tools/perf/util/data.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __PERF_DATA_H
   3 #define __PERF_DATA_H
   4
   5 #include <stdio.h>
   6 #include <stdbool.h>
   7
   8 enum perf_data_mode {
   9         PERF_DATA_MODE_WRITE,
  10         PERF_DATA_MODE_READ,
  11 };
  12
  13 enum perf_dir_version {
  14         PERF_DIR_SINGLE_FILE    = 0,
  15         PERF_DIR_VERSION        = 1,
  16 };
  17
  18 struct perf_data_file {
  19         char            *path;
  20         union {
  21                 int      fd;
  22                 FILE    *fptr;
  23         };
  24         unsigned long    size;
  25 };
  26
  27 struct perf_data {
  28         const char              *path;
  29         struct perf_data_file    file;
  30         bool                     is_pipe;
  31         bool                     is_dir;
  32         bool                     force;
  33         bool                     use_stdio;
  34         enum perf_data_mode      mode;
  35
  36         struct {
  37                 u64                      version;
  38                 struct perf_data_file   *files;
  39                 int                      nr;
  40         } dir;
  41 };
  42
  43 static inline bool perf_data__is_read(struct perf_data *data)
  44 {
  45         return data->mode == PERF_DATA_MODE_READ;
  46 }
  47
  48 static inline bool perf_data__is_write(struct perf_data *data)
  49 {
  50         return data->mode == PERF_DATA_MODE_WRITE;
  51 }
  52
  53 static inline int perf_data__is_pipe(struct perf_data *data)
  54 {
  55         return data->is_pipe;
  56 }
  57
  58 static inline bool perf_data__is_dir(struct perf_data *data)
  59 {
  60         return data->is_dir;
  61 }
  62
  63 static inline bool perf_data__is_single_file(struct perf_data *data)
  64 {
  65         return data->dir.version == PERF_DIR_SINGLE_FILE;
  66 }
  67
  68 static inline int perf_data__fd(struct perf_data *data)
  69 {
  70         if (data->use_stdio)
  71                 return fileno(data->file.fptr);
  72
  73         return data->file.fd;
  74 }
  75
  76 int perf_data__open(struct perf_data *data);
  77 void perf_data__close(struct perf_data *data);
  78 ssize_t perf_data__read(struct perf_data *data, void *buf, size_t size);
  79 ssize_t perf_data__write(struct perf_data *data,
  80                               void *buf, size_t size);
  81 ssize_t perf_data_file__write(struct perf_data_file *file,
  82                               void *buf, size_t size);
  83 /*
  84  * If at_exit is set, only rename current perf.data to
  85  * perf.data.<postfix>, continue write on original data.
  86  * Set at_exit when flushing the last output.
  87  *
  88  * Return value is fd of new output.
  89  */
  90 int perf_data__switch(struct perf_data *data,
  91                            const char *postfix,
  92                            size_t pos, bool at_exit, char **new_filepath);
  93
  94 int perf_data__create_dir(struct perf_data *data, int nr);
  95 int perf_data__open_dir(struct perf_data *data);
  96 void perf_data__close_dir(struct perf_data *data);
  97 int perf_data__update_dir(struct perf_data *data);
  98 unsigned long perf_data__size(struct perf_data *data);
  99 int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz);
 100 char *perf_data__kallsyms_name(struct perf_data *data);
 101 bool is_perf_data(const char *path);
 102 #endif /* __PERF_DATA_H */