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Rewrite registry.h

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This rewrites registry.h, removing all the macros and replacing it
with relatively ordinary template classes.  The result is less code
than the previous setup.  It replaces large macros with a relatively
straightforward C++ class, and now manages its own cleanup.

The existing type-safe "key" class is replaced with the equivalent
template class.  This approach ended up requiring relatively few
changes to the users of the registry code in gdb -- code using the key
system just required a small change to the key's declaration.

All existing users of the old C-like API are now converted to use the
type-safe API.  This mostly involved changing explicit deletion
functions to be an operator() in a deleter class.

The old "save/free" two-phase process is removed, and replaced with a
single "free" phase.  No existing code used both phases.

The old "free" callbacks took a parameter for the enclosing container
object.  However, this wasn't truly needed and is removed here as
well.
This commit is contained in:
Tom Tromey
2020-10-18 11:38:10 -06:00
parent 8f83e7b926
commit 08b8a139c9
64 changed files with 664 additions and 1052 deletions
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6
gdb/gdbtypes.c
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@@ -6078,7 +6078,7 @@ typedef std::vector<std::unique_ptr<fixed_point_type_info>>
fixed_point_type_storage;
/* Key used for managing the storage of fixed-point type info. */
static const struct objfile_key<fixed_point_type_storage>
static const struct registry<objfile>::key<fixed_point_type_storage>
fixed_point_objfile_key;
/* See gdbtypes.h. */
@@ -6305,8 +6305,8 @@ gdbtypes_post_init (struct gdbarch *gdbarch)
/* This set of objfile-based types is intended to be used by symbol
readers as basic types. */
static const struct objfile_key<struct objfile_type,
gdb::noop_deleter<struct objfile_type>>
static const registry<objfile>::key<struct objfile_type,
gdb::noop_deleter<struct objfile_type>>
objfile_type_data;
const struct objfile_type *