2 * This file is part of the sigrok project.
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
5 * Copyright (C) 2012 Peter Stuge <peter@stuge.se>
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.
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.
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/>.
22 #include "libsigrok.h"
23 #include "libsigrok-internal.h"
26 * Initialize libsigrok.
28 * This function must be called before any other libsigrok function.
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.
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
39 SR_API int sr_init(struct sr_context **ctx)
42 struct sr_context *context;
45 sr_err("%s(): libsigrok context was NULL.", __func__);
49 /* + 1 to handle when struct sr_context has no members. */
50 context = g_try_malloc0(sizeof(struct sr_context) + 1);
57 #ifdef HAVE_LIBUSB_1_0
58 ret = libusb_init(&context->libusb_ctx);
59 if (LIBUSB_SUCCESS == ret) {
60 sr_err("libusb_init() returned %s.\n", libusb_error_name(ret));
75 * @param ctx Pointer to a libsigrok context struct. Must not be NULL.
77 * @return SR_OK upon success, a (negative) error code otherwise.
79 SR_API int sr_exit(struct sr_context *ctx)
82 sr_err("%s(): libsigrok context was NULL.", __func__);
88 #ifdef HAVE_LIBUSB_1_0
89 libusb_exit(ctx->libusb_ctx);