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Diffstat (limited to 'trunk/daemon/gvfsjobseekread.c')
| -rw-r--r-- | trunk/daemon/gvfsjobseekread.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/trunk/daemon/gvfsjobseekread.c b/trunk/daemon/gvfsjobseekread.c new file mode 100644 index 00000000..e886a13d --- /dev/null +++ b/trunk/daemon/gvfsjobseekread.c @@ -0,0 +1,151 @@ +/* GIO - GLib Input, Output and Streaming Library + * + * Copyright (C) 2006-2007 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General + * Public License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place, Suite 330, + * Boston, MA 02111-1307, USA. + * + * Author: Alexander Larsson <alexl@redhat.com> + */ + +#include <config.h> + +#include <unistd.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/un.h> + +#include <glib.h> +#include <glib/gi18n.h> +#include "gvfsreadchannel.h" +#include "gvfsjobseekread.h" +#include "gvfsdaemonutils.h" + +G_DEFINE_TYPE (GVfsJobSeekRead, g_vfs_job_seek_read, G_VFS_TYPE_JOB) + +static void run (GVfsJob *job); +static gboolean try (GVfsJob *job); +static void send_reply (GVfsJob *job); + +static void +g_vfs_job_seek_read_finalize (GObject *object) +{ + GVfsJobSeekRead *job; + + job = G_VFS_JOB_SEEK_READ (object); + g_object_unref (job->channel); + + if (G_OBJECT_CLASS (g_vfs_job_seek_read_parent_class)->finalize) + (*G_OBJECT_CLASS (g_vfs_job_seek_read_parent_class)->finalize) (object); +} + +static void +g_vfs_job_seek_read_class_init (GVfsJobSeekReadClass *klass) +{ + GObjectClass *gobject_class = G_OBJECT_CLASS (klass); + GVfsJobClass *job_class = G_VFS_JOB_CLASS (klass); + + gobject_class->finalize = g_vfs_job_seek_read_finalize; + + job_class->run = run; + job_class->try = try; + job_class->send_reply = send_reply; +} + +static void +g_vfs_job_seek_read_init (GVfsJobSeekRead *job) +{ +} + +GVfsJob * +g_vfs_job_seek_read_new (GVfsReadChannel *channel, + GVfsBackendHandle handle, + GSeekType seek_type, + goffset offset, + GVfsBackend *backend) +{ + GVfsJobSeekRead *job; + + job = g_object_new (G_VFS_TYPE_JOB_SEEK_READ, + NULL); + + job->backend = backend; + job->channel = g_object_ref (channel); + job->handle = handle; + job->requested_offset = offset; + job->seek_type = seek_type; + + return G_VFS_JOB (job); +} + +/* Might be called on an i/o thread */ +static void +send_reply (GVfsJob *job) +{ + GVfsJobSeekRead *op_job = G_VFS_JOB_SEEK_READ (job); + + g_debug ("job_seek_read send reply, pos %d\n", (int)op_job->final_offset); + + if (job->failed) + g_vfs_channel_send_error (G_VFS_CHANNEL (op_job->channel), job->error); + else + { + g_vfs_read_channel_send_seek_offset (op_job->channel, + op_job->final_offset); + } +} + +static void +run (GVfsJob *job) +{ + GVfsJobSeekRead *op_job = G_VFS_JOB_SEEK_READ (job); + GVfsBackendClass *class = G_VFS_BACKEND_GET_CLASS (op_job->backend); + + if (class->seek_on_read == NULL) + { + g_vfs_job_failed (job, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED, + _("Operation not supported by backend")); + return; + } + + class->seek_on_read (op_job->backend, + op_job, + op_job->handle, + op_job->requested_offset, + op_job->seek_type); +} + +static gboolean +try (GVfsJob *job) +{ + GVfsJobSeekRead *op_job = G_VFS_JOB_SEEK_READ (job); + GVfsBackendClass *class = G_VFS_BACKEND_GET_CLASS (op_job->backend); + + if (class->try_seek_on_read == NULL) + return FALSE; + + return class->try_seek_on_read (op_job->backend, + op_job, + op_job->handle, + op_job->requested_offset, + op_job->seek_type); +} + +void +g_vfs_job_seek_read_set_offset (GVfsJobSeekRead *job, + goffset offset) +{ + job->final_offset = offset; +} |