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loader/dri3: Clean up dri3_find_back logic

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No need to go through the loop again for allocating a new buffer.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18269>
This commit is contained in:
Michel Dänzer 2021-08-19 16:03:03 +02:00 • committed by Marge Bot
parent a093a44d45
commit d588145161
1 changed files with 14 additions and 5 deletions
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19
src/loader/loader_dri3_helper.c
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@ -716,6 +716,7 @@ dri3_find_back(struct loader_dri3_drawable *draw, bool prefer_a_different)
*/
int current_back_id = draw->cur_back;
for (;;) {
/* Find idle buffer or unallocated slot */
for (b = 0; b < num_to_consider; b++) {
int id = LOADER_DRI3_BACK_ID((b + draw->cur_back) % draw->cur_num_back);
struct loader_dri3_buffer *buffer = draw->buffers[id];
@ -728,15 +729,23 @@ dri3_find_back(struct loader_dri3_drawable *draw, bool prefer_a_different)
}
}
/* No idle buffer, allocate another one if possible */
if (num_to_consider < max_num) {
num_to_consider = ++draw->cur_num_back;
} else if (prefer_a_different) {
prefer_a_different = false;
} else if (!dri3_wait_for_event_locked(draw, NULL)) {
b = LOADER_DRI3_BACK_ID(draw->cur_num_back++);
draw->cur_back = b;
mtx_unlock(&draw->mtx);
return -1;
return b;
}
/* Prefer re-using the same buffer over blocking */
if (prefer_a_different)
prefer_a_different = false;
else if (!dri3_wait_for_event_locked(draw, NULL))
break;
}
mtx_unlock(&draw->mtx);
return -1;
}
static xcb_gcontext_t