C++ (Cpp) ring_buffer_event_lengthの例

コード例 #1

ファイル: cpu_buffer.c プロジェクト: concocon/CodeAnalyst-3_4_18_0413-Public

struct op_sample *op_cpu_buffer_read_entry(struct op_entry *entry, int cpu)
{
	struct ring_buffer_event *e;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)	
	e = ring_buffer_consume(op_ring_buffer_read, cpu, NULL, NULL);
#else
	e = ring_buffer_consume(op_ring_buffer_read, cpu, NULL);
#endif
	if (e)
		goto event;
	if (ring_buffer_swap_cpu(op_ring_buffer_read,
				 op_ring_buffer_write,
				 cpu))
		return NULL;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)	
	e = ring_buffer_consume(op_ring_buffer_read, cpu, NULL, NULL);
#else
	e = ring_buffer_consume(op_ring_buffer_read, cpu, NULL);
#endif
	if (e)
		goto event;
	return NULL;

event:
	entry->event = e;
	entry->sample = ring_buffer_event_data(e);
	entry->size = (ring_buffer_event_length(e) - sizeof(struct op_sample))
		/ sizeof(entry->sample->data[0]);
	entry->data = entry->sample->data;
	return entry->sample;
}

コード例 #2

ファイル: cpu_buffer.c プロジェクト: 12rafael/jellytimekernel

struct op_sample *op_cpu_buffer_read_entry(struct op_entry *entry, int cpu)
{
	struct ring_buffer_event *e;
	e = ring_buffer_consume(op_ring_buffer, cpu, NULL, NULL);
	if (!e)
		return NULL;

	entry->event = e;
	entry->sample = ring_buffer_event_data(e);
	entry->size = (ring_buffer_event_length(e) - sizeof(struct op_sample))
		/ sizeof(entry->sample->data[0]);
	entry->data = entry->sample->data;
	return entry->sample;
}