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Add invoke method to schedule executing in a main loop

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This commit is contained in:
Wim Taymans 2016-10-24 12:20:44 +02:00
parent 1bd751372e
commit 0373f73bac
8 changed files with 381 additions and 74 deletions
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191
pinos/server/main-loop.c
View file

@ -19,19 +19,56 @@
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <poll.h>
#include <sys/eventfd.h>
#include <gio/gio.h>
#include "spa/include/spa/queue.h"
#include "spa/include/spa/ringbuffer.h"
#include "pinos/server/main-loop.h"
#define PINOS_MAIN_LOOP_GET_PRIVATE(loop) \
(G_TYPE_INSTANCE_GET_PRIVATE ((loop), PINOS_TYPE_MAIN_LOOP, PinosMainLoopPrivate))
#define DATAS_SIZE (4096 * 8)
typedef struct {
size_t item_size;
SpaPollInvokeFunc func;
uint32_t seq;
size_t size;
void *data;
void *user_data;
} InvokeItem;
typedef struct _WorkItem WorkItem;
struct _WorkItem {
gulong id;
gpointer obj;
uint32_t seq;
SpaResult res;
PinosDeferFunc func;
gpointer *data;
GDestroyNotify notify;
WorkItem *next;
};
struct _PinosMainLoopPrivate
{
gulong counter;
GQueue work;
SpaRingbuffer buffer;
uint8_t buffer_data[DATAS_SIZE];
SpaPollFd fds[1];
SpaPollItem wakeup;
SpaQueue work;
WorkItem *free_list;
gulong work_id;
};
@ -115,13 +152,94 @@ do_remove_item (SpaPoll *poll,
return SPA_RESULT_OK;
}
static int
main_loop_dispatch (SpaPollNotifyData *data)
{
PinosMainLoop *this = data->user_data;
PinosMainLoopPrivate *priv = this->priv;
SpaPoll *p = &this->poll;
uint64_t u;
size_t offset;
InvokeItem *item;
if (read (priv->fds[0].fd, &u, sizeof(uint64_t)) != sizeof(uint64_t))
g_warning ("main-loop %p: failed to read fd", strerror (errno));
while (spa_ringbuffer_get_read_offset (&priv->buffer, &offset) > 0) {
item = SPA_MEMBER (priv->buffer_data, offset, InvokeItem);
item->func (p, item->seq, item->size, item->data, item->user_data);
spa_ringbuffer_read_advance (&priv->buffer, item->item_size);
}
return 0;
}
static SpaResult
do_invoke (SpaPoll *poll,
SpaPollInvokeFunc func,
uint32_t seq,
size_t size,
void *data,
void *user_data)
{
PinosMainLoop *this = SPA_CONTAINER_OF (poll, PinosMainLoop, poll);
PinosMainLoopPrivate *priv = this->priv;
SpaRingbufferArea areas[2];
InvokeItem *item;
uint64_t u = 1;
spa_ringbuffer_get_write_areas (&priv->buffer, areas);
if (areas[0].len < sizeof (InvokeItem)) {
g_warning ("queue full");
return SPA_RESULT_ERROR;
}
item = SPA_MEMBER (priv->buffer_data, areas[0].offset, InvokeItem);
item->seq = seq;
item->func = func;
item->user_data = user_data;
item->size = size;
if (areas[0].len > sizeof (InvokeItem) + size) {
item->data = SPA_MEMBER (item, sizeof (InvokeItem), void);
item->item_size = sizeof (InvokeItem) + size;
if (areas[0].len < sizeof (InvokeItem) + item->item_size)
item->item_size = areas[0].len;
} else {
item->data = SPA_MEMBER (priv->buffer_data, areas[1].offset, void);
item->item_size = areas[0].len + 1 + size;
}
memcpy (item->data, data, size);
spa_ringbuffer_write_advance (&priv->buffer, item->item_size);
if (write (priv->fds[0].fd, &u, sizeof(uint64_t)) != sizeof(uint64_t))
g_warning ("data-loop %p: failed to write fd", strerror (errno));
return SPA_RESULT_RETURN_ASYNC (seq);
}
static void
pinos_main_loop_constructed (GObject * obj)
{
PinosMainLoop *this = PINOS_MAIN_LOOP (obj);
PinosMainLoopPrivate *priv = this->priv;
g_debug ("main-loop %p: constructed", this);
priv->fds[0].fd = eventfd (0, 0);
priv->fds[0].events = POLLIN | POLLPRI | POLLERR;
priv->fds[0].revents = 0;
priv->wakeup.id = SPA_ID_INVALID;
priv->wakeup.enabled = false;
priv->wakeup.fds = priv->fds;
priv->wakeup.n_fds = 1;
priv->wakeup.idle_cb = NULL;
priv->wakeup.before_cb = NULL;
priv->wakeup.after_cb = main_loop_dispatch;
priv->wakeup.user_data = this;
do_add_item (&this->poll, &priv->wakeup);
G_OBJECT_CLASS (pinos_main_loop_parent_class)->constructed (obj);
}
@ -169,8 +287,10 @@ pinos_main_loop_init (PinosMainLoop * this)
this->poll.add_item = do_add_item;
this->poll.update_item = do_update_item;
this->poll.remove_item = do_remove_item;
this->poll.invoke = do_invoke;
g_queue_init (&priv->work);
SPA_QUEUE_INIT (&priv->work);
spa_ringbuffer_init (&priv->buffer, DATAS_SIZE);
}
/**
@ -186,42 +306,36 @@ pinos_main_loop_new (void)
return g_object_new (PINOS_TYPE_MAIN_LOOP, NULL);
}
typedef struct {
gulong id;
gpointer obj;
uint32_t seq;
SpaResult res;
PinosDeferFunc func;
gpointer *data;
GDestroyNotify notify;
} WorkItem;
static gboolean
process_work_queue (PinosMainLoop *this)
{
PinosMainLoopPrivate *priv = this->priv;
GList *walk, *next;
WorkItem *prev, *item, *next;
for (walk = priv->work.head; walk; walk = next) {
WorkItem *item = walk->data;
priv->work_id = 0;
next = g_list_next (walk);
for (item = priv->work.head, prev = NULL; item; prev = item, item = next) {
next = item->next;
g_debug ("main-loop %p: peek work queue item %p seq %d", this, item, item ? item->seq : -1);
g_debug ("main-loop %p: peek work queue item %p seq %d, prev %p next %p", this, item->obj, item->seq, prev, next);
if (item->seq != SPA_ID_INVALID)
continue;
g_debug ("main-loop %p: process work item %p", this, item);
g_debug ("main-loop %p: process work item %p", this, item->obj);
if (priv->work.tail == item)
priv->work.tail = prev;
if (prev == NULL)
priv->work.head = next;
else
prev->next = next;
if (item->func)
item->func (item->data, item->res, item->id);
item->func (item->obj, item->data, item->res, item->id);
if (item->notify)
item->notify (item->data);
g_queue_delete_link (&priv->work, walk);
g_slice_free (WorkItem, item);
item = prev;
}
priv->work_id = 0;
return FALSE;
}
@ -246,6 +360,7 @@ pinos_main_loop_defer (PinosMainLoop *loop,
item->func = func;
item->data = data;
item->notify = notify;
item->next = NULL;
if (SPA_RESULT_IS_ASYNC (res)) {
item->seq = SPA_RESULT_ASYNC_SEQ (res);
@ -257,7 +372,7 @@ pinos_main_loop_defer (PinosMainLoop *loop,
have_work = TRUE;
g_debug ("main-loop %p: defer object %p", loop, obj);
}
g_queue_push_tail (&priv->work, item);
SPA_QUEUE_PUSH_TAIL (&priv->work, WorkItem, next, item);
if (priv->work_id == 0 && have_work)
priv->work_id = g_idle_add ((GSourceFunc) process_work_queue, loop);
@ -270,19 +385,18 @@ pinos_main_loop_defer_cancel (PinosMainLoop *loop,
gpointer obj,
gulong id)
{
GList *walk;
PinosMainLoopPrivate *priv;
gboolean have_work = FALSE;
WorkItem *item;
g_return_if_fail (PINOS_IS_MAIN_LOOP (loop));
priv = loop->priv;
for (walk = priv->work.head; walk; walk = g_list_next (walk)) {
WorkItem *i = walk->data;
if ((id == 0 || i->id == id) && (obj == NULL || i->obj == obj)) {
g_debug ("main-loop %p: cancel defer %d for object %p", loop, i->seq, i->obj);
i->seq = SPA_ID_INVALID;
i->func = NULL;
for (item = priv->work.head; item; item = item->next) {
if ((id == 0 || item->id == id) && (obj == NULL || item->obj == obj)) {
g_debug ("main-loop %p: cancel defer %d for object %p", loop, item->seq, item->obj);
item->seq = SPA_ID_INVALID;
item->func = NULL;
have_work = TRUE;
}
}
@ -296,7 +410,7 @@ pinos_main_loop_defer_complete (PinosMainLoop *loop,
uint32_t seq,
SpaResult res)
{
GList *walk;
WorkItem *item;
PinosMainLoopPrivate *priv;
gboolean have_work = FALSE;
@ -305,16 +419,17 @@ pinos_main_loop_defer_complete (PinosMainLoop *loop,
g_debug ("main-loop %p: async complete %d %d for object %p", loop, seq, res, obj);
for (walk = priv->work.head; walk; walk = g_list_next (walk)) {
WorkItem *i = walk->data;
if (i->obj == obj && i->seq == seq) {
for (item = priv->work.head; item; item = item->next) {
if (item->obj == obj && item->seq == seq) {
g_debug ("main-loop %p: found defered %d for object %p", loop, seq, obj);
i->seq = SPA_ID_INVALID;
i->res = res;
item->seq = SPA_ID_INVALID;
item->res = res;
have_work = TRUE;
}
}
if (!have_work)
g_debug ("main-loop %p: no defered %d found for object %p", loop, seq, obj);
if (priv->work_id == 0 && have_work)
priv->work_id = g_idle_add ((GSourceFunc) process_work_queue, loop);
}