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 <fcntl.h>
  10 #include <stdbool.h>
  11 #include <stddef.h>
  12 #include <stdlib.h>
  13 #include <stdarg.h>
  14 #include <linux/compiler.h>
  15 #include <sys/types.h>
  16
  17 /* General helper functions */
  18 void usage(const char *err) __noreturn;
  19 void die(const char *err, ...) __noreturn __printf(1, 2);
  20
  21 static inline void *zalloc(size_t size)
  22 {
  23         return calloc(1, size);
  24 }
  25
  26 #define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
  27
  28 struct dirent;
  29 struct nsinfo;
  30 struct strlist;
  31
  32 int mkdir_p(char *path, mode_t mode);
  33 int rm_rf(const char *path);
  34 int rm_rf_perf_data(const char *path);
  35 struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *));
  36 bool lsdir_no_dot_filter(const char *name, struct dirent *d);
  37 int copyfile(const char *from, const char *to);
  38 int copyfile_mode(const char *from, const char *to, mode_t mode);
  39 int copyfile_ns(const char *from, const char *to, struct nsinfo *nsi);
  40 int copyfile_offset(int ifd, loff_t off_in, int ofd, loff_t off_out, u64 size);
  41
  42 ssize_t readn(int fd, void *buf, size_t n);
  43 ssize_t writen(int fd, const void *buf, size_t n);
  44
  45 size_t hex_width(u64 v);
  46 int hex2u64(const char *ptr, u64 *val);
  47
  48 extern unsigned int page_size;
  49 int __pure cacheline_size(void);
  50
  51 int sysctl__max_stack(void);
  52
  53 int fetch_kernel_version(unsigned int *puint,
  54                          char *str, size_t str_sz);
  55 #define KVER_VERSION(x)         (((x) >> 16) & 0xff)
  56 #define KVER_PATCHLEVEL(x)      (((x) >> 8) & 0xff)
  57 #define KVER_SUBLEVEL(x)        ((x) & 0xff)
  58 #define KVER_FMT        "%d.%d.%d"
  59 #define KVER_PARAM(x)   KVER_VERSION(x), KVER_PATCHLEVEL(x), KVER_SUBLEVEL(x)
  60
  61 const char *perf_tip(const char *dirpath);
  62
  63 #ifndef HAVE_GET_CURRENT_DIR_NAME
  64 char *get_current_dir_name(void);
  65 #endif
  66
  67 #ifndef HAVE_SCHED_GETCPU_SUPPORT
  68 int sched_getcpu(void);
  69 #endif
  70
  71 #ifndef HAVE_SETNS_SUPPORT
  72 int setns(int fd, int nstype);
  73 #endif
  74
  75 extern bool perf_singlethreaded;
  76
  77 void perf_set_singlethreaded(void);
  78 void perf_set_multithreaded(void);
  79
  80 char *perf_exe(char *buf, int len);
  81
  82 #ifndef O_CLOEXEC
  83 #ifdef __sparc__
  84 #define O_CLOEXEC      0x400000
  85 #elif defined(__alpha__) || defined(__hppa__)
  86 #define O_CLOEXEC      010000000
  87 #else
  88 #define O_CLOEXEC      02000000
  89 #endif
  90 #endif
  91
  92 #endif /* GIT_COMPAT_UTIL_H */