Provide the missing LIBUSB_LOG_LEVEL_* for older libusb or FreeBSD. Providing just...
[qemu.git] / trace / simple.h
1 /*
2 * Simple trace backend
3 *
4 * Copyright IBM, Corp. 2010
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2. See
7 * the COPYING file in the top-level directory.
8 *
9 */
10
11 #ifndef TRACE_SIMPLE_H
12 #define TRACE_SIMPLE_H
13
14 #include <stdint.h>
15 #include <stdbool.h>
16 #include <stdio.h>
17
18 #include "trace/generated-events.h"
19
20
21 void st_print_trace_file_status(FILE *stream, fprintf_function stream_printf);
22 void st_set_trace_file_enabled(bool enable);
23 bool st_set_trace_file(const char *file);
24 bool st_init(const char *file);
25 void st_flush_trace_buffer(void);
26
27 typedef struct {
28 unsigned int tbuf_idx;
29 unsigned int rec_off;
30 } TraceBufferRecord;
31
32 /* Note for hackers: Make sure MAX_TRACE_LEN < sizeof(uint32_t) */
33 #define MAX_TRACE_STRLEN 512
34 /**
35 * Initialize a trace record and claim space for it in the buffer
36 *
37 * @arglen number of bytes required for arguments
38 */
39 int trace_record_start(TraceBufferRecord *rec, TraceEventID id, size_t arglen);
40
41 /**
42 * Append a 64-bit argument to a trace record
43 */
44 void trace_record_write_u64(TraceBufferRecord *rec, uint64_t val);
45
46 /**
47 * Append a string argument to a trace record
48 */
49 void trace_record_write_str(TraceBufferRecord *rec, const char *s, uint32_t slen);
50
51 /**
52 * Mark a trace record completed
53 *
54 * Don't append any more arguments to the trace record after calling this.
55 */
56 void trace_record_finish(TraceBufferRecord *rec);
57
58 #endif /* TRACE_SIMPLE_H */