root/tools/perf/util/mmap.h

INCLUDED FROM

DEFINITIONS

1. perf_mmap__read_head
2. perf_mmap__write_tail

   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 
  17 struct 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  */
  23 struct 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 
  39 struct mmap_params {
  40         int prot, mask, nr_cblocks, affinity, flush, comp_level;
  41         struct auxtrace_mmap_params auxtrace_mp;
  42 };
  43 
  44 int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
  45 void perf_mmap__munmap(struct mmap *map);
  46 
  47 void perf_mmap__get(struct mmap *map);
  48 void perf_mmap__put(struct mmap *map);
  49 
  50 void perf_mmap__consume(struct mmap *map);
  51 
  52 static inline u64 perf_mmap__read_head(struct mmap *mm)
  53 {
  54         return ring_buffer_read_head(mm->core.base);
  55 }
  56 
  57 static inline void perf_mmap__write_tail(struct mmap *md, u64 tail)
  58 {
  59         ring_buffer_write_tail(md->core.base, tail);
  60 }
  61 
  62 union perf_event *perf_mmap__read_forward(struct mmap *map);
  63 
  64 union perf_event *perf_mmap__read_event(struct mmap *map);
  65 
  66 int perf_mmap__push(struct mmap *md, void *to,
  67                     int push(struct mmap *map, void *to, void *buf, size_t size));
  68 
  69 size_t perf_mmap__mmap_len(struct mmap *map);
  70 
  71 int perf_mmap__read_init(struct mmap *md);
  72 void perf_mmap__read_done(struct mmap *map);
  73 #endif /*__PERF_MMAP_H */