mirror of https://gitee.com/openkylin/gvfs.git
158 lines
3.8 KiB
C
158 lines
3.8 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2006-2007 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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* Author: Alexander Larsson <alexl@redhat.com>
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*/
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#include <config.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <glib.h>
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#include <glib/gi18n.h>
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#include "gvfsreadchannel.h"
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#include "gvfsjobread.h"
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#include "gvfsdaemonutils.h"
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G_DEFINE_TYPE (GVfsJobRead, g_vfs_job_read, G_VFS_TYPE_JOB)
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static void run (GVfsJob *job);
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static gboolean try (GVfsJob *job);
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static void send_reply (GVfsJob *job);
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static void
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g_vfs_job_read_finalize (GObject *object)
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{
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GVfsJobRead *job;
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job = G_VFS_JOB_READ (object);
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g_object_unref (job->channel);
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g_free (job->buffer);
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if (G_OBJECT_CLASS (g_vfs_job_read_parent_class)->finalize)
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(*G_OBJECT_CLASS (g_vfs_job_read_parent_class)->finalize) (object);
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}
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static void
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g_vfs_job_read_class_init (GVfsJobReadClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GVfsJobClass *job_class = G_VFS_JOB_CLASS (klass);
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gobject_class->finalize = g_vfs_job_read_finalize;
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job_class->run = run;
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job_class->try = try;
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job_class->send_reply = send_reply;
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}
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static void
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g_vfs_job_read_init (GVfsJobRead *job)
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{
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}
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GVfsJob *
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g_vfs_job_read_new (GVfsReadChannel *channel,
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GVfsBackendHandle handle,
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gsize bytes_requested,
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GVfsBackend *backend)
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{
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GVfsJobRead *job;
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job = g_object_new (G_VFS_TYPE_JOB_READ,
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NULL);
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job->backend = backend;
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job->channel = g_object_ref (channel);
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job->handle = handle;
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job->buffer = g_malloc (bytes_requested);
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job->bytes_requested = bytes_requested;
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return G_VFS_JOB (job);
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}
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/* Might be called on an i/o thread */
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static void
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send_reply (GVfsJob *job)
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{
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GVfsJobRead *op_job = G_VFS_JOB_READ (job);
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g_debug ("send_reply(%p), bytes=%"G_GSIZE_FORMAT", failed=%d (%s)\n",
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job, op_job->data_count,
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job->failed, job->failed ? job->error->message : "");
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if (job->failed)
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g_vfs_channel_send_error (G_VFS_CHANNEL (op_job->channel), job->error);
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else
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{
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g_vfs_read_channel_send_data (op_job->channel,
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op_job->buffer,
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op_job->data_count);
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}
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}
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static void
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run (GVfsJob *job)
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{
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GVfsJobRead *op_job = G_VFS_JOB_READ (job);
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GVfsBackendClass *class = G_VFS_BACKEND_GET_CLASS (op_job->backend);
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if (class->read == NULL)
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{
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g_vfs_job_failed (job, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
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_("Operation not supported"));
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return;
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}
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class->read (op_job->backend,
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op_job,
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op_job->handle,
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op_job->buffer,
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op_job->bytes_requested);
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}
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static gboolean
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try (GVfsJob *job)
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{
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GVfsJobRead *op_job = G_VFS_JOB_READ (job);
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GVfsBackendClass *class = G_VFS_BACKEND_GET_CLASS (op_job->backend);
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if (class->try_read == NULL)
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return FALSE;
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return class->try_read (op_job->backend,
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op_job,
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op_job->handle,
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op_job->buffer,
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op_job->bytes_requested);
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}
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/* Takes ownership */
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void
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g_vfs_job_read_set_size (GVfsJobRead *job,
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gsize data_size)
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{
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job->data_count = data_size;
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}
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