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/* Copyright (C) 2010 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.
*/
/*
* OS-specific support functions relating to CPU and memory
*/
#include "precompiled.h"
#include "lib/sysdep/os_cpu.h"
#include "lib/alignment.h"
#include "lib/sysdep/smbios.h"
#if OS_WIN
# include "lib/sysdep/os/win/wcpu.h"
#endif
static const StatusDefinition osCpuStatusDefinitions[] = {
{ ERR::OS_CPU_RESTRICTED_AFFINITY, L"Cannot set desired CPU affinity" }
};
STATUS_ADD_DEFINITIONS(osCpuStatusDefinitions);
double os_cpu_ClockFrequency()
{
static double clockFrequency;
if(clockFrequency != 0.0) // already initialized
return clockFrequency;
#if OS_WIN
u32 freqMhz;
if(wcpu_ReadFrequencyFromRegistry(freqMhz) == INFO::OK)
return clockFrequency = freqMhz * 1e6;
#endif
const SMBIOS::Structures* structures = SMBIOS::GetStructures();
if(structures->Processor_)
return clockFrequency = structures->Processor_->maxFrequency * 1e6;
return clockFrequency = -1.0; // unknown
}
size_t os_cpu_MemorySize()
{
static size_t memorySize;
if(memorySize != 0) // already initialized
return memorySize;
memorySize = os_cpu_QueryMemorySize();
// replace with the sum of all memory devices reported by SMBIOS if
// that's within 10% of what the OS reported
{
const SMBIOS::Structures* structures = SMBIOS::GetStructures();
u64 memorySizeBytes = 0;
for(const SMBIOS::MemoryDevice* p = structures->MemoryDevice_; p; p = p->next)
memorySizeBytes += p->size;
const size_t memorySize2 = memorySizeBytes/MiB;
if(9*memorySize/10 <= memorySize2 && memorySize2 <= 11*memorySize/10)
memorySize = memorySize2;
}
return memorySize;
}
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