tools/perf/util/util.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef GIT_COMPAT_UTIL_H
   3 #define GIT_COMPAT_UTIL_H
   4
   5 #define _BSD_SOURCE 1
   6 /* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */
   7 #define _DEFAULT_SOURCE 1
   8
   9 #include <stdbool.h>
  10 #include <stddef.h>
  11 #include <stdlib.h>
  12 #include <stdarg.h>
  13 #include <linux/compiler.h>
  14 #include <sys/types.h>
  15
  16 /* General helper functions */
  17 void usage(const char *err) __noreturn;
  18 void die(const char *err, ...) __noreturn __printf(1, 2);
  19
  20 static inline void *zalloc(size_t size)
  21 {
  22         return calloc(1, size);
  23 }
  24
  25 #define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
  26
  27 struct dirent;
  28 struct nsinfo;
  29 struct strlist;
  30
  31 int mkdir_p(char *path, mode_t mode);
  32 int rm_rf(const char *path);
  33 struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *));
  34 bool lsdir_no_dot_filter(const char *name, struct dirent *d);
  35 int copyfile(const char *from, const char *to);
  36 int copyfile_mode(const char *from, const char *to, mode_t mode);
  37 int copyfile_ns(const char *from, const char *to, struct nsinfo *nsi);
  38
  39 ssize_t readn(int fd, void *buf, size_t n);
  40 ssize_t writen(int fd, const void *buf, size_t n);
  41
  42 size_t hex_width(u64 v);
  43 int hex2u64(const char *ptr, u64 *val);
  44
  45 extern unsigned int page_size;
  46 int __pure cacheline_size(void);
  47
  48 int sysctl__max_stack(void);
  49
  50 int fetch_kernel_version(unsigned int *puint,
  51                          char *str, size_t str_sz);
  52 #define KVER_VERSION(x)         (((x) >> 16) & 0xff)
  53 #define KVER_PATCHLEVEL(x)      (((x) >> 8) & 0xff)
  54 #define KVER_SUBLEVEL(x)        ((x) & 0xff)
  55 #define KVER_FMT        "%d.%d.%d"
  56 #define KVER_PARAM(x)   KVER_VERSION(x), KVER_PATCHLEVEL(x), KVER_SUBLEVEL(x)
  57
  58 const char *perf_tip(const char *dirpath);
  59
  60 #ifndef HAVE_SCHED_GETCPU_SUPPORT
  61 int sched_getcpu(void);
  62 #endif
  63
  64 #ifndef HAVE_SETNS_SUPPORT
  65 int setns(int fd, int nstype);
  66 #endif
  67
  68 extern bool perf_singlethreaded;
  69
  70 void perf_set_singlethreaded(void);
  71 void perf_set_multithreaded(void);
  72
  73 #ifndef O_CLOEXEC
  74 #ifdef __sparc__
  75 #define O_CLOEXEC      0x400000
  76 #elif defined(__alpha__) || defined(__hppa__)
  77 #define O_CLOEXEC      010000000
  78 #else
  79 #define O_CLOEXEC      02000000
  80 #endif
  81 #endif
  82
  83 #endif /* GIT_COMPAT_UTIL_H */