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/*
* Simple trace backend
*
* Copyright IBM, Corp. 2010
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#ifndef TRACE_SIMPLE_H
#define TRACE_SIMPLE_H
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
typedef uint64_t TraceEventID;
typedef struct {
const char *tp_name;
bool state;
} TraceEvent;
void st_print_trace_file_status(FILE *stream, fprintf_function stream_printf);
void st_set_trace_file_enabled(bool enable);
bool st_set_trace_file(const char *file);
void st_flush_trace_buffer(void);
typedef struct {
unsigned int tbuf_idx;
unsigned int next_tbuf_idx;
unsigned int rec_off;
} TraceBufferRecord;
/* Note for hackers: Make sure MAX_TRACE_LEN < sizeof(uint32_t) */
#define MAX_TRACE_STRLEN 512
/**
* Initialize a trace record and claim space for it in the buffer
*
* @arglen number of bytes required for arguments
*/
int trace_record_start(TraceBufferRecord *rec, TraceEventID id, size_t arglen);
/**
* Append a 64-bit argument to a trace record
*/
void trace_record_write_u64(TraceBufferRecord *rec, uint64_t val);
/**
* Append a string argument to a trace record
*/
void trace_record_write_str(TraceBufferRecord *rec, const char *s, uint32_t slen);
/**
* Mark a trace record completed
*
* Don't append any more arguments to the trace record after calling this.
*/
void trace_record_finish(TraceBufferRecord *rec);
#endif /* TRACE_SIMPLE_H */
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