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/*
* Copyright (c) 2022 Amazon.com, Inc. or its affiliates. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _WINDOWS_SCHED_H_
#define _WINDOWS_SCHED_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <windows.h>
#include <processthreadsapi.h>
#include "osd.h"
/* Type for array elements in 'cpu_set_t'. */
typedef unsigned long int __cpu_mask;
/* Size definition for CPU sets. */
#define __CPU_SETSIZE 1024
#define __NCPUBITS (8 * sizeof (__cpu_mask))
/* Data structure to describe CPU mask. */
typedef struct cpu_set_s
{
__cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS];
} cpu_set_t;
/* Basic access functions. */
#define __CPUELT(cpu) ((cpu) / __NCPUBITS)
#define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS))
#define CPU_ZERO(cpusetp) __CPU_ZERO_S(sizeof(cpu_set_t), cpusetp)
#define CPU_SET(cpu, cpusetp) __CPU_SET_S(cpu, sizeof(cpu_set_t), cpusetp)
#define __CPU_ZERO_S(setsize, cpusetp) \
do { \
size_t __i; \
size_t __imax = (setsize) / sizeof(__cpu_mask); \
__cpu_mask *__bits = (cpusetp)->__bits; \
for (__i = 0; __i < __imax; ++__i) \
__bits[__i] = 0; \
} while (0)
#define __CPU_SET_S(cpu, setsize, cpusetp) \
size_t __cpu = (cpu); \
__cpu < 8 * (setsize) \
? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \
|= __CPUMASK (__cpu)) \
: 0;
static inline int sched_setaffinity(pid_t pid, size_t cpusetsize, cpu_set_t *mask)
{
HANDLE process_handle;
if (cpusetsize == 0 || mask == NULL)
return -1;
process_handle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);
if (process_handle == NULL)
return -1;
if (SetProcessAffinityMask(process_handle, *mask->__bits) == 0) {
CloseHandle(process_handle);
return -1;
}
return 0;
}
static inline int sched_yield(void)
{
(void) SwitchToThread();
return 0;
}
#ifdef __cplusplus
}
#endif
#endif /* _WINDOWS_SCHED_H_ */
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