C++ (Cpp) threads_cleanup Examples

Example #1

File: ntb_perf.c Project: AshishNamdev/linux

static ssize_t debugfs_run_write(struct file *filp, const char __user *ubuf,
				 size_t count, loff_t *offp)
{
	struct perf_ctx *perf = filp->private_data;
	int node, i;
	DECLARE_WAIT_QUEUE_HEAD(wq);

	if (wait_event_interruptible(perf->link_wq, perf->link_is_up))
		return -ENOLINK;

	if (perf->perf_threads == 0)
		return -EINVAL;

	if (!mutex_trylock(&perf->run_mutex))
		return -EBUSY;

	perf_clear_thread_status(perf);

	if (perf->perf_threads > MAX_THREADS) {
		perf->perf_threads = MAX_THREADS;
		pr_info("Reset total threads to: %u\n", MAX_THREADS);
	}

	/* no greater than 1M */
	if (seg_order > MAX_SEG_ORDER) {
		seg_order = MAX_SEG_ORDER;
		pr_info("Fix seg_order to %u\n", seg_order);
	}

	if (run_order < seg_order) {
		run_order = seg_order;
		pr_info("Fix run_order to %u\n", run_order);
	}

	node = dev_to_node(&perf->ntb->pdev->dev);
	atomic_set(&perf->tdone, 0);

	/* launch kernel thread */
	for (i = 0; i < perf->perf_threads; i++) {
		struct pthr_ctx *pctx;

		pctx = &perf->pthr_ctx[i];
		atomic_set(&pctx->dma_sync, 0);
		pctx->perf = perf;
		pctx->wq = &wq;
		pctx->thread =
			kthread_create_on_node(ntb_perf_thread,
					       (void *)pctx,
					       node, "ntb_perf %d", i);
		if (IS_ERR(pctx->thread)) {
			pctx->thread = NULL;
			goto err;
		} else {
			wake_up_process(pctx->thread);
		}
	}

	wait_event_interruptible(wq,
		atomic_read(&perf->tdone) == perf->perf_threads);

	threads_cleanup(perf);
	mutex_unlock(&perf->run_mutex);
	return count;

err:
	threads_cleanup(perf);
	mutex_unlock(&perf->run_mutex);
	return -ENXIO;
}

Example #2

File: ntb_perf.c Project: 020gzh/linux

static ssize_t debugfs_run_write(struct file *filp, const char __user *ubuf,
				 size_t count, loff_t *offp)
{
	struct perf_ctx *perf = filp->private_data;
	int node, i;

	if (!perf->link_is_up)
		return 0;

	if (perf->perf_threads == 0)
		return 0;

	if (atomic_read(&perf->tsync) == 0)
		perf->run = false;

	if (perf->run)
		threads_cleanup(perf);
	else {
		perf->run = true;

		if (perf->perf_threads > MAX_THREADS) {
			perf->perf_threads = MAX_THREADS;
			pr_info("Reset total threads to: %u\n", MAX_THREADS);
		}

		/* no greater than 1M */
		if (seg_order > MAX_SEG_ORDER) {
			seg_order = MAX_SEG_ORDER;
			pr_info("Fix seg_order to %u\n", seg_order);
		}

		if (run_order < seg_order) {
			run_order = seg_order;
			pr_info("Fix run_order to %u\n", run_order);
		}

		node = dev_to_node(&perf->ntb->pdev->dev);
		/* launch kernel thread */
		for (i = 0; i < perf->perf_threads; i++) {
			struct pthr_ctx *pctx;

			pctx = &perf->pthr_ctx[i];
			atomic_set(&pctx->dma_sync, 0);
			pctx->perf = perf;
			pctx->thread =
				kthread_create_on_node(ntb_perf_thread,
						       (void *)pctx,
						       node, "ntb_perf %d", i);
			if (IS_ERR(pctx->thread)) {
				pctx->thread = NULL;
				goto err;
			} else
				wake_up_process(pctx->thread);

			if (perf->run == false)
				return -ENXIO;
		}

	}

	return count;

err:
	threads_cleanup(perf);
	return -ENXIO;
}