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smp: take pt lock in poll foreign thread detection

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This commit is contained in:
Andy Green 2019-02-23 15:24:57 +08:00
parent e7df97c309
commit 562dcbaf9f
1 changed files with 5 additions and 0 deletions
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5
lib/core-net/pollfd.c
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@ -114,6 +114,8 @@ _lws_change_pollfd(struct lws *wsi, int _and, int _or, struct lws_pollargs *pa)
ftp->fd_index = wsi->position_in_fds_table;
ftp->next = NULL;
lws_pt_lock(pt, __func__);
/* place at END of list to maintain order */
ftp1 = (struct lws_foreign_thread_pollfd **)
&vpt->foreign_pfd_list;
@ -123,6 +125,9 @@ _lws_change_pollfd(struct lws *wsi, int _and, int _or, struct lws_pollargs *pa)
*ftp1 = ftp;
vpt->foreign_spinlock = 0;
lws_memory_barrier();
lws_pt_unlock(pt);
lws_cancel_service_pt(wsi);
return 0;