1 /* sane - Scanner Access Now Easy. 2 3 Copyright (C) 2002 Sergey Vlasov <vsu@altlinux.ru> 4 5 This file is part of the SANE package. 6 7 This program is free software; you can redistribute it and/or 8 modify it under the terms of the GNU General Public License as 9 published by the Free Software Foundation; either version 2 of the 10 License, or (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, but 13 WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <https://www.gnu.org/licenses/>. 19 20 As a special exception, the authors of SANE give permission for 21 additional uses of the libraries contained in this release of SANE. 22 23 The exception is that, if you link a SANE library with other files 24 to produce an executable, this does not by itself cause the 25 resulting executable to be covered by the GNU General Public 26 License. Your use of that executable is in no way restricted on 27 account of linking the SANE library code into it. 28 29 This exception does not, however, invalidate any other reasons why 30 the executable file might be covered by the GNU General Public 31 License. 32 33 If you submit changes to SANE to the maintainers to be included in 34 a subsequent release, you agree by submitting the changes that 35 those changes may be distributed with this exception intact. 36 37 If you write modifications of your own for SANE, it is your choice 38 whether to permit this exception to apply to your modifications. 39 If you do not wish that, delete this exception notice. 40 */ 41 42 #ifndef GT68XX_SHM_CHANNEL_H 43 #define GT68XX_SHM_CHANNEL_H 44 45 /** @file 46 * @brief Shared memory channel support. 47 */ 48 49 #include "../include/sane/sane.h" 50 51 typedef struct Shm_Channel Shm_Channel; 52 53 static SANE_Status 54 shm_channel_new (SANE_Int buf_size, 55 SANE_Int buf_count, Shm_Channel ** shm_channel_return); 56 57 static SANE_Status shm_channel_free (Shm_Channel * shm_channel); 58 59 60 static SANE_Status shm_channel_writer_init (Shm_Channel * shm_channel); 61 62 static SANE_Status 63 shm_channel_writer_get_buffer (Shm_Channel * shm_channel, 64 SANE_Int * buffer_id_return, 65 SANE_Byte ** buffer_addr_return); 66 67 static SANE_Status 68 shm_channel_writer_put_buffer (Shm_Channel * shm_channel, 69 SANE_Int buffer_id, SANE_Int buffer_bytes); 70 71 static SANE_Status shm_channel_writer_close (Shm_Channel * shm_channel); 72 73 74 static SANE_Status shm_channel_reader_init (Shm_Channel * shm_channel); 75 76 #if 0 77 static SANE_Status 78 shm_channel_reader_set_io_mode (Shm_Channel * shm_channel, 79 SANE_Bool non_blocking); 80 81 static SANE_Status 82 shm_channel_reader_get_select_fd (Shm_Channel * shm_channel, 83 SANE_Int * fd_return); 84 85 #endif 86 87 static SANE_Status shm_channel_reader_start (Shm_Channel * shm_channel); 88 89 static SANE_Status 90 shm_channel_reader_get_buffer (Shm_Channel * shm_channel, 91 SANE_Int * buffer_id_return, 92 SANE_Byte ** buffer_addr_return, 93 SANE_Int * buffer_bytes_return); 94 95 static SANE_Status 96 shm_channel_reader_put_buffer (Shm_Channel * shm_channel, SANE_Int buffer_id); 97 98 #if 0 99 static SANE_Status shm_channel_reader_close (Shm_Channel * shm_channel); 100 #endif 101 102 #endif /* not GT68XX_SHM_CHANNEL_H */ 103 104 /* vim: set sw=2 cino=>2se-1sn-1s{s^-1st0(0u0 smarttab expandtab: */ 105