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Added event_poll function; optimization experiments

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This commit is contained in:
Olof hagsand 2017-09-15 17:24:51 +02:00
parent 624b949b3f
commit 687641e944
6 changed files with 148 additions and 20 deletions
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33
lib/src/clixon_event.c
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@ -251,6 +251,26 @@ event_unreg_timeout(int (*fn)(int, void*),
return found?0:-1;
}
/*! Poll to see if there is any data available on this file descriptor.
* @param[in] fd File descriptor
* @retval -1 Error
* @retval 0 Nothing to read/empty fd
* @retval 1 Something to read on fd
*/
int
event_poll(int fd)
{
int retval = -1;
fd_set fdset;
struct timeval tnull = {0,};
FD_ZERO(&fdset);
FD_SET(fd, &fdset);
if ((retval = select(FD_SETSIZE, &fdset, NULL, NULL, &tnull)) < 0)
clicon_err(OE_EVENTS, errno, "%s select1: %s", __FUNCTION__, strerror(errno));
return retval;
}
/*! Dispatch file descriptor events (and timeouts) by invoking callbacks.
* There is an issue with fairness that timeouts may take over all events
* One could try to poll the file descriptors after a timeout?
@ -258,11 +278,14 @@ event_unreg_timeout(int (*fn)(int, void*),
int
event_loop(void)
{
struct event_data *e, *e_next;
int n;
struct timeval t, t0, tnull={0,};
fd_set fdset;
int retval = -1;
struct event_data *e;
struct event_data *e_next;
int n;
struct timeval t;
struct timeval t0;
struct timeval tnull = {0,};
fd_set fdset;
int retval = -1;
while (!clicon_exit_get()){
FD_ZERO(&fdset);