X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=lib%2Fpagecache.c;h=6a2643dfae7547caceae0098ec926b076fd8f141;hb=3b44cc5e0858a329f647bee0617fbab117ea5ea9;hp=5acbca4b437e539a37faf813adc6908cc4eda145;hpb=1571781022499a9d0c32d249f89945d034d1cbff;p=libucw.git

diff --git a/lib/pagecache.c b/lib/pagecache.c
index 5acbca4b..6a2643df 100644
--- a/lib/pagecache.c
+++ b/lib/pagecache.c
@@ -1,7 +1,10 @@
 /*
  *	Sherlock Library -- File Page Cache
  *
- *	(c) 1999--2000 Martin Mares <mj@ucw.cz>
+ *	(c) 1999--2002 Martin Mares <mj@ucw.cz>
+ *
+ *	This software may be freely distributed and used according to the terms
+ *	of the GNU Lesser General Public License.
  */
 
 #include "lib/lib.h"
@@ -13,6 +16,7 @@
 #include <string.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <alloca.h>
 
 struct page_cache {
   list free_pages;			/* LRU queue of free non-dirty pages */
@@ -39,10 +43,9 @@ struct page_cache {
 struct page_cache *
 pgc_open(uns page_size, uns max_pages)
 {
-  struct page_cache *c = xmalloc(sizeof(struct page_cache));
+  struct page_cache *c = xmalloc_zero(sizeof(struct page_cache));
   uns i;
 
-  bzero(c, sizeof(*c));
   init_list(&c->free_pages);
   init_list(&c->locked_pages);
   init_list(&c->dirty_pages);
@@ -65,8 +68,8 @@ pgc_close(struct page_cache *c)
   ASSERT(EMPTY_LIST(c->locked_pages));
   ASSERT(EMPTY_LIST(c->dirty_pages));
   ASSERT(EMPTY_LIST(c->free_pages));
-  free(c->hash_table);
-  free(c);
+  xfree(c->hash_table);
+  xfree(c);
 }
 
 static void
@@ -105,7 +108,7 @@ flush_page(struct page_cache *c, struct page *p)
 #ifdef SHERLOCK_HAVE_PREAD
   s = sh_pwrite(p->fd, p->data, c->page_size, p->pos);
 #else
-  if (c->pos != p->pos || c->pos_fd != p->fd)
+  if (c->pos != p->pos || c->pos_fd != (int) p->fd)
     sh_seek(p->fd, p->pos, SEEK_SET);
   s = write(p->fd, p->data, c->page_size);
   c->pos = p->pos + s;
@@ -140,7 +143,7 @@ static void
 flush_pages(struct page_cache *c, uns force)
 {
   uns cnt = 0;
-  uns max = force ? ~0 : c->free_count / 2; /* FIXME: Needs tuning */
+  uns max = force ? ~0U : c->free_count / 2;
   uns i;
   struct page *p, *q, **req, **rr;
 
@@ -251,7 +254,7 @@ pgc_cleanup(struct page_cache *c)
       rem_node(&p->hn);
       c->free_count--;
       c->total_count--;
-      free(p);
+      xfree(p);
     }
   ASSERT(!c->free_count);
 }
@@ -282,7 +285,7 @@ pgc_read(struct page_cache *c, int fd, sh_off_t pos)
 #ifdef SHERLOCK_HAVE_PREAD
       s = sh_pread(fd, p->data, c->page_size, pos);
 #else
-      if (c->pos != pos || c->pos_fd != fd)
+      if (c->pos != pos || c->pos_fd != (int)fd)
 	sh_seek(fd, pos, SEEK_SET);
       s = read(fd, p->data, c->page_size);
       c->pos = pos + s;
@@ -340,7 +343,7 @@ pgc_put(struct page_cache *c, struct page *p)
   else
     {
       rem_node(&p->hn);
-      free(p);
+      xfree(p);
       c->total_count--;
     }
 }