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#include "jobqueue.h"
typedef struct Job Job;
struct Job
{
JobQueue * queue;
ExecutorJob job;
gpointer data;
};
struct JobQueue
{
Executor * executor;
GQueue * jobs;
GMutex * mutex;
gboolean in_executor;;
int ref_count;
};
static Job *
job_new (JobQueue * queue,
ExecutorJob func,
gpointer data)
{
Job *job = g_new0 (Job, 1);
job->job = func;
job->queue = queue;
job->data = data;
return job;
}
static void
job_queue_lock (JobQueue *queue)
{
g_mutex_lock (queue->mutex);
}
static void
job_queue_unlock (JobQueue *queue)
{
g_mutex_unlock (queue->mutex);
}
static void
delete_queue (JobQueue *queue)
{
g_assert (queue->ref_count == 0);
g_queue_free (queue->jobs);
g_mutex_free (queue->mutex);
g_free (queue);
}
JobQueue *
job_queue_new (Executor *executor)
{
JobQueue *queue = g_new0 (JobQueue, 1);
queue->executor = executor;
queue->mutex = g_mutex_new ();
queue->in_executor = FALSE;
queue->ref_count = 1;
queue->jobs = g_queue_new ();
return queue;
}
static void
run_queue (gpointer data)
{
JobQueue *queue = data;
gboolean do_free = FALSE;
job_queue_lock (queue);
g_assert (queue->in_executor == TRUE);
while (!g_queue_is_empty (queue->jobs))
{
Job *job = g_queue_pop_head (queue->jobs);
job_queue_unlock (queue);
job->job (job->data);
g_free (job);
job_queue_lock (queue);
}
queue->ref_count--;
queue->in_executor = FALSE;
if (queue->ref_count == 0)
do_free = TRUE;
job_queue_unlock (queue);
if (do_free)
delete_queue (queue);
}
gpointer
job_queue_add (JobQueue *queue,
ExecutorJob func,
gpointer data)
{
Job *job;
job_queue_lock (queue);
job = job_new (queue, func, data);
g_queue_push_tail (queue->jobs, job);
if (!queue->in_executor)
{
queue->in_executor = TRUE;
queue->ref_count++;
executor_add_job (queue->executor, run_queue, queue);
}
job_queue_unlock (queue);
return job;
}
void
job_queue_remove (JobQueue *queue,
gpointer job_id)
{
Job *job = job_id;
GList *link;
job_queue_lock (job->queue);
link = g_queue_find (queue->jobs, job);
if (link)
{
g_queue_delete_link (queue->jobs, link);
g_free (job);
}
job_queue_unlock (job->queue);
}
void
job_queue_free (JobQueue *queue)
{
gboolean do_free = FALSE;
job_queue_lock (queue);
if (queue->in_executor)
{
g_warning ("Trying to free a running queue");
job_queue_unlock (queue);
return;
}
while (!g_queue_is_empty (queue->jobs))
{
Job *job = g_queue_pop_head (queue->jobs);
g_free (job);
}
g_queue_free (queue->jobs);
queue->ref_count--;
if (queue->ref_count == 0)
do_free = TRUE;
job_queue_unlock (queue);
if (do_free)
delete_queue (queue);
}
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