佻I��会导致许多��?gc 对象无法回收�?/div>

最后来看一个玩具代码，�?stl 里的 mutliset 实现了一个简单的树接口。可能没有什么��用�h��|��但它演示了一个较复杂的对象相互引用的关系。�ƈ可以展示 gc 如何正确工作�?/div>

1 /*  filename: test.cpp
2  *  Copyright (c) 2010 ,
3  *      Cloud Wu . All rights reserved.
4  *
5  *      http://www.codingnow.com
6  *
7  *  Use, modification and distribution are subject to the "New BSD License"
8  *  as listed at http://www.opensource.org/licenses/bsd-license.php >.
9  */
10 #include "gcobject.h"
11 #include
12 #include <set>
13 #include
14
15 interface i_tree : virtual i_gcobject {
16   virtual void link(i_tree *p) = 0;
17   static i_tree * create();
18 };
19
20 class tree : public virtual i_tree , virtual gcobject {
21   tree *parent;
22   std::multiset children;
23   struct f_mark {
24     void operator() (tree *node) {
25       node->mark();
26     }
27   };
28
29   virtual void touch() {
30     if (parent)
31       parent->mark();
32     std::for_each(children.begin(), children.end(), f_mark());
33   }
34
35   void unlink();
36   virtual void link(i_tree *parent);
37
38 public:
39   tree() : parent(NULL) {
40     printf("create node %p\n",this);
41   }
42
43   ~tree() {
44     printf("release node %p\n",this);
45   }
46
47 };
48
49
50 void tree::unlink() {
51   if (parent) {
52     parent->children.erase(this);
53     parent = NULL;
54   }
55 }
56
57 void tree::link(i_tree *p){
58   unlink();
59   if (p) {
60     tree * cp = dynamic_cast(p);
61     cp->children.insert(this);
62     parent = cp;
63   }
64 }
65
66 i_tree *i_tree::create(){
67   return new tree;
68 }
69
70 int main(){
71   i_tree *root = i_tree::create();
72   root->grab();
73   i_tree *node;
74   node = i_tree::create();
75   node->link(root);
76   node = i_tree::create();
77   node->link(root);
78   i_gcobject::collect();
79   printf("collected\n");
80   node->link(NULL);
81   i_gcobject::collect();
82   printf("finalize\n");
83   root->release();
84   i_gcobject::collect();
85   return 0;
86 }

我们在实��C��个基�?gc 的对象时�Q�可以先定义出需要的接口�Q�让接口�?i_gcobject �l�承。例如上例中�?i_tree �?/div>

然后在实现这个接口时�Q�可以虚�l�承 gcobject 。例如上例中�?tree �?/div>

如果有需要，��重�?touch �Ҏ��Q�在 touch �Ҏ��?mark 相关�?gcobject 。对�?tree �q�个例子�Q�就是调用父亲和孩子节点�?mark �?/div>

对象依然可以写析构函敎ͼ�相当于对象的 finalize 。在析构函数中，不要再释攑֒�它相关的 gcobject �Q�那些留�l?gc �pȝ��d��成。（例如�?tree 里，��׃��要在 ~tree �?delete children 容器中的变量�Q�也不需要把自己从父亲节点上摘掉�Q?/div>

如果仅仅只是使用那些接口�Q�则不需要再包含 gcobject.h �Q�因�?gcobject 的细节只供实�?i_gcobject 时��用�?/div>

Khan 2019-08-01 10:57 发表评论

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