LXR linux/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
   7struct 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
  19enum 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
  46enum target_errno target__validate(struct target *target);
  47enum target_errno target__parse_uid(struct target *target);
  48
  49int target__strerror(struct target *target, int errnum, char *buf, size_t buflen);
  50
  51static inline bool target__has_task(struct target *target)
  52{
  53        return target->tid || target->pid || target->uid_str;
  54}
  55
  56static inline bool target__has_cpu(struct target *target)
  57{
  58        return target->system_wide || target->cpu_list;
  59}
  60
  61static inline bool target__none(struct target *target)
  62{
  63        return !target__has_task(target) && !target__has_cpu(target);
  64}
  65
  66static inline bool target__has_per_thread(struct target *target)
  67{
  68        return target->system_wide && target->per_thread;
  69}
  70
  71static inline bool target__uses_dummy_map(struct target *target)
  72{
  73        bool use_dummy = false;
  74
  75        if (target->default_per_cpu)
  76                use_dummy = target->per_thread ? true : false;
  77        else if (target__has_task(target) ||
  78                 (!target__has_cpu(target) && !target->uses_mmap))
  79                use_dummy = true;
  80        else if (target__has_per_thread(target))
  81                use_dummy = true;
  82
  83        return use_dummy;
  84}
  85
  86#endif /* _PERF_TARGET_H */
  87