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