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helpers: add async helper to list processes

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This commit is contained in:
Christian Hergert
2019-05-17 19:46:10 -07:00
parent d0be5b50c2
commit e54b17a4be
2 changed files with 97 additions and 14 deletions
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76
src/helpers.c
View File

@ -328,3 +328,79 @@ helpers_can_see_pids (void)
return TRUE;
}
static void
helpers_list_processes_worker (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
g_autofree gint32 *processes = NULL;
gsize n_processes;
g_assert (G_IS_TASK (task));
g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
if (helpers_list_processes (&processes, &n_processes))
{
GArray *ar;
ar = g_array_new (FALSE, FALSE, sizeof (gint32));
g_array_append_vals (ar, processes, n_processes);
g_task_return_pointer (task,
g_steal_pointer (&ar),
(GDestroyNotify) g_array_unref);
return;
}
g_task_return_new_error (task,
G_IO_ERROR,
G_IO_ERROR_FAILED,
"Failed to list processes");
}
void
helpers_list_processes_async (GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
task = g_task_new (NULL, cancellable, callback, user_data);
g_task_set_source_tag (task, helpers_list_processes_async);
g_task_run_in_thread (task, helpers_list_processes_worker);
}
gboolean
helpers_list_processes_finish (GAsyncResult *result,
gint32 **processes,
gsize *n_processes,
GError **error)
{
g_autoptr(GArray) ret = NULL;
g_return_val_if_fail (G_IS_TASK (result), FALSE);
if ((ret = g_task_propagate_pointer (G_TASK (result), error)))
{
if (n_processes)
*n_processes = ret->len;
if (processes)
*processes = (gint32 *)(gpointer)g_array_free (ret, FALSE);
return TRUE;
}
else
{
if (processes)
*processes = NULL;
if (n_processes)
*n_processes = 0;
}
return FALSE;
}

35
src/helpers.h
View File

@ -27,19 +27,26 @@
G_BEGIN_DECLS
gboolean helpers_can_see_pids (void);
gboolean helpers_list_processes (gint32 **processes,
gsize *n_processes);
gboolean helpers_perf_event_open (GVariant *options,
gint32 pid,
gint32 cpu,
gint group_fd,
guint64 flags,
gint *out_fd);
gboolean helpers_get_proc_file (const gchar *path,
gchar **contents,
gsize *len);
gboolean helpers_get_proc_fd (const gchar *path,
gint *out_fd);
gboolean helpers_can_see_pids (void);
gboolean helpers_list_processes (gint32 **processes,
gsize *n_processes);
void helpers_list_processes_async (GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
gboolean helpers_list_processes_finish (GAsyncResult *result,
gint32 **processes,
gsize *n_processes,
GError **error);
gboolean helpers_perf_event_open (GVariant *options,
gint32 pid,
gint32 cpu,
gint group_fd,
guint64 flags,
gint *out_fd);
gboolean helpers_get_proc_file (const gchar *path,
gchar **contents,
gsize *len);
gboolean helpers_get_proc_fd (const gchar *path,
gint *out_fd);
G_END_DECLS