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/*
* ion/libmainloop/mainloop.c
*
* Partly based on a contributed code.
*
* See the included file LICENSE for details.
*/
#include <libtu/types.h>
#include <libtu/misc.h>
#include <libtu/dlist.h>
#include "select.h"
/*{{{ File descriptor management */
static WInputFd *input_fds=NULL;
static WInputFd *find_input_fd(int fd)
{
WInputFd *tmp=input_fds;
while(tmp){
if(tmp->fd==fd)
break;
tmp=tmp->next;
}
return tmp;
}
bool mainloop_register_input_fd(int fd, void *data,
void (*callback)(int fd, void *d))
{
WInputFd *tmp;
if(find_input_fd(fd)!=NULL)
return FALSE;
tmp=ALLOC(WInputFd);
if(tmp==NULL)
return FALSE;
tmp->fd=fd;
tmp->data=data;
tmp->process_input_fn=callback;
LINK_ITEM(input_fds, tmp, next, prev);
return TRUE;
}
void mainloop_unregister_input_fd(int fd)
{
WInputFd *tmp=find_input_fd(fd);
if(tmp!=NULL){
UNLINK_ITEM(input_fds, tmp, next, prev);
free(tmp);
}
}
static void set_input_fds(fd_set *rfds, int *nfds)
{
WInputFd *tmp=input_fds;
while(tmp){
FD_SET(tmp->fd, rfds);
if(tmp->fd>*nfds)
*nfds=tmp->fd;
tmp=tmp->next;
}
}
static void check_input_fds(fd_set *rfds)
{
WInputFd *tmp=input_fds, *next=NULL;
while(tmp){
next=tmp->next;
if(FD_ISSET(tmp->fd, rfds))
tmp->process_input_fn(tmp->fd, tmp->data);
tmp=next;
}
}
/*}}}*/
/*{{{ Select */
void mainloop_select()
{
fd_set rfds;
int nfds=0;
FD_ZERO(&rfds);
set_input_fds(&rfds, &nfds);
if(select(nfds+1, &rfds, NULL, NULL, NULL)>0)
check_input_fds(&rfds);
}
/*}}}*/
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