In the non-blocking state of the recv function, no data is returned with a value of 0. If the client shuts down, the return value is also 0. How can the two states be distinguished? ...
In the nginx server, after hearing an event in the socket, put the file descriptor in the queue and parse it. how to implement async in this process? where does the nginx server reflect async? there is a question I can t figure out all the time. Are ...
-sharpinclude <stdio.h> int main() { short int x = -10; - 1000 0000 0000 1010 - 1111 1111 1111 0101 - 1111 1111 1111 0110 F F F 6 - fffffff6, 4 printf("%x n", x); } I just ...
< H1 > as the title < H1 > recently, when I was getting started learning ffmpeg, and watching ffplay.c, I had some doubts about the serial variable. I don t know if any of the bosses stepped on the pit first. < H2 > Code < H2 > ffplay-3.4.2 sour...
refer to Exceptions in C with Longjmp and Setjmp to write the following program: -sharpinclude <setjmp.h> -sharpinclude <signal.h> -sharpinclude <stdio.h> jmp_buf ex_buf__; -sharpdefine TRY do{ if(!setjmp(ex_buf__)) { -sharpdefine...
< H1 > Code < H1 > -sharpinclude <stdio.h> struct test{ int i; short c; char *p; }; int main(void) { struct test *pt = NULL; printf("%p n", &(pt->i)); printf("%p n", &(pt->c)); prin...
at the user level, it is easy to send packets using functions such as socket sendto. in the kernel layer, if you use skb to send packets, it always feels like writing from the underlying wheel. within the BSD kernel, you should be able to send simple...
printf("data = %d n",head->next->data); printf("data = %d n",head->data); printf("data = %d n",head->next->data); There is nothing in the middle of the continuous printf, on the main function, but th...
isn t it web server (nginx,Apache) to handle request headers and request lines? Why does psr-7 define several interfaces that handle request headers and request lines? in which scenarios will php receive the original http message directly for proce...
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...
work needs to read make recently there is an example in the official GNU make document that I don t quite understand, and some friends who understand it want to give an answer. is as follows: Makefile: objects = main.o kbd.o command.o display.o ...
client is written in C by yourself -sharpdefine BUFFER_SIZE 1024 char recv_buffer[BUFFER_SIZE]; char send_buffer[BUFFER_SIZE]; ... else if (start_with(cmd_read, "cd")) { char *token; const char delim[2] = " t"; to...
-sharpinclude<stdio.h> -sharpinclude<stdlib.h> -sharpinclude<time.h> typedef struct node{ int num; struct node *next; } Node; Node* merge(Node *a,Node *b) { Node *l1=a,*l2=b; Node *tmp=NULL; Node *temp=NU...
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...
< H1 > question < H1 > I want to compile it with make. The header file uses iconv.h , but cygwin already has libiconv installed . ...
-sharpinclude<stdio.h> -sharpinclude<stdlib.h> -sharpinclude<time.h> -sharpdefine V_NUM 10 10 typedef struct node { int num; int index; struct node *next; } Node; typedef struct { Node **v_a...
excuse me: linuxnginx 1. 2. 3.swoole nginx ...
Can C declare dynamic arrays? As far as I know, it doesn t work. You must specify size . For example, the following will report an error . string name[]; then the parameters of, command line implement the declaration of dynamic array in the following ...
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. ...
use tags on vue pages <input type="number" min="0" max="5000" v-model="choosePayDef" placeholder=""> Click this input box on the page and you will report an error Uncaught DOMException: Faile...
$arr=[ 0 =>[ a1 => true , time => 1537861731], 1 =>[ a1 => false , time => 1541035671], 2 =>[ a1 => true , time => 1541036000], 3 =>[ a1 => true , time => 1541036010] ...
there is no problem starting to use the default taskdb,projectdb. If you change it to mysql storage, you will throw this exception ....
problem description has anyone encountered any of the above questions? it s strange that sudoers has added oracle ALL= (ALL) ALL, but still doesn t have any permissions . the environmental background of the problems and what methods you have tried ...
as mentioned above, the business needs to introduce a remote js file asynchronously, in which there is some configuration data. Is there a mature solution? ...