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Handle errno better when polling for events

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This commit is contained in:
Kovid Goyal
2018-07-13 10:33:18 +05:30
parent 037bfeff82
commit 31853ee20c
1 changed files with 6 additions and 2 deletions
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8
glfw/backend_utils.c vendored
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@@ -222,7 +222,9 @@ pollForEvents(EventLoopData *eld, double timeout) {
while(1) { while(1) {
if (timeout >= 0) { if (timeout >= 0) {
errno = 0;
result = pollWithTimeout(eld->fds, eld->watches_count, timeout); result = pollWithTimeout(eld->fds, eld->watches_count, timeout);
int saved_errno = errno;
dispatchTimers(eld); dispatchTimers(eld);
if (result > 0) { if (result > 0) {
dispatchEvents(eld); dispatchEvents(eld);
@@ -231,16 +233,18 @@ pollForEvents(EventLoopData *eld, double timeout) {
} }
timeout = end_time - monotonic(); timeout = end_time - monotonic();
if (timeout <= 0) break; if (timeout <= 0) break;
if (result < 0 && (errno == EINTR || errno == EAGAIN)) continue; if (result < 0 && (saved_errno == EINTR || saved_errno == EAGAIN)) continue;
break; break;
} else { } else {
errno = 0;
result = poll(eld->fds, eld->watches_count, -1); result = poll(eld->fds, eld->watches_count, -1);
int saved_errno = errno;
dispatchTimers(eld); dispatchTimers(eld);
if (result > 0) { if (result > 0) {
dispatchEvents(eld); dispatchEvents(eld);
read_ok = eld->watches[0].ready; read_ok = eld->watches[0].ready;
} }
if (result < 0 && (errno == EINTR || errno == EAGAIN)) continue; if (result < 0 && (saved_errno == EINTR || saved_errno == EAGAIN)) continue;
break; break;
} }
} }