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Added the event filter to the poll_descriptor functions.

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This commit is contained in:
Jaroslav Kysela 2001-02-21 16:29:40 +00:00
parent d1297b3be9
commit 1dfd70d11e
2 changed files with 28 additions and 14 deletions
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4
include/seq.h
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@ -324,8 +324,8 @@ extern "C" {
int snd_seq_open(snd_seq_t **handle, const char *name, int streams, int mode); int snd_seq_open(snd_seq_t **handle, const char *name, int streams, int mode);
int snd_seq_close(snd_seq_t *handle); int snd_seq_close(snd_seq_t *handle);
int snd_seq_poll_descriptors_count(snd_seq_t *handle); int snd_seq_poll_descriptors_count(snd_seq_t *handle, short events);
int snd_seq_poll_descriptors(snd_seq_t *handle, struct pollfd *pfds, unsigned int space); int snd_seq_poll_descriptors(snd_seq_t *handle, struct pollfd *pfds, unsigned int space, short events);
int snd_seq_nonblock(snd_seq_t *handle, int nonblock); int snd_seq_nonblock(snd_seq_t *handle, int nonblock);
int snd_seq_client_id(snd_seq_t *handle); int snd_seq_client_id(snd_seq_t *handle);
int snd_seq_output_buffer_size(snd_seq_t *handle); int snd_seq_output_buffer_size(snd_seq_t *handle);

38
src/seq/seq.c
View file

@ -152,25 +152,39 @@ int _snd_seq_poll_descriptor(snd_seq_t *seq)
return seq->poll_fd; return seq->poll_fd;
} }
int snd_seq_poll_descriptors_count(snd_seq_t *seq) int snd_seq_poll_descriptors_count(snd_seq_t *seq, short events)
{ {
int result = 0;
assert(seq); assert(seq);
return 1; if (events & POLLIN) {
assert(seq->streams & SND_SEQ_OPEN_INPUT);
result++;
}
if (events & POLLOUT) {
assert(seq->streams & SND_SEQ_OPEN_OUTPUT);
result++;
}
return result ? 1 : 0;
} }
int snd_seq_poll_descriptors(snd_seq_t *seq, struct pollfd *pfds, unsigned int space) int snd_seq_poll_descriptors(snd_seq_t *seq, struct pollfd *pfds, unsigned int space, short events)
{ {
short revents = 0;
assert(seq); assert(seq);
if (space >= 1) { if ((events & POLLIN) && space >= 1) {
pfds->fd = seq->poll_fd; assert(seq->streams & SND_SEQ_OPEN_INPUT);
pfds->events = 0; revents |= POLLIN;
if (seq->streams & SND_SEQ_OPEN_INPUT)
pfds->events |= POLLIN;
if (seq->streams & SND_SEQ_OPEN_OUTPUT)
pfds->events |= POLLOUT;
return 1;
} }
return 0; if ((events & POLLOUT) && space >= 1) {
assert(seq->streams & SND_SEQ_OPEN_INPUT);
revents |= POLLOUT;
}
if (!revents)
return 0;
pfds->fd = seq->poll_fd;
pfds->events = revents;
return 1;
} }
/* /*