#include <string.h>
#include <errno.h>
-#ifdef __linux__
-#include <sys/utsname.h>
-#endif
-
#ifdef HAVE_POLL_H
#include <poll.h>
#else
#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"
+/* #define DEBUG_TIMING */
+
struct pa_rtpoll {
struct pollfd *pollfd, *pollfd2;
unsigned n_pollfd_alloc, n_pollfd_used;
- pa_bool_t timer_enabled;
struct timeval next_elapse;
+ pa_bool_t timer_enabled:1;
- pa_bool_t scan_for_dead;
- pa_bool_t running, installed, rebuild_needed, quit;
+ 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;
- timer_t timer;
- pa_bool_t timer_armed;
-#ifdef __linux__
- pa_bool_t dont_use_ppoll;
-#endif
+#ifdef DEBUG_TIMING
+ pa_usec_t timestamp;
+ pa_usec_t slept, awake;
#endif
PA_LLIST_HEAD(pa_rtpoll_item, items);
PA_STATIC_FLIST_DECLARE(items, 0, pa_xfree);
-static void signal_handler_noop(int s) { /* write(2, "signal\n", 7); */ }
-
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 = FALSE;
-
- {
- 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 = TRUE;
- }
-
-#endif
-
- p->rtsig = -1;
- sigemptyset(&p->sigset_unblocked);
- p->timer = (timer_t) -1;
- p->timer_armed = FALSE;
-
-#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;
- memset(&p->next_elapse, 0, sizeof(p->next_elapse));
+ pa_zero(p->next_elapse);
p->timer_enabled = FALSE;
p->running = FALSE;
- p->installed = FALSE;
p->scan_for_dead = FALSE;
p->rebuild_needed = FALSE;
p->quit = FALSE;
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;
-
-#ifdef HAVE_PPOLL
-# ifdef __linux__
- if (p->dont_use_ppoll)
- return;
-# endif
-
- if ((p->rtsig = pa_rtsig_get_for_thread()) < 0) {
- pa_log_warn("Failed to reserve POSIX realtime signal.");
- return;
- }
-
- pa_log_debug("Acquired POSIX realtime signal %s", pa_sig2str(p->rtsig));
-
- {
- 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) {
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_xfree(p->pollfd);
pa_xfree(p->pollfd2);
-#ifdef HAVE_PPOLL
- if (p->timer != (timer_t) -1)
- timer_delete(p->timer);
-#endif
-
pa_xfree(p);
}
pa_assert(p);
pa_assert(!p->running);
- pa_assert(p->installed);
p->running = TRUE;
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
-
-#ifdef __linux__
- if (!p->dont_use_ppoll)
-#endif
{
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, p->rtsig < 0 ? NULL : &p->sigset_unblocked);
+ r = ppoll(p->pollfd, p->n_pollfd_used, (!wait || p->quit || p->timer_enabled) ? &ts : NULL, NULL);
}
-#ifdef __linux__
- else
+#else
+ 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
+#ifdef DEBUG_TIMING
+ {
+ pa_usec_t now = pa_rtclock_now();
+ p->slept = now - p->timestamp;
+ p->timestamp = now;
+
+ 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
- r = poll(p->pollfd, p->n_pollfd_used, (!wait || p->quit || p->timer_enabled) ? (timeout.tv_sec*1000) + (timeout.tv_usec / 1000) : -1);
if (r < 0) {
if (errno == EAGAIN || errno == EINTR)
return r < 0 ? r : !p->quit;
}
-static void update_timer(pa_rtpoll *p) {
- pa_assert(p);
-
-#ifdef HAVE_PPOLL
-
-#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;
- }
- }
-
- if (p->timer != (timer_t) -1) {
- struct itimerspec its;
- struct timespec ts = { .tv_sec = 0, .tv_nsec = 0 };
- sigset_t ss;
-
- if (p->timer_armed) {
- /* First disarm timer */
- memset(&its, 0, sizeof(its));
- pa_assert_se(timer_settime(p->timer, TIMER_ABSTIME, &its, NULL) == 0);
-
- /* Remove a signal that might be waiting in the signal q */
- pa_assert_se(sigemptyset(&ss) == 0);
- pa_assert_se(sigaddset(&ss, p->rtsig) == 0);
- sigtimedwait(&ss, NULL, &ts);
- }
-
- /* And install the new timer */
- if (p->timer_enabled) {
- memset(&its, 0, sizeof(its));
-
- its.it_value.tv_sec = p->next_elapse.tv_sec;
- its.it_value.tv_nsec = p->next_elapse.tv_usec*1000;
-
- /* Make sure that 0,0 is not understood as
- * "disarming" */
- if (its.it_value.tv_sec == 0 && its.it_value.tv_nsec == 0)
- its.it_value.tv_nsec = 1;
- pa_assert_se(timer_settime(p->timer, TIMER_ABSTIME, &its, NULL) == 0);
- }
-
- p->timer_armed = p->timer_enabled;
- }
-
-#ifdef __linux__
- }
-#endif
-
-#endif
-}
-
void pa_rtpoll_set_timer_absolute(pa_rtpoll *p, pa_usec_t usec) {
pa_assert(p);
pa_timeval_store(&p->next_elapse, usec);
p->timer_enabled = TRUE;
-
- update_timer(p);
}
void pa_rtpoll_set_timer_relative(pa_rtpoll *p, pa_usec_t usec) {
pa_rtclock_get(&p->next_elapse);
pa_timeval_add(&p->next_elapse, usec);
p->timer_enabled = TRUE;
-
- update_timer(p);
}
void pa_rtpoll_set_timer_disabled(pa_rtpoll *p) {
memset(&p->next_elapse, 0, sizeof(p->next_elapse));
p->timer_enabled = FALSE;
-
- update_timer(p);
}
pa_rtpoll_item *pa_rtpoll_item_new(pa_rtpoll *p, pa_rtpoll_priority_t prio, unsigned n_fds) {