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s3-printing: Add method to skip refresh if just happned.

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This way if multiple process try to refresh at the same time we don't do it
over and over again.

Signed-off-by: Andreas Schneider <asn@cynapses.org>
This commit is contained in:
Simo Sorce 2010-05-14 15:49:29 -04:00 committed by Andreas Schneider
parent 7022554915
commit 25a2d94974
3 changed files with 34 additions and 0 deletions
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6
source3/printing/pcap.c
View File

@ -121,6 +121,12 @@ void pcap_cache_reload(struct tevent_context *ev,
return;
}
if (!printer_list_need_refresh()) {
/* has been just refeshed, skip */
DEBUG(5, ("Refresh just happend, skipping.\n"));
return;
}
status = printer_list_mark_reload();
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to mark printer list for reload!\n"));

26
source3/printing/printer_list.c
View File

@ -215,6 +215,32 @@ done:
return status;
}
bool printer_list_need_refresh(void)
{
NTSTATUS status;
time_t now = time(NULL);
time_t last_refresh;
status = printer_list_get_last_refresh(&last_refresh);
if (!NT_STATUS_IS_OK(status)) {
return true;
}
if (now > last_refresh) {
/* if refresh occurred last than 1 seconds ago,
* then we probably don't need to refresh */
if ((now - last_refresh) < 1) {
return false;
}
} else {
/* last_refresh newer than now, wow, someone just updated the
* cache under our nose, do not do again. */
return false;
}
return true;
}
NTSTATUS printer_list_mark_reload(void)
{
struct db_context *db;

2
source3/printing/printer_list.h
View File

@ -39,4 +39,6 @@ NTSTATUS printer_list_clean_old(void);
NTSTATUS printer_list_run_fn(void (*fn)(const char *, const char *, void *),
void *private_data);
bool printer_list_need_refresh(void);
#endif /* _PRINTER_LIST_H_ */