[PATCH v5 0/4] alist: Implement a pointer list / array of structs

[Simon Glass]

This data structure provides a list of pointers / array of structures.
I was planning to use it for the lmb restructure, to allow it to
support any number of entries, but then I gave up on it.

There are quite a few places in U-Boot where such a list would be
useful, since it supports growing the array.

The series includes a patch to convert an existing function to use
this.

It adds a little under 300 bytes of code with Thumb2.

With this version, use of realloc() is option and off by default. This
reduces the size growth on xilinx_versal_mini_emmc0 (aarch64) from
1765 bytes to 636, for the str_to_list() patch.

The str_to_list() patch is marked as RFC since I beleive we have decided
not to apply it.

Example:

 struct my_struct obj;
 struct my_struct *ptr = alist_add(&lst, &obj, struct my_struct);

 // now ptr is in the list

[1] https://patchwork.ozlabs.org/project/uboot/list/?series=371258&state=*

Changes in v5:
- Drop use of realloc() altogether, since the benefit is small
- Add alist_add_placeholder()
- Drop type argument for alist_add()

Changes in v4:
- Avoid using realloc() unless specifically enabled by Kconfig

Changes in v3:
- Add prototype for alist_expand_by()
- Update for alist_add() API change

Changes in v2:
- Fix 'typeee' typo
- Make alist_get_ptr() take a const alist *
- Make alist_add() take a struct rather than a pointer
- Declare alist_expand_by() as static

Simon Glass (4):
  malloc: Support testing with realloc()
  lib: Handle a special case with str_to_list()
  alist: Add support for an allocated pointer list
  RFC: lib: Convert str_to_list() to use alist

 common/dlmalloc.c |   4 +
 include/alist.h   | 228 +++++++++++++++++++++++++++++++++++++++++++
 lib/Makefile      |   1 +
 lib/alist.c       | 158 ++++++++++++++++++++++++++++++
 lib/strto.c       |  33 ++++---
 test/lib/Makefile |   1 +
 test/lib/alist.c  | 242 ++++++++++++++++++++++++++++++++++++++++++++++
 test/str_ut.c     |   4 +-
 8 files changed, 654 insertions(+), 17 deletions(-)
 create mode 100644 include/alist.h
 create mode 100644 lib/alist.c
 create mode 100644 test/lib/alist.c

-- 
2.34.1