1 files changed, 106 insertions, 0 deletions
diff --git a/backend/gt68xx_shm_channel.h b/backend/gt68xx_shm_channel.h
new file mode 100644
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+++ b/backend/gt68xx_shm_channel.h
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+/* sane - Scanner Access Now Easy.
+
+   Copyright (C) 2002 Sergey Vlasov <vsu@altlinux.ru>
+   
+   This file is part of the SANE package.
+   
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+   
+   This program 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
+   General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA.
+   
+   As a special exception, the authors of SANE give permission for
+   additional uses of the libraries contained in this release of SANE.
+   
+   The exception is that, if you link a SANE library with other files
+   to produce an executable, this does not by itself cause the
+   resulting executable to be covered by the GNU General Public
+   License.  Your use of that executable is in no way restricted on
+   account of linking the SANE library code into it.
+   
+   This exception does not, however, invalidate any other reasons why
+   the executable file might be covered by the GNU General Public
+   License.
+   
+   If you submit changes to SANE to the maintainers to be included in
+   a subsequent release, you agree by submitting the changes that
+   those changes may be distributed with this exception intact.
+   
+   If you write modifications of your own for SANE, it is your choice
+   whether to permit this exception to apply to your modifications.
+   If you do not wish that, delete this exception notice. 
+*/
+
+#ifndef GT68XX_SHM_CHANNEL_H
+#define GT68XX_SHM_CHANNEL_H
+
+/** @file
+ * @brief Shared memory channel support.
+ */
+
+#include "../include/sane/sane.h"
+
+typedef struct Shm_Channel Shm_Channel;
+
+static SANE_Status
+shm_channel_new (SANE_Int buf_size,
+		 SANE_Int buf_count, Shm_Channel ** shm_channel_return);
+
+static SANE_Status shm_channel_free (Shm_Channel * shm_channel);
+
+
+static SANE_Status shm_channel_writer_init (Shm_Channel * shm_channel);
+
+static SANE_Status
+shm_channel_writer_get_buffer (Shm_Channel * shm_channel,
+			       SANE_Int * buffer_id_return,
+			       SANE_Byte ** buffer_addr_return);
+
+static SANE_Status
+shm_channel_writer_put_buffer (Shm_Channel * shm_channel,
+			       SANE_Int buffer_id, SANE_Int buffer_bytes);
+
+static SANE_Status shm_channel_writer_close (Shm_Channel * shm_channel);
+
+
+static SANE_Status shm_channel_reader_init (Shm_Channel * shm_channel);
+
+#if 0
+static SANE_Status
+shm_channel_reader_set_io_mode (Shm_Channel * shm_channel,
+				SANE_Bool non_blocking);
+
+static SANE_Status
+shm_channel_reader_get_select_fd (Shm_Channel * shm_channel,
+				  SANE_Int * fd_return);
+
+#endif
+
+static SANE_Status shm_channel_reader_start (Shm_Channel * shm_channel);
+
+static SANE_Status
+shm_channel_reader_get_buffer (Shm_Channel * shm_channel,
+			       SANE_Int * buffer_id_return,
+			       SANE_Byte ** buffer_addr_return,
+			       SANE_Int * buffer_bytes_return);
+
+static SANE_Status
+shm_channel_reader_put_buffer (Shm_Channel * shm_channel, SANE_Int buffer_id);
+
+#if 0
+static SANE_Status shm_channel_reader_close (Shm_Channel * shm_channel);
+#endif
+
+#endif /* not GT68XX_SHM_CHANNEL_H */
+
+/* vim: set sw=2 cino=>2se-1sn-1s{s^-1st0(0u0 smarttab expandtab: */