/***
This file is part of PulseAudio.
+ Copyright 2004-2006 Lennart Poettering
+
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
#include <stdlib.h>
#include <sys/stat.h>
#include <stdio.h>
-#include <assert.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <limits.h>
+#include <sys/poll.h>
#include <pulse/xmalloc.h>
#include <pulsecore/core-error.h>
-#include <pulsecore/iochannel.h>
#include <pulsecore/source.h>
#include <pulsecore/module.h>
#include <pulsecore/core-util.h>
#include <pulsecore/modargs.h>
#include <pulsecore/log.h>
+#include <pulsecore/thread.h>
+#include <pulsecore/thread-mq.h>
+#include <pulsecore/rtpoll.h>
#include "module-pipe-source-symdef.h"
"rate=<sample rate> "
"channel_map=<channel map>")
-#define DEFAULT_FIFO_NAME "/tmp/music.input"
+#define DEFAULT_FILE_NAME "/tmp/music.input"
#define DEFAULT_SOURCE_NAME "fifo_input"
struct userdata {
pa_core *core;
+ pa_module *module;
+ pa_source *source;
+
+ pa_thread *thread;
+ pa_thread_mq thread_mq;
+ pa_rtpoll *rtpoll;
char *filename;
+ int fd;
- pa_source *source;
- pa_iochannel *io;
- pa_module *module;
- pa_memchunk chunk;
+ pa_memchunk memchunk;
+
+ pa_rtpoll_item *rtpoll_item;
};
static const char* const valid_modargs[] = {
NULL
};
-static void do_read(struct userdata *u) {
- ssize_t r;
- pa_memchunk chunk;
- assert(u);
+static void thread_func(void *userdata) {
+ struct userdata *u = userdata;
+ int read_type = 0;
- if (!pa_iochannel_is_readable(u->io))
- return;
+ pa_assert(u);
- pa_module_set_used(u->module, pa_idxset_size(u->source->outputs));
+ pa_log_debug("Thread starting up");
- if (!u->chunk.memblock) {
- u->chunk.memblock = pa_memblock_new(u->core->mempool, PIPE_BUF);
- u->chunk.index = chunk.length = 0;
- }
+ pa_thread_mq_install(&u->thread_mq);
+ pa_rtpoll_install(u->rtpoll);
- assert(u->chunk.memblock && u->chunk.memblock->length > u->chunk.index);
- if ((r = pa_iochannel_read(u->io, (uint8_t*) u->chunk.memblock->data + u->chunk.index, u->chunk.memblock->length - u->chunk.index)) <= 0) {
- pa_log("read(): %s", pa_cstrerror(errno));
- return;
- }
+ for (;;) {
+ int ret;
+ struct pollfd *pollfd;
+
+ pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
+
+ /* Try to read some data and pass it on to the source driver */
+ if (u->source->thread_info.state == PA_SOURCE_RUNNING && pollfd->revents) {
+ ssize_t l;
+ void *p;
+
+ if (!u->memchunk.memblock) {
+ u->memchunk.memblock = pa_memblock_new(u->core->mempool, PIPE_BUF);
+ u->memchunk.index = u->memchunk.length = 0;
+ }
+
+ pa_assert(pa_memblock_get_length(u->memchunk.memblock) > u->memchunk.index);
+
+ p = pa_memblock_acquire(u->memchunk.memblock);
+ l = pa_read(u->fd, (uint8_t*) p + u->memchunk.index, pa_memblock_get_length(u->memchunk.memblock) - u->memchunk.index, &read_type);
+ pa_memblock_release(u->memchunk.memblock);
+
+ pa_assert(l != 0); /* EOF cannot happen, since we opened the fifo for both reading and writing */
+
+ if (l < 0) {
+
+ if (errno == EINTR)
+ continue;
+ else if (errno != EAGAIN) {
+ pa_log("Faile to read data from FIFO: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+ } else {
+
+ u->memchunk.length = l;
+ pa_source_post(u->source, &u->memchunk);
+ u->memchunk.index += l;
+
+ if (u->memchunk.index >= pa_memblock_get_length(u->memchunk.memblock)) {
+ pa_memblock_unref(u->memchunk.memblock);
+ pa_memchunk_reset(&u->memchunk);
+ }
+
+ pollfd->revents = 0;
+ }
+ }
+
+ /* Hmm, nothing to do. Let's sleep */
+ pollfd->events = u->source->thread_info.state == PA_SOURCE_RUNNING ? POLLIN : 0;
+
+ if ((ret = pa_rtpoll_run(u->rtpoll, 1)) < 0)
+ goto fail;
- u->chunk.length = r;
- pa_source_post(u->source, &u->chunk);
- u->chunk.index += r;
+ if (ret == 0)
+ goto finish;
- if (u->chunk.index >= u->chunk.memblock->length) {
- u->chunk.index = u->chunk.length = 0;
- pa_memblock_unref(u->chunk.memblock);
- u->chunk.memblock = NULL;
+ pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
+ if (pollfd->revents & ~POLLIN) {
+ pa_log("FIFO shutdown.");
+ goto fail;
+ }
}
-}
-static void io_callback(PA_GCC_UNUSED pa_iochannel *io, void*userdata) {
- struct userdata *u = userdata;
- assert(u);
- do_read(u);
+fail:
+ /* If this was no regular exit from the loop we have to continue
+ * processing messages until we received PA_MESSAGE_SHUTDOWN */
+ pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
+ pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
+
+finish:
+ pa_log_debug("Thread shutting down");
}
-int pa__init(pa_core *c, pa_module*m) {
- struct userdata *u = NULL;
+int pa__init(pa_module*m) {
+ struct userdata *u;
struct stat st;
- const char *p;
- int fd = -1;
pa_sample_spec ss;
pa_channel_map map;
- pa_modargs *ma = NULL;
+ pa_modargs *ma;
char *t;
+ struct pollfd *pollfd;
- assert(c && m);
+ pa_assert(m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
- pa_log("failed to parse module arguments");
+ pa_log("failed to parse module arguments.");
goto fail;
}
- ss = c->default_sample_spec;
+ ss = m->core->default_sample_spec;
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;
}
- mkfifo(p = pa_modargs_get_value(ma, "file", DEFAULT_FIFO_NAME), 0777);
+ u = pa_xnew0(struct userdata, 1);
+ u->core = m->core;
+ u->module = m;
+ m->userdata = u;
+ pa_memchunk_reset(&u->memchunk);
+ pa_thread_mq_init(&u->thread_mq, m->core->mainloop);
+ u->rtpoll = pa_rtpoll_new();
+ pa_rtpoll_item_new_asyncmsgq(u->rtpoll, PA_RTPOLL_EARLY, u->thread_mq.inq);
- if ((fd = open(p, O_RDWR)) < 0) {
- pa_log("open('%s'): %s", p, pa_cstrerror(errno));
+ u->filename = pa_xstrdup(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_fd_set_cloexec(fd, 1);
+ pa_make_fd_cloexec(u->fd);
+ pa_make_fd_nonblock(u->fd);
- if (fstat(fd, &st) < 0) {
- pa_log("fstat('%s'): %s", p, pa_cstrerror(errno));
+ 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.", p);
+ pa_log("'%s' is not a FIFO.", u->filename);
goto fail;
}
- u = pa_xmalloc0(sizeof(struct userdata));
-
- u->filename = pa_xstrdup(p);
- u->core = c;
-
- if (!(u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, &map))) {
- pa_log("failed to create source.");
+ if (!(u->source = pa_source_new(m->core, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, &map))) {
+ pa_log("Failed to create source.");
goto fail;
}
+
u->source->userdata = u;
- pa_source_set_owner(u->source, m);
- pa_source_set_description(u->source, t = pa_sprintf_malloc("Unix FIFO source '%s'", p));
+ u->source->flags = 0;
+
+ pa_source_set_module(u->source, m);
+ pa_source_set_asyncmsgq(u->source, u->thread_mq.inq);
+ pa_source_set_rtpoll(u->source, u->rtpoll);
+ pa_source_set_description(u->source, t = pa_sprintf_malloc("Unix FIFO source '%s'", u->filename));
pa_xfree(t);
- u->io = pa_iochannel_new(c->mainloop, fd, -1);
- assert(u->io);
- pa_iochannel_set_callback(u->io, io_callback, u);
+ 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;
- u->chunk.memblock = NULL;
- u->chunk.index = u->chunk.length = 0;
+ if (!(u->thread = pa_thread_new(thread_func, u))) {
+ pa_log("Failed to create thread.");
+ goto fail;
+ }
- u->module = m;
- m->userdata = u;
+ pa_source_put(u->source);
pa_modargs_free(ma);
if (ma)
pa_modargs_free(ma);
- if (fd >= 0)
- close(fd);
-
- pa__done(c, m);
+ pa__done(m);
return -1;
}
-void pa__done(pa_core *c, pa_module*m) {
+void pa__done(pa_module*m) {
struct userdata *u;
- assert(c && m);
+
+ pa_assert(m);
if (!(u = m->userdata))
return;
- if (u->chunk.memblock)
- pa_memblock_unref(u->chunk.memblock);
+ if (u->source)
+ pa_source_unlink(u->source);
+
+ if (u->thread) {
+ pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
+ pa_thread_free(u->thread);
+ }
- pa_source_disconnect(u->source);
- pa_source_unref(u->source);
- pa_iochannel_free(u->io);
+ pa_thread_mq_done(&u->thread_mq);
+
+ if (u->source)
+ pa_source_unref(u->source);
+
+ if (u->memchunk.memblock)
+ pa_memblock_unref(u->memchunk.memblock);
+
+ if (u->rtpoll_item)
+ pa_rtpoll_item_free(u->rtpoll_item);
+
+ if (u->rtpoll)
+ pa_rtpoll_free(u->rtpoll);
+
+ if (u->filename) {
+ unlink(u->filename);
+ pa_xfree(u->filename);
+ }
- assert(u->filename);
- unlink(u->filename);
- pa_xfree(u->filename);
+ if (u->fd >= 0)
+ pa_assert_se(pa_close(u->fd) == 0);
pa_xfree(u);
}