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/* | ||
Copyright (c) 2019, jtgrassie | ||
Copyright (c) 2019, tevador <tevador@gmail.com> | ||
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. | ||
* Neither the name of the copyright holder nor the | ||
names of its contributors may be used to endorse or promote products | ||
derived from this software without specific prior written permission. | ||
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 HOLDER 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. | ||
*/ | ||
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#include <sstream> | ||
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#if defined(_WIN32) || defined(__CYGWIN__) | ||
#include <windows.h> | ||
#else | ||
#ifdef __APPLE__ | ||
#include <mach/thread_act.h> | ||
#include <mach/thread_policy.h> | ||
#endif | ||
#include <pthread.h> | ||
#endif | ||
#include "affinity.hpp" | ||
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int | ||
set_thread_affinity(const unsigned &cpuid) | ||
{ | ||
std::thread::native_handle_type thread; | ||
#if defined(_WIN32) || defined(__CYGWIN__) | ||
thread = static_cast<std::thread::native_handle_type>(GetCurrentThread()); | ||
#else | ||
thread = static_cast<std::thread::native_handle_type>(pthread_self()); | ||
#endif | ||
return set_thread_affinity(thread, cpuid); | ||
} | ||
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int | ||
set_thread_affinity(std::thread::native_handle_type thread, | ||
const unsigned &cpuid) | ||
{ | ||
int rc = -1; | ||
#ifdef __APPLE__ | ||
thread_port_t mach_thread; | ||
thread_affinity_policy_data_t policy = { static_cast<integer_t>(cpuid) }; | ||
mach_thread = pthread_mach_thread_np(thread); | ||
rc = thread_policy_set(mach_thread, THREAD_AFFINITY_POLICY, | ||
(thread_policy_t)&policy, 1); | ||
#elif defined(_WIN32) || defined(__CYGWIN__) | ||
rc = SetThreadAffinityMask(thread, 1ULL << cpuid) == 0 ? -2 : 0; | ||
#else | ||
cpu_set_t cs; | ||
CPU_ZERO(&cs); | ||
CPU_SET(cpuid, &cs); | ||
rc = pthread_setaffinity_np(thread, sizeof(cpu_set_t), &cs); | ||
#endif | ||
return rc; | ||
} | ||
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unsigned | ||
cpuid_from_mask(uint64_t mask, const unsigned &thread_index) | ||
{ | ||
static unsigned lookup[64]; | ||
static bool init = false; | ||
if (init) | ||
return lookup[thread_index]; | ||
unsigned count_found = 0; | ||
for (unsigned i=0; i<64; i++) | ||
{ | ||
if (1ULL & mask) | ||
{ | ||
lookup[count_found] = i; | ||
count_found++; | ||
} | ||
mask >>= 1; | ||
} | ||
init = true; | ||
return lookup[thread_index]; | ||
} | ||
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std::string | ||
mask_to_string(uint64_t mask) | ||
{ | ||
std::ostringstream ss; | ||
unsigned len = 0; | ||
unsigned v = 0; | ||
unsigned i = 64; | ||
while (i--) | ||
{ | ||
v = mask >> i; | ||
if (1ULL & v) | ||
{ | ||
if (len == 0) len = i + 1; | ||
ss << '1'; | ||
} | ||
else | ||
if (len > 0) ss << '0'; | ||
} | ||
return ss.str(); | ||
} |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,39 @@ | ||
/* | ||
Copyright (c) 2019, jtgrassie | ||
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. | ||
* Neither the name of the copyright holder nor the | ||
names of its contributors may be used to endorse or promote products | ||
derived from this software without specific prior written permission. | ||
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 HOLDER 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. | ||
*/ | ||
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#pragma once | ||
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#include <cstddef> | ||
#include <thread> | ||
#include <string> | ||
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int set_thread_affinity(const unsigned &cpuid); | ||
int set_thread_affinity(std::thread::native_handle_type thread, | ||
const unsigned &cpuid); | ||
unsigned cpuid_from_mask(uint64_t mask, const unsigned &thread_index); | ||
std::string mask_to_string(uint64_t mask); |
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