mirror of
https://gitea.wildfiregames.com/0ad/0ad.git
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114 lines
2.8 KiB
C++
114 lines
2.8 KiB
C++
/* Copyright (C) 2026 Wildfire Games.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "precompiled.h"
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#include "lib/sysdep/os_cpu.h"
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#include "lib/alignment.h"
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#include "lib/bits.h"
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#include "lib/config2.h"
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#include "lib/debug.h"
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#include "lib/module_init.h"
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#include "lib/posix/posix_pthread.h"
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#include "lib/posix/posix_types.h"
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#include "lib/status.h"
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#include "lib/sysdep/os.h"
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#include <cerrno>
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#include <cstddef>
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#include <cstdint>
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#if CONFIG2_VALGRIND
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# include "valgrind.h"
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#endif
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size_t os_cpu_NumProcessors()
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{
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static size_t numProcessors;
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if(numProcessors == 0)
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{
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#if CONFIG2_VALGRIND
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// Valgrind reports the number of real CPUs, but only emulates a single CPU.
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// That causes problems when we expect all those CPUs to be distinct, so
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// just pretend there's only one CPU
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if (RUNNING_ON_VALGRIND)
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numProcessors = 1;
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else
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#endif
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{
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long res = sysconf(_SC_NPROCESSORS_CONF);
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ENSURE(res != -1);
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numProcessors = (size_t)res;
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}
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}
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return numProcessors;
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}
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uintptr_t os_cpu_ProcessorMask()
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{
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static uintptr_t processorMask;
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if(!processorMask)
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processorMask = bit_mask<uintptr_t>(os_cpu_NumProcessors());
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return processorMask;
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}
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size_t os_cpu_PageSize()
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{
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static size_t pageSize;
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if(!pageSize)
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pageSize = (size_t)sysconf(_SC_PAGESIZE);
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return pageSize;
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}
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size_t os_cpu_LargePageSize()
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{
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// assume they're unsupported.
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return 0;
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}
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size_t os_cpu_QueryMemorySize()
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{
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const uint64_t memorySize = (uint64_t)sysconf(_SC_PHYS_PAGES) * os_cpu_PageSize();
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return size_t(memorySize / MiB);
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}
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size_t os_cpu_MemoryAvailable()
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{
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const uint64_t memoryAvailableBytes = (uint64_t)sysconf(_SC_AVPHYS_PAGES) * os_cpu_PageSize();
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const size_t memoryAvailable = size_t(memoryAvailableBytes / MiB);
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return memoryAvailable;
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}
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