[libsigrok.git] / backend.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
 * Copyright (C) 2012 Peter Stuge <peter@stuge.se>
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#include <glib.h>
#include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
#include "libsigrok.h"
#include "libsigrok-internal.h"

/** @cond PRIVATE */
#define LOG_PREFIX "backend"
/** @endcond */

extern struct sr_session *session;

/**
 * @mainpage libsigrok API
 *
 * @section sec_intro Introduction
 *
 * The <a href="http://sigrok.org">sigrok</a> project aims at creating a
 * portable, cross-platform, Free/Libre/Open-Source signal analysis software
 * suite that supports various device types (such as logic analyzers,
 * oscilloscopes, multimeters, and more).
 *
 * <a href="http://sigrok.org/wiki/Libsigrok">libsigrok</a> is a shared
 * library written in C which provides the basic API for talking to
 * <a href="http://sigrok.org/wiki/Supported_hardware">supported hardware</a>
 * and reading/writing the acquired data into various
 * <a href="http://sigrok.org/wiki/Input_output_formats">input/output
 * file formats</a>.
 *
 * @section sec_api API reference
 *
 * See the "Modules" page for an introduction to various libsigrok
 * related topics and the detailed API documentation of the respective
 * functions.
 *
 * You can also browse the API documentation by file, or review all
 * data structures.
 *
 * @section sec_mailinglists Mailing lists
 *
 * There are two mailing lists for sigrok/libsigrok: <a href="https://lists.sourceforge.net/lists/listinfo/sigrok-devel">sigrok-devel</a> and <a href="https://lists.sourceforge.net/lists/listinfo/sigrok-commits">sigrok-commits</a>.
 *
 * @section sec_irc IRC
 *
 * You can find the sigrok developers in the
 * <a href="irc://chat.freenode.net/sigrok">\#sigrok</a>
 * IRC channel on Freenode.
 *
 * @section sec_website Website
 *
 * <a href="http://sigrok.org/wiki/Libsigrok">sigrok.org/wiki/Libsigrok</a>
 */

/**
 * @file
 *
 * Initializing and shutting down libsigrok.
 */

/**
 * @defgroup grp_init Initialization
 *
 * Initializing and shutting down libsigrok.
 *
 * Before using any of the libsigrok functionality, sr_init() must
 * be called to initialize the library, which will return a struct sr_context
 * when the initialization was successful.
 *
 * When libsigrok functionality is no longer needed, sr_exit() should be
 * called, which will (among other things) free the struct sr_context.
 *
 * Example for a minimal program using libsigrok:
 *
 * @code{.c}
 *   #include <stdio.h>
 *   #include <libsigrok/libsigrok.h>
 *
 *   int main(int argc, char **argv)
 *   {
 *   	int ret;
 *   	struct sr_context *sr_ctx;
 *
 *   	if ((ret = sr_init(&sr_ctx)) != SR_OK) {
 *   		printf("Error initializing libsigrok (%s): %s.\n",
 *   		       sr_strerror_name(ret), sr_strerror(ret));
 *   		return 1;
 *   	}
 *
 *   	// Use libsigrok functions here...
 *
 *   	if ((ret = sr_exit(sr_ctx)) != SR_OK) {
 *   		printf("Error shutting down libsigrok (%s): %s.\n",
 *   		       sr_strerror_name(ret), sr_strerror(ret));
 *   		return 1;
 *   	}
 *
 *   	return 0;
 *   }
 * @endcode
 *
 * @{
 */

/**
 * Sanity-check all libsigrok drivers.
 *
 * @retval SR_OK All drivers are OK
 * @retval SR_ERR One or more drivers have issues.
 */
static int sanity_check_all_drivers(void)
{
	int i, errors, ret = SR_OK;
	struct sr_dev_driver **drivers;
	const char *d;

	sr_spew("Sanity-checking all drivers.");

	drivers = sr_driver_list();
	for (i = 0; drivers[i]; i++) {
		errors = 0;

		d = (drivers[i]->name) ? drivers[i]->name : "NULL";

		if (!drivers[i]->name) {
			sr_err("No name in driver %d ('%s').", i, d);
			errors++;
		}
		if (!drivers[i]->longname) {
			sr_err("No longname in driver %d ('%s').", i, d);
			errors++;
		}
		if (drivers[i]->api_version < 1) {
			sr_err("API version in driver %d ('%s') < 1.", i, d);
			errors++;
		}
		if (!drivers[i]->init) {
			sr_err("No init in driver %d ('%s').", i, d);
			errors++;
		}
		if (!drivers[i]->cleanup) {
			sr_err("No cleanup in driver %d ('%s').", i, d);
			errors++;
		}
		if (!drivers[i]->scan) {
			sr_err("No scan in driver %d ('%s').", i, d);
			errors++;
		}
		if (!drivers[i]->dev_list) {
			sr_err("No dev_list in driver %d ('%s').", i, d);
			errors++;
		}
		/* Note: config_get() is optional. */
		if (!drivers[i]->config_set) {
			sr_err("No config_set in driver %d ('%s').", i, d);
			errors++;
		}
		if (!drivers[i]->config_list) {
			sr_err("No config_list in driver %d ('%s').", i, d);
			errors++;
		}
		if (!drivers[i]->dev_open) {
			sr_err("No dev_open in driver %d ('%s').", i, d);
			errors++;
		}
		if (!drivers[i]->dev_close) {
			sr_err("No dev_close in driver %d ('%s').", i, d);
			errors++;
		}
		if (!drivers[i]->dev_acquisition_start) {
			sr_err("No dev_acquisition_start in driver %d ('%s').",
			       i, d);
			errors++;
		}
		if (!drivers[i]->dev_acquisition_stop) {
			sr_err("No dev_acquisition_stop in driver %d ('%s').",
			       i, d);
			errors++;
		}

		/* Note: 'priv' is allowed to be NULL. */

		if (errors == 0)
			continue;

		ret = SR_ERR;
	}

	return ret;
}

/**
 * Sanity-check all libsigrok input modules.
 *
 * @retval SR_OK All modules are OK
 * @retval SR_ERR One or more modules have issues.
 */
static int sanity_check_all_input_modules(void)
{
	int i, errors, ret = SR_OK;
	struct sr_input_format **inputs;
	const char *d;

	sr_spew("Sanity-checking all input modules.");

	inputs = sr_input_list();
	for (i = 0; inputs[i]; i++) {
		errors = 0;

		d = (inputs[i]->id) ? inputs[i]->id : "NULL";

		if (!inputs[i]->id) {
			sr_err("No ID in module %d ('%s').", i, d);
			errors++;
		}
		if (!inputs[i]->description) {
			sr_err("No description in module %d ('%s').", i, d);
			errors++;
		}
		if (!inputs[i]->format_match) {
			sr_err("No format_match in module %d ('%s').", i, d);
			errors++;
		}
		if (!inputs[i]->init) {
			sr_err("No init in module %d ('%s').", i, d);
			errors++;
		}
		if (!inputs[i]->loadfile) {
			sr_err("No loadfile in module %d ('%s').", i, d);
			errors++;
		}

		if (errors == 0)
			continue;

		ret = SR_ERR;
	}

	return ret;
}

/**
 * Sanity-check all libsigrok output modules.
 *
 * @retval SR_OK All modules are OK
 * @retval SR_ERR One or more modules have issues.
 */
static int sanity_check_all_output_modules(void)
{
	int i, errors, ret = SR_OK;
	struct sr_output_format **outputs;
	const char *d;

	sr_spew("Sanity-checking all output modules.");

	outputs = sr_output_list();
	for (i = 0; outputs[i]; i++) {
		errors = 0;

		d = (outputs[i]->id) ? outputs[i]->id : "NULL";

		if (!outputs[i]->id) {
			sr_err("No ID in module %d ('%s').", i, d);
			errors++;
		}
		if (!outputs[i]->description) {
			sr_err("No description in module '%s'.", d);
			errors++;
		}
		if (!outputs[i]->receive) {
			sr_err("No receive in module '%s'.", d);
			errors++;
		}

		if (errors == 0)
			continue;

		ret = SR_ERR;
	}

	return ret;
}

/**
 * Initialize libsigrok.
 *
 * This function must be called before any other libsigrok function.
 *
 * @param ctx Pointer to a libsigrok context struct pointer. Must not be NULL.
 *            This will be a pointer to a newly allocated libsigrok context
 *            object upon success, and is undefined upon errors.
 *
 * @return SR_OK upon success, a (negative) error code otherwise. Upon errors
 *         the 'ctx' pointer is undefined and should not be used. Upon success,
 *         the context will be free'd by sr_exit() as part of the libsigrok
 *         shutdown.
 *
 * @since 0.2.0
 */
SR_API int sr_init(struct sr_context **ctx)
{
	int ret = SR_ERR;
	struct sr_context *context;

	if (!ctx) {
		sr_err("%s(): libsigrok context was NULL.", __func__);
		return SR_ERR;
	}

	if (sanity_check_all_drivers() < 0) {
		sr_err("Internal driver error(s), aborting.");
		return ret;
	}

	if (sanity_check_all_input_modules() < 0) {
		sr_err("Internal input module error(s), aborting.");
		return ret;
	}

	if (sanity_check_all_output_modules() < 0) {
		sr_err("Internal output module error(s), aborting.");
		return ret;
	}

	/* + 1 to handle when struct sr_context has no members. */
	context = g_try_malloc0(sizeof(struct sr_context) + 1);

	if (!context) {
		ret = SR_ERR_MALLOC;
		goto done;
	}

#ifdef HAVE_LIBUSB_1_0
	ret = libusb_init(&context->libusb_ctx);
	if (LIBUSB_SUCCESS != ret) {
		sr_err("libusb_init() returned %s.", libusb_error_name(ret));
		ret = SR_ERR;
		goto done;
	}
#endif

	*ctx = context;
	context = NULL;
	session = NULL;
	ret = SR_OK;

done:
	if (context)
		g_free(context);
	return ret;
}

/**
 * Shutdown libsigrok.
 *
 * @param ctx Pointer to a libsigrok context struct. Must not be NULL.
 *
 * @retval SR_OK Success
 * @retval other Error code SR_ERR, ...
 *
 * @since 0.2.0
 */
SR_API int sr_exit(struct sr_context *ctx)
{
	if (!ctx) {
		sr_err("%s(): libsigrok context was NULL.", __func__);
		return SR_ERR;
	}

	sr_hw_cleanup_all();

#ifdef HAVE_LIBUSB_1_0
	libusb_exit(ctx->libusb_ctx);
#endif

	g_free(ctx);

	return SR_OK;
}

/** @} */
Commit	Line	Data
a1bb33af	1	/*
50985c20	2	* This file is part of the libsigrok project.
a1bb33af	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>
545f9786	22	#include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
45c59c8b BV	23	#include "libsigrok.h"
45c59c8b BV	24	#include "libsigrok-internal.h"
a1bb33af	25
2ad1deb8	26	/** @cond PRIVATE */
3544f848	27	#define LOG_PREFIX "backend"
2ad1deb8	28	/** @endcond */
3544f848	29
fa93154f BV	30	extern struct sr_session *session;
fa93154f BV	31
5b30cca7 UH	32	/**
	33	* @mainpage libsigrok API
	34	*
	35	* @section sec_intro Introduction
	36	*
	37	* The <a href="http://sigrok.org">sigrok</a> project aims at creating a
	38	* portable, cross-platform, Free/Libre/Open-Source signal analysis software
	39	* suite that supports various device types (such as logic analyzers,
	40	* oscilloscopes, multimeters, and more).
	41	*
	42	* <a href="http://sigrok.org/wiki/Libsigrok">libsigrok</a> is a shared
	43	* library written in C which provides the basic API for talking to
	44	* <a href="http://sigrok.org/wiki/Supported_hardware">supported hardware</a>
	45	* and reading/writing the acquired data into various
	46	* <a href="http://sigrok.org/wiki/Input_output_formats">input/output
	47	* file formats</a>.
	48	*
f21193fa	49	* @section sec_api API reference
5b30cca7	50	*
f21193fa UH	51	* See the "Modules" page for an introduction to various libsigrok
	52	* related topics and the detailed API documentation of the respective
	53	* functions.
	54	*
	55	* You can also browse the API documentation by file, or review all
	56	* data structures.
5b30cca7 UH	57	*
	58	* @section sec_mailinglists Mailing lists
	59	*
	60	* There are two mailing lists for sigrok/libsigrok: <a href="https://lists.sourceforge.net/lists/listinfo/sigrok-devel">sigrok-devel</a> and <a href="https://lists.sourceforge.net/lists/listinfo/sigrok-commits">sigrok-commits</a>.
	61	*
	62	* @section sec_irc IRC
	63	*
	64	* You can find the sigrok developers in the
	65	* <a href="irc://chat.freenode.net/sigrok">\#sigrok</a>
	66	* IRC channel on Freenode.
	67	*
	68	* @section sec_website Website
	69	*
	70	* <a href="http://sigrok.org/wiki/Libsigrok">sigrok.org/wiki/Libsigrok</a>
	71	*/
	72
393fb9cb UH	73	/**
	74	* @file
	75	*
	76	* Initializing and shutting down libsigrok.
	77	*/
	78
7b870c38 UH	79	/**
	80	* @defgroup grp_init Initialization
	81	*
	82	* Initializing and shutting down libsigrok.
	83	*
afe2f28e UH	84	* Before using any of the libsigrok functionality, sr_init() must
	85	* be called to initialize the library, which will return a struct sr_context
	86	* when the initialization was successful.
	87	*
	88	* When libsigrok functionality is no longer needed, sr_exit() should be
	89	* called, which will (among other things) free the struct sr_context.
	90	*
	91	* Example for a minimal program using libsigrok:
	92	*
	93	* @code{.c}
	94	* #include <stdio.h>
	95	* #include <libsigrok/libsigrok.h>
	96	*
	97	* int main(int argc, char **argv)
	98	* {
	99	* int ret;
	100	* struct sr_context *sr_ctx;
	101	*
	102	* if ((ret = sr_init(&sr_ctx)) != SR_OK) {
df823ac4	103	* printf("Error initializing libsigrok (%s): %s.\n",
afe2f28e UH	104	* sr_strerror_name(ret), sr_strerror(ret));
	105	* return 1;
	106	* }
	107	*
	108	* // Use libsigrok functions here...
	109	*
	110	* if ((ret = sr_exit(sr_ctx)) != SR_OK) {
df823ac4	111	* printf("Error shutting down libsigrok (%s): %s.\n",
afe2f28e UH	112	* sr_strerror_name(ret), sr_strerror(ret));
	113	* return 1;
	114	* }
	115	*
	116	* return 0;
	117	* }
	118	* @endcode
	119	*
7b870c38 UH	120	* @{
	121	*/
	122
55a6daf5 UH	123	/**
	124	* Sanity-check all libsigrok drivers.
	125	*
04cb9157 MH	126	* @retval SR_OK All drivers are OK
04cb9157 MH	127	* @retval SR_ERR One or more drivers have issues.
55a6daf5 UH	128	*/
	129	static int sanity_check_all_drivers(void)
	130	{
	131	int i, errors, ret = SR_OK;
	132	struct sr_dev_driver **drivers;
	133	const char *d;
	134
	135	sr_spew("Sanity-checking all drivers.");
	136
	137	drivers = sr_driver_list();
	138	for (i = 0; drivers[i]; i++) {
	139	errors = 0;
	140
	141	d = (drivers[i]->name) ? drivers[i]->name : "NULL";
	142
	143	if (!drivers[i]->name) {
	144	sr_err("No name in driver %d ('%s').", i, d);
	145	errors++;
	146	}
	147	if (!drivers[i]->longname) {
	148	sr_err("No longname in driver %d ('%s').", i, d);
	149	errors++;
	150	}
	151	if (drivers[i]->api_version < 1) {
	152	sr_err("API version in driver %d ('%s') < 1.", i, d);
	153	errors++;
	154	}
	155	if (!drivers[i]->init) {
	156	sr_err("No init in driver %d ('%s').", i, d);
	157	errors++;
	158	}
	159	if (!drivers[i]->cleanup) {
	160	sr_err("No cleanup in driver %d ('%s').", i, d);
	161	errors++;
	162	}
	163	if (!drivers[i]->scan) {
	164	sr_err("No scan in driver %d ('%s').", i, d);
	165	errors++;
	166	}
	167	if (!drivers[i]->dev_list) {
	168	sr_err("No dev_list in driver %d ('%s').", i, d);
	169	errors++;
	170	}
6fab7b8f UH	171	/* Note: config_get() is optional. */
	172	if (!drivers[i]->config_set) {
	173	sr_err("No config_set in driver %d ('%s').", i, d);
	174	errors++;
	175	}
	176	if (!drivers[i]->config_list) {
	177	sr_err("No config_list in driver %d ('%s').", i, d);
	178	errors++;
	179	}
55a6daf5 UH	180	if (!drivers[i]->dev_open) {
	181	sr_err("No dev_open in driver %d ('%s').", i, d);
	182	errors++;
	183	}
	184	if (!drivers[i]->dev_close) {
	185	sr_err("No dev_close in driver %d ('%s').", i, d);
	186	errors++;
	187	}
55a6daf5 UH	188	if (!drivers[i]->dev_acquisition_start) {
	189	sr_err("No dev_acquisition_start in driver %d ('%s').",
	190	i, d);
	191	errors++;
	192	}
	193	if (!drivers[i]->dev_acquisition_stop) {
	194	sr_err("No dev_acquisition_stop in driver %d ('%s').",
	195	i, d);
	196	errors++;
	197	}
	198
	199	/* Note: 'priv' is allowed to be NULL. */
	200
	201	if (errors == 0)
	202	continue;
	203
	204	ret = SR_ERR;
	205	}
	206
	207	return ret;
	208	}
	209
218e629f UH	210	/**
	211	* Sanity-check all libsigrok input modules.
	212	*
04cb9157 MH	213	* @retval SR_OK All modules are OK
04cb9157 MH	214	* @retval SR_ERR One or more modules have issues.
218e629f UH	215	*/
	216	static int sanity_check_all_input_modules(void)
	217	{
	218	int i, errors, ret = SR_OK;
	219	struct sr_input_format **inputs;
	220	const char *d;
	221
	222	sr_spew("Sanity-checking all input modules.");
	223
	224	inputs = sr_input_list();
	225	for (i = 0; inputs[i]; i++) {
	226	errors = 0;
	227
	228	d = (inputs[i]->id) ? inputs[i]->id : "NULL";
	229
	230	if (!inputs[i]->id) {
	231	sr_err("No ID in module %d ('%s').", i, d);
	232	errors++;
	233	}
	234	if (!inputs[i]->description) {
	235	sr_err("No description in module %d ('%s').", i, d);
	236	errors++;
	237	}
	238	if (!inputs[i]->format_match) {
	239	sr_err("No format_match in module %d ('%s').", i, d);
	240	errors++;
	241	}
	242	if (!inputs[i]->init) {
	243	sr_err("No init in module %d ('%s').", i, d);
	244	errors++;
	245	}
	246	if (!inputs[i]->loadfile) {
	247	sr_err("No loadfile in module %d ('%s').", i, d);
	248	errors++;
	249	}
	250
	251	if (errors == 0)
	252	continue;
	253
	254	ret = SR_ERR;
	255	}
	256
	257	return ret;
	258	}
	259
	260	/**
	261	* Sanity-check all libsigrok output modules.
	262	*
04cb9157 MH	263	* @retval SR_OK All modules are OK
04cb9157 MH	264	* @retval SR_ERR One or more modules have issues.
218e629f UH	265	*/
	266	static int sanity_check_all_output_modules(void)
	267	{
	268	int i, errors, ret = SR_OK;
	269	struct sr_output_format **outputs;
	270	const char *d;
	271
	272	sr_spew("Sanity-checking all output modules.");
	273
	274	outputs = sr_output_list();
	275	for (i = 0; outputs[i]; i++) {
	276	errors = 0;
	277
	278	d = (outputs[i]->id) ? outputs[i]->id : "NULL";
	279
	280	if (!outputs[i]->id) {
	281	sr_err("No ID in module %d ('%s').", i, d);
	282	errors++;
	283	}
	284	if (!outputs[i]->description) {
44559b2c	285	sr_err("No description in module '%s'.", d);
218e629f UH	286	errors++;
218e629f UH	287	}
44559b2c BV	288	if (!outputs[i]->receive) {
44559b2c BV	289	sr_err("No receive in module '%s'.", d);
218e629f UH	290	errors++;
	291	}
	292
218e629f UH	293	if (errors == 0)
	294	continue;
	295
	296	ret = SR_ERR;
	297	}
	298
	299	return ret;
	300	}
	301
cd009d55 UH	302	/**
	303	* Initialize libsigrok.
	304	*
c46762a2 UH	305	* This function must be called before any other libsigrok function.
	306	*
	307	* @param ctx Pointer to a libsigrok context struct pointer. Must not be NULL.
	308	* This will be a pointer to a newly allocated libsigrok context
	309	* object upon success, and is undefined upon errors.
	310	*
	311	* @return SR_OK upon success, a (negative) error code otherwise. Upon errors
	312	* the 'ctx' pointer is undefined and should not be used. Upon success,
	313	* the context will be free'd by sr_exit() as part of the libsigrok
	314	* shutdown.
9fb5f2df	315	*
53f05fa8	316	* @since 0.2.0
cd009d55	317	*/
b8072700	318	SR_API int sr_init(struct sr_context **ctx)
a1bb33af	319	{
b8072700 PS	320	int ret = SR_ERR;
	321	struct sr_context *context;
	322
c46762a2 UH	323	if (!ctx) {
	324	sr_err("%s(): libsigrok context was NULL.", __func__);
	325	return SR_ERR;
	326	}
	327
55a6daf5 UH	328	if (sanity_check_all_drivers() < 0) {
	329	sr_err("Internal driver error(s), aborting.");
	330	return ret;
	331	}
	332
218e629f UH	333	if (sanity_check_all_input_modules() < 0) {
	334	sr_err("Internal input module error(s), aborting.");
	335	return ret;
	336	}
	337
	338	if (sanity_check_all_output_modules() < 0) {
	339	sr_err("Internal output module error(s), aborting.");
	340	return ret;
	341	}
	342
b8072700 PS	343	/* + 1 to handle when struct sr_context has no members. */
	344	context = g_try_malloc0(sizeof(struct sr_context) + 1);
	345
	346	if (!context) {
	347	ret = SR_ERR_MALLOC;
	348	goto done;
	349	}
	350
785b9ff2 PS	351	#ifdef HAVE_LIBUSB_1_0
785b9ff2 PS	352	ret = libusb_init(&context->libusb_ctx);
8e2d43cc	353	if (LIBUSB_SUCCESS != ret) {
9d122af8	354	sr_err("libusb_init() returned %s.", libusb_error_name(ret));
63c07e48	355	ret = SR_ERR;
785b9ff2 PS	356	goto done;
	357	}
	358	#endif
	359
b8072700	360	*ctx = context;
123d97b1	361	context = NULL;
fa93154f	362	session = NULL;
b8072700 PS	363	ret = SR_OK;
	364
	365	done:
123d97b1 PS	366	if (context)
123d97b1 PS	367	g_free(context);
b8072700	368	return ret;
a1bb33af UH	369	}
a1bb33af UH	370
cd009d55 UH	371	/**
	372	* Shutdown libsigrok.
	373	*
c46762a2 UH	374	* @param ctx Pointer to a libsigrok context struct. Must not be NULL.
c46762a2 UH	375	*
04cb9157 MH	376	* @retval SR_OK Success
04cb9157 MH	377	* @retval other Error code SR_ERR, ...
9fb5f2df	378	*
53f05fa8	379	* @since 0.2.0
cd009d55	380	*/
b8072700	381	SR_API int sr_exit(struct sr_context *ctx)
a1bb33af	382	{
c46762a2 UH	383	if (!ctx) {
	384	sr_err("%s(): libsigrok context was NULL.", __func__);
	385	return SR_ERR;
	386	}
	387
93a04e3b	388	sr_hw_cleanup_all();
cd009d55	389
785b9ff2 PS	390	#ifdef HAVE_LIBUSB_1_0
	391	libusb_exit(ctx->libusb_ctx);
	392	#endif
	393
b8072700 PS	394	g_free(ctx);
b8072700 PS	395
cd009d55	396	return SR_OK;
a1bb33af	397	}
7b870c38 UH	398
7b870c38 UH	399	/** @} */