void
FileInvalidate(File file)
{
Assert(FileIsValid(file));
if (!FileIsNotOpen(file))
LruDelete(file);
}
/*
* Called when we get a shared invalidation message on some relation.
*/
void
FileInvalidate(File file)
{
if (!FileIsNotOpen(file)) {
LruDelete(file);
}
}
void
closeAllVfds()
{
int i;
for (i=0; i<SizeVfdCache; i++) {
if (!FileIsNotOpen(i))
LruDelete(i);
}
}
static void
AssertLruRoom()
{
DO_DB(printf("DEBUG: AssertLruRoom (FreeFd = %d)\n",
FreeFd));
if (FreeFd <= 0 || nfile >= MAXFILES) {
LruDelete(VfdCache[0].lruMoreRecently);
}
}
/*
* closeAllVfds
*
* Force all VFDs into the physically-closed state, so that the fewest
* possible number of kernel file descriptors are in use. There is no
* change in the logical state of the VFDs.
*/
void
closeAllVfds(void)
{
Index i;
if (SizeVfdCache > 0)
{
Assert(FileIsNotOpen(0)); /* Make sure ring not corrupted */
for (i = 1; i < SizeVfdCache; i++)
{
if (!FileIsNotOpen(i))
LruDelete(i);
}
}
}
static bool
ReleaseLruFile(void)
{
DO_DB(elog(LOG, "ReleaseLruFile. Opened %d", nfile));
if (nfile > 0)
{
/*
* There are opened files and so there should be at least one used vfd
* in the ring.
*/
Assert(VfdCache[0].lruMoreRecently != 0);
LruDelete(VfdCache[0].lruMoreRecently);
return true; /* freed a file */
}
return false; /* no files available to free */
}
