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C++ snd_use_lock_free函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中snd_use_lock_free函数的典型用法代码示例。如果您正苦于以下问题：C++ snd_use_lock_free函数的具体用法？C++ snd_use_lock_free怎么用？C++ snd_use_lock_free使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了snd_use_lock_free函数的14个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: snd_seq_oss_midi_close

/*
 * close the midi device if already opened
 */
int
snd_seq_oss_midi_close(struct seq_oss_devinfo *dp, int dev)
{
	struct seq_oss_midi *mdev;
	struct snd_seq_port_subscribe subs;

	if ((mdev = get_mididev(dp, dev)) == NULL)
		return -ENODEV;
	if (! mdev->opened || mdev->devinfo != dp) {
		snd_use_lock_free(&mdev->use_lock);
		return 0;
	}

	memset(&subs, 0, sizeof(subs));
	if (mdev->opened & PERM_WRITE) {
		subs.sender = dp->addr;
		subs.dest.client = mdev->client;
		subs.dest.port = mdev->port;
		snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
	}
	if (mdev->opened & PERM_READ) {
		subs.sender.client = mdev->client;
		subs.sender.port = mdev->port;
		subs.dest = dp->addr;
		snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
	}

	mdev->opened = 0;
	mdev->devinfo = NULL;

	snd_use_lock_free(&mdev->use_lock);
	return 0;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:36，代码来源:seq_oss_midi.c


示例2: snd_seq_oss_synth_setup

void
snd_seq_oss_synth_setup(struct seq_oss_devinfo *dp)
{
	int i;
	struct seq_oss_synth *rec;
	struct seq_oss_synthinfo *info;

	dp->max_synthdev = max_synth_devs;
	dp->synth_opened = 0;
	memset(dp->synths, 0, sizeof(dp->synths));
	for (i = 0; i < dp->max_synthdev; i++) {
		rec = get_sdev(i);
		if (rec == NULL)
			continue;
		if (rec->oper.open == NULL || rec->oper.close == NULL) {
			snd_use_lock_free(&rec->use_lock);
			continue;
		}
		info = &dp->synths[i];
		info->arg.app_index = dp->port;
		info->arg.file_mode = dp->file_mode;
		info->arg.seq_mode = dp->seq_mode;
		if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH)
			info->arg.event_passing = SNDRV_SEQ_OSS_PROCESS_EVENTS;
		else
			info->arg.event_passing = SNDRV_SEQ_OSS_PASS_EVENTS;
		info->opened = 0;
		if (!try_module_get(rec->oper.owner)) {
			snd_use_lock_free(&rec->use_lock);
			continue;
		}
		if (rec->oper.open(&info->arg, rec->private_data) < 0) {
			module_put(rec->oper.owner);
			snd_use_lock_free(&rec->use_lock);
			continue;
		}
		info->nr_voices = rec->nr_voices;
		if (info->nr_voices > 0) {
			info->ch = kcalloc(info->nr_voices, sizeof(struct seq_oss_chinfo), GFP_KERNEL);
			if (!info->ch) {
				snd_printk(KERN_ERR "Cannot malloc\n");
				rec->oper.close(&info->arg);
				module_put(rec->oper.owner);
				snd_use_lock_free(&rec->use_lock);
				continue;
			}
			reset_channels(info);
		}
#ifdef CONFIG_DEBUG_PRINTK
		debug_printk(("synth %d assigned\n", i));
#else
		debug_;
#endif
		info->opened++;
		rec->opened++;
		dp->synth_opened++;
		snd_use_lock_free(&rec->use_lock);
	}
}
开发者ID:nos1609，项目名称:Chrono_Kernel-1，代码行数:59，代码来源:seq_oss_synth.c


示例3: snd_seq_oss_midi_putc

/*
 * dump midi data
 * return 0 : enqueued
 *        non-zero : invalid - ignored
 */
int
snd_seq_oss_midi_putc(struct seq_oss_devinfo *dp, int dev, unsigned char c, struct snd_seq_event *ev)
{
	struct seq_oss_midi *mdev;

	if ((mdev = get_mididev(dp, dev)) == NULL)
		return -ENODEV;
	if (snd_midi_event_encode_byte(mdev->coder, c, ev) > 0) {
		snd_seq_oss_fill_addr(dp, ev, mdev->client, mdev->port);
		snd_use_lock_free(&mdev->use_lock);
		return 0;
	}
	snd_use_lock_free(&mdev->use_lock);
	return -EINVAL;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:20，代码来源:seq_oss_midi.c


示例4: snd_seq_oss_midi_check_exit_port

/*
 * release the midi device if it was registered
 */
int
snd_seq_oss_midi_check_exit_port(int client, int port)
{
	struct seq_oss_midi *mdev;
	unsigned long flags;
	int index;

	if ((mdev = find_slot(client, port)) != NULL) {
		spin_lock_irqsave(&register_lock, flags);
		midi_devs[mdev->seq_device] = NULL;
		spin_unlock_irqrestore(&register_lock, flags);
		snd_use_lock_free(&mdev->use_lock);
		snd_use_lock_sync(&mdev->use_lock);
		snd_midi_event_free(mdev->coder);
		kfree(mdev);
	}
	spin_lock_irqsave(&register_lock, flags);
	for (index = max_midi_devs - 1; index >= 0; index--) {
		if (midi_devs[index])
			break;
	}
	max_midi_devs = index + 1;
	spin_unlock_irqrestore(&register_lock, flags);
	return 0;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:28，代码来源:seq_oss_midi.c


示例5: snd_seq_oss_midi_reset

/*
 * reset the midi device and close it:
 * so far, only close the device.
 */
void
snd_seq_oss_midi_reset(struct seq_oss_devinfo *dp, int dev)
{
	struct seq_oss_midi *mdev;

	if ((mdev = get_mididev(dp, dev)) == NULL)
		return;
	if (! mdev->opened) {
		snd_use_lock_free(&mdev->use_lock);
		return;
	}

	if (mdev->opened & PERM_WRITE) {
		struct snd_seq_event ev;
		int c;

		debug_printk(("resetting client %d port %d\n", mdev->client, mdev->port));
		memset(&ev, 0, sizeof(ev));
		ev.dest.client = mdev->client;
		ev.dest.port = mdev->port;
		ev.queue = dp->queue;
		ev.source.port = dp->port;
		if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH) {
			ev.type = SNDRV_SEQ_EVENT_SENSING;
			snd_seq_oss_dispatch(dp, &ev, 0, 0);
		}
		for (c = 0; c < 16; c++) {
			ev.type = SNDRV_SEQ_EVENT_CONTROLLER;
			ev.data.control.channel = c;
			ev.data.control.param = MIDI_CTL_ALL_NOTES_OFF;
			snd_seq_oss_dispatch(dp, &ev, 0, 0);
			if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) {
				ev.data.control.param =
					MIDI_CTL_RESET_CONTROLLERS;
				snd_seq_oss_dispatch(dp, &ev, 0, 0);
				ev.type = SNDRV_SEQ_EVENT_PITCHBEND;
				ev.data.control.value = 0;
				snd_seq_oss_dispatch(dp, &ev, 0, 0);
			}
		}
	}
	// snd_seq_oss_midi_close(dp, dev);
	snd_use_lock_free(&mdev->use_lock);
}
开发者ID:mikuhatsune001，项目名称:linux2.6.32，代码行数:48，代码来源:seq_oss_midi.c


示例6: snd_seq_oss_midi_get_addr

/*
 * get client/port of the specified MIDI device
 */
void
snd_seq_oss_midi_get_addr(struct seq_oss_devinfo *dp, int dev, struct snd_seq_addr *addr)
{
	struct seq_oss_midi *mdev;

	if ((mdev = get_mididev(dp, dev)) == NULL)
		return;
	addr->client = mdev->client;
	addr->port = mdev->port;
	snd_use_lock_free(&mdev->use_lock);
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:14，代码来源:seq_oss_midi.c


示例7: snd_seq_oss_midi_make_info

/*
 * create OSS compatible midi_info record
 */
int
snd_seq_oss_midi_make_info(struct seq_oss_devinfo *dp, int dev, struct midi_info *inf)
{
	struct seq_oss_midi *mdev;

	if ((mdev = get_mididev(dp, dev)) == NULL)
		return -ENXIO;
	inf->device = dev;
	inf->dev_type = 0; /* FIXME: ?? */
	inf->capabilities = 0; /* FIXME: ?? */
	strlcpy(inf->name, mdev->name, sizeof(inf->name));
	snd_use_lock_free(&mdev->use_lock);
	return 0;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:17，代码来源:seq_oss_midi.c


示例8: snd_seq_oss_midi_input

/*
 * input callback - this can be atomic
 */
int
snd_seq_oss_midi_input(struct snd_seq_event *ev, int direct, void *private_data)
{
	struct seq_oss_devinfo *dp = (struct seq_oss_devinfo *)private_data;
	struct seq_oss_midi *mdev;
	int rc;

	if (dp->readq == NULL)
		return 0;
	if ((mdev = find_slot(ev->source.client, ev->source.port)) == NULL)
		return 0;
	if (! (mdev->opened & PERM_READ)) {
		snd_use_lock_free(&mdev->use_lock);
		return 0;
	}

	if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
		rc = send_synth_event(dp, ev, mdev->seq_device);
	else
		rc = send_midi_event(dp, ev, mdev);

	snd_use_lock_free(&mdev->use_lock);
	return rc;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:27，代码来源:seq_oss_midi.c


示例9: snd_seq_oss_midi_filemode

/*
 * change seq capability flags to file mode flags
 */
int
snd_seq_oss_midi_filemode(struct seq_oss_devinfo *dp, int dev)
{
	struct seq_oss_midi *mdev;
	int mode;

	if ((mdev = get_mididev(dp, dev)) == NULL)
		return 0;

	mode = 0;
	if (mdev->opened & PERM_WRITE)
		mode |= SNDRV_SEQ_OSS_FILE_WRITE;
	if (mdev->opened & PERM_READ)
		mode |= SNDRV_SEQ_OSS_FILE_READ;

	snd_use_lock_free(&mdev->use_lock);
	return mode;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:21，代码来源:seq_oss_midi.c


示例10: snd_seq_oss_synth_cleanup

void
snd_seq_oss_synth_cleanup(struct seq_oss_devinfo *dp)
{
	int i;
	struct seq_oss_synth *rec;
	struct seq_oss_synthinfo *info;

	if (snd_BUG_ON(dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS))
		return;
	for (i = 0; i < dp->max_synthdev; i++) {
		info = &dp->synths[i];
		if (! info->opened)
			continue;
		if (info->is_midi) {
			if (midi_synth_dev.opened > 0) {
				snd_seq_oss_midi_close(dp, info->midi_mapped);
				midi_synth_dev.opened--;
			}
		} else {
			rec = get_sdev(i);
			if (rec == NULL)
				continue;
			if (rec->opened > 0) {
#ifdef CONFIG_DEBUG_PRINTK
				debug_printk(("synth %d closed\n", i));
#else
				debug_;
#endif
				rec->oper.close(&info->arg);
				module_put(rec->oper.owner);
				rec->opened = 0;
			}
			snd_use_lock_free(&rec->use_lock);
		}
		kfree(info->sysex);
		info->sysex = NULL;
		kfree(info->ch);
		info->ch = NULL;
	}
	dp->synth_opened = 0;
	dp->max_synthdev = 0;
}
开发者ID:nos1609，项目名称:Chrono_Kernel-1，代码行数:42，代码来源:seq_oss_synth.c


示例11: snd_seq_oss_midi_info_read

void
snd_seq_oss_midi_info_read(struct snd_info_buffer *buf)
{
	int i;
	struct seq_oss_midi *mdev;

	snd_iprintf(buf, "\nNumber of MIDI devices: %d\n", max_midi_devs);
	for (i = 0; i < max_midi_devs; i++) {
		snd_iprintf(buf, "\nmidi %d: ", i);
		mdev = get_mdev(i);
		if (mdev == NULL) {
			snd_iprintf(buf, "*empty*\n");
			continue;
		}
		snd_iprintf(buf, "[%s] ALSA port %d:%d\n", mdev->name,
			    mdev->client, mdev->port);
		snd_iprintf(buf, "  capability %s / opened %s\n",
			    capmode_str(mdev->flags),
			    capmode_str(mdev->opened));
		snd_use_lock_free(&mdev->use_lock);
	}
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:22，代码来源:seq_oss_midi.c


示例12: snd_seq_oss_midi_check_new_port

/*
 * register a new port if it doesn't exist yet
 */
int
snd_seq_oss_midi_check_new_port(struct snd_seq_port_info *pinfo)
{
	int i;
	struct seq_oss_midi *mdev;
	unsigned long flags;

	/* the port must include generic midi */
	if (! (pinfo->type & SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC))
		return 0;
	/* either read or write subscribable */
	if ((pinfo->capability & PERM_WRITE) != PERM_WRITE &&
	    (pinfo->capability & PERM_READ) != PERM_READ)
		return 0;

	/*
	 * look for the identical slot
	 */
	if ((mdev = find_slot(pinfo->addr.client, pinfo->addr.port)) != NULL) {
		/* already exists */
		snd_use_lock_free(&mdev->use_lock);
		return 0;
	}

	/*
	 * allocate midi info record
	 */
	mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
	if (!mdev)
		return -ENOMEM;

	/* copy the port information */
	mdev->client = pinfo->addr.client;
	mdev->port = pinfo->addr.port;
	mdev->flags = pinfo->capability;
	mdev->opened = 0;
	snd_use_lock_init(&mdev->use_lock);

	/* copy and truncate the name of synth device */
	strlcpy(mdev->name, pinfo->name, sizeof(mdev->name));

	/* create MIDI coder */
	if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &mdev->coder) < 0) {
		pr_err("ALSA: seq_oss: can't malloc midi coder\n");
		kfree(mdev);
		return -ENOMEM;
	}
	/* OSS sequencer adds running status to all sequences */
	snd_midi_event_no_status(mdev->coder, 1);

	/*
	 * look for en empty slot
	 */
	spin_lock_irqsave(&register_lock, flags);
	for (i = 0; i < max_midi_devs; i++) {
		if (midi_devs[i] == NULL)
			break;
	}
	if (i >= max_midi_devs) {
		if (max_midi_devs >= SNDRV_SEQ_OSS_MAX_MIDI_DEVS) {
			spin_unlock_irqrestore(&register_lock, flags);
			snd_midi_event_free(mdev->coder);
			kfree(mdev);
			return -ENOMEM;
		}
		max_midi_devs++;
	}
	mdev->seq_device = i;
	midi_devs[mdev->seq_device] = mdev;
	spin_unlock_irqrestore(&register_lock, flags);

	return 0;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:76，代码来源:seq_oss_midi.c


示例13: snd_seq_oss_midi_check_new_port

int
snd_seq_oss_midi_check_new_port(struct snd_seq_port_info *pinfo)
{
	int i;
	struct seq_oss_midi *mdev;
	unsigned long flags;

	debug_printk(("check for MIDI client %d port %d\n", pinfo->addr.client, pinfo->addr.port));
	/*                                    */
	if (! (pinfo->type & SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC))
		return 0;
	/*                                   */
	if ((pinfo->capability & PERM_WRITE) != PERM_WRITE &&
	    (pinfo->capability & PERM_READ) != PERM_READ)
		return 0;

	/*
                               
  */
	if ((mdev = find_slot(pinfo->addr.client, pinfo->addr.port)) != NULL) {
		/*                */
		snd_use_lock_free(&mdev->use_lock);
		return 0;
	}

	/*
                             
  */
	if ((mdev = kzalloc(sizeof(*mdev), GFP_KERNEL)) == NULL) {
		snd_printk(KERN_ERR "can't malloc midi info\n");
		return -ENOMEM;
	}

	/*                           */
	mdev->client = pinfo->addr.client;
	mdev->port = pinfo->addr.port;
	mdev->flags = pinfo->capability;
	mdev->opened = 0;
	snd_use_lock_init(&mdev->use_lock);

	/*                                            */
	strlcpy(mdev->name, pinfo->name, sizeof(mdev->name));

	/*                   */
	if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &mdev->coder) < 0) {
		snd_printk(KERN_ERR "can't malloc midi coder\n");
		kfree(mdev);
		return -ENOMEM;
	}
	/*                                                    */
	snd_midi_event_no_status(mdev->coder, 1);

	/*
                          
  */
	spin_lock_irqsave(&register_lock, flags);
	for (i = 0; i < max_midi_devs; i++) {
		if (midi_devs[i] == NULL)
			break;
	}
	if (i >= max_midi_devs) {
		if (max_midi_devs >= SNDRV_SEQ_OSS_MAX_MIDI_DEVS) {
			spin_unlock_irqrestore(&register_lock, flags);
			snd_midi_event_free(mdev->coder);
			kfree(mdev);
			return -ENOMEM;
		}
		max_midi_devs++;
	}
	mdev->seq_device = i;
	midi_devs[mdev->seq_device] = mdev;
	spin_unlock_irqrestore(&register_lock, flags);

	return 0;
}
开发者ID:romanbb，项目名称:android_kernel_lge_d851，代码行数:75，代码来源:seq_oss_midi.c


示例14: snd_seq_oss_midi_open

/*
 * open the midi device if not opened yet
 */
int
snd_seq_oss_midi_open(struct seq_oss_devinfo *dp, int dev, int fmode)
{
	int perm;
	struct seq_oss_midi *mdev;
	struct snd_seq_port_subscribe subs;

	if ((mdev = get_mididev(dp, dev)) == NULL)
		return -ENODEV;

	/* already used? */
	if (mdev->opened && mdev->devinfo != dp) {
		snd_use_lock_free(&mdev->use_lock);
		return -EBUSY;
	}

	perm = 0;
	if (is_write_mode(fmode))
		perm |= PERM_WRITE;
	if (is_read_mode(fmode))
		perm |= PERM_READ;
	perm &= mdev->flags;
	if (perm == 0) {
		snd_use_lock_free(&mdev->use_lock);
		return -ENXIO;
	}

	/* already opened? */
	if ((mdev->opened & perm) == perm) {
		snd_use_lock_free(&mdev->use_lock);
		return 0;
	}

	perm &= ~mdev->opened;

	memset(&subs, 0, sizeof(subs));

	if (perm & PERM_WRITE) {
		subs.sender = dp->addr;
		subs.dest.client = mdev->client;
		subs.dest.port = mdev->port;
		if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
			mdev->opened |= PERM_WRITE;
	}
	if (perm & PERM_READ) {
		subs.sender.client = mdev->client;
		subs.sender.port = mdev->port;
		subs.dest = dp->addr;
		subs.flags = SNDRV_SEQ_PORT_SUBS_TIMESTAMP;
		subs.queue = dp->queue;		/* queue for timestamps */
		if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
			mdev->opened |= PERM_READ;
	}

	if (! mdev->opened) {
		snd_use_lock_free(&mdev->use_lock);
		return -ENXIO;
	}

	mdev->devinfo = dp;
	snd_use_lock_free(&mdev->use_lock);
	return 0;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:66，代码来源:seq_oss_midi.c



注：本文中的snd_use_lock_free函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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