1#ifndef __PERF_MMAP_H
 2#define __PERF_MMAP_H 1
 3
 4#include <internal/mmap.h>
 5#include <linux/compiler.h>
 6#include <linux/refcount.h>
 7#include <linux/types.h>
 8#include <linux/ring_buffer.h>
 9#include <stdbool.h>
10#include <pthread.h> // for cpu_set_t
11#ifdef HAVE_AIO_SUPPORT
12#include <aio.h>
13#endif
14#include "auxtrace.h"
15#include "event.h"
16
17struct aiocb;
18/**
19 * struct mmap - perf's ring buffer mmap details
20 *
21 * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
22 */
23struct mmap {
24	struct perf_mmap	core;
25	struct auxtrace_mmap auxtrace_mmap;
26#ifdef HAVE_AIO_SUPPORT
27	struct {
28		void		 **data;
29		struct aiocb	 *cblocks;
30		struct aiocb	 **aiocb;
31		int		 nr_cblocks;
32	} aio;
33#endif
34	cpu_set_t	affinity_mask;
35	void		*data;
36	int		comp_level;
37};
38
39struct mmap_params {
40	int prot, mask, nr_cblocks, affinity, flush, comp_level;
41	struct auxtrace_mmap_params auxtrace_mp;
42};
43
44int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
45void perf_mmap__munmap(struct mmap *map);
46
47void perf_mmap__get(struct mmap *map);
48void perf_mmap__put(struct mmap *map);
49
50void perf_mmap__consume(struct mmap *map);
51
52static inline u64 perf_mmap__read_head(struct mmap *mm)
53{
54	return ring_buffer_read_head(mm->core.base);
55}
56
57static inline void perf_mmap__write_tail(struct mmap *md, u64 tail)
58{
59	ring_buffer_write_tail(md->core.base, tail);
60}
61
62union perf_event *perf_mmap__read_forward(struct mmap *map);
63
64union perf_event *perf_mmap__read_event(struct mmap *map);
65
66int perf_mmap__push(struct mmap *md, void *to,
67		    int push(struct mmap *map, void *to, void *buf, size_t size));
68
69size_t perf_mmap__mmap_len(struct mmap *map);
70
71int perf_mmap__read_init(struct mmap *md);
72void perf_mmap__read_done(struct mmap *map);
73#endif /*__PERF_MMAP_H */