#include "ltt-tracer-core.h"
#include "ltt-events.h"
+#ifndef CHAR_BIT
+#define CHAR_BIT 8
+#endif
+
/* Number of bytes to log with a read/write event */
#define LTT_LOG_RW_SIZE 32L
#define LTT_MAX_SMALL_SIZE 0xFFFFU
-/*
- * We use asm/timex.h : cpu_khz/HZ variable in here : we might have to deal
- * specifically with CPU frequency scaling someday, so using an interpolation
- * between the start and end of buffer values is not flexible enough. Using an
- * immediate frequency value permits to calculate directly the times for parts
- * of a buffer that would be before a frequency change.
- *
- * Keep the natural field alignment for _each field_ within this structure if
- * you ever add/remove a field from this header. Packed attribute is not used
- * because gcc generates poor code on at least powerpc and mips. Don't ever
- * let gcc add padding between the structure elements.
- */
-struct packet_header {
- uint32_t magic; /*
- * Trace magic number.
- * contains endianness information.
- */
- uint8_t trace_uuid[16];
- uint32_t stream_id;
- uint64_t timestamp_begin; /* Cycle count at subbuffer start */
- uint64_t timestamp_end; /* Cycle count at subbuffer end */
- uint32_t content_size; /* Size of data in subbuffer */
- uint32_t packet_size; /* Subbuffer size (include padding) */
- uint32_t events_lost; /*
- * Events lost in this subbuffer since
- * the beginning of the trace.
- * (may overflow)
- */
- /* TODO: move to metadata */
-#if 0
- uint8_t major_version;
- uint8_t minor_version;
- uint8_t arch_size; /* Architecture pointer size */
- uint8_t alignment; /* LTT data alignment */
- uint64_t start_time_sec; /* NTP-corrected start time */
- uint64_t start_time_usec;
- uint64_t start_freq; /*
- * Frequency at trace start,
- * used all along the trace.
- */
- uint32_t freq_scale; /* Frequency scaling (divisor) */
-#endif //0
- uint8_t header_end[0]; /* End of header */
-};
+#ifdef RING_BUFFER_ALIGN
+static inline
+size_t ltt_get_header_alignment(void)
+{
+ return sizeof(struct event_header) * CHAR_BIT;
+}
+
+#define ltt_alignof(type) __alignof__(type)
+#else
+static inline
+size_t ltt_get_header_alignment(void)
+{
+ return CHAR_BIT;
+}
+
+#define ltt_alignof(type) 1
+#endif
/* Tracer properties */
#define CTF_MAGIC_NUMBER 0xC1FC1FC1
#define TSDL_MAGIC_NUMBER 0x75D11D57
-#define LTT_TRACER_VERSION_MAJOR 3
-#define LTT_TRACER_VERSION_MINOR 0
+#define CTF_VERSION_MAJOR 0
+#define CTF_VERSION_MINOR 1
+
+/*
+ * Number of milliseconds to retry before failing metadata writes on buffer full
+ * condition. (10 seconds)
+ */
+#define LTTNG_METADATA_TIMEOUT_MSEC 10000
/*
* Size reserved for high priority events (interrupts, NMI, BH) at the end of a