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netconn: switch gethostbyname to use tcpip_send_msg_wait_sem (task #14523)

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This switches netconn_gethostbyname to use tcpip_send_msg_wait_sem to
take advantage of core locking support when enabled.

tcpip_send_msg_wait_sem handles blocking for the non-core locking case,
so we can remove the manual blocking in netconn_gethostbyname. For the
core locking case, we need to block if waiting on DNS callback. To
achieve this, we unlock the core and wait in lwip_netconn_do_gethostbyname.
This is the similar approach that netconn_write takes when it needs to
block to continue the write (see lwip_netconn_do_write)

This improves performance in the core locking case and is no change
for the non-core locking case
This commit is contained in:
Joel Cunningham
2017-05-31 19:36:39 -05:00
parent f13b1340f2
commit d4c8a1ac78
3 changed files with 18 additions and 9 deletions
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@@ -6,6 +6,9 @@ HISTORY
++ New features:
2017-06-20: Joel Cunningham
* netconn/netdb: added core locking support to netconn_gethostbyname (task #14523)
2017-04-25: Simon Goldschmidt
* dhcp: added two hooks for adding and parsing user defined DHCP options