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Fix the data race when read-writing sock->active by using cmpxchg

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This commit is contained in:
Ondřej Surý
2020-10-22 10:07:56 +02:00
committed by Evan Hunt
parent 5ef71c420f
commit 8797e5efd5
6 changed files with 49 additions and 28 deletions
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14
lib/isc/netmgr/netmgr-int.h
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@@ -660,6 +660,18 @@ isc__nmsocket_active(isc_nmsocket_t *sock);
* or, for child sockets, 'sock->parent->active'.
*/
bool
isc__nmsocket_deactivate(isc_nmsocket_t *sock);
/*%<
* @brief Deactivate active socket
*
* Atomically deactive the socket by setting @p sock->active or, for child
* sockets, @p sock->parent->active to @c false
*
* @param[in] sock - valid nmsocket
* @return @c false if the socket was already inactive, @c true otherwise
*/
void
isc__nmsocket_clearcb(isc_nmsocket_t *sock);
/*%<
@@ -718,7 +730,7 @@ isc__nm_tcp_close(isc_nmsocket_t *sock);
/*%<
* Close a TCP socket.
*/
isc_result_t
void
isc__nm_tcp_pauseread(isc_nmsocket_t *sock);
/*%<
* Pause reading on this socket, while still remembering the callback.