dns-oarc/ck
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Merging upstream version 0.7.1 (Closes: #991419).

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Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-02-09 07:39:31 +01:00
parent 05c588e9d7
commit 9e09e0ef69
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
99 changed files with 6727 additions and 943 deletions
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12
include/spinlock/hclh.h
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@ -81,6 +81,8 @@ ck_spinlock_hclh_lock(struct ck_spinlock_hclh **glob_queue,
thread->wait = true;
thread->splice = false;
thread->cluster_id = (*local_queue)->cluster_id;
/* Make sure previous->previous doesn't appear to be NULL */
thread->previous = *local_queue;
/* Serialize with respect to update of local queue. */
ck_pr_fence_store_atomic();
@ -91,13 +93,15 @@ ck_spinlock_hclh_lock(struct ck_spinlock_hclh **glob_queue,
/* Wait until previous thread from the local queue is done with lock. */
ck_pr_fence_load();
if (previous->previous != NULL &&
previous->cluster_id == thread->cluster_id) {
while (ck_pr_load_uint(&previous->wait) == true)
if (previous->previous != NULL) {
while (ck_pr_load_uint(&previous->wait) == true &&
ck_pr_load_int(&previous->cluster_id) == thread->cluster_id &&
ck_pr_load_uint(&previous->splice) == false)
ck_pr_stall();
/* We're head of the global queue, we're done */
if (ck_pr_load_uint(&previous->splice) == false)
if (ck_pr_load_int(&previous->cluster_id) == thread->cluster_id &&
ck_pr_load_uint(&previous->splice) == false)
return;
}