Aio

#include <aio.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <errno.h> #include <netinet> /*socket address struct*/ #include <arpa> /*host to network convertion*/ #include <sys> #include <sys> #include <signal.h> //#include <sys> #define MAX_TRANSPORT_LENTH 512 #define MAX_LIST 5 void sig_handler(int signo, siginfo_t *info, void *context ) { int ret; struct aiocb *req; /* Ensure it's our signal */ if (info-&gt;si_signo == SIGIO) { req = (struct aiocb *)info-&gt;si_value.sival_ptr; if (aio_error( req ) == 0) { ret = aio_return( req ); (char*)(req-&gt;aio_buf+ret) == '\0'; puts(req-&gt;aio_buf); } } return; } int main() { int skt_fd,ret; struct aiocb my_aiocb; struct sigaction sig_act; struct sockaddr_in addr; memset(&amp;addr,0,sizeof(addr)); addr.sin_family = AF_INET; addr.sin_addr.s_addr = INADDR_ANY; addr.sin_port = htons(50001); skt_fd = socket(AF_INET, SOCK_DGRAM, 0); if(skt_fd == -1) { perror("Create socket failed"); exit(-1); } ret = bind(skt_fd,(struct sockaddr *)&amp;addr,sizeof(addr)); if(-1 == ret) { perror("Bind socket failed"); exit(-1); } memset(&amp;my_aiocb,0,sizeof(my_aiocb)); my_aiocb.aio_buf = malloc(MAX_TRANSPORT_LENTH+1); if (!my_aiocb.aio_buf) perror("malloc"); my_aiocb.aio_fildes = skt_fd; my_aiocb.aio_nbytes = MAX_TRANSPORT_LENTH; my_aiocb.aio_offset = 0; my_aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL; my_aiocb.aio_sigevent.sigev_signo = SIGIO; my_aiocb.aio_sigevent.sigev_value.sival_ptr = &amp;my_aiocb; sigemptyset(&amp;sig_act.sa_mask); sig_act.sa_flags = SA_SIGINFO; sig_act.sa_sigaction = sig_handler; const struct aiocb *cblist[MAX_LIST] ={&amp;my_aiocb,NULL,NULL,NULL,NULL}; sigaction( SIGIO, &amp;sig_act, NULL ); ret = aio_read( &amp;my_aiocb ); //程序挂起直到等到某个信号 while ( aio_suspend( cblist, MAX_LIST, NULL ) == 0) { ret = aio_read( &amp;my_aiocb ); }; puts("Interrupted finish."); close(skt_fd); }</sys></signal.h></sys></sys></arpa></netinet></errno.h></fcntl.h></unistd.h></stdlib.h></stdio.h></aio.h>