libc-top-half/musl/include/sched.h

   1 #ifndef _SCHED_H
   2 #define _SCHED_H
   3 #ifdef __cplusplus
   4 extern "C" {
   5 #endif
   6
   7 #include <features.h>
   8
   9 #define __NEED_struct_timespec
  10 #define __NEED_pid_t
  11 #define __NEED_time_t
  12
  13 #ifdef _GNU_SOURCE
  14 #define __NEED_size_t
  15 #endif
  16
  17 #include <bits/alltypes.h>
  18
  19 #ifdef __wasilibc_unmodified_upstream /* WASI has no CPU scheduling support. */
  20 struct sched_param {
  21         int sched_priority;
  22         int __reserved1;
  23 #if _REDIR_TIME64
  24         long __reserved2[4];
  25 #else
  26         struct {
  27                 time_t __reserved1;
  28                 long __reserved2;
  29         } __reserved2[2];
  30 #endif
  31         int __reserved3;
  32 };
  33
  34 int    sched_get_priority_max(int);
  35 int    sched_get_priority_min(int);
  36 int    sched_getparam(pid_t, struct sched_param *);
  37 int    sched_getscheduler(pid_t);
  38 int    sched_rr_get_interval(pid_t, struct timespec *);
  39 int    sched_setparam(pid_t, const struct sched_param *);
  40 int    sched_setscheduler(pid_t, int, const struct sched_param *);
  41 #endif
  42 int     sched_yield(void);
  43
  44 #ifdef __wasilibc_unmodified_upstream /* WASI has no CPU scheduling support. */
  45 #define SCHED_OTHER 0
  46 #define SCHED_FIFO 1
  47 #define SCHED_RR 2
  48 #define SCHED_BATCH 3
  49 #define SCHED_IDLE 5
  50 #define SCHED_DEADLINE 6
  51 #define SCHED_RESET_ON_FORK 0x40000000
  52
  53 #ifdef _GNU_SOURCE
  54 #define CSIGNAL         0x000000ff
  55 #define CLONE_NEWTIME   0x00000080
  56 #define CLONE_VM        0x00000100
  57 #define CLONE_FS        0x00000200
  58 #define CLONE_FILES     0x00000400
  59 #define CLONE_SIGHAND   0x00000800
  60 #define CLONE_PIDFD     0x00001000
  61 #define CLONE_PTRACE    0x00002000
  62 #define CLONE_VFORK     0x00004000
  63 #define CLONE_PARENT    0x00008000
  64 #define CLONE_THREAD    0x00010000
  65 #define CLONE_NEWNS     0x00020000
  66 #define CLONE_SYSVSEM   0x00040000
  67 #define CLONE_SETTLS    0x00080000
  68 #define CLONE_PARENT_SETTID     0x00100000
  69 #define CLONE_CHILD_CLEARTID    0x00200000
  70 #define CLONE_DETACHED  0x00400000
  71 #define CLONE_UNTRACED  0x00800000
  72 #define CLONE_CHILD_SETTID      0x01000000
  73 #define CLONE_NEWCGROUP 0x02000000
  74 #define CLONE_NEWUTS    0x04000000
  75 #define CLONE_NEWIPC    0x08000000
  76 #define CLONE_NEWUSER   0x10000000
  77 #define CLONE_NEWPID    0x20000000
  78 #define CLONE_NEWNET    0x40000000
  79 #define CLONE_IO        0x80000000
  80 int clone (int (*)(void *), void *, int, void *, ...);
  81 int unshare(int);
  82 int setns(int, int);
  83
  84 void *memcpy(void *__restrict, const void *__restrict, size_t);
  85 int memcmp(const void *, const void *, size_t);
  86 void *memset (void *, int, size_t);
  87 void *calloc(size_t, size_t);
  88 void free(void *);
  89
  90 typedef struct cpu_set_t { unsigned long __bits[128/sizeof(long)]; } cpu_set_t;
  91 int __sched_cpucount(size_t, const cpu_set_t *);
  92 int sched_getcpu(void);
  93 int sched_getaffinity(pid_t, size_t, cpu_set_t *);
  94 int sched_setaffinity(pid_t, size_t, const cpu_set_t *);
  95
  96 #define __CPU_op_S(i, size, set, op) ( (i)/8U >= (size) ? 0 : \
  97         (((unsigned long *)(set))[(i)/8/sizeof(long)] op (1UL<<((i)%(8*sizeof(long))))) )
  98
  99 #define CPU_SET_S(i, size, set) __CPU_op_S(i, size, set, |=)
 100 #define CPU_CLR_S(i, size, set) __CPU_op_S(i, size, set, &=~)
 101 #define CPU_ISSET_S(i, size, set) __CPU_op_S(i, size, set, &)
 102
 103 #define __CPU_op_func_S(func, op) \
 104 static __inline void __CPU_##func##_S(size_t __size, cpu_set_t *__dest, \
 105         const cpu_set_t *__src1, const cpu_set_t *__src2) \
 106 { \
 107         size_t __i; \
 108         for (__i=0; __i<__size/sizeof(long); __i++) \
 109                 ((unsigned long *)__dest)[__i] = ((unsigned long *)__src1)[__i] \
 110                         op ((unsigned long *)__src2)[__i] ; \
 111 }
 112
 113 __CPU_op_func_S(AND, &)
 114 __CPU_op_func_S(OR, |)
 115 __CPU_op_func_S(XOR, ^)
 116
 117 #define CPU_AND_S(a,b,c,d) __CPU_AND_S(a,b,c,d)
 118 #define CPU_OR_S(a,b,c,d) __CPU_OR_S(a,b,c,d)
 119 #define CPU_XOR_S(a,b,c,d) __CPU_XOR_S(a,b,c,d)
 120
 121 #define CPU_COUNT_S(size,set) __sched_cpucount(size,set)
 122 #define CPU_ZERO_S(size,set) memset(set,0,size)
 123 #define CPU_EQUAL_S(size,set1,set2) (!memcmp(set1,set2,size))
 124
 125 #define CPU_ALLOC_SIZE(n) (sizeof(long) * ( (n)/(8*sizeof(long)) \
 126         + ((n)%(8*sizeof(long)) + 8*sizeof(long)-1)/(8*sizeof(long)) ) )
 127 #define CPU_ALLOC(n) ((cpu_set_t *)calloc(1,CPU_ALLOC_SIZE(n)))
 128 #define CPU_FREE(set) free(set)
 129
 130 #define CPU_SETSIZE 128
 131
 132 #define CPU_SET(i, set) CPU_SET_S(i,sizeof(cpu_set_t),set)
 133 #define CPU_CLR(i, set) CPU_CLR_S(i,sizeof(cpu_set_t),set)
 134 #define CPU_ISSET(i, set) CPU_ISSET_S(i,sizeof(cpu_set_t),set)
 135 #define CPU_AND(d,s1,s2) CPU_AND_S(sizeof(cpu_set_t),d,s1,s2)
 136 #define CPU_OR(d,s1,s2) CPU_OR_S(sizeof(cpu_set_t),d,s1,s2)
 137 #define CPU_XOR(d,s1,s2) CPU_XOR_S(sizeof(cpu_set_t),d,s1,s2)
 138 #define CPU_COUNT(set) CPU_COUNT_S(sizeof(cpu_set_t),set)
 139 #define CPU_ZERO(set) CPU_ZERO_S(sizeof(cpu_set_t),set)
 140 #define CPU_EQUAL(s1,s2) CPU_EQUAL_S(sizeof(cpu_set_t),s1,s2)
 141
 142 #endif
 143 #endif
 144
 145 #if _REDIR_TIME64
 146 __REDIR(sched_rr_get_interval, __sched_rr_get_interval_time64);
 147 #endif
 148
 149 #ifdef __cplusplus
 150 }
 151 #endif
 152 #endif