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Commit | Line | Data |
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a1bb33af UH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
c73d2ea4 | 4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> |
b8072700 | 5 | * Copyright (C) 2012 Peter Stuge <peter@stuge.se> |
a1bb33af UH |
6 | * |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU 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 <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <glib.h> | |
45c59c8b BV |
22 | #include "libsigrok.h" |
23 | #include "libsigrok-internal.h" | |
a1bb33af | 24 | |
cd009d55 UH |
25 | /** |
26 | * Initialize libsigrok. | |
27 | * | |
c46762a2 UH |
28 | * This function must be called before any other libsigrok function. |
29 | * | |
30 | * @param ctx Pointer to a libsigrok context struct pointer. Must not be NULL. | |
31 | * This will be a pointer to a newly allocated libsigrok context | |
32 | * object upon success, and is undefined upon errors. | |
33 | * | |
34 | * @return SR_OK upon success, a (negative) error code otherwise. Upon errors | |
35 | * the 'ctx' pointer is undefined and should not be used. Upon success, | |
36 | * the context will be free'd by sr_exit() as part of the libsigrok | |
37 | * shutdown. | |
cd009d55 | 38 | */ |
b8072700 | 39 | SR_API int sr_init(struct sr_context **ctx) |
a1bb33af | 40 | { |
b8072700 PS |
41 | int ret = SR_ERR; |
42 | struct sr_context *context; | |
43 | ||
c46762a2 UH |
44 | if (!ctx) { |
45 | sr_err("%s(): libsigrok context was NULL.", __func__); | |
46 | return SR_ERR; | |
47 | } | |
48 | ||
b8072700 PS |
49 | /* + 1 to handle when struct sr_context has no members. */ |
50 | context = g_try_malloc0(sizeof(struct sr_context) + 1); | |
51 | ||
52 | if (!context) { | |
53 | ret = SR_ERR_MALLOC; | |
54 | goto done; | |
55 | } | |
56 | ||
785b9ff2 PS |
57 | #ifdef HAVE_LIBUSB_1_0 |
58 | ret = libusb_init(&context->libusb_ctx); | |
c46762a2 UH |
59 | if (LIBUSB_SUCCESS == ret) { |
60 | sr_err("libusb_init() returned %s.\n", libusb_error_name(ret)); | |
785b9ff2 PS |
61 | goto done; |
62 | } | |
63 | #endif | |
64 | ||
b8072700 PS |
65 | *ctx = context; |
66 | ret = SR_OK; | |
67 | ||
68 | done: | |
69 | return ret; | |
a1bb33af UH |
70 | } |
71 | ||
cd009d55 UH |
72 | /** |
73 | * Shutdown libsigrok. | |
74 | * | |
c46762a2 UH |
75 | * @param ctx Pointer to a libsigrok context struct. Must not be NULL. |
76 | * | |
cd009d55 UH |
77 | * @return SR_OK upon success, a (negative) error code otherwise. |
78 | */ | |
b8072700 | 79 | SR_API int sr_exit(struct sr_context *ctx) |
a1bb33af | 80 | { |
c46762a2 UH |
81 | if (!ctx) { |
82 | sr_err("%s(): libsigrok context was NULL.", __func__); | |
83 | return SR_ERR; | |
84 | } | |
85 | ||
93a04e3b | 86 | sr_hw_cleanup_all(); |
cd009d55 | 87 | |
785b9ff2 PS |
88 | #ifdef HAVE_LIBUSB_1_0 |
89 | libusb_exit(ctx->libusb_ctx); | |
90 | #endif | |
91 | ||
b8072700 PS |
92 | g_free(ctx); |
93 | ||
cd009d55 | 94 | return SR_OK; |
a1bb33af | 95 | } |