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 <string.h>
   8 #include <unistd.h>
   9 #include <stdio.h>
  10 #include <syscall.h>
  11 #include <sched.h>
  12
  13 #undef _IOWR
  14 #undef _IOR
  15 #undef _IOW
  16 #undef _IOC
  17 #undef _IO
  18
  19 /* Change XSI compliant version into GNU extension hackery */
  20 static inline char *
  21 gnu_strerror_r(int err, char *buf, size_t buflen)
  22 {
  23         if (strerror_r(err, buf, buflen))
  24                 return NULL;
  25         return buf;
  26 }
  27 #define strerror_r gnu_strerror_r
  28
  29 #define _SC_LEVEL1_DCACHE_LINESIZE -1
  30
  31 static inline long sysconf_wrap(int name)
  32 {
  33         FILE *f;
  34         int val;
  35
  36         switch (name) {
  37         case _SC_LEVEL1_DCACHE_LINESIZE:
  38                 f = fopen("/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size", "r");
  39                 if (!f)
  40                         return 0;
  41
  42                 if (fscanf(f, "%d", &val) != 1)
  43                         return 0;
  44
  45                 fclose(f);
  46                 return val;
  47         default:
  48                 return sysconf(name);
  49         }
  50 }
  51
  52 #define sysconf(_n) sysconf_wrap(_n)
  53
  54 static inline int compat_sched_getcpu(void)
  55 {
  56 #ifdef __NR_getcpu
  57         unsigned int val;
  58
  59         if (syscall(__NR_getcpu, &val))
  60                 return -1;
  61
  62         return val;
  63 #else
  64         return -1;
  65 #endif
  66 }
  67
  68 #define sched_getcpu compat_sched_getcpu
  69
  70 #endif
  71 #endif