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tag-returning: Adopted tag-returns in mtree traversals

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- lfs3_mtree_traverse_
- lfs3_mtree_traverse
- lfs3_mtree_gc

I like this one if only for the reduced API noise. All of these layers
need to inspect the tag to know what to do, moving the tag to the return
position means less mucking around with points in our core traversal
logic.

Shaves off a bit more code:

           code          stack          ctx
  before: 36348           2336          656
  after:  36260 (-0.2%)   2336 (+0.0%)  656 (+0.0%)
This commit is contained in:
Christopher Haster
2025-07-17 16:12:17 -05:00
parent bfab282b9e
commit a549654618
3 changed files with 119 additions and 144 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tests/test_mtree.toml
+40 -40
View File
@@ -3674,12 +3674,12 @@ code = '''
// a bit hacky, but this catches infinite loops
assert(i < 2*BLOCK_COUNT);
lfs3_tag_t tag;
lfs3_stag_t tag;
lfs3_bptr_t bptr;
int err = lfs3_mtree_traverse(&lfs3, &t,
&tag, &bptr);
assert(!err || err == LFS3_ERR_NOENT);
if (err == LFS3_ERR_NOENT) {
tag = lfs3_mtree_traverse(&lfs3, &t,
&bptr);
assert(tag >= 0 || tag == LFS3_ERR_NOENT);
if (tag == LFS3_ERR_NOENT) {
break;
}
@@ -3796,12 +3796,12 @@ code = '''
// a bit hacky, but this catches infinite loops
assert(i < 2*BLOCK_COUNT);
lfs3_tag_t tag;
lfs3_stag_t tag;
lfs3_bptr_t bptr;
int err = lfs3_mtree_traverse(&lfs3, &t,
&tag, &bptr);
assert(!err || err == LFS3_ERR_NOENT);
if (err == LFS3_ERR_NOENT) {
tag = lfs3_mtree_traverse(&lfs3, &t,
&bptr);
assert(tag >= 0 || tag == LFS3_ERR_NOENT);
if (tag == LFS3_ERR_NOENT) {
break;
}
@@ -3944,12 +3944,12 @@ code = '''
// a bit hacky, but this catches infinite loops
assert(i < 2*BLOCK_COUNT);
lfs3_tag_t tag;
lfs3_stag_t tag;
lfs3_bptr_t bptr;
int err = lfs3_mtree_traverse(&lfs3, &t,
&tag, &bptr);
assert(!err || err == LFS3_ERR_NOENT);
if (err == LFS3_ERR_NOENT) {
tag = lfs3_mtree_traverse(&lfs3, &t,
&bptr);
assert(tag >= 0 || tag == LFS3_ERR_NOENT);
if (tag == LFS3_ERR_NOENT) {
break;
}
@@ -4115,12 +4115,12 @@ code = '''
// a bit hacky, but this catches infinite loops
assert(i < 2*BLOCK_COUNT);
lfs3_tag_t tag;
lfs3_stag_t tag;
lfs3_bptr_t bptr;
int err = lfs3_mtree_traverse(&lfs3, &t,
&tag, &bptr);
assert(!err || err == LFS3_ERR_NOENT);
if (err == LFS3_ERR_NOENT) {
tag = lfs3_mtree_traverse(&lfs3, &t,
&bptr);
assert(tag >= 0 || tag == LFS3_ERR_NOENT);
if (tag == LFS3_ERR_NOENT) {
break;
}
@@ -4266,12 +4266,12 @@ code = '''
// a bit hacky, but this catches infinite loops
assert(i < 2*BLOCK_COUNT);
lfs3_tag_t tag;
lfs3_stag_t tag;
lfs3_bptr_t bptr;
int err = lfs3_mtree_traverse(&lfs3, &t,
&tag, &bptr);
assert(!err || err == LFS3_ERR_NOENT);
if (err == LFS3_ERR_NOENT) {
tag = lfs3_mtree_traverse(&lfs3, &t,
&bptr);
assert(tag >= 0 || tag == LFS3_ERR_NOENT);
if (tag == LFS3_ERR_NOENT) {
break;
}
@@ -4392,12 +4392,12 @@ code = '''
// a bit hacky, but this catches infinite loops
assert(i < 2*BLOCK_COUNT);
lfs3_tag_t tag;
lfs3_stag_t tag;
lfs3_bptr_t bptr;
int err = lfs3_mtree_traverse(&lfs3, &t,
&tag, &bptr);
assert(!err || err == LFS3_ERR_NOENT);
if (err == LFS3_ERR_NOENT) {
tag = lfs3_mtree_traverse(&lfs3, &t,
&bptr);
assert(tag >= 0 || tag == LFS3_ERR_NOENT);
if (tag == LFS3_ERR_NOENT) {
break;
}
@@ -4562,12 +4562,12 @@ code = '''
// a bit hacky, but this catches infinite loops
assert(i < 2*BLOCK_COUNT);
lfs3_tag_t tag;
lfs3_stag_t tag;
lfs3_bptr_t bptr;
int err = lfs3_mtree_traverse(&lfs3, &t,
&tag, &bptr);
assert(!err || err == LFS3_ERR_NOENT);
if (err == LFS3_ERR_NOENT) {
tag = lfs3_mtree_traverse(&lfs3, &t,
&bptr);
assert(tag >= 0 || tag == LFS3_ERR_NOENT);
if (tag == LFS3_ERR_NOENT) {
break;
}
@@ -4693,12 +4693,12 @@ code = '''
// assert that we detect the cycle in a reasonable number of iterations
assert(i < 2*BLOCK_COUNT);
lfs3_tag_t tag;
lfs3_stag_t tag;
lfs3_bptr_t bptr;
int err = lfs3_mtree_traverse(&lfs3, &t,
&tag, &bptr);
assert(!err || err == LFS3_ERR_CORRUPT);
if (err == LFS3_ERR_CORRUPT) {
tag = lfs3_mtree_traverse(&lfs3, &t,
&bptr);
assert(tag >= 0 || tag == LFS3_ERR_CORRUPT);
if (tag == LFS3_ERR_CORRUPT) {
break;
}