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authorAlan Modra <amodra@gmail.com>2005-10-27 03:22:13 +0000
committerAlan Modra <amodra@gmail.com>2005-10-27 03:22:13 +0000
commitd0fdd288c7403a936f2a8e8cb52edb2076fb4dc3 (patch)
tree85707385ee399d4c95b0b2e81966b5913ba25f39 /bfd
parent2ca673f68701081bad0e67ba87445ad8e5effb1b (diff)
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* cache.c: Reorganize file to avoid forward reference.
Diffstat (limited to 'bfd')
-rw-r--r--bfd/ChangeLog4
-rw-r--r--bfd/cache.c379
2 files changed, 192 insertions, 191 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 64440a4..0a3b248 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,7 @@
+2005-10-27 Alan Modra <amodra@bigpond.net.au>
+
+ * cache.c: Reorganize file to avoid forward reference.
+
2005-10-26 Alan Modra <amodra@bigpond.net.au>
* cache.c (bfd_cache_lookup_worker): Don't abort on failing to
diff --git a/bfd/cache.c b/bfd/cache.c
index 13f4a07..284b443 100644
--- a/bfd/cache.c
+++ b/bfd/cache.c
@@ -45,8 +45,195 @@ SUBSECTION
#include "libbfd.h"
#include "libiberty.h"
-static bfd_boolean bfd_cache_delete (bfd *);
+/*
+INTERNAL_FUNCTION
+ BFD_CACHE_MAX_OPEN macro
+
+DESCRIPTION
+ The maximum number of files which the cache will keep open at
+ one time.
+
+.#define BFD_CACHE_MAX_OPEN 10
+
+*/
+
+/* The number of BFD files we have open. */
+
+static int open_files;
+
+/*
+INTERNAL_FUNCTION
+ bfd_last_cache
+
+SYNOPSIS
+ extern bfd *bfd_last_cache;
+
+DESCRIPTION
+ Zero, or a pointer to the topmost BFD on the chain. This is
+ used by the <<bfd_cache_lookup>> macro in @file{libbfd.h} to
+ determine when it can avoid a function call.
+*/
+
+bfd *bfd_last_cache = NULL;
+/* Insert a BFD into the cache. */
+
+static void
+insert (bfd *abfd)
+{
+ if (bfd_last_cache == NULL)
+ {
+ abfd->lru_next = abfd;
+ abfd->lru_prev = abfd;
+ }
+ else
+ {
+ abfd->lru_next = bfd_last_cache;
+ abfd->lru_prev = bfd_last_cache->lru_prev;
+ abfd->lru_prev->lru_next = abfd;
+ abfd->lru_next->lru_prev = abfd;
+ }
+ bfd_last_cache = abfd;
+}
+
+/* Remove a BFD from the cache. */
+
+static void
+snip (bfd *abfd)
+{
+ abfd->lru_prev->lru_next = abfd->lru_next;
+ abfd->lru_next->lru_prev = abfd->lru_prev;
+ if (abfd == bfd_last_cache)
+ {
+ bfd_last_cache = abfd->lru_next;
+ if (abfd == bfd_last_cache)
+ bfd_last_cache = NULL;
+ }
+}
+
+/* Close a BFD and remove it from the cache. */
+
+static bfd_boolean
+bfd_cache_delete (bfd *abfd)
+{
+ bfd_boolean ret;
+
+ if (fclose ((FILE *) abfd->iostream) == 0)
+ ret = TRUE;
+ else
+ {
+ ret = FALSE;
+ bfd_set_error (bfd_error_system_call);
+ }
+
+ snip (abfd);
+
+ abfd->iostream = NULL;
+ --open_files;
+
+ return ret;
+}
+
+/* We need to open a new file, and the cache is full. Find the least
+ recently used cacheable BFD and close it. */
+
+static bfd_boolean
+close_one (void)
+{
+ register bfd *kill;
+
+ if (bfd_last_cache == NULL)
+ kill = NULL;
+ else
+ {
+ for (kill = bfd_last_cache->lru_prev;
+ ! kill->cacheable;
+ kill = kill->lru_prev)
+ {
+ if (kill == bfd_last_cache)
+ {
+ kill = NULL;
+ break;
+ }
+ }
+ }
+
+ if (kill == NULL)
+ {
+ /* There are no open cacheable BFD's. */
+ return TRUE;
+ }
+
+ kill->where = real_ftell ((FILE *) kill->iostream);
+
+ return bfd_cache_delete (kill);
+}
+
+/*
+ INTERNAL_FUNCTION
+ bfd_cache_lookup
+
+ DESCRIPTION
+ Check to see if the required BFD is the same as the last one
+ looked up. If so, then it can use the stream in the BFD with
+ impunity, since it can't have changed since the last lookup;
+ otherwise, it has to perform the complicated lookup function.
+
+ .#define bfd_cache_lookup(x) \
+ . ((x) == bfd_last_cache ? \
+ . (FILE *) (bfd_last_cache->iostream): \
+ . bfd_cache_lookup_worker (x))
+
+ */
+
+/*
+INTERNAL_FUNCTION
+ bfd_cache_lookup_worker
+
+SYNOPSIS
+ FILE *bfd_cache_lookup_worker (bfd *abfd);
+
+DESCRIPTION
+ Called when the macro <<bfd_cache_lookup>> fails to find a
+ quick answer. Find a file descriptor for @var{abfd}. If
+ necessary, it open it. If there are already more than
+ <<BFD_CACHE_MAX_OPEN>> files open, it tries to close one first, to
+ avoid running out of file descriptors. It will return NULL
+ if it is unable to (re)open the @var{abfd}.
+*/
+
+FILE *
+bfd_cache_lookup_worker (bfd *abfd)
+{
+ bfd *orig_bfd = abfd;
+ if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ abort ();
+
+ if (abfd->my_archive)
+ abfd = abfd->my_archive;
+
+ if (abfd->iostream != NULL)
+ {
+ /* Move the file to the start of the cache. */
+ if (abfd != bfd_last_cache)
+ {
+ snip (abfd);
+ insert (abfd);
+ }
+ return (FILE *) abfd->iostream;
+ }
+
+ if (bfd_open_file (abfd) == NULL)
+ ;
+ else if (real_fseek ((FILE *) abfd->iostream, abfd->where, SEEK_SET) != 0)
+ bfd_set_error (bfd_error_system_call);
+ else
+ return (FILE *) abfd->iostream;
+
+ (*_bfd_error_handler) (_("reopening %B: %s\n"),
+ orig_bfd, bfd_errmsg (bfd_get_error ()));
+ return NULL;
+}
static file_ptr
cache_btell (struct bfd *abfd)
@@ -175,147 +362,6 @@ static const struct bfd_iovec cache_iovec = {
/*
INTERNAL_FUNCTION
- BFD_CACHE_MAX_OPEN macro
-
-DESCRIPTION
- The maximum number of files which the cache will keep open at
- one time.
-
-.#define BFD_CACHE_MAX_OPEN 10
-
-*/
-
-/* The number of BFD files we have open. */
-
-static int open_files;
-
-/*
-INTERNAL_FUNCTION
- bfd_last_cache
-
-SYNOPSIS
- extern bfd *bfd_last_cache;
-
-DESCRIPTION
- Zero, or a pointer to the topmost BFD on the chain. This is
- used by the <<bfd_cache_lookup>> macro in @file{libbfd.h} to
- determine when it can avoid a function call.
-*/
-
-bfd *bfd_last_cache = NULL;
-
-/*
- INTERNAL_FUNCTION
- bfd_cache_lookup
-
- DESCRIPTION
- Check to see if the required BFD is the same as the last one
- looked up. If so, then it can use the stream in the BFD with
- impunity, since it can't have changed since the last lookup;
- otherwise, it has to perform the complicated lookup function.
-
- .#define bfd_cache_lookup(x) \
- . ((x) == bfd_last_cache ? \
- . (FILE *) (bfd_last_cache->iostream): \
- . bfd_cache_lookup_worker (x))
-
- */
-
-/* Insert a BFD into the cache. */
-
-static void
-insert (bfd *abfd)
-{
- if (bfd_last_cache == NULL)
- {
- abfd->lru_next = abfd;
- abfd->lru_prev = abfd;
- }
- else
- {
- abfd->lru_next = bfd_last_cache;
- abfd->lru_prev = bfd_last_cache->lru_prev;
- abfd->lru_prev->lru_next = abfd;
- abfd->lru_next->lru_prev = abfd;
- }
- bfd_last_cache = abfd;
-}
-
-/* Remove a BFD from the cache. */
-
-static void
-snip (bfd *abfd)
-{
- abfd->lru_prev->lru_next = abfd->lru_next;
- abfd->lru_next->lru_prev = abfd->lru_prev;
- if (abfd == bfd_last_cache)
- {
- bfd_last_cache = abfd->lru_next;
- if (abfd == bfd_last_cache)
- bfd_last_cache = NULL;
- }
-}
-
-/* We need to open a new file, and the cache is full. Find the least
- recently used cacheable BFD and close it. */
-
-static bfd_boolean
-close_one (void)
-{
- register bfd *kill;
-
- if (bfd_last_cache == NULL)
- kill = NULL;
- else
- {
- for (kill = bfd_last_cache->lru_prev;
- ! kill->cacheable;
- kill = kill->lru_prev)
- {
- if (kill == bfd_last_cache)
- {
- kill = NULL;
- break;
- }
- }
- }
-
- if (kill == NULL)
- {
- /* There are no open cacheable BFD's. */
- return TRUE;
- }
-
- kill->where = real_ftell ((FILE *) kill->iostream);
-
- return bfd_cache_delete (kill);
-}
-
-/* Close a BFD and remove it from the cache. */
-
-static bfd_boolean
-bfd_cache_delete (bfd *abfd)
-{
- bfd_boolean ret;
-
- if (fclose ((FILE *) abfd->iostream) == 0)
- ret = TRUE;
- else
- {
- ret = FALSE;
- bfd_set_error (bfd_error_system_call);
- }
-
- snip (abfd);
-
- abfd->iostream = NULL;
- --open_files;
-
- return ret;
-}
-
-/*
-INTERNAL_FUNCTION
bfd_cache_init
SYNOPSIS
@@ -480,52 +526,3 @@ bfd_open_file (bfd *abfd)
return (FILE *) abfd->iostream;
}
-
-/*
-INTERNAL_FUNCTION
- bfd_cache_lookup_worker
-
-SYNOPSIS
- FILE *bfd_cache_lookup_worker (bfd *abfd);
-
-DESCRIPTION
- Called when the macro <<bfd_cache_lookup>> fails to find a
- quick answer. Find a file descriptor for @var{abfd}. If
- necessary, it open it. If there are already more than
- <<BFD_CACHE_MAX_OPEN>> files open, it tries to close one first, to
- avoid running out of file descriptors. It will return NULL
- if it is unable to (re)open the @var{abfd}.
-*/
-
-FILE *
-bfd_cache_lookup_worker (bfd *abfd)
-{
- bfd *orig_bfd = abfd;
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
- abort ();
-
- if (abfd->my_archive)
- abfd = abfd->my_archive;
-
- if (abfd->iostream != NULL)
- {
- /* Move the file to the start of the cache. */
- if (abfd != bfd_last_cache)
- {
- snip (abfd);
- insert (abfd);
- }
- return (FILE *) abfd->iostream;
- }
-
- if (bfd_open_file (abfd) == NULL)
- ;
- else if (real_fseek ((FILE *) abfd->iostream, abfd->where, SEEK_SET) != 0)
- bfd_set_error (bfd_error_system_call);
- else
- return (FILE *) abfd->iostream;
-
- (*_bfd_error_handler) (_("reopening %B: %s\n"),
- orig_bfd, bfd_errmsg (bfd_get_error ()));
- return NULL;
-}