Re: [PATCH 3/9] worker: use glib main loop

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Hi

----- Original Message -----
> > 
> > On Wed, 2015-12-09 at 12:17 +0000, Frediano Ziglio wrote:
> > > From: Marc-André Lureau <marcandre.lureau@xxxxxxxxx>
> > > 
> > > Clean up, more extensible.
> > > ---
> > >  server/Makefile.am         |   2 -
> > >  server/red-worker.c        | 357
> > >  ++++++++++++++++++++++++++++----------------
> > > -
> > >  server/red-worker.h        |   1 +
> > >  server/spice_timer_queue.c | 273 ----------------------------------
> > >  server/spice_timer_queue.h |  43 ------
> > >  5 files changed, 224 insertions(+), 452 deletions(-)
> > >  delete mode 100644 server/spice_timer_queue.c
> > >  delete mode 100644 server/spice_timer_queue.h
> > > 
> > > diff --git a/server/Makefile.am b/server/Makefile.am
> > > index d4fc972..88825d8 100644
> > > --- a/server/Makefile.am
> > > +++ b/server/Makefile.am
> > > @@ -121,8 +121,6 @@ libspice_server_la_SOURCES =			\
> > >  	spice.h					\
> > >  	stat.h					\
> > >  	spicevmc.c				\
> > > -	spice_timer_queue.c			\
> > > -	spice_timer_queue.h			\
> > >  	zlib-encoder.c				\
> > >  	zlib-encoder.h				\
> > >  	image-cache.h			\
> > > diff --git a/server/red-worker.c b/server/red-worker.c
> > > index baa8458..9f2aba1 100644
> > > --- a/server/red-worker.c
> > > +++ b/server/red-worker.c
> > > @@ -49,30 +49,22 @@
> > >  
> > >  #include "spice.h"
> > >  #include "red-worker.h"
> > > -#include "spice_timer_queue.h"
> > >  #include "cursor-channel.h"
> > >  #include "tree.h"
> > >  
> > >  #define CMD_RING_POLL_TIMEOUT 10 //milli
> > >  #define CMD_RING_POLL_RETRIES 200
> > >  
> > > -#define MAX_EVENT_SOURCES 20
> > >  #define INF_EVENT_WAIT ~0
> > >  
> > > -struct SpiceWatch {
> > > -    struct RedWorker *worker;
> > > -    SpiceWatchFunc watch_func;
> > > -    void *watch_func_opaque;
> > > -};
> > > -
> > >  struct RedWorker {
> > >      pthread_t thread;
> > >      clockid_t clockid;
> > >      QXLInstance *qxl;
> > >      RedDispatcher *red_dispatcher;
> > >      int running;
> > > -    struct pollfd poll_fds[MAX_EVENT_SOURCES];
> > > -    struct SpiceWatch watches[MAX_EVENT_SOURCES];
> > > +
> > > +    GMainContext *main_context;
> > >      unsigned int event_timeout;
> > >  
> > >      DisplayChannel *display_channel;
> > > @@ -99,6 +91,13 @@ struct RedWorker {
> > >      FILE *record_fd;
> > >  };
> > >  
> > > +GMainContext* red_worker_get_context(RedWorker *worker)
> > > +{
> > > +    spice_return_val_if_fail(worker, NULL);
> > > +
> > > +    return worker->main_context;
> > > +}
> > 
> > I still prefer get_main_context() here.
> > 
> 
> I would prefer renaming main_context to event_context and use
> get_event_context.

That start to sound quite foreign to someone used to reading glib code. Imho, it's always a good idea to name it after the type, unless you have conflict of naming with other types. Here it's not the case.

> > 
> > > +
> > >  QXLInstance* red_worker_get_qxl(RedWorker *worker)
> > >  {
> > >      spice_return_val_if_fail(worker != NULL, NULL);
> > > @@ -510,81 +509,159 @@ static int
> > > common_channel_config_socket(RedChannelClient *rcc)
> > >      return TRUE;
> > >  }
> > >  
> > > -static void worker_watch_update_mask(SpiceWatch *watch, int event_mask)
> > > +typedef struct SpiceTimer {
> > > +    SpiceTimerFunc func;
> > > +    void *opaque;
> > > +    guint source_id;
> > > +} SpiceTimer;
> > > +
> > > +static SpiceTimer* worker_timer_add(SpiceTimerFunc func, void *opaque)
> > >  {
> > > -    struct RedWorker *worker;
> > > -    int i;
> > > +    SpiceTimer *timer = g_new0(SpiceTimer, 1);
> > > +
> > > +    timer->func = func;
> > > +    timer->opaque = opaque;
> > > +
> > > +    return timer;
> > > +}
> > > +
> > > +static gboolean worker_timer_func(gpointer user_data)
> > > +{
> > > +    SpiceTimer *timer = user_data;
> > > +
> > > +    timer->source_id = 0;
> > > +    timer->func(timer->opaque);
> > > +    /* timer might be free after func(), don't touch */
> > > +
> > > +    return FALSE;
> > > +}
> > >  
> > > -    if (!watch) {
> > > +static void worker_timer_cancel(SpiceTimer *timer)
> > > +{
> > > +    if (timer->source_id == 0)
> > >          return;
> > > -    }
> > >  
> > > -    worker = watch->worker;
> > > -    i = watch - worker->watches;
> > > +    g_source_remove(timer->source_id);
> > > +    timer->source_id = 0;
> > > +}
> > >  
> > > -    worker->poll_fds[i].events = 0;
> > > -    if (event_mask & SPICE_WATCH_EVENT_READ) {
> > > -        worker->poll_fds[i].events |= POLLIN;
> > > -    }
> > > -    if (event_mask & SPICE_WATCH_EVENT_WRITE) {
> > > -        worker->poll_fds[i].events |= POLLOUT;
> > > +static void worker_timer_start(SpiceTimer *timer, uint32_t ms)
> > > +{
> > > +    worker_timer_cancel(timer);
> > > +
> > > +    timer->source_id = g_timeout_add(ms, worker_timer_func, timer);
> > > +}
> > > +
> > > +static void worker_timer_remove(SpiceTimer *timer)
> > > +{
> > > +    worker_timer_cancel(timer);
> > > +    g_free(timer);
> > > +}
> > > +
> > > +static GIOCondition spice_event_to_giocondition(int event_mask)
> > > +{
> > > +    GIOCondition condition = 0;
> > > +
> > > +    if (event_mask & SPICE_WATCH_EVENT_READ)
> > > +        condition |= G_IO_IN;
> > > +    if (event_mask & SPICE_WATCH_EVENT_WRITE)
> > > +        condition |= G_IO_OUT;
> > > +
> > > +    return condition;
> > > +}
> > > +
> > > +static int giocondition_to_spice_event(GIOCondition condition)
> > > +{
> > > +    int event = 0;
> > > +
> > > +    if (condition & G_IO_IN)
> > > +        event |= SPICE_WATCH_EVENT_READ;
> > > +    if (condition & G_IO_OUT)
> > > +        event |= SPICE_WATCH_EVENT_WRITE;
> > > +
> > > +    return event;
> > > +}
> > > +
> > > +struct SpiceWatch {
> > > +    GIOChannel *channel;
> > > +    GSource *source;
> > > +    RedChannelClient *rcc;
> > > +    SpiceWatchFunc func;
> > > +};
> > > +
> > > +static gboolean watch_func(GIOChannel *source, GIOCondition condition,
> > > +                           gpointer data)
> > > +{
> > > +    SpiceWatch *watch = data;
> > > +    int fd = g_io_channel_unix_get_fd(source);
> > > +
> > > +    watch->func(fd, giocondition_to_spice_event(condition), watch->rcc);
> > > +
> > > +    return TRUE;
> > > +}
> > > +
> > > +static void worker_watch_update_mask(SpiceWatch *watch, int events)
> > > +{
> > > +    RedWorker *worker;
> > > +
> > > +    spice_return_if_fail(watch != NULL);
> > > +    worker = SPICE_CONTAINEROF(watch->rcc->channel, CommonChannel, base)
> > > ->worker;
> > > +
> > > +    if (watch->source) {
> > > +        g_source_destroy(watch->source);
> > > +        watch->source = NULL;
> > >      }
> > > +
> > > +    if (!events)
> > > +        return;
> > > +
> > > +    watch->source = g_io_create_watch(watch->channel,
> > > spice_event_to_giocondition(events));
> > > +    g_source_set_callback(watch->source, (GSourceFunc)watch_func, watch,
> > > NULL);
> > > +    g_source_attach(watch->source, worker->main_context);
> > >  }
> > >  
> > > -static SpiceWatch *worker_watch_add(int fd, int event_mask,
> > > SpiceWatchFunc
> > > func, void *opaque)
> > > +static SpiceWatch* worker_watch_add(int fd, int events, SpiceWatchFunc
> > > func,
> > > void *opaque)
> > >  {
> > > -    /* Since we are a channel core implementation, we always get called
> > > from
> > > -       red_channel_client_create(), so opaque always is our rcc */
> > 
> > (repeating my comment from the previous review):
> > 
> > I think I would leave this comment in. It feels a bit fragile to make this
> > assumption in the first place, so I'd at least like a comment explaining
> > why
> > we
> > can assume this.
> > 
> > >      RedChannelClient *rcc = opaque;
> > > -    struct RedWorker *worker;
> > > -    int i;
> > > +    RedWorker *worker;
> > > +    SpiceWatch *watch;
> > > +
> > > +    spice_return_val_if_fail(rcc != NULL, NULL);
> > > +    spice_return_val_if_fail(fd != -1, NULL);
> > > +    spice_return_val_if_fail(func != NULL, NULL);
> > >  
> > >      /* Since we are called from red_channel_client_create()
> > >         CommonChannelClient->worker has not been set yet! */
> > >      worker = SPICE_CONTAINEROF(rcc->channel, CommonChannel,
> > >      base)->worker;
> > > +    spice_return_val_if_fail(worker != NULL, NULL);
> > > +    spice_return_val_if_fail(worker->main_context != NULL, NULL);
> > >  
> > > -    /* Search for a free slot in our poll_fds & watches arrays */
> > > -    for (i = 0; i < MAX_EVENT_SOURCES; i++) {
> > > -        if (worker->poll_fds[i].fd == -1) {
> > > -            break;
> > > -        }
> > > -    }
> > > -    if (i == MAX_EVENT_SOURCES) {
> > > -        spice_warning("could not add a watch for channel type %u id %u",
> > > -                      rcc->channel->type, rcc->channel->id);
> > > -        return NULL;
> > > -    }
> > > +    watch = g_new0(SpiceWatch, 1);
> > > +    watch->channel = g_io_channel_unix_new(fd);
> > > +    watch->rcc = rcc;
> > > +    watch->func = func;
> > >  
> > > -    worker->poll_fds[i].fd = fd;
> > > -    worker->watches[i].worker = worker;
> > > -    worker->watches[i].watch_func = func;
> > > -    worker->watches[i].watch_func_opaque = opaque;
> > > -    worker_watch_update_mask(&worker->watches[i], event_mask);
> > > +    worker_watch_update_mask(watch, events);
> > >  
> > > -    return &worker->watches[i];
> > > +    return watch;
> > >  }
> > >  
> > >  static void worker_watch_remove(SpiceWatch *watch)
> > >  {
> > > -    if (!watch) {
> > > -        return;
> > > -    }
> > > +    spice_return_if_fail(watch != NULL);
> > >  
> > > -    /* Note we don't touch the poll_fd here, to avoid the
> > > -       poll_fds/watches table entry getting re-used in the same
> > > -       red_worker_main loop over the fds as it is removed.
> > > +    if (watch->source)
> > > +        g_source_destroy(watch->source);
> > >  
> > > -       This is done because re-using it while events were pending on
> > > -       the fd previously occupying the slot would lead to incorrectly
> > > -       calling the watch_func for the new fd. */
> > > -    memset(watch, 0, sizeof(SpiceWatch));
> > > +    g_io_channel_unref(watch->channel);
> > > +    g_free(watch);
> > >  }
> > >  
> > > -SpiceCoreInterface worker_core = {
> > > -    .timer_add = spice_timer_queue_add,
> > > -    .timer_start = spice_timer_set,
> > > -    .timer_cancel = spice_timer_cancel,
> > > -    .timer_remove = spice_timer_remove,
> > > +static const SpiceCoreInterface worker_core = {
> > > +    .timer_add = worker_timer_add,
> > > +    .timer_start = worker_timer_start,
> > > +    .timer_cancel = worker_timer_cancel,
> > > +    .timer_remove = worker_timer_remove,
> > >  
> > >      .watch_update_mask = worker_watch_update_mask,
> > >      .watch_add = worker_watch_add,
> > > @@ -1527,24 +1604,91 @@ static void register_callbacks(Dispatcher
> > > *dispatcher)
> > >  
> > >  
> > >  
> > > -static void handle_dev_input(int fd, int event, void *opaque)
> > > +static gboolean worker_dispatcher_cb(GIOChannel *source, GIOCondition
> > > condition,
> > > +                                     gpointer data)
> > >  {
> > > -    RedWorker *worker = opaque;
> > > +    RedWorker *worker = data;
> > >  
> > > +    spice_debug(NULL);
> > 
> > Remove this debug output
> > 
> > 
> > >      dispatcher_handle_recv_read(red_dispatcher_get_dispatcher(worker
> > > ->red_dispatcher));
> > > +
> > > +    return TRUE;
> > > +}
> > > +
> > > +typedef struct RedWorkerSource {
> > > +    GSource source;
> > > +    RedWorker *worker;
> > > +} RedWorkerSource;
> > > +
> > > +static gboolean worker_source_prepare(GSource *source, gint *p_timeout)
> > > +{
> > > +    RedWorkerSource *wsource = (RedWorkerSource *)source;
> > > +    RedWorker *worker = wsource->worker;
> > > +    unsigned int timeout;
> > > +
> > > +    timeout = MIN(worker->event_timeout,
> > > +                  display_channel_get_streams_timeout(worker
> > > ->display_channel));
> > > +
> > > +    *p_timeout = (timeout == INF_EVENT_WAIT) ? -1 : timeout;
> > > +    if (*p_timeout == 0)
> > > +        return TRUE;
> > > +
> > > +    return FALSE; /* do no timeout poll */
> > 
> > (repeating comment from previous review:)
> > 
> > This comment is confusing. it implies that returning FALSE means that we
> > don't
> > poll? In fact, returning TRUE from the prepare function indicates that the
> > source is already ready and we don't need to poll...
> > 
> > 
> > > +}
> > > +
> > > +static gboolean worker_source_check(GSource *source)
> > > +{
> > > +    RedWorkerSource *wsource = (RedWorkerSource *)source;
> > > +    RedWorker *worker = wsource->worker;
> > > +
> > > +    return worker->running /* TODO && worker->pending_process */;
> > > +}
> > > +
> > > +static gboolean worker_source_dispatch(GSource *source, GSourceFunc
> > > callback,
> > > +                                       gpointer user_data)
> > > +{
> > > +    RedWorkerSource *wsource = (RedWorkerSource *)source;
> > > +    RedWorker *worker = wsource->worker;
> > > +    DisplayChannel *display = worker->display_channel;
> > > +    int ring_is_empty;
> > > +
> > > +    /* during migration, in the dest, the display channel can be
> > > initialized
> > > +       while the global lz data not since migrate data msg hasn't been
> > > +       received yet */
> > > +    /* FIXME: why is this here, and not in display_channel_create */
> > > +    display_channel_free_glz_drawables_to_free(display);
> > 
> > (repeating comment from previous review):
> > In the previous version, this call was inside of a 'if (worker
> > ->display_channel)' branch. Here that is not checked.
> > 
> > > +
> > > +    /* FIXME: could use its own source */
> > > +    stream_timeout(display);
> > > +
> > > +    worker->event_timeout = INF_EVENT_WAIT;
> > > +    red_process_cursor(worker, MAX_PIPE_SIZE, &ring_is_empty);
> > > +    red_process_display(worker, MAX_PIPE_SIZE, &ring_is_empty);
> > > +
> > > +    /* FIXME: remove me? that should be handled by watch out condition
> > > */
> > > +    red_push(worker);
> > > +
> > > +    return TRUE;
> > >  }
> > >  
> > > +/* cannot be const */
> > > +static GSourceFuncs worker_source_funcs = {
> > > +    .prepare = worker_source_prepare,
> > > +    .check = worker_source_check,
> > > +    .dispatch = worker_source_dispatch,
> > > +};
> > > +
> > >  RedWorker* red_worker_new(QXLInstance *qxl, RedDispatcher
> > >  *red_dispatcher)
> > >  {
> > >      QXLDevInitInfo init_info;
> > >      RedWorker *worker;
> > >      Dispatcher *dispatcher;
> > > -    int i;
> > >      const char *record_filename;
> > >  
> > >      qxl->st->qif->get_init_info(qxl, &init_info);
> > >  
> > >      worker = spice_new0(RedWorker, 1);
> > > +    worker->main_context = g_main_context_new();
> > >  
> > >      record_filename = getenv("SPICE_WORKER_RECORD_FILENAME");
> > >      if (record_filename) {
> > > @@ -1578,15 +1722,18 @@ RedWorker* red_worker_new(QXLInstance *qxl,
> > > RedDispatcher *red_dispatcher)
> > >      worker->wakeup_counter = stat_add_counter(worker->stat, "wakeups",
> > >      TRUE);
> > >      worker->command_counter = stat_add_counter(worker->stat, "commands",
> > > TRUE);
> > >  #endif
> > > -    for (i = 0; i < MAX_EVENT_SOURCES; i++) {
> > > -        worker->poll_fds[i].fd = -1;
> > > -    }
> > >  
> > > -    worker->poll_fds[0].fd = dispatcher_get_recv_fd(dispatcher);
> > > -    worker->poll_fds[0].events = POLLIN;
> > > -    worker->watches[0].worker = worker;
> > > -    worker->watches[0].watch_func = handle_dev_input;
> > > -    worker->watches[0].watch_func_opaque = worker;
> > > +    GIOChannel *channel =
> > > g_io_channel_unix_new(dispatcher_get_recv_fd(dispatcher));
> > > +    GSource *source = g_io_create_watch(channel, G_IO_IN);
> > > +    g_source_set_callback(source, (GSourceFunc)worker_dispatcher_cb,
> > > worker,
> > > NULL);
> > > +    g_source_attach(source, worker->main_context);
> > > +    g_source_unref(source);
> > > +
> > > +    source = g_source_new(&worker_source_funcs,
> > > sizeof(RedWorkerSource));
> > > +    RedWorkerSource *wsource = (RedWorkerSource *)source;
> > > +    wsource->worker = worker;
> > > +    g_source_attach(source, worker->main_context);
> > > +    g_source_unref(source);
> > >  
> > >      memslot_info_init(&worker->mem_slots,
> > >                        init_info.num_memslots_groups,
> > > @@ -1615,10 +1762,6 @@ SPICE_GNUC_NORETURN static void
> > > *red_worker_main(void
> > > *arg)
> > >      spice_assert(MAX_PIPE_SIZE > WIDE_CLIENT_ACK_WINDOW &&
> > >             MAX_PIPE_SIZE > NARROW_CLIENT_ACK_WINDOW); //ensure wakeup by
> > >             ack
> > > message
> > >  
> > > -    if (!spice_timer_queue_create()) {
> > > -        spice_error("failed to create timer queue");
> > > -    }
> > > -
> > >      if (pthread_getcpuclockid(pthread_self(), &worker->clockid)) {
> > >          spice_warning("getcpuclockid failed");
> > >      }
> > > @@ -1626,66 +1769,12 @@ SPICE_GNUC_NORETURN static void
> > > *red_worker_main(void
> > > *arg)
> > >      RED_CHANNEL(worker->cursor_channel)->thread_id = pthread_self();
> > >      RED_CHANNEL(worker->display_channel)->thread_id = pthread_self();
> > >  
> > > -    for (;;) {
> > > -        int i, num_events;
> > > -        unsigned int timeout;
> > > -
> > > -        timeout = spice_timer_queue_get_timeout_ms();
> > > -        worker->event_timeout = MIN(timeout, worker->event_timeout);
> > > -        timeout = display_channel_get_streams_timeout(worker
> > > ->display_channel);
> > > -        worker->event_timeout = MIN(timeout, worker->event_timeout);
> > > -        num_events = poll(worker->poll_fds, MAX_EVENT_SOURCES, worker
> > > ->event_timeout);
> > > -        stream_timeout(worker->display_channel);
> > > -        spice_timer_queue_cb();
> > > -
> > > -        if (worker->display_channel) {
> > > -            /* during migration, in the dest, the display channel can be
> > > initialized
> > > -               while the global lz data not since migrate data msg
> > > hasn't
> > > been
> > > -               received yet */
> > > -            display_channel_free_glz_drawables_to_free(worker
> > > ->display_channel);
> > > -        }
> > > -
> > > -        worker->event_timeout = INF_EVENT_WAIT;
> > > -        if (num_events == -1) {
> > > -            if (errno != EINTR) {
> > > -                spice_error("poll failed, %s", strerror(errno));
> > > -            }
> > > -        }
> > > -
> > > -        for (i = 0; i < MAX_EVENT_SOURCES; i++) {
> > > -            /* The watch may have been removed by the watch-func from
> > > -               another fd (ie a disconnect through the dispatcher),
> > > -               in this case watch_func is NULL. */
> > > -            if (worker->poll_fds[i].revents &&
> > > worker->watches[i].watch_func)
> > > {
> > > -                int events = 0;
> > > -                if (worker->poll_fds[i].revents & POLLIN) {
> > > -                    events |= SPICE_WATCH_EVENT_READ;
> > > -                }
> > > -                if (worker->poll_fds[i].revents & POLLOUT) {
> > > -                    events |= SPICE_WATCH_EVENT_WRITE;
> > > -                }
> > > -                worker->watches[i].watch_func(worker->poll_fds[i].fd,
> > > events,
> > > -                                        worker
> > > ->watches[i].watch_func_opaque);
> > > -            }
> > > -        }
> > > -
> > > -        /* Clear the poll_fd for any removed watches, see the comment in
> > > -           watch_remove for why we don't do this there. */
> > > -        for (i = 0; i < MAX_EVENT_SOURCES; i++) {
> > > -            if (!worker->watches[i].watch_func) {
> > > -                worker->poll_fds[i].fd = -1;
> > > -            }
> > > -        }
> > > -
> > > -        if (worker->running) {
> > > -            int ring_is_empty;
> > > -            red_process_cursor(worker, MAX_PIPE_SIZE, &ring_is_empty);
> > > -            red_process_display(worker, MAX_PIPE_SIZE, &ring_is_empty);
> > > -        }
> > > -        red_push(worker);
> > > -    }
> > > +    GMainLoop *loop = g_main_loop_new(worker->main_context, FALSE);
> > > +    g_main_loop_run(loop);
> > > +    g_main_loop_unref(loop);
> > >  
> > > -    spice_warn_if_reached();
> > > +    /* FIXME: free worker, and join threads */
> > > +    abort();
> > 
> > why abort()?
> > 
> > >  }
> > >  
> > >  bool red_worker_run(RedWorker *worker)
> > > diff --git a/server/red-worker.h b/server/red-worker.h
> > > index 44f35f7..b55a45c 100644
> > > --- a/server/red-worker.h
> > > +++ b/server/red-worker.h
> > > @@ -97,6 +97,7 @@ bool       red_worker_run(RedWorker *worker);
> > >  QXLInstance* red_worker_get_qxl(RedWorker *worker);
> > >  RedChannel* red_worker_get_cursor_channel(RedWorker *worker);
> > >  RedChannel* red_worker_get_display_channel(RedWorker *worker);
> > > +GMainContext* red_worker_get_context(RedWorker *worker);
> > >  clockid_t red_worker_get_clockid(RedWorker *worker);
> > >  RedMemSlotInfo* red_worker_get_memslot(RedWorker *worker);
> > >  
> > > diff --git a/server/spice_timer_queue.c b/server/spice_timer_queue.c
> > > deleted file mode 100644
> > > index 60017cc..0000000
> > > --- a/server/spice_timer_queue.c
> > > +++ /dev/null
> > > @@ -1,273 +0,0 @@
> > > -/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
> > > -/*
> > > -   Copyright (C) 2013 Red Hat, Inc.
> > > -
> > > -   This library 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 2.1 of the License, or (at your option) any later version.
> > > -
> > > -   This library is distributed in the hope that it will be useful,
> > > -   but WITHOUT ANY WARRANTY; without even the implied warranty of
> > > -   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> > > -   Lesser General Public License for more details.
> > > -
> > > -   You should have received a copy of the GNU Lesser General Public
> > > -   License along with this library; if not, see
> > > <http://www.gnu.org/licenses/
> > > >.
> > > -*/
> > > -#include <config.h>
> > > -#include <pthread.h>
> > > -#include "red-common.h"
> > > -#include "spice_timer_queue.h"
> > > -#include "common/ring.h"
> > > -
> > > -static Ring timer_queue_list;
> > > -static int queue_count = 0;
> > > -static pthread_mutex_t queue_list_lock = PTHREAD_MUTEX_INITIALIZER;
> > > -
> > > -static void spice_timer_queue_init(void)
> > > -{
> > > -    ring_init(&timer_queue_list);
> > > -}
> > > -
> > > -struct SpiceTimer {
> > > -    RingItem link;
> > > -    RingItem active_link;
> > > -
> > > -    SpiceTimerFunc func;
> > > -    void *opaque;
> > > -
> > > -    SpiceTimerQueue *queue;
> > > -
> > > -    int is_active;
> > > -    uint32_t ms;
> > > -    uint64_t expiry_time;
> > > -};
> > > -
> > > -struct SpiceTimerQueue {
> > > -    RingItem link;
> > > -    pthread_t thread;
> > > -    Ring timers;
> > > -    Ring active_timers;
> > > -};
> > > -
> > > -static SpiceTimerQueue *spice_timer_queue_find(void)
> > > -{
> > > -    pthread_t self = pthread_self();
> > > -    RingItem *queue_item;
> > > -
> > > -    RING_FOREACH(queue_item, &timer_queue_list) {
> > > -         SpiceTimerQueue *queue = SPICE_CONTAINEROF(queue_item,
> > > SpiceTimerQueue, link);
> > > -
> > > -         if (pthread_equal(self, queue->thread) != 0) {
> > > -            return queue;
> > > -         }
> > > -    }
> > > -
> > > -    return NULL;
> > > -}
> > > -
> > > -static SpiceTimerQueue *spice_timer_queue_find_with_lock(void)
> > > -{
> > > -    SpiceTimerQueue *queue;
> > > -
> > > -    pthread_mutex_lock(&queue_list_lock);
> > > -    queue = spice_timer_queue_find();
> > > -    pthread_mutex_unlock(&queue_list_lock);
> > > -    return queue;
> > > -}
> > > -
> > > -int spice_timer_queue_create(void)
> > > -{
> > > -    SpiceTimerQueue *queue;
> > > -
> > > -    pthread_mutex_lock(&queue_list_lock);
> > > -    if (queue_count == 0) {
> > > -        spice_timer_queue_init();
> > > -    }
> > > -
> > > -    if (spice_timer_queue_find() != NULL) {
> > > -        spice_printerr("timer queue was already created for the
> > > thread");
> > > -        return FALSE;
> > > -    }
> > > -
> > > -    queue = spice_new0(SpiceTimerQueue, 1);
> > > -    queue->thread = pthread_self();
> > > -    ring_init(&queue->timers);
> > > -    ring_init(&queue->active_timers);
> > > -
> > > -    ring_add(&timer_queue_list, &queue->link);
> > > -    queue_count++;
> > > -
> > > -    pthread_mutex_unlock(&queue_list_lock);
> > > -
> > > -    return TRUE;
> > > -}
> > > -
> > > -void spice_timer_queue_destroy(void)
> > > -{
> > > -    RingItem *item;
> > > -    SpiceTimerQueue *queue;
> > > -
> > > -    pthread_mutex_lock(&queue_list_lock);
> > > -    queue = spice_timer_queue_find();
> > > -
> > > -    spice_assert(queue != NULL);
> > > -
> > > -    while ((item = ring_get_head(&queue->timers))) {
> > > -        SpiceTimer *timer;
> > > -
> > > -        timer = SPICE_CONTAINEROF(item, SpiceTimer, link);
> > > -        spice_timer_remove(timer);
> > > -    }
> > > -
> > > -    ring_remove(&queue->link);
> > > -    free(queue);
> > > -    queue_count--;
> > > -
> > > -    pthread_mutex_unlock(&queue_list_lock);
> > > -}
> > > -
> > > -SpiceTimer *spice_timer_queue_add(SpiceTimerFunc func, void *opaque)
> > > -{
> > > -    SpiceTimer *timer = spice_new0(SpiceTimer, 1);
> > > -    SpiceTimerQueue *queue = spice_timer_queue_find_with_lock();
> > > -
> > > -    spice_assert(queue != NULL);
> > > -
> > > -    ring_item_init(&timer->link);
> > > -    ring_item_init(&timer->active_link);
> > > -
> > > -    timer->opaque = opaque;
> > > -    timer->func = func;
> > > -    timer->queue = queue;
> > > -
> > > -    ring_add(&queue->timers, &timer->link);
> > > -
> > > -    return timer;
> > > -}
> > > -
> > > -static void _spice_timer_set(SpiceTimer *timer, uint32_t ms, uint64_t
> > > now)
> > > -{
> > > -    RingItem *next_item;
> > > -    SpiceTimerQueue *queue;
> > > -
> > > -    if (timer->is_active) {
> > > -        spice_timer_cancel(timer);
> > > -    }
> > > -
> > > -    queue = timer->queue;
> > > -    timer->expiry_time = now + ms;
> > > -    timer->ms = ms;
> > > -
> > > -    RING_FOREACH(next_item, &queue->active_timers) {
> > > -        SpiceTimer *next_timer = SPICE_CONTAINEROF(next_item,
> > > SpiceTimer,
> > > active_link);
> > > -
> > > -        if (timer->expiry_time <= next_timer->expiry_time) {
> > > -            break;
> > > -        }
> > > -    }
> > > -
> > > -    if (next_item) {
> > > -        ring_add_before(&timer->active_link, next_item);
> > > -    } else {
> > > -        ring_add_before(&timer->active_link, &queue->active_timers);
> > > -    }
> > > -    timer->is_active = TRUE;
> > > -}
> > > -
> > > -void spice_timer_set(SpiceTimer *timer, uint32_t ms)
> > > -{
> > > -    struct timespec now;
> > > -
> > > -    spice_assert(pthread_equal(timer->queue->thread, pthread_self()) !=
> > > 0);
> > > -
> > > -    clock_gettime(CLOCK_MONOTONIC, &now);
> > > -    _spice_timer_set(timer, ms,
> > > -                     (uint64_t)now.tv_sec * 1000 + (now.tv_nsec / 1000 /
> > > 1000));
> > > -}
> > > -
> > > -void spice_timer_cancel(SpiceTimer *timer)
> > > -{
> > > -    spice_assert(pthread_equal(timer->queue->thread, pthread_self()) !=
> > > 0);
> > > -
> > > -    if (!ring_item_is_linked(&timer->active_link)) {
> > > -        spice_assert(!timer->is_active);
> > > -        return;
> > > -    }
> > > -
> > > -    spice_assert(timer->is_active);
> > > -    ring_remove(&timer->active_link);
> > > -    timer->is_active = FALSE;
> > > -}
> > > -
> > > -void spice_timer_remove(SpiceTimer *timer)
> > > -{
> > > -    spice_assert(timer->queue);
> > > -    spice_assert(ring_item_is_linked(&timer->link));
> > > -    spice_assert(pthread_equal(timer->queue->thread, pthread_self()) !=
> > > 0);
> > > -
> > > -    if (timer->is_active) {
> > > -        spice_assert(ring_item_is_linked(&timer->active_link));
> > > -        ring_remove(&timer->active_link);
> > > -    }
> > > -    ring_remove(&timer->link);
> > > -    free(timer);
> > > -}
> > > -
> > > -unsigned int spice_timer_queue_get_timeout_ms(void)
> > > -{
> > > -    struct timespec now;
> > > -    int64_t now_ms;
> > > -    RingItem *head;
> > > -    SpiceTimer *head_timer;
> > > -    SpiceTimerQueue *queue = spice_timer_queue_find_with_lock();
> > > -
> > > -    spice_assert(queue != NULL);
> > > -
> > > -    if (ring_is_empty(&queue->active_timers)) {
> > > -        return -1;
> > > -    }
> > > -
> > > -    head = ring_get_head(&queue->active_timers);
> > > -    head_timer = SPICE_CONTAINEROF(head, SpiceTimer, active_link);
> > > -
> > > -    clock_gettime(CLOCK_MONOTONIC, &now);
> > > -    now_ms = ((int64_t)now.tv_sec * 1000) + (now.tv_nsec / 1000 / 1000);
> > > -
> > > -    return MAX(0, ((int64_t)head_timer->expiry_time - now_ms));
> > > -}
> > > -
> > > -
> > > -void spice_timer_queue_cb(void)
> > > -{
> > > -    struct timespec now;
> > > -    uint64_t now_ms;
> > > -    RingItem *head;
> > > -    SpiceTimerQueue *queue = spice_timer_queue_find_with_lock();
> > > -
> > > -    spice_assert(queue != NULL);
> > > -
> > > -    if (ring_is_empty(&queue->active_timers)) {
> > > -        return;
> > > -    }
> > > -
> > > -    clock_gettime(CLOCK_MONOTONIC, &now);
> > > -    now_ms = ((uint64_t)now.tv_sec * 1000) + (now.tv_nsec / 1000 /
> > > 1000);
> > > -
> > > -    while ((head = ring_get_head(&queue->active_timers))) {
> > > -        SpiceTimer *timer = SPICE_CONTAINEROF(head, SpiceTimer,
> > > active_link);
> > > -
> > > -        if (timer->expiry_time > now_ms) {
> > > -            break;
> > > -        } else {
> > > -            /* Remove active timer before calling the timer function.
> > > -             * Timer function could delete the timer making the timer
> > > -             * pointer point to freed data.
> > > -             */
> > > -            spice_timer_cancel(timer);
> > > -            timer->func(timer->opaque);
> > > -            /* timer could now be invalid ! */
> > > -        }
> > > -    }
> > > -}
> > > diff --git a/server/spice_timer_queue.h b/server/spice_timer_queue.h
> > > deleted file mode 100644
> > > index a84f6cd..0000000
> > > --- a/server/spice_timer_queue.h
> > > +++ /dev/null
> > > @@ -1,43 +0,0 @@
> > > -/*
> > > -   Copyright (C) 2013 Red Hat, Inc.
> > > -
> > > -   This library 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 2.1 of the License, or (at your option) any later version.
> > > -
> > > -   This library is distributed in the hope that it will be useful,
> > > -   but WITHOUT ANY WARRANTY; without even the implied warranty of
> > > -   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> > > -   Lesser General Public License for more details.
> > > -
> > > -   You should have received a copy of the GNU Lesser General Public
> > > -   License along with this library; if not, see
> > > <http://www.gnu.org/licenses/
> > > >.
> > > -*/
> > > -
> > > -#ifndef _H_SPICE_TIMER_QUEUE
> > > -#define _H_SPICE_TIMER_QUEUE
> > > -
> > > -#include  <stdint.h>
> > > -#include "spice.h"
> > > -
> > > -typedef struct SpiceTimerQueue SpiceTimerQueue;
> > > -
> > > -/* create/destroy a timer queue for the current thread.
> > > - * In order to execute the timers functions, spice_timer_queue_cb should
> > > be
> > > called
> > > - * periodically, according to spice_timer_queue_get_timeout_ms */
> > > -int spice_timer_queue_create(void);
> > > -void spice_timer_queue_destroy(void);
> > > -
> > > -SpiceTimer *spice_timer_queue_add(SpiceTimerFunc func, void *opaque);
> > > -void spice_timer_set(SpiceTimer *timer, uint32_t ms);
> > > -void spice_timer_cancel(SpiceTimer *timer);
> > > -void spice_timer_remove(SpiceTimer *timer);
> > > -
> > > -/* returns the time left till the earliest timer in the queue expires.
> > > - * returns (unsigned)-1 if there are no active timers */
> > > -unsigned int spice_timer_queue_get_timeout_ms(void);
> > > -/* call the timeout callbacks of all the expired timers */
> > > -void spice_timer_queue_cb(void);
> > > -
> > > -#endif
> > 
> > Reviewed-by: Jonathon Jongsma <jjonsma@xxxxxxxxxx>
> > 
> 
> Can you send an updated patch?
> 
> 
> Frediano
> 
> Note: this patch is part of changes we'll merge next year

Ah? you mean after a release of current code base?

> _______________________________________________
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> 
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