static int ref(void) {
if (n_ref > 0) {
pa_assert(pipe_fd[0] >= 0);
pa_assert(pipe_fd[1] >= 0);
pa_assert(lock_fd_mutex);
n_ref++;
return 0;
}
pa_assert(!lock_fd_mutex);
pa_assert(state == STATE_IDLE);
pa_assert(lock_fd < 0);
pa_assert(!thread);
pa_assert(pipe_fd[0] < 0);
pa_assert(pipe_fd[1] < 0);
if (pipe(pipe_fd) < 0)
return -1;
pa_make_fd_cloexec(pipe_fd[0]);
pa_make_fd_cloexec(pipe_fd[1]);
pa_make_fd_nonblock(pipe_fd[1]);
pa_make_fd_nonblock(pipe_fd[0]);
lock_fd_mutex = pa_mutex_new(FALSE, FALSE);
n_ref = 1;
return 0;
}
static struct tdb_context *tdb_open_cloexec(
const char *name,
int hash_size,
int tdb_flags,
int open_flags,
mode_t mode) {
/* Mimics pa_open_cloexec() */
struct tdb_context *c;
#ifdef O_NOCTTY
open_flags |= O_NOCTTY;
#endif
#ifdef O_CLOEXEC
errno = 0;
if ((c = tdb_open(name, hash_size, tdb_flags, open_flags | O_CLOEXEC, mode)))
goto finish;
if (errno != EINVAL)
return NULL;
#endif
errno = 0;
if (!(c = tdb_open(name, hash_size, tdb_flags, open_flags, mode)))
return NULL;
finish:
pa_make_fd_cloexec(tdb_fd(c));
return c;
}
/* Initializes CPU load limiter */
int pa_cpu_limit_init(pa_mainloop_api *m) {
struct sigaction sa;
pa_assert(m);
pa_assert(!api);
pa_assert(!io_event);
pa_assert(the_pipe[0] == -1);
pa_assert(the_pipe[1] == -1);
pa_assert(!installed);
time(&last_time);
/* Prepare the main loop pipe */
if (pipe(the_pipe) < 0) {
pa_log("pipe() failed: %s", pa_cstrerror(errno));
return -1;
}
pa_make_fd_nonblock(the_pipe[0]);
pa_make_fd_nonblock(the_pipe[1]);
pa_make_fd_cloexec(the_pipe[0]);
pa_make_fd_cloexec(the_pipe[1]);
api = m;
io_event = api->io_new(m, the_pipe[0], PA_IO_EVENT_INPUT, callback, NULL);
phase = PHASE_IDLE;
/* Install signal handler for SIGXCPU */
memset(&sa, 0, sizeof(sa));
sa.sa_handler = signal_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
if (sigaction(SIGXCPU, &sa, &sigaction_prev) < 0) {
pa_cpu_limit_done();
return -1;
}
installed = 1;
reset_cpu_time(CPUTIME_INTERVAL_SOFT);
return 0;
}
pa_fdsem *pa_fdsem_open_shm(pa_fdsem_data *data, int event_fd) {
pa_fdsem *f = NULL;
pa_assert(data);
pa_assert(event_fd >= 0);
#ifdef HAVE_SYS_EVENTFD_H
f = pa_xnew(pa_fdsem, 1);
f->efd = event_fd;
pa_make_fd_cloexec(f->efd);
f->fds[0] = f->fds[1] = -1;
f->data = data;
#endif
return f;
}
int pa__init(pa_module*m) {
struct userdata *u;
struct stat st;
pa_sample_spec ss;
pa_channel_map map;
pa_modargs *ma;
struct pollfd *pollfd;
pa_source_new_data data;
pa_assert(m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("failed to parse module arguments.");
goto fail;
}
ss = m->core->default_sample_spec;
map = m->core->default_channel_map;
if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) {
pa_log("invalid sample format specification or channel map");
goto fail;
}
m->userdata = u = pa_xnew0(struct userdata, 1);
u->core = m->core;
u->module = m;
pa_memchunk_reset(&u->memchunk);
u->rtpoll = pa_rtpoll_new();
pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
u->filename = pa_runtime_path(pa_modargs_get_value(ma, "file", DEFAULT_FILE_NAME));
mkfifo(u->filename, 0666);
if ((u->fd = open(u->filename, O_RDWR|O_NOCTTY)) < 0) {
pa_log("open('%s'): %s", u->filename, pa_cstrerror(errno));
goto fail;
}
pa_make_fd_cloexec(u->fd);
pa_make_fd_nonblock(u->fd);
if (fstat(u->fd, &st) < 0) {
pa_log("fstat('%s'): %s",u->filename, pa_cstrerror(errno));
goto fail;
}
if (!S_ISFIFO(st.st_mode)) {
pa_log("'%s' is not a FIFO.", u->filename);
goto fail;
}
pa_source_new_data_init(&data);
data.driver = __FILE__;
data.module = m;
pa_source_new_data_set_name(&data, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME));
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->filename);
pa_proplist_setf(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Unix FIFO source %s", u->filename);
pa_source_new_data_set_sample_spec(&data, &ss);
pa_source_new_data_set_channel_map(&data, &map);
if (pa_modargs_get_proplist(ma, "source_properties", data.proplist, PA_UPDATE_REPLACE) < 0) {
pa_log("Invalid properties");
pa_source_new_data_done(&data);
goto fail;
}
u->source = pa_source_new(m->core, &data, PA_SOURCE_LATENCY);
pa_source_new_data_done(&data);
if (!u->source) {
pa_log("Failed to create source.");
goto fail;
}
u->source->parent.process_msg = source_process_msg;
u->source->userdata = u;
pa_source_set_asyncmsgq(u->source, u->thread_mq.inq);
pa_source_set_rtpoll(u->source, u->rtpoll);
pa_source_set_fixed_latency(u->source, pa_bytes_to_usec(PIPE_BUF, &u->source->sample_spec));
u->rtpoll_item = pa_rtpoll_item_new(u->rtpoll, PA_RTPOLL_NEVER, 1);
pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
pollfd->fd = u->fd;
pollfd->events = pollfd->revents = 0;
if (!(u->thread = pa_thread_new(thread_func, u))) {
pa_log("Failed to create thread.");
goto fail;
}
pa_source_put(u->source);
pa_modargs_free(ma);
return 0;
fail:
if (ma)
pa_modargs_free(ma);
pa__done(m);
return -1;
}
