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add example code which use epoll API.

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limzhang(张力) 2017-05-15 17:49:25 +08:00
parent 4d8e77d712
commit fd436ff2d2
1 changed files with 145 additions and 0 deletions
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example/main_epoll.c Normal file
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#include <stdio.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <errno.h>
#include <assert.h>
#include "ff_config.h"
#include "ff_api.h"
#include "ff_epoll.h"
#define MAX_EVENTS 512
struct epoll_event ev;
struct epoll_event events[MAX_EVENTS];
struct kevent kqevents[MAX_EVENTS];
int epfd;
int sockfd;
char html[] =
"HTTP/1.1 200 OK\r\n"
"Server: F-Stack\r\n"
"Date: Sat, 25 Feb 2017 09:26:33 GMT\r\n"
"Content-Type: text/html\r\n"
"Content-Length: 439\r\n"
"Last-Modified: Tue, 21 Feb 2017 09:44:03 GMT\r\n"
"Connection: keep-alive\r\n"
"Accept-Ranges: bytes\r\n"
"\r\n"
"<!DOCTYPE html>\r\n"
"<html>\r\n"
"<head>\r\n"
"<title>Welcome to F-Stack!</title>\r\n"
"<style>\r\n"
" body { \r\n"
" width: 35em;\r\n"
" margin: 0 auto; \r\n"
" font-family: Tahoma, Verdana, Arial, sans-serif;\r\n"
" }\r\n"
"</style>\r\n"
"</head>\r\n"
"<body>\r\n"
"<h1>Welcome to F-Stack!</h1>\r\n"
"\r\n"
"<p>For online documentation and support please refer to\r\n"
"<a href=\"http://F-Stack.org/\">F-Stack.org</a>.<br/>\r\n"
"\r\n"
"<p><em>Thank you for using F-Stack.</em></p>\r\n"
"</body>\r\n"
"</html>";
int loop(void *arg)
{
/* Wait for events to happen */
int nevents = ff_epoll_wait(epfd, events, MAX_EVENTS, 0);
int i;
for (i = 0; i < nevents; ++i) {
/* Handle new connect */
if (events[i].data.fd == sockfd) {
int nclientfd = ff_accept(sockfd, NULL, NULL);
assert(nclientfd > 0);
/* Add to event list */
ev.data.fd = nclientfd;
ev.events = EPOLLIN;
assert(ff_epoll_ctl(epfd, EPOLL_CTL_ADD, nclientfd, &ev) == 0);
fprintf(stderr, "A new client connected to the server..., fd:%d\n", nclientfd);
} else {
if (events[i].events & EPOLLERR ) {
/* Simply close socket */
ff_epoll_ctl(epfd, EPOLL_CTL_DEL, events[i].data.fd, NULL);
ff_close(events[i].data.fd);
fprintf(stderr, "A client has left the server...,fd:%d\n", events[i].data.fd);
} else if (events[i].events & EPOLLIN) {
char buf[256];
size_t readlen = ff_read( events[i].data.fd, buf, sizeof(buf));
fprintf(stderr, "bytes are available to read..., readlen:%d, fd:%d\n", readlen, events[i].data.fd);
if(readlen > 0){
ff_write( events[i].data.fd, html, sizeof(html));
}
else{
ff_epoll_ctl(epfd, EPOLL_CTL_DEL, events[i].data.fd, NULL);
ff_close( events[i].data.fd);
fprintf(stderr, "A client has left the server...,fd:%d\n", events[i].data.fd);
}
} else {
fprintf(stderr, "unknown event: %8.8X\n", events[i].events);
}
}
}
}
int main(int argc, char * argv[])
{
char *conf;
if (argc < 2) {
conf = "./config.ini";
} else {
conf = argv[1];
}
ff_init(conf, argc, argv);
sockfd = ff_socket(AF_INET, SOCK_STREAM, 0);
printf("sockfd:%d\n", sockfd);
if (sockfd < 0)
printf("ff_socket failed\n");
int on = 1;
ff_ioctl(sockfd, FIONBIO, &on);
struct sockaddr_in my_addr;
bzero(&my_addr, sizeof(my_addr));
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(80);
my_addr.sin_addr.s_addr = htonl(INADDR_ANY);
int ret = ff_bind(sockfd, (struct linux_sockaddr *)&my_addr, sizeof(my_addr));
if (ret < 0) {
printf("ff_bind failed\n");
}
ret = ff_listen(sockfd, MAX_EVENTS);
if (ret < 0) {
printf("ff_listen failed\n");
}
assert((epfd = ff_epoll_create(0)) > 0);
ev.data.fd = sockfd;
ev.events = EPOLLIN;
ff_epoll_ctl(epfd, EPOLL_CTL_ADD, sockfd, &ev);
ff_run(loop, NULL);
return 0;
}