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Change the isc_async API to use cds_wfcqueue internally

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The isc_async API was using lock-free stack (where enqueue operation was
not wait-free).  Change the isc_async to use cds_wfcqueue internally -
enqueue and splice (move the queue members from one list to another) is
nonblocking and wait-free.
This commit is contained in:
Ondřej Surý
2023-05-08 23:31:54 +02:00
parent c90a9d6a09
commit 7b1d985de2
9 changed files with 100 additions and 91 deletions
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6
lib/isc/netmgr/netmgr.c
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@@ -692,8 +692,6 @@ isc___nmsocket_init(isc_nmsocket_t *sock, isc__networker_t *worker,
.active_handles = ISC_LIST_INITIALIZER,
.active_link = ISC_LINK_INITIALIZER,
.active = true,
.job = ISC_JOB_INITIALIZER,
.quotacb = ISC_JOB_INITIALIZER,
};
if (iface != NULL) {
@@ -716,8 +714,6 @@ isc___nmsocket_init(isc_nmsocket_t *sock, isc__networker_t *worker,
isc__networker_attach(worker, &sock->worker);
sock->uv_handle.handle.data = sock;
ISC_LINK_INIT(&sock->quotacb, link);
switch (type) {
case isc_nm_udpsocket:
case isc_nm_udplistener:
@@ -805,7 +801,6 @@ alloc_handle(isc_nmsocket_t *sock) {
.magic = NMHANDLE_MAGIC,
.active_link = ISC_LINK_INITIALIZER,
.inactive_link = ISC_LINK_INITIALIZER,
.job = ISC_JOB_INITIALIZER,
};
isc_refcount_init(&handle->references, 1);
@@ -1522,7 +1517,6 @@ isc___nm_uvreq_get(isc_nmsocket_t *sock FLARG) {
.connect_tries = 3,
.link = ISC_LINK_INITIALIZER,
.active_link = ISC_LINK_INITIALIZER,
.job = ISC_JOB_INITIALIZER,
.magic = UVREQ_MAGIC,
};
uv_handle_set_data(&req->uv_req.handle, req);