package/devel/perf/musl-compat.h

   1 #ifndef __PERF_MUSL_COMPAT_H
   2 #define __PERF_MUSL_COMPAT_H
   3
   4 #include <sys/ioctl.h>
   5 #include <string.h>
   6 #include <unistd.h>
   7 #include <stdio.h>
   8 #include <syscall.h>
   9 #include <sched.h>
  10
  11 #undef _IOWR
  12 #undef _IOR
  13 #undef _IOW
  14 #undef _IOC
  15 #undef _IO
  16
  17 /* Change XSI compliant version into GNU extension hackery */
  18 #define strerror_r(err, buf, buflen) \
  19         (strerror_r(err, buf, buflen) ? NULL : buf)
  20
  21 #define _SC_LEVEL1_DCACHE_LINESIZE -1
  22
  23 static inline long sysconf_wrap(int name)
  24 {
  25         FILE *f;
  26         int val;
  27
  28         switch (name) {
  29         case _SC_LEVEL1_DCACHE_LINESIZE:
  30                 f = fopen("/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size", "r");
  31                 if (!f)
  32                         return 0;
  33
  34                 if (fscanf(f, "%d", &val) != 1)
  35                         return 0;
  36
  37                 fclose(f);
  38                 return val;
  39         default:
  40                 return sysconf(name);
  41         }
  42 }
  43
  44 #define sysconf(_n) sysconf_wrap(_n)
  45
  46 static inline int compat_sched_getcpu(void)
  47 {
  48 #ifdef __NR_getcpu
  49         unsigned int val;
  50
  51         if (syscall(__NR_getcpu, &val))
  52                 return -1;
  53
  54         return val;
  55 #else
  56         return -1;
  57 #endif
  58 }
  59
  60 #define sched_getcpu compat_sched_getcpu
  61
  62 #endif