tools/perf/util/cpu-set-sched.h

   1 // SPDX-License-Identifier: LGPL-2.1
   2 // Definitions taken from glibc for use with older systems, same licensing.
   3 #ifndef _CPU_SET_SCHED_PERF_H
   4 #define _CPU_SET_SCHED_PERF_H
   5
   6 #include <features.h>
   7 #include <sched.h>
   8
   9 #ifndef CPU_EQUAL
  10 #ifndef __CPU_EQUAL_S
  11 #if __GNUC_PREREQ (2, 91)
  12 # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
  13   (__builtin_memcmp (cpusetp1, cpusetp2, setsize) == 0)
  14 #else
  15 # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
  16   (__extension__                                                              \
  17    ({ const __cpu_mask *__arr1 = (cpusetp1)->__bits;                          \
  18       const __cpu_mask *__arr2 = (cpusetp2)->__bits;                          \
  19       size_t __imax = (setsize) / sizeof (__cpu_mask);                        \
  20       size_t __i;                                                             \
  21       for (__i = 0; __i < __imax; ++__i)                                      \
  22         if (__arr1[__i] != __arr2[__i])                                       \
  23           break;                                                              \
  24       __i == __imax; }))
  25 #endif
  26 #endif // __CPU_EQUAL_S
  27
  28 #define CPU_EQUAL(cpusetp1, cpusetp2) \
  29   __CPU_EQUAL_S (sizeof (cpu_set_t), cpusetp1, cpusetp2)
  30 #endif // CPU_EQUAL
  31
  32 #ifndef CPU_OR
  33 #ifndef __CPU_OP_S
  34 #define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \
  35   (__extension__                                                              \
  36    ({ cpu_set_t *__dest = (destset);                                          \
  37       const __cpu_mask *__arr1 = (srcset1)->__bits;                           \
  38       const __cpu_mask *__arr2 = (srcset2)->__bits;                           \
  39       size_t __imax = (setsize) / sizeof (__cpu_mask);                        \
  40       size_t __i;                                                             \
  41       for (__i = 0; __i < __imax; ++__i)                                      \
  42         ((__cpu_mask *) __dest->__bits)[__i] = __arr1[__i] op __arr2[__i];    \
  43       __dest; }))
  44 #endif // __CPU_OP_S
  45
  46 #define CPU_OR(destset, srcset1, srcset2) \
  47   __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, |)
  48 #endif // CPU_OR
  49
  50 #endif // _CPU_SET_SCHED_PERF_H