122 lines
3.0 KiB
C++
122 lines
3.0 KiB
C++
/* Copyright (c) 2010 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 <sys/sysctl.h>
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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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// Mac OS X doesn't have sysconf(_SC_NPROCESSORS_CONF)
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int mib[]={CTL_HW, HW_NCPU};
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int ncpus;
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size_t len = sizeof(ncpus);
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int ret = sysctl(mib, 2, &ncpus, &len, NULL, 0);
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ENSURE(ret != -1);
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numProcessors = (size_t)ncpus;
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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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size_t memorySize = 0;
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size_t len = sizeof(memorySize);
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// Argh, the API doesn't seem to be const-correct
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/*const*/ int mib[2] = { CTL_HW, HW_PHYSMEM };
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sysctl(mib, 2, &memorySize, &len, 0, 0);
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memorySize /= MiB;
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return memorySize;
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}
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size_t os_cpu_MemoryAvailable()
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{
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size_t memoryAvailable = 0;
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size_t len = sizeof(memoryAvailable);
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// Argh, the API doesn't seem to be const-correct
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/*const*/ int mib[2] = { CTL_HW, HW_USERMEM };
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sysctl(mib, 2, &memoryAvailable, &len, 0, 0);
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memoryAvailable /= MiB;
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return memoryAvailable;
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}
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uintptr_t os_cpu_SetThreadAffinityMask(uintptr_t processorMask)
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{
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// not yet implemented. when doing so, see http://developer.apple.com/releasenotes/Performance/RN-AffinityAPI/
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return os_cpu_ProcessorMask();
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}
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LibError os_cpu_CallByEachCPU(OsCpuCallback cb, uintptr_t cbData)
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{
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for(size_t processor = 0; processor < os_cpu_NumProcessors(); processor++)
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{
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const uintptr_t processorMask = uintptr_t(1) << processor;
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os_cpu_SetThreadAffinityMask(processorMask);
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cb(processor, cbData);
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}
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return INFO::OK;
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}
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