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authorblacksirius <blacksirius@54d463be-8e91-2dee-dedb-b68131a5f0ec>2012-06-12 00:59:55 +0000
committerblacksirius <blacksirius@54d463be-8e91-2dee-dedb-b68131a5f0ec>2012-06-12 00:59:55 +0000
commit49586af4b75b96010380576fe9ce0a9b67a83ac2 (patch)
treeafebe591c3a1a372f66422f495f5e1fd0538032e /src/common/evdp_epoll.c
parent0598cc569db02ee93d7fc0470defecb64e995f5c (diff)
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added new networking subsystem (early stage - files are not compiled yet during normal build!)
Note The files i added / modifications i did, are not affecting a normal build nothing gets changed yet! Linux 2.5+ only yet. git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@16271 54d463be-8e91-2dee-dedb-b68131a5f0ec
Diffstat (limited to 'src/common/evdp_epoll.c')
-rw-r--r--src/common/evdp_epoll.c233
1 files changed, 233 insertions, 0 deletions
diff --git a/src/common/evdp_epoll.c b/src/common/evdp_epoll.c
new file mode 100644
index 000000000..d71c8d4d7
--- /dev/null
+++ b/src/common/evdp_epoll.c
@@ -0,0 +1,233 @@
+//
+// Event Dispatcher Abstraction for EPOLL
+//
+// Author: Florian Wilkemeyer <fw@f-ws.de>
+//
+// Copyright (c) rAthena Project (www.rathena.org) - Licensed under GNU GPL
+// For more information, see LICENCE in the main folder
+//
+//
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <sys/epoll.h>
+#include <sys/fcntl.h>
+#include <sys/socket.h>
+
+#include "../common/cbasetypes.h"
+#include "../common/showmsg.h"
+#include "../common/evdp.h"
+
+
+#define EPOLL_MAX_PER_CYCLE 10 // Max Events to coalesc. per cycle.
+
+
+static int epoll_fd = -1;
+
+
+void evdp_init(){
+
+ epoll_fd = epoll_create( EPOLL_MAX_PER_CYCLE );
+ if(epoll_fd == -1){
+ ShowFatalError("evdp [EPOLL]: Cannot create event dispatcher (errno: %u / %s)\n", errno, strerror(errno) );
+ exit(1);
+ }
+
+}//end: evdp_init()
+
+
+void evdp_final(){
+
+ if(epoll_fd != -1){
+ close(epoll_fd);
+ epoll_fd = -1;
+ }
+
+}//end: evdp_final()
+
+
+int32 evdp_wait(EVDP_EVENT *out_fds, int32 max_events, int32 timeout_ticks){
+ struct epoll_event l_events[EPOLL_MAX_PER_CYCLE];
+ register struct epoll_event *ev;
+ register int nfds, n;
+
+ if(max_events > EPOLL_MAX_PER_CYCLE)
+ max_events = EPOLL_MAX_PER_CYCLE;
+
+ nfds = epoll_wait( epoll_fd, l_events, max_events, timeout_ticks);
+ if(nfds == -1){
+ // @TODO: check if core is in shutdown mode. if - ignroe error.
+
+ ShowFatalError("evdp [EPOLL]: epoll_wait returned bad / unexpected status (errno: %u / %s)\n", errno, strerror(errno));
+ exit(1); //..
+ }
+
+ // Loop thru all events and copy it to the local ra evdp_event.. struct.
+ for(n = 0; n < nfds; n++){
+ ev = &l_events[n];
+
+ out_fds->fd = ev->data.fd;
+ out_fds->events = 0; // clear
+
+ if(ev->events & EPOLLHUP)
+ out_fds->events |= EVDP_EVENT_HUP;
+
+ if(ev->events & EPOLLIN)
+ out_fds->events |= EVDP_EVENT_IN;
+
+ if(ev->events & EPOLLOUT)
+ out_fds->events |= EVDP_EVENT_OUT;
+
+ out_fds++;
+ }
+
+ return nfds; // 0 on timeout or > 0 ..
+}//end: evdp_wait()
+
+
+void evdp_remove(int32 fd, EVDP_DATA *ep){
+
+ if(ep->ev_added == true){
+
+ if( epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fd, &ep->ev_data) != 0){
+ ShowError("evdp [EPOLL]: evdp_remove - epoll_ctl (EPOLL_CTL_DEL) failed! fd #%u (errno %u / %s)\n", fd, errno, strerror(errno));
+ }
+
+ ep->ev_data.events = 0; // clear struct.
+ ep->ev_data.data.fd = -1; // .. clear struct ..
+
+ ep->ev_added = false; // not added!
+ }
+
+
+}//end: evdp_remove()
+
+
+bool evdp_addlistener(int32 fd, EVDP_DATA *ep){
+
+ ep->ev_data.events = EPOLLET|EPOLLIN;
+ ep->ev_data.data.fd = fd;
+
+ // No check here for 'added ?'
+ // listeners cannot be added twice.
+ //
+ if( epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd, &ep->ev_data) != 0 ){
+ ShowError("evdp [EPOLL]: evdp_addlistener - epoll_ctl (EPOLL_CTL_ADD) faield! fd #%u (errno %u / %s)\n", fd, errno, strerror(errno));
+ ep->ev_data.events = 0;
+ ep->ev_data.data.fd = -1;
+ return false;
+ }
+
+ ep->ev_added = true;
+
+ return true;
+}//end: evdp_addlistener()
+
+
+bool evdp_addclient(int32 fd, EVDP_DATA *ep){
+
+ ep->ev_data.events = EPOLLIN | EPOLLHUP;
+ ep->ev_data.data.fd = fd;
+
+ // No check for "added?" here,
+ // this function only gets called upon accpept.
+ //
+
+ if( epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd, &ep->ev_data) != 0){
+ ShowError("evdp [EPOLL]: evdp_addclient - epoll_ctl (EPOLL_CTL_ADD) failed! fd #%u (errno %u / %s)\n", fd, errno, strerror(errno));
+ ep->ev_data.events = 0;
+ ep->ev_data.data.fd = -1;
+ return false;
+ }
+
+ ep->ev_added = true;
+
+ return true;
+}//end: evdp_addclient()
+
+
+bool evdp_addconnecting(int32 fd, EVDP_DATA *ep){
+
+ ep->ev_data.events = EPOLLET | EPOLLOUT | EPOLLHUP;
+ ep->ev_data.data.fd = fd;
+
+ if( epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd, &ep->ev_data) != 0){
+ ShowError("evdp [EPOLL]: evdp_addconnecting - epoll_ctl (EPOLL_CTL_ADD) failed! fd #%u (errno %u / %s)\n", fd, errno, strerror(errno));
+ ep->ev_data.events = 0;
+ ep->ev_data.data.fd = -1;
+ }
+
+ ep->ev_added = true;
+
+ return true;
+}//end: evdp_addconnecting()
+
+
+bool evdp_outgoingconnection_established(int32 fd, EVDP_DATA *ep){
+ int32 saved_mask;
+
+ if(ep->ev_added != true){
+ // !
+ ShowError("evdp [EPOLL]: evdp_outgoingconnection_established fd #%u is not added to event dispatcher! invalid call.\n", fd);
+ return false;
+ }
+
+ saved_mask = ep->ev_data.events;
+
+ ep->ev_data.events = EPOLLIN | EPOLLHUP;
+
+ if( epoll_ctl(epoll_fd, EPOLL_CTL_MOD, fd, &ep->ev_data) != 0){
+ ep->ev_data.events = saved_mask; // restore old mask.
+ ShowError("evdp [EPOLL]: evdp_outgoingconnection_established - epoll_ctl (EPOLL_CTL_MOD) failed! fd #%u (errno %u / %s)\n", fd, errno, strerror(errno));
+ return false;
+ }
+
+ return true;
+}//end: evdp_outgoingconnection_established()
+
+
+bool evdp_writable_add(int32 fd, EVDP_DATA *ep){
+
+ if(ep->ev_added != true){
+ ShowError("evdp [EPOLL]: evdp_writable_add - tried to add not added fd #%u\n",fd);
+ return false;
+ }
+
+ if(! (ep->ev_data.events & EPOLLOUT) ){ //
+
+ ep->ev_data.events |= EPOLLOUT;
+ if( epoll_ctl(epoll_fd, EPOLL_CTL_MOD, fd, &ep->ev_data) != 0 ){
+ ShowError("evdp [EPOLL]: evdp_writable_add - epoll_ctl (EPOLL_CTL_MOD) failed! fd #%u (errno: %u / %s)\n", fd, errno, strerror(errno));
+ ep->ev_data.events &= ~EPOLLOUT; // remove from local flagmask due to failed syscall.
+ return false;
+ }
+ }
+
+ return true;
+}//end: evdp_writable_add()
+
+
+void evdp_writable_remove(int32 fd, EVDP_DATA *ep){
+
+ if(ep->ev_added != true){
+ ShowError("evdp [EPOLL]: evdp_writable_remove - tried to remove not added fd #%u\n", fd);
+ return;
+ }
+
+ if( ep->ev_data.events & EPOLLOUT ){
+
+ ep->ev_data.events &= ~EPOLLOUT;
+ if( epoll_ctl(epoll_fd, EPOLL_CTL_MOD, fd, &ep->ev_data) != 0){
+ ShowError("evdp [EPOLL]: evdp_writable_remove - epoll_ctl (EPOLL_CTL_MOD) failed! fd #%u (errno %u / %s)\n", fd, errno, strerror(errno));
+ ep->ev_data.events |= EPOLLOUT; // add back to local flagmask because of failed syscall.
+ return;
+ }
+ }
+
+ return;
+}//end: evdp_writable_remove()
+