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[input] signal when making space in output buffer

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nick black 2021-09-16 04:12:46 -04:00
parent 24c194df1b
commit 0686a1c390
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GPG Key ID: 5F43400C21CBFACC
1 changed files with 14 additions and 8 deletions
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22
src/lib/in.c
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@ -21,14 +21,15 @@
// FIXME still need to: // FIXME still need to:
// integrate main specials trie with automaton, enable input_errors // integrate main specials trie with automaton, enable input_errors
// wake up input thread when space becomes available // probably want pipes/eventfds rather than SIGCONT
// (needs pipes/eventfds)
static sig_atomic_t resize_seen; static sig_atomic_t resize_seen;
// called for SIGWINCH and SIGCONT, and causes block_on_input to return // called for SIGWINCH and SIGCONT, and causes block_on_input to return
void sigwinch_handler(int signo){ void sigwinch_handler(int signo){
resize_seen = signo; if(signo == SIGWINCH){
resize_seen = signo;
}
} }
// data collected from responses to our terminal queries. // data collected from responses to our terminal queries.
@ -1740,11 +1741,10 @@ block_on_input(inputctx* ictx){
sigdelset(&smask, SIGWINCH); sigdelset(&smask, SIGWINCH);
while((events = ppoll(pfds, pfdcount, ts, &smask)) < 0){ while((events = ppoll(pfds, pfdcount, ts, &smask)) < 0){
#endif #endif
if(errno != EINTR && errno != EAGAIN && errno != EBUSY && errno != EWOULDBLOCK){ if(errno != EAGAIN && errno != EBUSY && errno != EWOULDBLOCK){
return -1; return -1;
} }else if(errno == EINTR){
if(resize_seen){ return resize_seen;
return 1;
} }
} }
return events; return events;
@ -1836,9 +1836,15 @@ internal_get(inputctx* ictx, const struct timespec* ts, ncinput* ni){
if(++ictx->iread == ictx->isize){ if(++ictx->iread == ictx->isize){
ictx->iread = 0; ictx->iread = 0;
} }
--ictx->ivalid; bool sendsignal = false;
if(ictx->ivalid-- == ictx->isize){
sendsignal = true;
}
ni->seqnum = ++ictx->seqnum; ni->seqnum = ++ictx->seqnum;
pthread_mutex_unlock(&ictx->ilock); pthread_mutex_unlock(&ictx->ilock);
if(sendsignal){
pthread_kill(ictx->tid, SIGCONT);
}
return ni->id; return ni->id;
} }