| GIO Reference Manual | ||||
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#include <gio/gio.h>
GIOSchedulerJob;
gboolean (*GIOSchedulerJobFunc) (GIOSchedulerJob *job,
GCancellable *cancellable,
gpointer user_data);
void g_io_scheduler_push_job (GIOSchedulerJobFunc job_func,
gpointer user_data,
GDestroyNotify notify,
gint io_priority,
GCancellable *cancellable);
void g_io_scheduler_cancel_all_jobs (void);
gboolean g_io_scheduler_job_send_to_mainloop (GIOSchedulerJob *job,
GSourceFunc func,
gpointer user_data,
GDestroyNotify notify);
void g_io_scheduler_job_send_to_mainloop_async
(GIOSchedulerJob *job,
GSourceFunc func,
gpointer user_data,
GDestroyNotify notify);
Schedules asynchronous I/O operations. GIOScheduler integrates into the main event loop (GMainLoop) and uses threads.
Each I/O operation has a priority, and the scheduler uses the priorities
to determine the order in which operations are executed. They are
not used to determine system-wide I/O scheduling.
Priorities are integers, with lower numbers indicating higher priority.
It is recommended to choose priorities between G_PRIORITY_LOW and
G_PRIORITY_HIGH, with G_PRIORITY_DEFAULT as a default.
typedef struct _GIOSchedulerJob GIOSchedulerJob;
Opaque class for defining and scheduling IO jobs.
gboolean (*GIOSchedulerJobFunc) (GIOSchedulerJob *job,GCancellable *cancellable,gpointer user_data);
I/O Job function.
Long-running jobs should periodically check the cancellable
to see if they have been cancelled.
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a GIOSchedulerJob. |
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optional GCancellable object, NULL to ignore. |
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the data to pass to callback function |
Returns : |
TRUE if this function should be called again to
complete the job, FALSE if the job is complete (or cancelled) |
void g_io_scheduler_push_job (GIOSchedulerJobFunc job_func,gpointer user_data,GDestroyNotify notify,gint io_priority,GCancellable *cancellable);
Schedules the I/O job to run in another thread.
notify will be called on user_data after job_func has returned,
regardless whether the job was cancelled or has run to completion.
If cancellable is not NULL, it can be used to cancel the I/O job
by calling g_cancellable_cancel() or by calling
g_io_scheduler_cancel_all_jobs().
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a GIOSchedulerJobFunc. |
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data to pass to job_func
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a GDestroyNotify for user_data, or NULL. [allow-none]
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the I/O priority of the request. |
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optional GCancellable object, NULL to ignore. |
void g_io_scheduler_cancel_all_jobs (void);
Cancels all cancellable I/O jobs.
A job is cancellable if a GCancellable was passed into
g_io_scheduler_push_job().
gboolean g_io_scheduler_job_send_to_mainloop (GIOSchedulerJob *job,GSourceFunc func,gpointer user_data,GDestroyNotify notify);
Used from an I/O job to send a callback to be run in the thread that the job was started from, waiting for the result (and thus blocking the I/O job).
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a GIOSchedulerJob |
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a GSourceFunc callback that will be called in the original thread |
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data to pass to func
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a GDestroyNotify for user_data, or NULL. [allow-none]
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Returns : |
The return value of func
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void g_io_scheduler_job_send_to_mainloop_async (GIOSchedulerJob *job,GSourceFunc func,gpointer user_data,GDestroyNotify notify);
Used from an I/O job to send a callback to be run asynchronously in the thread that the job was started from. The callback will be run when the main loop is available, but at that time the I/O job might have finished. The return value from the callback is ignored.
Note that if you are passing the user_data from g_io_scheduler_push_job()
on to this function you have to ensure that it is not freed before
func is called, either by passing NULL as notify to
g_io_scheduler_push_job() or by using refcounting for user_data.
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a GIOSchedulerJob |
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a GSourceFunc callback that will be called in the original thread |
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data to pass to func
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a GDestroyNotify for user_data, or NULL. [allow-none]
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