text: /*
   * Copyright (C) 2008 The Android Open Source Project
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *  * Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *  * Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #ifndef _SCHED_H_
  #define _SCHED_H_
  
  #include <bits/timespec.h>
  #include <linux/sched.h>
  #include <sys/cdefs.h>
  
  __BEGIN_DECLS
  
  /* This name is used by glibc, but not by the kernel. */
  #define SCHED_OTHER SCHED_NORMAL
  
  struct sched_param {
    int sched_priority;
  };
  
  int sched_setscheduler(pid_t __pid, int __policy, const struct sched_param* __param);
  int sched_getscheduler(pid_t __pid);
  int sched_yield(void);
  int sched_get_priority_max(int __policy);
  int sched_get_priority_min(int __policy);
  int sched_setparam(pid_t __pid, const struct sched_param* __param);
  int sched_getparam(pid_t __pid, struct sched_param* __param);
  int sched_rr_get_interval(pid_t __pid, struct timespec* __quantum);
  
  #if defined(__USE_GNU)
  
  
  #if (defined(__LP64__)) || (defined(__arm__)) || (defined(__i386__) && __ANDROID_API__ >= 17)
  int clone(int (*__fn)(void*), void* __child_stack, int __flags, void* __arg, ...) __INTRODUCED_IN_ARM(9) __INTRODUCED_IN_X86(17);
  #endif /* (defined(__LP64__)) || (defined(__arm__)) || (defined(__i386__) && __ANDROID_API__ >= 17) */
  
  
  #if __ANDROID_API__ >= 17
  int unshare(int __flags) __INTRODUCED_IN(17);
  #endif /* __ANDROID_API__ >= 17 */
  
  int sched_getcpu(void);
  
  #if __ANDROID_API__ >= 21
  int setns(int __fd, int __ns_type) __INTRODUCED_IN(21);
  #endif /* __ANDROID_API__ >= 21 */
  
  
  #ifdef __LP64__
  #define CPU_SETSIZE 1024
  #else
  #define CPU_SETSIZE 32
  #endif
  
  #define __CPU_BITTYPE  unsigned long int  /* mandated by the kernel  */
  #define __CPU_BITS     (8 * sizeof(__CPU_BITTYPE))
  #define __CPU_ELT(x)   ((x) / __CPU_BITS)
  #define __CPU_MASK(x)  ((__CPU_BITTYPE)1 << ((x) & (__CPU_BITS - 1)))
  
  typedef struct {
    __CPU_BITTYPE  __bits[ CPU_SETSIZE / __CPU_BITS ];
  } cpu_set_t;
  
  int sched_setaffinity(pid_t __pid, size_t __set_size, const cpu_set_t* __set);
  int sched_getaffinity(pid_t __pid, size_t __set_size, cpu_set_t* __set);
  
  #define CPU_ZERO(set)          CPU_ZERO_S(sizeof(cpu_set_t), set)
  #define CPU_SET(cpu, set)      CPU_SET_S(cpu, sizeof(cpu_set_t), set)
  #define CPU_CLR(cpu, set)      CPU_CLR_S(cpu, sizeof(cpu_set_t), set)
  #define CPU_ISSET(cpu, set)    CPU_ISSET_S(cpu, sizeof(cpu_set_t), set)
  #define CPU_COUNT(set)         CPU_COUNT_S(sizeof(cpu_set_t), set)
  #define CPU_EQUAL(set1, set2)  CPU_EQUAL_S(sizeof(cpu_set_t), set1, set2)
  
  #define CPU_AND(dst, set1, set2)  __CPU_OP(dst, set1, set2, &)
  #define CPU_OR(dst, set1, set2)   __CPU_OP(dst, set1, set2, |)
  #define CPU_XOR(dst, set1, set2)  __CPU_OP(dst, set1, set2, ^)
  
  #define __CPU_OP(dst, set1, set2, op)  __CPU_OP_S(sizeof(cpu_set_t), dst, set1, set2, op)
  
  /* Support for dynamically-allocated cpu_set_t */
  
  #define CPU_ALLOC_SIZE(count) \
    __CPU_ELT((count) + (__CPU_BITS - 1)) * sizeof(__CPU_BITTYPE)
  
  #define CPU_ALLOC(count)  __sched_cpualloc((count))
  #define CPU_FREE(set)     __sched_cpufree((set))
  
  cpu_set_t* __sched_cpualloc(size_t __count);
  void __sched_cpufree(cpu_set_t* __set);
  
  #define CPU_ZERO_S(setsize, set)  __builtin_memset(set, 0, setsize)
  
  #define CPU_SET_S(cpu, setsize, set) \
    do { \
      size_t __cpu = (cpu); \
      if (__cpu < 8 * (setsize)) \
        (set)->__bits[__CPU_ELT(__cpu)] |= __CPU_MASK(__cpu); \
    } while (0)
  
  #define CPU_CLR_S(cpu, setsize, set) \
    do { \
      size_t __cpu = (cpu); \
      if (__cpu < 8 * (setsize)) \
        (set)->__bits[__CPU_ELT(__cpu)] &= ~__CPU_MASK(__cpu); \
    } while (0)
  
  #define CPU_ISSET_S(cpu, setsize, set) \
    (__extension__ ({ \
      size_t __cpu = (cpu); \
      (__cpu < 8 * (setsize)) \
        ? ((set)->__bits[__CPU_ELT(__cpu)] & __CPU_MASK(__cpu)) != 0 \
        : 0; \
    }))
  
  #define CPU_EQUAL_S(setsize, set1, set2)  (__builtin_memcmp(set1, set2, setsize) == 0)
  
  #define CPU_AND_S(setsize, dst, set1, set2)  __CPU_OP_S(setsize, dst, set1, set2, &)
  #define CPU_OR_S(setsize, dst, set1, set2)   __CPU_OP_S(setsize, dst, set1, set2, |)
  #define CPU_XOR_S(setsize, dst, set1, set2)  __CPU_OP_S(setsize, dst, set1, set2, ^)
  
  #define __CPU_OP_S(setsize, dstset, srcset1, srcset2, op) \
    do { \
      cpu_set_t* __dst = (dstset); \
      const __CPU_BITTYPE* __src1 = (srcset1)->__bits; \
      const __CPU_BITTYPE* __src2 = (srcset2)->__bits; \
      size_t __nn = 0, __nn_max = (setsize)/sizeof(__CPU_BITTYPE); \
      for (; __nn < __nn_max; __nn++) \
        (__dst)->__bits[__nn] = __src1[__nn] op __src2[__nn]; \
    } while (0)
  
  #define CPU_COUNT_S(setsize, set)  __sched_cpucount((setsize), (set))
  
  int __sched_cpucount(size_t __set_size, const cpu_set_t* __set);
  
  #endif /* __USE_GNU */
  
  __END_DECLS
  
  #endif /* _SCHED_H_ */
  