A simple example is as follows: int a = 1 int* p = &a ... ... int c = *p Only the address information is retained in the pointer, so when the program sees * p on the last line, it can know that "take an int from this place ", then there must be...
1. Use ring buffers to exchange data, threadWrite-> buf-> threadRead threadWrite { memcpy(buf[pushCount & mask], value, size); pushCountPP; ... } threadRead { ... } if mask = = 2, pushCount accumulates from 0 when pushCount = 0 pushCount & ma...
all the spin locks I see are implemented using CAS technology, without mutexes, and are often used for lock-free programming, so spin locks should not be locks, am I right? In addition, is there any other way to implement spin lock besides using CAS? ...
I recently upgraded gdb from 7.12 to 8: 00, and debug found that when I display a string, the content displayed is very complicated! For example, startSym= "A "; such a simple string, disp startSym appears as follows: >>> disp startSym $2 = {...
is currently getting started learning about FFmpeg. When introducing SDL threads, there are the following problems: 1. Create demux_ thread in main thread 2. demux_thread 3. main 4. Complete code ffplay.c -sharpinclude <stdio.h> -sha...
can cPP inherit the generated class of pb? Want to add some features. There is no problem from the point of view of language implementation. no, no, no. But it looks like no one s ever done that before. ...
Hello, I d like to talk about why m [3] [0] this expression Will exist? And why don t you write the formula + 1 (the result of m [2] [0] is the same as that of m [2] [0])? Thank you ...
-sharpinclude <iostream> -sharpinclude <string> using namespace std; int main() { string s("some string"); if (s.begin() != s.end()) { auto it = s.begin(); while (it != s.end() && !isspace(*it)) ...
an error was reported when installing protobuf-cpp.3.5.1. The error is as follows: . google protobuf stubs hash.h: In instantiation of google::protobuf::hash < long long int > : . google protobuf map_field.h:817: instantiated from here . google...
< H1 > question < H1 > I want to compile it with make. The header file uses iconv.h , but cygwin already has libiconv installed . ...
excuse me: linuxnginx 1. 2. 3.swoole nginx ...
1. It is determined that the background color is changed to blue 2 when the event is away from the top 100px. Mousedown up move failure in chrome mobile mode <template> <div id="box"> <strong>:< strong>&l...
how to get the IAccessible interface pointer of a QQ chat window from one level to the next? IAccessible ! I wonder why I don t have the child window I want to do. I really appreciate it. ...
hide the sensitive value in the native layer to prevent decompilation from being searched for by keywords. I use this method. charstringsrcstring -sharpinclude <stdio.h> int main() { char src[] = "ab"; int len = 0; ...
< H1 > include < iostream > < H1 > < H1 > include < string > < H1 > using namespace std; class ProductDog; class CodeMonkey; class ProductDog { string name; int opt; public: int s; void add_todolist(CodeMonkey& a,int b); void reduce_todoli...
I am doing the Titanic test and found that the meaning of such a code is not quite clear 1 Why is there a number in the first one, please tell me what does it mean 2 Why? + means to repeat what does it mean by using two 3 regular expressions? Thank y...
there is a host that runs the bitcoind program. How can I get the results of the interface of bitcoin-cli through the rpc interface from another machine? ...
The architecture is as follows: nginx acts as a reverse proxy to proxy pass the http request to the backend golang http server nginx==>httpserver is it possible to restart gracefully in this way 1. Start a new golang http server to listen on o...
A weird error this error is hot to the eye. In theory, this kind of error VS should give the error prompt directly, but there is no error prompt. This kind of error will only occur when I click on the compilation. Then I see that there is nothing...
for example, if I have a function in the c file that I want to export and open to others to call, how can I automatically generate these function declarations into the .h header file? ...
$coinbasePublicAPI = https: api.coinmarketcap.com. ;$coinData = file_get_contents ($coinbasePublicAPI); var_dump ($coinData); Why is the result NULL empty ) original: https: stackoverflow.com que. is it that the person who asked the questio...
< H2 > an error occurred on line 20 < H2 > here is the complete code for this php file: <?php header( content-type:text html;charset=utf-8 ); date_default_timezone_set( PRC ); $file="123.txt"; $msgs=[]; if (file_exists($file)){...
this is the addition of index.js to proxyTable in config proxyTable: { research : { target: https: api.shenjian.io ?appid=c36a22e564a2954e&keyword=a&pageNo=1&pageSize=20 , changeOrigin: true, ...
I have two child parent components. The list, obtained by the parent component for asynchronous requests in create uses prop to render data to the child component, but when it comes to the child component, the list is undefined; if the list is initializ...
flutter s sms package has a method to get all the text messages, but it returns a future object. how do I get the content and export it to a csv file? ...