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VILLASnode/common/include/villas/cpuset.hpp
Steffen Vogel 7d10544d79 Apply clang-format changes
Signed-off-by: Steffen Vogel <steffen.vogel@opal-rt.com>
2024-02-29 18:58:07 +01:00

126 lines
2.6 KiB
C++

/* Human readable cpusets.
*
* Author: Steffen Vogel <post@steffenvogel.de>
* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#ifdef __linux__
#include <cstdint>
#include <sched.h>
#include <villas/exceptions.hpp>
namespace villas {
namespace utils {
class CpuSet {
protected:
cpu_set_t *setp;
unsigned num_cpus;
size_t sz;
public:
CpuSet() : num_cpus(sizeof(uintmax_t) * 8), sz(CPU_ALLOC_SIZE(num_cpus)) {
setp = CPU_ALLOC(num_cpus);
if (!setp)
throw MemoryAllocationError();
zero();
}
// Parses string with list of CPU ranges.
//
// @param str Human readable representation of the set.
CpuSet(const std::string &str);
CpuSet(const char *str);
// Convert integer to cpu_set_t.
//
// @param set An integer number which is used as the mask
CpuSet(uintmax_t set);
// Convert cpu_set_t to an integer. */
operator uintmax_t();
operator const cpu_set_t *() { return setp; }
// Returns human readable representation of the cpuset.
//
// The output format is a list of CPUs with ranges (for example, "0,1,3-9").
operator std::string();
~CpuSet() { CPU_FREE(setp); }
CpuSet(const CpuSet &src) : CpuSet(src.num_cpus) {
memcpy(setp, src.setp, sz);
}
bool empty() const { return count() == 0; }
bool full() const { return count() == num_cpus; }
unsigned count() const { return CPU_COUNT_S(sz, setp); }
void zero() { CPU_ZERO_S(sz, setp); }
size_t size() const { return sz; }
CpuSet operator~() {
CpuSet full = UINTMAX_MAX;
return full ^ *this;
}
bool operator==(const CpuSet &rhs) { return CPU_EQUAL_S(sz, setp, rhs.setp); }
CpuSet &operator&=(const CpuSet &rhs) {
CPU_AND_S(sz, setp, setp, rhs.setp);
return *this;
}
CpuSet &operator|=(const CpuSet &rhs) {
CPU_OR_S(sz, setp, setp, rhs.setp);
return *this;
}
CpuSet &operator^=(const CpuSet &rhs) {
CPU_XOR_S(sz, setp, setp, rhs.setp);
return *this;
}
friend CpuSet operator&(CpuSet lhs, const CpuSet &rhs) {
lhs &= rhs;
return lhs;
}
friend CpuSet operator|(CpuSet lhs, const CpuSet &rhs) {
lhs |= rhs;
return lhs;
}
friend CpuSet operator^(CpuSet lhs, const CpuSet &rhs) {
lhs ^= rhs;
return lhs;
}
bool operator[](size_t cpu) const { return isSet(cpu); }
bool isSet(size_t cpu) const { return CPU_ISSET_S(cpu, sz, setp); }
void clear(size_t cpu) { CPU_CLR_S(cpu, sz, setp); }
void set(size_t cpu) { CPU_SET_S(cpu, sz, setp); }
};
} // namespace utils
} // namespace villas
#endif