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1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <glib.h> | |
22 | #include "libsigrok.h" | |
23 | #include "libsigrok-internal.h" | |
24 | ||
25 | /** | |
26 | * Standard sr_driver_init() API helper. | |
27 | * | |
28 | * This function can be used to simplify most driver's hw_init() API callback. | |
29 | * | |
30 | * It creates a new 'struct drv_context' (drvc), assigns sr_ctx to it, and | |
31 | * then 'drvc' is assigned to the 'struct sr_dev_driver' (di) that is passed. | |
32 | * | |
33 | * @param sr_ctx The libsigrok context to assign. | |
34 | * @param di The driver instance to use. | |
35 | * @param prefix A driver-specific prefix string used for log messages. | |
36 | * | |
37 | * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or | |
38 | * SR_ERR_MALLOC upon memory allocation errors. | |
39 | */ | |
40 | SR_PRIV int std_hw_init(struct sr_context *sr_ctx, struct sr_dev_driver *di, | |
41 | const char *prefix) | |
42 | { | |
43 | struct drv_context *drvc; | |
44 | ||
45 | if (!di) { | |
46 | sr_err("%sInvalid driver, cannot initialize.", prefix); | |
47 | return SR_ERR_ARG; | |
48 | } | |
49 | ||
50 | if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) { | |
51 | sr_err("%sDriver context malloc failed.", prefix); | |
52 | return SR_ERR_MALLOC; | |
53 | } | |
54 | ||
55 | drvc->sr_ctx = sr_ctx; | |
56 | di->priv = drvc; | |
57 | ||
58 | return SR_OK; | |
59 | } |