package/devel/perf/musl-compat.h

   1 #ifndef __PERF_MUSL_COMPAT_H
   2 #define __PERF_MUSL_COMPAT_H
   3
   4 #ifndef __ASSEMBLER__
   5
   6 #include <sys/ioctl.h>
   7 #include <asm/unistd.h>
   8 #include <unistd.h>
   9 #include <stdio.h>
  10
  11 #undef _IOWR
  12 #undef _IOR
  13 #undef _IOW
  14 #undef _IOC
  15 #undef _IO
  16
  17 #define _SC_LEVEL1_DCACHE_LINESIZE -1
  18
  19 static inline long sysconf_wrap(int name)
  20 {
  21         FILE *f;
  22         int val;
  23
  24         switch (name) {
  25         case _SC_LEVEL1_DCACHE_LINESIZE:
  26                 f = fopen("/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size", "r");
  27                 if (!f)
  28                         return 0;
  29
  30                 if (fscanf(f, "%d", &val) != 1)
  31                         return 0;
  32
  33                 fclose(f);
  34                 return val;
  35         default:
  36                 return sysconf(name);
  37         }
  38 }
  39
  40 #define sysconf(_n) sysconf_wrap(_n)
  41
  42 #endif
  43 #endif