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* bcache.h: Update copyright.

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(struct bstring, struct bcache): Move definition to "bcache.c".
Replaced by opaque declaration.
(bcache_xfree): Replace free_bcache.
(bcache_xmalloc, bcache_memory_used): Declare.

* bcache.c: Update copyright.
(struct bstring, struct bcache): Moved to here from "bcache.h".
Update comments.
(bcache_xmalloc, bcache_memory_used): New functions.
(bcache_xfree): Replace function free_bcache.

* Makefile.in (objfiles.o): Add $(bcache_h).
(objfiles_h): Remove $(bcache_h).
(symfile.o): Add $(bcache_h).

* symmisc.c: Update copyright.
(print_symbol_bcache_statistics): Pass psymbol_cache by value.
(print_objfile_statistics): Use bcache_memory_used.

* symfile.c: Include "bcache.h".
(reread_symbols): Use bcache_xfree.
(reread_symbols): Use bcache_xmalloc and bcache_xfree.
(add_psymbol_to_list): Pass psymbol_cache by value.
(add_psymbol_with_dem_name_to_list): Ditto.

* objfiles.h: Update copyright.
(struct bcache): Declare opaque.  Do not include "bcache.h".
(struct objfile): Change psymbol_cache and macro_cache to ``struct
bcache'' pointers.
* dwarf2read.c (macro_start_file): Pass macro_cache by value.

* objfiles.c: Include "bcache.h".  Update copyright.
(allocate_objfile): Use bcache_xmalloc to create psymbol_cache and
macro_cache.
(free_objfile): Use bcache_xfree.
This commit is contained in:
Andrew Cagney
2002-07-12 15:23:10 +00:00
parent 120d20f266
commit af5f3db67c
9 changed files with 154 additions and 93 deletions
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62
gdb/bcache.h
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@@ -1,7 +1,8 @@
/* Include file cached obstack implementation.
Written by Fred Fish <fnf@cygnus.com>
Rewritten by Jim Blandy <jimb@cygnus.com>
Copyright 1999, 2000 Free Software Foundation, Inc.
Copyright 1999, 2000, 2002 Free Software Foundation, Inc.
This file is part of GDB.
@@ -63,68 +64,27 @@
any chance of sharing its space with future duplicates. */
/* The type used to hold a single bcache string. The user data is
stored in d.data. Since it can be any type, it needs to have the
same alignment as the most strict alignment of any type on the host
machine. I don't know of any really correct way to do this in
stock ANSI C, so just do it the same way obstack.h does.
It would be nicer to have this stuff hidden away in bcache.c, but
struct objstack contains a struct bcache directly --- not a pointer
to one --- and then the memory-mapped stuff makes this a real pain.
We don't strictly need to expose struct bstring, but it's better to
have it all in one place. */
struct bstring {
struct bstring *next;
size_t length;
union
{
char data[1];
double dummy;
}
d;
};
/* The structure for a bcache itself.
To initialize a bcache, just fill it with zeros. */
struct bcache {
/* All the bstrings are allocated here. */
struct obstack cache;
/* How many hash buckets we're using. */
unsigned int num_buckets;
/* Hash buckets. This table is allocated using malloc, so when we
grow the table we can return the old table to the system. */
struct bstring **bucket;
/* Statistics. */
unsigned long unique_count; /* number of unique strings */
long total_count; /* total number of strings cached, including dups */
long unique_size; /* size of unique strings, in bytes */
long total_size; /* total number of bytes cached, including dups */
long structure_size; /* total size of bcache, including infrastructure */
};
struct bcache;
/* Find a copy of the LENGTH bytes at ADDR in BCACHE. If BCACHE has
never seen those bytes before, add a copy of them to BCACHE. In
either case, return a pointer to BCACHE's copy of that string. */
extern void *bcache (const void *addr, int length, struct bcache *bcache);
/* Free all the storage that BCACHE refers to. The result is a valid,
but empty, bcache. This does not free BCACHE itself, since that
might be part of some larger object. */
extern void free_bcache (struct bcache *bcache);
/* Free all the storage used by BCACHE. */
extern void bcache_xfree (struct bcache *bcache);
/* Create a new bcache object. */
extern struct bcache *bcache_xmalloc (void);
/* Print statistics on BCACHE's memory usage and efficacity at
eliminating duplication. TYPE should be a string describing the
kind of data BCACHE holds. Statistics are printed using
`printf_filtered' and its ilk. */
extern void print_bcache_statistics (struct bcache *bcache, char *type);
extern int bcache_memory_used (struct bcache *bcache);
/* The hash function */
extern unsigned long hash(const void *addr, int length);
#endif /* BCACHE_H */