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Merge pull request #912 from littlefs-project/relaxed-lookahead

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Relaxed lookahead alignment, other internal block alloc readability improvements
This commit is contained in:
Christopher Haster
2024-01-19 12:27:14 -06:00
committed by GitHub
parent 1195d606ae 60567677b9
commit ed7bd05435
4 changed files with 90 additions and 71 deletions
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19
lfs.h
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@@ -224,7 +224,7 @@ struct lfs_config {
// Size of the lookahead buffer in bytes. A larger lookahead buffer
// increases the number of blocks found during an allocation pass. The
// lookahead buffer is stored as a compact bitmap, so each byte of RAM
// can track 8 blocks. Must be a multiple of 8.
// can track 8 blocks.
lfs_size_t lookahead_size;
// Optional statically allocated read buffer. Must be cache_size.
@@ -235,9 +235,8 @@ struct lfs_config {
// By default lfs_malloc is used to allocate this buffer.
void *prog_buffer;
// Optional statically allocated lookahead buffer. Must be lookahead_size
// and aligned to a 32-bit boundary. By default lfs_malloc is used to
// allocate this buffer.
// Optional statically allocated lookahead buffer. Must be lookahead_size.
// By default lfs_malloc is used to allocate this buffer.
void *lookahead_buffer;
// Optional upper limit on length of file names in bytes. No downside for
@@ -428,13 +427,13 @@ typedef struct lfs {
lfs_gstate_t gdisk;
lfs_gstate_t gdelta;
struct lfs_free {
lfs_block_t off;
struct lfs_lookahead {
lfs_block_t start;
lfs_block_t size;
lfs_block_t i;
lfs_block_t ack;
uint32_t *buffer;
} free;
lfs_block_t next;
lfs_block_t ckpoint;
uint8_t *buffer;
} lookahead;
const struct lfs_config *cfg;
lfs_size_t block_count;