tools/perf/util/target.h

   1 #ifndef _PERF_TARGET_H
   2 #define _PERF_TARGET_H
   3
   4 #include <stdbool.h>
   5 #include <sys/types.h>
   6
   7 struct target {
   8         const char   *pid;
   9         const char   *tid;
  10         const char   *cpu_list;
  11         const char   *uid_str;
  12         uid_t        uid;
  13         bool         system_wide;
  14         bool         uses_mmap;
  15         bool         default_per_cpu;
  16         bool         per_thread;
  17 };
  18
  19 enum target_errno {
  20         TARGET_ERRNO__SUCCESS           = 0,
  21
  22         /*
  23          * Choose an arbitrary negative big number not to clash with standard
  24          * errno since SUS requires the errno has distinct positive values.
  25          * See 'Issue 6' in the link below.
  26          *
  27          * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
  28          */
  29         __TARGET_ERRNO__START           = -10000,
  30
  31         /* for target__validate() */
  32         TARGET_ERRNO__PID_OVERRIDE_CPU  = __TARGET_ERRNO__START,
  33         TARGET_ERRNO__PID_OVERRIDE_UID,
  34         TARGET_ERRNO__UID_OVERRIDE_CPU,
  35         TARGET_ERRNO__PID_OVERRIDE_SYSTEM,
  36         TARGET_ERRNO__UID_OVERRIDE_SYSTEM,
  37         TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD,
  38
  39         /* for target__parse_uid() */
  40         TARGET_ERRNO__INVALID_UID,
  41         TARGET_ERRNO__USER_NOT_FOUND,
  42
  43         __TARGET_ERRNO__END,
  44 };
  45
  46 enum target_errno target__validate(struct target *target);
  47 enum target_errno target__parse_uid(struct target *target);
  48
  49 int target__strerror(struct target *target, int errnum, char *buf, size_t buflen);
  50
  51 static inline bool target__has_task(struct target *target)
  52 {
  53         return target->tid || target->pid || target->uid_str;
  54 }
  55
  56 static inline bool target__has_cpu(struct target *target)
  57 {
  58         return target->system_wide || target->cpu_list;
  59 }
  60
  61 static inline bool target__none(struct target *target)
  62 {
  63         return !target__has_task(target) && !target__has_cpu(target);
  64 }
  65
  66 static inline bool target__uses_dummy_map(struct target *target)
  67 {
  68         bool use_dummy = false;
  69
  70         if (target->default_per_cpu)
  71                 use_dummy = target->per_thread ? true : false;
  72         else if (target__has_task(target) ||
  73                  (!target__has_cpu(target) && !target->uses_mmap))
  74                 use_dummy = true;
  75
  76         return use_dummy;
  77 }
  78
  79 #endif /* _PERF_TARGET_H */