-/* $Id$ */
-
/***
This file is part of PulseAudio.
#include <config.h>
#endif
-#include <sys/utsname.h>
#include <sys/types.h>
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
+#ifdef HAVE_POLL_H
+#include <poll.h>
+#else
+#include <pulsecore/poll.h>
+#endif
+
#include <pulse/xmalloc.h>
+#include <pulse/timeval.h>
#include <pulsecore/core-error.h>
-#include <pulsecore/rtclock.h>
+#include <pulsecore/core-rtclock.h>
#include <pulsecore/macro.h>
#include <pulsecore/llist.h>
-#include <pulsecore/rtsig.h>
#include <pulsecore/flist.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/winsock.h>
+#include <pulsecore/ratelimit.h>
#include "rtpoll.h"
-struct pa_rtpoll {
+/* #define DEBUG_TIMING */
+struct pa_rtpoll {
struct pollfd *pollfd, *pollfd2;
unsigned n_pollfd_alloc, n_pollfd_used;
- pa_usec_t interval;
+ struct timeval next_elapse;
+ pa_bool_t timer_enabled:1;
- int scan_for_dead;
- int running, installed, rebuild_needed;
+ pa_bool_t scan_for_dead:1;
+ pa_bool_t running:1;
+ pa_bool_t rebuild_needed:1;
+ pa_bool_t quit:1;
-#ifdef HAVE_PPOLL
- int rtsig;
- sigset_t sigset_unblocked;
- struct timespec interval_timespec;
- timer_t timer;
-#ifdef __linux__
- int dont_use_ppoll;
-#endif
+#ifdef DEBUG_TIMING
+ pa_usec_t timestamp;
+ pa_usec_t slept, awake;
#endif
-
+
PA_LLIST_HEAD(pa_rtpoll_item, items);
};
struct pa_rtpoll_item {
pa_rtpoll *rtpoll;
- int dead;
+ pa_bool_t dead;
+
+ pa_rtpoll_priority_t priority;
struct pollfd *pollfd;
unsigned n_pollfd;
+ int (*work_cb)(pa_rtpoll_item *i);
int (*before_cb)(pa_rtpoll_item *i);
void (*after_cb)(pa_rtpoll_item *i);
void *userdata;
-
+
PA_LLIST_FIELDS(pa_rtpoll_item);
};
PA_STATIC_FLIST_DECLARE(items, 0, pa_xfree);
-static void signal_handler_noop(int s) { }
-
pa_rtpoll *pa_rtpoll_new(void) {
pa_rtpoll *p;
p = pa_xnew(pa_rtpoll, 1);
-#ifdef HAVE_PPOLL
-
-#ifdef __linux__
- /* ppoll is broken on Linux < 2.6.16 */
-
- p->dont_use_ppoll = 0;
-
- {
- struct utsname u;
- unsigned major, minor, micro;
-
- pa_assert_se(uname(&u) == 0);
-
- if (sscanf(u.release, "%u.%u.%u", &major, &minor, µ) != 3 ||
- (major < 2) ||
- (major == 2 && minor < 6) ||
- (major == 2 && minor == 6 && micro < 16))
-
- p->dont_use_ppoll = 1;
- }
-
-#endif
-
- p->rtsig = -1;
- sigemptyset(&p->sigset_unblocked);
- memset(&p->interval_timespec, 0, sizeof(p->interval_timespec));
- p->timer = (timer_t) -1;
-
-#endif
-
p->n_pollfd_alloc = 32;
p->pollfd = pa_xnew(struct pollfd, p->n_pollfd_alloc);
p->pollfd2 = pa_xnew(struct pollfd, p->n_pollfd_alloc);
p->n_pollfd_used = 0;
- p->interval = 0;
-
- p->running = 0;
- p->installed = 0;
- p->scan_for_dead = 0;
- p->rebuild_needed = 0;
-
- PA_LLIST_HEAD_INIT(pa_rtpoll_item, p->items);
-
- return p;
-}
-
-void pa_rtpoll_install(pa_rtpoll *p) {
- pa_assert(p);
- pa_assert(!p->installed);
-
- p->installed = 1;
+ pa_zero(p->next_elapse);
+ p->timer_enabled = FALSE;
-#ifdef HAVE_PPOLL
- if (p->dont_use_ppoll)
- return;
-
- if ((p->rtsig = pa_rtsig_get_for_thread()) < 0) {
- pa_log_warn("Failed to reserve POSIX realtime signal.");
- return;
- }
+ p->running = FALSE;
+ p->scan_for_dead = FALSE;
+ p->rebuild_needed = FALSE;
+ p->quit = FALSE;
- pa_log_debug("Acquired POSIX realtime signal SIGRTMIN+%i", p->rtsig - SIGRTMIN);
+ PA_LLIST_HEAD_INIT(pa_rtpoll_item, p->items);
- {
- sigset_t ss;
- struct sigaction sa;
-
- pa_assert_se(sigemptyset(&ss) == 0);
- pa_assert_se(sigaddset(&ss, p->rtsig) == 0);
- pa_assert_se(pthread_sigmask(SIG_BLOCK, &ss, &p->sigset_unblocked) == 0);
- pa_assert_se(sigdelset(&p->sigset_unblocked, p->rtsig) == 0);
-
- memset(&sa, 0, sizeof(sa));
- sa.sa_handler = signal_handler_noop;
- pa_assert_se(sigemptyset(&sa.sa_mask) == 0);
-
- pa_assert_se(sigaction(p->rtsig, &sa, NULL) == 0);
-
- /* We never reset the signal handler. Why should we? */
- }
-
+#ifdef DEBUG_TIMING
+ p->timestamp = pa_rtclock_now();
+ p->slept = p->awake = 0;
#endif
+
+ return p;
}
static void rtpoll_rebuild(pa_rtpoll *p) {
struct pollfd *e, *t;
pa_rtpoll_item *i;
int ra = 0;
-
+
pa_assert(p);
- p->rebuild_needed = 0;
+ p->rebuild_needed = FALSE;
if (p->n_pollfd_used > p->n_pollfd_alloc) {
/* Hmm, we have to allocate some more space */
if (i->n_pollfd > 0) {
size_t l = i->n_pollfd * sizeof(struct pollfd);
-
+
if (i->pollfd)
memcpy(e, i->pollfd, l);
else
i->pollfd = e;
} else
i->pollfd = NULL;
-
+
e += i->n_pollfd;
}
t = p->pollfd;
p->pollfd = p->pollfd2;
p->pollfd2 = t;
-
+
if (ra)
p->pollfd2 = pa_xrealloc(p->pollfd2, p->n_pollfd_alloc * sizeof(struct pollfd));
-
}
static void rtpoll_item_destroy(pa_rtpoll_item *i) {
PA_LLIST_REMOVE(pa_rtpoll_item, p->items, i);
p->n_pollfd_used -= i->n_pollfd;
-
+
if (pa_flist_push(PA_STATIC_FLIST_GET(items), i) < 0)
pa_xfree(i);
- p->rebuild_needed = 1;
+ p->rebuild_needed = TRUE;
}
void pa_rtpoll_free(pa_rtpoll *p) {
pa_assert(p);
- pa_assert(!p->items);
+ while (p->items)
+ rtpoll_item_destroy(p->items);
+
pa_xfree(p->pollfd);
pa_xfree(p->pollfd2);
-#ifdef HAVE_PPOLL
- if (p->timer != (timer_t) -1)
- timer_delete(p->timer);
-#endif
-
pa_xfree(p);
}
-int pa_rtpoll_run(pa_rtpoll *p) {
+static void reset_revents(pa_rtpoll_item *i) {
+ struct pollfd *f;
+ unsigned n;
+
+ pa_assert(i);
+
+ if (!(f = pa_rtpoll_item_get_pollfd(i, &n)))
+ return;
+
+ for (; n > 0; n--)
+ f[n-1].revents = 0;
+}
+
+static void reset_all_revents(pa_rtpoll *p) {
+ pa_rtpoll_item *i;
+
+ pa_assert(p);
+
+ for (i = p->items; i; i = i->next) {
+
+ if (i->dead)
+ continue;
+
+ reset_revents(i);
+ }
+}
+
+int pa_rtpoll_run(pa_rtpoll *p, pa_bool_t wait) {
pa_rtpoll_item *i;
int r = 0;
-
+ struct timeval timeout;
+
pa_assert(p);
pa_assert(!p->running);
- pa_assert(p->installed);
-
- p->running = 1;
- for (i = p->items; i; i = i->next) {
+ p->running = TRUE;
+
+ /* First, let's do some work */
+ for (i = p->items; i && i->priority < PA_RTPOLL_NEVER; i = i->next) {
+ int k;
if (i->dead)
continue;
-
+
+ if (!i->work_cb)
+ continue;
+
+ if (p->quit)
+ goto finish;
+
+ if ((k = i->work_cb(i)) != 0) {
+ if (k < 0)
+ r = k;
+
+ goto finish;
+ }
+ }
+
+ /* Now let's prepare for entering the sleep */
+ for (i = p->items; i && i->priority < PA_RTPOLL_NEVER; i = i->next) {
+ int k = 0;
+
+ if (i->dead)
+ continue;
+
if (!i->before_cb)
continue;
- if (i->before_cb(i) < 0) {
+ if (p->quit || (k = i->before_cb(i)) != 0) {
/* Hmm, this one doesn't let us enter the poll, so rewind everything */
if (i->dead)
continue;
-
+
if (!i->after_cb)
continue;
i->after_cb(i);
}
-
+
+ if (k < 0)
+ r = k;
+
goto finish;
}
}
if (p->rebuild_needed)
rtpoll_rebuild(p);
-
- /* OK, now let's sleep */
-#ifdef HAVE_PPOLL
-#ifdef __linux__
- if (!p->dont_use_ppoll)
-#endif
- r = ppoll(p->pollfd, p->n_pollfd_used, p->interval > 0 ? &p->interval_timespec : NULL, p->rtsig < 0 ? NULL : &p->sigset_unblocked);
-#ifdef __linux__
- else
+ memset(&timeout, 0, sizeof(timeout));
+
+ /* Calculate timeout */
+ if (wait && !p->quit && p->timer_enabled) {
+ struct timeval now;
+ pa_rtclock_get(&now);
+
+ if (pa_timeval_cmp(&p->next_elapse, &now) > 0)
+ pa_timeval_add(&timeout, pa_timeval_diff(&p->next_elapse, &now));
+ }
+
+#ifdef DEBUG_TIMING
+ {
+ pa_usec_t now = pa_rtclock_now();
+ p->awake = now - p->timestamp;
+ p->timestamp = now;
+ }
#endif
+ /* OK, now let's sleep */
+#ifdef HAVE_PPOLL
+ {
+ struct timespec ts;
+ ts.tv_sec = timeout.tv_sec;
+ ts.tv_nsec = timeout.tv_usec * 1000;
+ r = ppoll(p->pollfd, p->n_pollfd_used, (!wait || p->quit || p->timer_enabled) ? &ts : NULL, NULL);
+ }
#else
- r = poll(p->pollfd, p->n_pollfd_used, p->interval > 0 ? p->interval / 1000 : -1);
+ r = poll(p->pollfd, p->n_pollfd_used, (!wait || p->quit || p->timer_enabled) ? (int) ((timeout.tv_sec*1000) + (timeout.tv_usec / 1000)) : -1);
#endif
- if (r < 0 && (errno == EAGAIN || errno == EINTR))
- r = 0;
+#ifdef DEBUG_TIMING
+ {
+ pa_usec_t now = pa_rtclock_now();
+ p->slept = now - p->timestamp;
+ p->timestamp = now;
- for (i = p->items; i; i = i->next) {
+ pa_log("Process time %llu ms; sleep time %llu ms",
+ (unsigned long long) (p->awake / PA_USEC_PER_MSEC),
+ (unsigned long long) (p->slept / PA_USEC_PER_MSEC));
+ }
+#endif
+
+ if (r < 0) {
+ if (errno == EAGAIN || errno == EINTR)
+ r = 0;
+ else
+ pa_log_error("poll(): %s", pa_cstrerror(errno));
+
+ reset_all_revents(p);
+ }
+
+ /* Let's tell everyone that we left the sleep */
+ for (i = p->items; i && i->priority < PA_RTPOLL_NEVER; i = i->next) {
if (i->dead)
continue;
finish:
- p->running = 0;
-
+ p->running = FALSE;
+
if (p->scan_for_dead) {
pa_rtpoll_item *n;
- p->scan_for_dead = 0;
-
+ p->scan_for_dead = FALSE;
+
for (i = p->items; i; i = n) {
n = i->next;
}
}
- return r;
+ return r < 0 ? r : !p->quit;
}
-void pa_rtpoll_set_itimer(pa_rtpoll *p, pa_usec_t usec) {
+void pa_rtpoll_set_timer_absolute(pa_rtpoll *p, pa_usec_t usec) {
pa_assert(p);
- p->interval = usec;
-
-#ifdef HAVE_PPOLL
- pa_timespec_store(&p->interval_timespec, usec);
+ pa_timeval_store(&p->next_elapse, usec);
+ p->timer_enabled = TRUE;
+}
-#ifdef __linux__
- if (!p->dont_use_ppoll) {
-#endif
-
- if (p->timer == (timer_t) -1) {
- struct sigevent se;
-
- memset(&se, 0, sizeof(se));
- se.sigev_notify = SIGEV_SIGNAL;
- se.sigev_signo = p->rtsig;
-
- if (timer_create(CLOCK_MONOTONIC, &se, &p->timer) < 0)
- if (timer_create(CLOCK_REALTIME, &se, &p->timer) < 0) {
- pa_log_warn("Failed to allocate POSIX timer: %s", pa_cstrerror(errno));
- p->timer = (timer_t) -1;
- }
- }
+void pa_rtpoll_set_timer_relative(pa_rtpoll *p, pa_usec_t usec) {
+ pa_assert(p);
- if (p->timer != (timer_t) -1) {
- struct itimerspec its;
+ /* Scheduling a timeout for more than an hour is very very suspicious */
+ pa_assert(usec <= PA_USEC_PER_SEC*60ULL*60ULL);
- memset(&its, 0, sizeof(its));
- pa_timespec_store(&its.it_value, usec);
- pa_timespec_store(&its.it_interval, usec);
+ pa_rtclock_get(&p->next_elapse);
+ pa_timeval_add(&p->next_elapse, usec);
+ p->timer_enabled = TRUE;
+}
- assert(timer_settime(p->timer, 0, &its, NULL) == 0);
- }
+void pa_rtpoll_set_timer_disabled(pa_rtpoll *p) {
+ pa_assert(p);
-#ifdef __linux__
- }
-#endif
-
-#endif
+ memset(&p->next_elapse, 0, sizeof(p->next_elapse));
+ p->timer_enabled = FALSE;
}
-pa_rtpoll_item *pa_rtpoll_item_new(pa_rtpoll *p, unsigned n_fds) {
- pa_rtpoll_item *i;
-
+pa_rtpoll_item *pa_rtpoll_item_new(pa_rtpoll *p, pa_rtpoll_priority_t prio, unsigned n_fds) {
+ pa_rtpoll_item *i, *j, *l = NULL;
+
pa_assert(p);
- pa_assert(n_fds > 0);
if (!(i = pa_flist_pop(PA_STATIC_FLIST_GET(items))))
i = pa_xnew(pa_rtpoll_item, 1);
i->rtpoll = p;
- i->dead = 0;
+ i->dead = FALSE;
i->n_pollfd = n_fds;
i->pollfd = NULL;
+ i->priority = prio;
i->userdata = NULL;
i->before_cb = NULL;
i->after_cb = NULL;
-
- PA_LLIST_PREPEND(pa_rtpoll_item, p->items, i);
+ i->work_cb = NULL;
+
+ for (j = p->items; j; j = j->next) {
+ if (prio <= j->priority)
+ break;
+
+ l = j;
+ }
- p->rebuild_needed = 1;
- p->n_pollfd_used += n_fds;
+ PA_LLIST_INSERT_AFTER(pa_rtpoll_item, p->items, j ? j->prev : l, i);
+
+ if (n_fds > 0) {
+ p->rebuild_needed = 1;
+ p->n_pollfd_used += n_fds;
+ }
return i;
}
pa_assert(i);
if (i->rtpoll->running) {
- i->dead = 1;
- i->rtpoll->scan_for_dead = 1;
+ i->dead = TRUE;
+ i->rtpoll->scan_for_dead = TRUE;
return;
}
struct pollfd *pa_rtpoll_item_get_pollfd(pa_rtpoll_item *i, unsigned *n_fds) {
pa_assert(i);
- if (i->rtpoll->rebuild_needed)
- rtpoll_rebuild(i->rtpoll);
-
+ if (i->n_pollfd > 0)
+ if (i->rtpoll->rebuild_needed)
+ rtpoll_rebuild(i->rtpoll);
+
if (n_fds)
*n_fds = i->n_pollfd;
-
+
return i->pollfd;
}
void pa_rtpoll_item_set_before_callback(pa_rtpoll_item *i, int (*before_cb)(pa_rtpoll_item *i)) {
pa_assert(i);
+ pa_assert(i->priority < PA_RTPOLL_NEVER);
i->before_cb = before_cb;
}
void pa_rtpoll_item_set_after_callback(pa_rtpoll_item *i, void (*after_cb)(pa_rtpoll_item *i)) {
pa_assert(i);
+ pa_assert(i->priority < PA_RTPOLL_NEVER);
i->after_cb = after_cb;
}
+void pa_rtpoll_item_set_work_callback(pa_rtpoll_item *i, int (*work_cb)(pa_rtpoll_item *i)) {
+ pa_assert(i);
+ pa_assert(i->priority < PA_RTPOLL_NEVER);
+
+ i->work_cb = work_cb;
+}
+
void pa_rtpoll_item_set_userdata(pa_rtpoll_item *i, void *userdata) {
pa_assert(i);
i->userdata = userdata;
}
+
+void* pa_rtpoll_item_get_userdata(pa_rtpoll_item *i) {
+ pa_assert(i);
+
+ return i->userdata;
+}
+
+static int fdsem_before(pa_rtpoll_item *i) {
+
+ if (pa_fdsem_before_poll(i->userdata) < 0)
+ return 1; /* 1 means immediate restart of the loop */
+
+ return 0;
+}
+
+static void fdsem_after(pa_rtpoll_item *i) {
+ pa_assert(i);
+
+ pa_assert((i->pollfd[0].revents & ~POLLIN) == 0);
+ pa_fdsem_after_poll(i->userdata);
+}
+
+pa_rtpoll_item *pa_rtpoll_item_new_fdsem(pa_rtpoll *p, pa_rtpoll_priority_t prio, pa_fdsem *f) {
+ pa_rtpoll_item *i;
+ struct pollfd *pollfd;
+
+ pa_assert(p);
+ pa_assert(f);
+
+ i = pa_rtpoll_item_new(p, prio, 1);
+
+ pollfd = pa_rtpoll_item_get_pollfd(i, NULL);
+
+ pollfd->fd = pa_fdsem_get(f);
+ pollfd->events = POLLIN;
+
+ i->before_cb = fdsem_before;
+ i->after_cb = fdsem_after;
+ i->userdata = f;
+
+ return i;
+}
+
+static int asyncmsgq_read_before(pa_rtpoll_item *i) {
+ pa_assert(i);
+
+ if (pa_asyncmsgq_read_before_poll(i->userdata) < 0)
+ return 1; /* 1 means immediate restart of the loop */
+
+ return 0;
+}
+
+static void asyncmsgq_read_after(pa_rtpoll_item *i) {
+ pa_assert(i);
+
+ pa_assert((i->pollfd[0].revents & ~POLLIN) == 0);
+ pa_asyncmsgq_read_after_poll(i->userdata);
+}
+
+static int asyncmsgq_read_work(pa_rtpoll_item *i) {
+ pa_msgobject *object;
+ int code;
+ void *data;
+ pa_memchunk chunk;
+ int64_t offset;
+
+ pa_assert(i);
+
+ if (pa_asyncmsgq_get(i->userdata, &object, &code, &data, &offset, &chunk, 0) == 0) {
+ int ret;
+
+ if (!object && code == PA_MESSAGE_SHUTDOWN) {
+ pa_asyncmsgq_done(i->userdata, 0);
+ pa_rtpoll_quit(i->rtpoll);
+ return 1;
+ }
+
+ ret = pa_asyncmsgq_dispatch(object, code, data, offset, &chunk);
+ pa_asyncmsgq_done(i->userdata, ret);
+ return 1;
+ }
+
+ return 0;
+}
+
+pa_rtpoll_item *pa_rtpoll_item_new_asyncmsgq_read(pa_rtpoll *p, pa_rtpoll_priority_t prio, pa_asyncmsgq *q) {
+ pa_rtpoll_item *i;
+ struct pollfd *pollfd;
+
+ pa_assert(p);
+ pa_assert(q);
+
+ i = pa_rtpoll_item_new(p, prio, 1);
+
+ pollfd = pa_rtpoll_item_get_pollfd(i, NULL);
+ pollfd->fd = pa_asyncmsgq_read_fd(q);
+ pollfd->events = POLLIN;
+
+ i->before_cb = asyncmsgq_read_before;
+ i->after_cb = asyncmsgq_read_after;
+ i->work_cb = asyncmsgq_read_work;
+ i->userdata = q;
+
+ return i;
+}
+
+static int asyncmsgq_write_before(pa_rtpoll_item *i) {
+ pa_assert(i);
+
+ pa_asyncmsgq_write_before_poll(i->userdata);
+ return 0;
+}
+
+static void asyncmsgq_write_after(pa_rtpoll_item *i) {
+ pa_assert(i);
+
+ pa_assert((i->pollfd[0].revents & ~POLLIN) == 0);
+ pa_asyncmsgq_write_after_poll(i->userdata);
+}
+
+pa_rtpoll_item *pa_rtpoll_item_new_asyncmsgq_write(pa_rtpoll *p, pa_rtpoll_priority_t prio, pa_asyncmsgq *q) {
+ pa_rtpoll_item *i;
+ struct pollfd *pollfd;
+
+ pa_assert(p);
+ pa_assert(q);
+
+ i = pa_rtpoll_item_new(p, prio, 1);
+
+ pollfd = pa_rtpoll_item_get_pollfd(i, NULL);
+ pollfd->fd = pa_asyncmsgq_write_fd(q);
+ pollfd->events = POLLIN;
+
+ i->before_cb = asyncmsgq_write_before;
+ i->after_cb = asyncmsgq_write_after;
+ i->work_cb = NULL;
+ i->userdata = q;
+
+ return i;
+}
+
+void pa_rtpoll_quit(pa_rtpoll *p) {
+ pa_assert(p);
+
+ p->quit = TRUE;
+}