* LTTng lib ring buffer client template.
*/
+#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include "ust-compat.h"
#include "lttng-tracer.h"
#include "../libringbuffer/frontend_types.h"
+#include <urcu/tls-compat.h>
struct metadata_packet_header {
uint32_t magic; /* 0x75D11D57 */
static const struct lttng_ust_lib_ring_buffer_config client_config;
+/* No nested use supported for metadata ring buffer. */
+static DEFINE_URCU_TLS(struct lttng_ust_lib_ring_buffer_ctx_private, private_ctx);
+
static inline uint64_t lib_ring_buffer_clock_read(struct lttng_ust_lib_ring_buffer_channel *chan)
{
return 0;
stream_fds, nr_stream_fds, blocking_timeout);
if (!handle)
goto error;
- lttng_chan_buf->handle = handle;
- lttng_chan_buf->chan = shmp(handle, handle->chan);
+ lttng_chan_buf->priv->rb_chan = shmp(handle, handle->chan);
return lttng_chan_buf;
error:
static
void lttng_channel_destroy(struct lttng_ust_channel_buffer *lttng_chan_buf)
{
- channel_destroy(lttng_chan_buf->chan, lttng_chan_buf->handle, 1);
+ channel_destroy(lttng_chan_buf->priv->rb_chan, lttng_chan_buf->priv->rb_chan->handle, 1);
lttng_ust_free_channel_common(lttng_chan_buf->parent);
}
static
-int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx, uint32_t event_id)
+int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx)
{
int ret;
+ memset(&private_ctx, 0, sizeof(private_ctx));
+ private_ctx.pub = ctx;
+ private_ctx.chan = ctx->client_priv;
+ ctx->priv = &private_ctx;
ret = lib_ring_buffer_reserve(&client_config, ctx, NULL);
if (ret)
return ret;
if (lib_ring_buffer_backend_get_pages(&client_config, ctx,
- &ctx->backend_pages))
+ &ctx->priv->backend_pages))
return -EPERM;
return 0;
}
}
static
-void lttng_event_write(struct lttng_ust_lib_ring_buffer_ctx *ctx, const void *src,
- size_t len)
+void lttng_event_write(struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ const void *src, size_t len, size_t alignment)
{
+ lttng_ust_lib_ring_buffer_align_ctx(ctx, alignment);
lib_ring_buffer_write(&client_config, ctx, src, len);
}
static
-size_t lttng_packet_avail_size(struct lttng_ust_lib_ring_buffer_channel *chan,
- struct lttng_ust_shm_handle *handle)
+size_t lttng_packet_avail_size(struct lttng_ust_channel_buffer *chan)
{
+ struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan;
unsigned long o_begin;
struct lttng_ust_lib_ring_buffer *buf;
- buf = shmp(handle, chan->backend.buf[0].shmp); /* Only for global buffer ! */
+ buf = shmp(rb_chan->handle, rb_chan->backend.buf[0].shmp); /* Only for global buffer ! */
o_begin = v_read(&client_config, &buf->offset);
- if (subbuf_offset(o_begin, chan) != 0) {
- return chan->backend.subbuf_size - subbuf_offset(o_begin, chan);
+ if (subbuf_offset(o_begin, rb_chan) != 0) {
+ return rb_chan->backend.subbuf_size - subbuf_offset(o_begin, rb_chan);
} else {
- return chan->backend.subbuf_size - subbuf_offset(o_begin, chan)
+ return rb_chan->backend.subbuf_size - subbuf_offset(o_begin, rb_chan)
- sizeof(struct metadata_packet_header);
}
}
-#if 0
static
-wait_queue_head_t *lttng_get_reader_wait_queue(struct lttng_ust_lib_ring_buffer_channel *chan)
+int lttng_is_finalized(struct lttng_ust_channel_buffer *chan)
{
- return &chan->read_wait;
-}
+ struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan;
-static
-wait_queue_head_t *lttng_get_hp_wait_queue(struct lttng_ust_lib_ring_buffer_channel *chan)
-{
- return &chan->hp_wait;
+ return lib_ring_buffer_channel_is_finalized(rb_chan);
}
-#endif //0
static
-int lttng_is_finalized(struct lttng_ust_lib_ring_buffer_channel *chan)
+int lttng_is_disabled(struct lttng_ust_channel_buffer *chan)
{
- return lib_ring_buffer_channel_is_finalized(chan);
-}
+ struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan;
-static
-int lttng_is_disabled(struct lttng_ust_lib_ring_buffer_channel *chan)
-{
- return lib_ring_buffer_channel_is_disabled(chan);
+ return lib_ring_buffer_channel_is_disabled(rb_chan);
}
static
-int lttng_flush_buffer(struct lttng_ust_lib_ring_buffer_channel *chan,
- struct lttng_ust_shm_handle *handle)
+int lttng_flush_buffer(struct lttng_ust_channel_buffer *chan)
{
+ struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan;
struct lttng_ust_lib_ring_buffer *buf;
int shm_fd, wait_fd, wakeup_fd;
uint64_t memory_map_size;
- buf = channel_get_ring_buffer(&client_config, chan,
- 0, handle, &shm_fd, &wait_fd, &wakeup_fd,
+ buf = channel_get_ring_buffer(&client_config, rb_chan,
+ 0, rb_chan->handle, &shm_fd, &wait_fd, &wakeup_fd,
&memory_map_size);
lib_ring_buffer_switch(&client_config, buf,
- SWITCH_ACTIVE, handle);
+ SWITCH_ACTIVE, rb_chan->handle);
return 0;
}
static struct lttng_transport lttng_relay_transport = {
.name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap",
.ops = {
- .struct_size = sizeof(struct lttng_ust_channel_ops),
+ .struct_size = sizeof(struct lttng_ust_channel_buffer_ops),
- .priv = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_channel_ops_private, {
+ .priv = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_channel_buffer_ops_private, {
.pub = <tng_relay_transport.ops,
.channel_create = _channel_create,
.channel_destroy = lttng_channel_destroy,