empire/empserver
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Update timestamps in privately mapped tables, too

Browse source 
Commit f33b96b1 made ef_flush(), ef_write() and ef_extend() update
timestamps automatically.  Change ef_write() and ef_extend() to do
that even when table is privately mapped, by making do_write() cope
with privately mapped tables.  Current users don't care, but it's a
saner interface.
This commit is contained in:
Markus Armbruster 2008-05-17 18:56:38 +02:00
parent c3d5771054
commit d39a1f11cc
1 changed files with 11 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

17
src/lib/common/file.c
View file

@ -216,7 +216,8 @@ ef_close(int type)
/*
* Flush table TYPE (EF_SECTOR, ...) to disk.
* Does nothing if the table is privately mapped.
* Do nothing if the table is privately mapped.
* Update timestamps of written elements if table is EFF_TYPED.
* Return non-zero on success, zero on failure.
*/
int
@ -352,7 +353,8 @@ fillcache(struct empfile *ep, int id)
/*
* Write COUNT elements starting at ID from BUF to file-backed EP.
* Set the timestamp to NOW if the table has those.
* Set the timestamp to NOW if the table is EFF_TYPED.
* Don't actually write if table is privately mapped.
* Return 0 on success, -1 on error (file may be corrupt then).
*/
static int
@ -362,8 +364,7 @@ do_write(struct empfile *ep, void *buf, int id, int count, time_t now)
char *p;
struct emptypedstr *elt;
if (CANT_HAPPEN(ep->fd < 0 || (ep->flags & EFF_PRIVATE)
|| id < 0 || count < 0))
if (CANT_HAPPEN(ep->fd < 0 || id < 0 || count < 0))
return -1;
if (ep->flags & EFF_TYPED) {
@ -381,6 +382,9 @@ do_write(struct empfile *ep, void *buf, int id, int count, time_t now)
}
}
if (ep->flags & EFF_PRIVATE)
return 0;
if (lseek(ep->fd, id * ep->size, SEEK_SET) == (off_t)-1) {
logerror("Error seeking %s to elt %d (%s)",
ep->file, id, strerror(errno));
@ -411,6 +415,7 @@ do_write(struct empfile *ep, void *buf, int id, int count, time_t now)
/*
* Write element ID into table TYPE from buffer FROM.
* FIXME pass buffer size!
* Update timestamp in FROM if table is EFF_TYPED.
* If table is file-backed and not privately mapped, write through
* cache straight to disk.
* Cannot write beyond the end of fully cached table (flags & EFF_MEM).
@ -432,7 +437,7 @@ ef_write(int type, int id, void *from)
ep->prewrite(id, from);
if (CANT_HAPPEN((ep->flags & EFF_MEM) ? id >= ep->fids : id > ep->fids))
return 0; /* not implemented */
if (ep->fd >= 0 && !(ep->flags & EFF_PRIVATE)) {
if (ep->fd >= 0) {
if (do_write(ep, from, id, 1, time(NULL)) < 0)
return 0;
}
@ -484,7 +489,7 @@ ef_extend(int type, int count)
}
p = ep->cache + id * ep->size;
do_blank(ep, p, id, count);
if (ep->fd >= 0 && !(ep->flags & EFF_PRIVATE)) {
if (ep->fd >= 0) {
if (do_write(ep, p, id, count, now) < 0)
return 0;
}