diff options
| author | Namyoon Woo <namyoon@chromium.org> | 2019-04-17 12:54:48 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2019-05-02 21:02:52 -0700 |
| commit | 8e8dd8a8e4a0556b67f2ceed6b0fe1547989d924 (patch) | |
| tree | 94d57fdffce3c138813fcc38cd84f3fd674df880 /common/queue.c | |
| parent | 781170c47b6078e1f9588d2b3fa1c23d208b0e88 (diff) | |
| download | chrome-ec-8e8dd8a8e4a0556b67f2ceed6b0fe1547989d924.tar.gz | |
cr50: add buffer_units_mask member into struct queue
"q->buffer_units - 1" is performed many times to wrap head and/or
tail. It should be calculated once.
BUG=None
BRANCH=cr50
TEST=None
Change-Id: I9714147d5a97afd7aaba00d31a8b10bad50d0942
Signed-off-by: Namyoon Woo <namyoon@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1572444
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Diffstat (limited to 'common/queue.c')
| -rw-r--r-- | common/queue.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/common/queue.c b/common/queue.c index 67934ca74e..584d0fbdfa 100644 --- a/common/queue.c +++ b/common/queue.c @@ -70,8 +70,8 @@ int queue_is_full(struct queue const *q) struct queue_chunk queue_get_write_chunk(struct queue const *q) { - size_t head = q->state->head & (q->buffer_units - 1); - size_t tail = q->state->tail & (q->buffer_units - 1); + size_t head = q->state->head & q->buffer_units_mask; + size_t tail = q->state->tail & q->buffer_units_mask; size_t last = (queue_is_full(q) ? tail : /* Full */ ((tail < head) ? head : /* Wrapped */ q->buffer_units)); /* Normal | Empty */ @@ -84,8 +84,8 @@ struct queue_chunk queue_get_write_chunk(struct queue const *q) struct queue_chunk queue_get_read_chunk(struct queue const *q) { - size_t head = q->state->head & (q->buffer_units - 1); - size_t tail = q->state->tail & (q->buffer_units - 1); + size_t head = q->state->head & q->buffer_units_mask; + size_t tail = q->state->tail & q->buffer_units_mask; size_t last = (queue_is_empty(q) ? head : /* Empty */ ((head < tail) ? tail : /* Normal */ q->buffer_units)); /* Wrapped | Full */ @@ -120,7 +120,7 @@ size_t queue_advance_tail(struct queue const *q, size_t count) size_t queue_add_unit(struct queue const *q, const void *src) { - size_t tail = q->state->tail & (q->buffer_units - 1); + size_t tail = q->state->tail & q->buffer_units_mask; if (queue_space(q) == 0) return 0; @@ -146,7 +146,7 @@ size_t queue_add_memcpy(struct queue const *q, size_t n)) { size_t transfer = MIN(count, queue_space(q)); - size_t tail = q->state->tail & (q->buffer_units - 1); + size_t tail = q->state->tail & q->buffer_units_mask; size_t first = MIN(transfer, q->buffer_units - tail); memcpy(q->buffer + tail * q->unit_bytes, @@ -183,7 +183,7 @@ static void queue_read_safe(struct queue const *q, size_t queue_remove_unit(struct queue const *q, void *dest) { - size_t head = q->state->head & (q->buffer_units - 1); + size_t head = q->state->head & q->buffer_units_mask; if (queue_count(q) == 0) return 0; @@ -209,7 +209,7 @@ size_t queue_remove_memcpy(struct queue const *q, size_t n)) { size_t transfer = MIN(count, queue_count(q)); - size_t head = q->state->head & (q->buffer_units - 1); + size_t head = q->state->head & q->buffer_units_mask; queue_read_safe(q, dest, head, transfer, memcpy); @@ -236,7 +236,7 @@ size_t queue_peek_memcpy(struct queue const *q, size_t transfer = MIN(count, available - i); if (i < available) { - size_t head = (q->state->head + i) & (q->buffer_units - 1); + size_t head = (q->state->head + i) & q->buffer_units_mask; queue_read_safe(q, dest, head, transfer, memcpy); } |