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/* Copyright (C) 2012 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* 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.
*/
#include "precompiled.h"
#include "lib/sysdep/os_cpu.h"
#include "lib/alignment.h"
#include "lib/bits.h"
#include "lib/module_init.h"
#include "valgrind.h"
#include <sys/param.h>
#include <sys/sysctl.h>
size_t os_cpu_NumProcessors()
{
static size_t numProcessors;
if(numProcessors == 0)
{
// Valgrind reports the number of real CPUs, but only emulates a single CPU.
// That causes problems when we expect all those CPUs to be distinct, so
// just pretend there's only one CPU
if (RUNNING_ON_VALGRIND)
numProcessors = 1;
else
{
long res = sysconf(_SC_NPROCESSORS_CONF);
ENSURE(res != -1);
numProcessors = (size_t)res;
}
}
return numProcessors;
}
uintptr_t os_cpu_ProcessorMask()
{
static uintptr_t processorMask;
if(!processorMask)
processorMask = bit_mask<uintptr_t>(os_cpu_NumProcessors());
return processorMask;
}
size_t os_cpu_PageSize()
{
static size_t pageSize;
if(!pageSize)
pageSize = (size_t)sysconf(_SC_PAGESIZE);
return pageSize;
}
size_t os_cpu_LargePageSize()
{
// assume they're unsupported.
return 0;
}
size_t os_cpu_QueryMemorySize()
{
size_t memorySize = 0;
size_t len = sizeof(memorySize);
// Argh, the API doesn't seem to be const-correct
/*const*/ int mib[2] = { CTL_HW, HW_PHYSMEM };
sysctl(mib, 2, &memorySize, &len, 0, 0);
memorySize /= MiB;
return memorySize;
}
size_t os_cpu_MemoryAvailable()
{
size_t memoryAvailable = 0;
size_t len = sizeof(memoryAvailable);
// Argh, the API doesn't seem to be const-correct
/*const*/ int mib[2] = { CTL_HW, HW_USERMEM };
sysctl(mib, 2, &memoryAvailable, &len, 0, 0);
memoryAvailable /= MiB;
return memoryAvailable;
}
uintptr_t os_cpu_SetThreadAffinityMask(uintptr_t UNUSED(processorMask))
{
// not yet implemented
return os_cpu_ProcessorMask();
}
Status os_cpu_CallByEachCPU(OsCpuCallback cb, uintptr_t cbData)
{
for(size_t processor = 0; processor < os_cpu_NumProcessors(); processor++)
{
const uintptr_t processorMask = uintptr_t(1) << processor;
os_cpu_SetThreadAffinityMask(processorMask);
cb(processor, cbData);
}
return INFO::OK;
}
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