100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/* sys/cpuset.h
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _SYS_CPUSET_H_
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#define _SYS_CPUSET_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef __SIZE_TYPE__ __cpu_mask;
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#define __CPU_SETSIZE 1024 // maximum number of logical processors tracked
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#define __NCPUBITS (8 * sizeof (__cpu_mask)) // max size of processor group
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#define __CPU_GROUPMAX (__CPU_SETSIZE / __NCPUBITS) // maximum group number
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#define __CPUELT(cpu) ((cpu) / __NCPUBITS)
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#define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS))
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typedef struct
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{
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__cpu_mask __bits[__CPU_GROUPMAX];
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} cpu_set_t;
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#if __GNU_VISIBLE
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int __sched_getaffinity_sys (pid_t, size_t, cpu_set_t *);
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/* These macros alloc or free dynamically-sized cpu sets of size 'num' cpus.
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Allocations are padded such that full-word operations can be done easily. */
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#define CPU_ALLOC_SIZE(num) ((num+__NCPUBITS-1) / __NCPUBITS) * sizeof (__cpu_mask)
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#define CPU_ALLOC(num) __builtin_malloc (CPU_ALLOC_SIZE(num))
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#define CPU_FREE(set) __builtin_free (set)
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/* These _S macros operate on dynamically-sized cpu sets of size 'siz' bytes */
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#define CPU_ZERO_S(siz, set) __builtin_memset (set, 0, siz)
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#define CPU_SET_S(cpu,siz,set) \
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if (cpu < 8 * siz) \
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(set)->__bits[__CPUELT(cpu)] |= __CPUMASK(cpu);
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#define CPU_CLR_S(cpu,siz,set) \
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if (cpu < 8 * siz) \
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(set)->__bits[__CPUELT(cpu)] &= ~(__CPUMASK(cpu));
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#define CPU_ISSET_S(cpu,siz,set) \
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({int res = 0; \
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if (cpu < 8 * siz) \
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res = !!((set)->__bits[__CPUELT(cpu)] & __CPUMASK(cpu)); \
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res;})
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#define CPU_COUNT_S(siz, set) \
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({int tot = 0;\
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for (int i = 0; i < siz / sizeof (__cpu_mask); i++) \
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tot += __builtin_popcountl ((set)->__bits[i]); \
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tot;})
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#define CPU_AND_S(siz, dst, src1, src2) \
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for (int i = 0; i < siz / sizeof (__cpu_mask); i++) \
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(dst)->__bits[i] = (src1)->__bits[i] & (src2)->__bits[i];
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#define CPU_OR_S(siz, dst, src1, src2) \
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for (int i = 0; i < siz / sizeof (__cpu_mask); i++) \
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(dst)->__bits[i] = (src1)->__bits[i] | (src2)->__bits[i];
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#define CPU_XOR_S(siz, dst, src1, src2) \
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for (int i = 0; i < siz / sizeof (__cpu_mask); i++) \
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(dst)->__bits[i] = (src1)->__bits[i] ^ (src2)->__bits[i];
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#define CPU_EQUAL_S(siz, src1, src2) \
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({int res = 1; \
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for (int i = 0; res && i < siz / sizeof (__cpu_mask); i++) \
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res &= (src1)->__bits[i] == (src2)->__bits[i]; \
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res;})
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/* These macros operate on fixed-size cpu sets of size __CPU_SETSIZE cpus */
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#define CPU_ZERO(set) CPU_ZERO_S(sizeof (cpu_set_t), set)
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#define CPU_SET(cpu, set) CPU_SET_S(cpu, sizeof (cpu_set_t), set)
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#define CPU_CLR(cpu, set) CPU_CLR_S(cpu, sizeof (cpu_set_t), set)
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#define CPU_ISSET(cpu, set) CPU_ISSET_S(cpu, sizeof (cpu_set_t), set)
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#define CPU_COUNT(set) CPU_COUNT_S(sizeof (cpu_set_t), set)
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#define CPU_AND(dst, src1, src2) CPU_AND_S(sizeof (cpu_set_t), dst, src1, src2)
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#define CPU_OR(dst, src1, src2) CPU_OR_S(sizeof (cpu_set_t), dst, src1, src2)
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#define CPU_XOR(dst, src1, src2) CPU_XOR_S(sizeof (cpu_set_t), dst, src1, src2)
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#define CPU_EQUAL(src1, src2) CPU_EQUAL_S(sizeof (cpu_set_t), src1, src2)
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#define CPU_SETSIZE __CPU_SETSIZE
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#endif /* __GNU_VISIBLE */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_CPUSET_H_ */
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