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fix file descriptor handling for poll() without epoll()

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This problem could cause busy-waiting after a network connection
on Android, for example.
This commit is contained in:
Matthew Flatt 2015-09-19 08:16:30 -06:00
parent fccd86d67d
commit ee9d797906
1 changed files with 2 additions and 2 deletions
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4
racket/src/racket/src/thread.c
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@ -4079,7 +4079,7 @@ static int check_fd_semaphores()
hit = 1; hit = 1;
SCHEME_VEC_ELS(v)[0] = scheme_false; SCHEME_VEC_ELS(v)[0] = scheme_false;
} }
pfd[i].revents -= (pfd[i].revents & POLLIN); pfd[i].events -= (pfd[i].events & POLLIN);
} }
if (pfd[i].revents & (POLLOUT | POLLHUP | POLLERR)) { if (pfd[i].revents & (POLLOUT | POLLHUP | POLLERR)) {
s = SCHEME_VEC_ELS(v)[1]; s = SCHEME_VEC_ELS(v)[1];
@ -4088,7 +4088,7 @@ static int check_fd_semaphores()
hit = 1; hit = 1;
SCHEME_VEC_ELS(v)[1] = scheme_false; SCHEME_VEC_ELS(v)[1] = scheme_false;
} }
pfd[i].revents -= (pfd[i].revents & POLLOUT); pfd[i].events -= (pfd[i].events & POLLOUT);
} }
if (SCHEME_FALSEP(SCHEME_VEC_ELS(v)[0]) if (SCHEME_FALSEP(SCHEME_VEC_ELS(v)[0])
&& SCHEME_FALSEP(SCHEME_VEC_ELS(v)[1])) && SCHEME_FALSEP(SCHEME_VEC_ELS(v)[1]))