Differential D3646 Diff 18708 ps/trunk/source/lib/sysdep/os/linux/lcpu.cpp

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ps/trunk/source/lib/sysdep/os/linux/lcpu.cpp

	/* Copyright (C) 2012 Wildfire Games.			/* Copyright (C) 2021 Wildfire Games.
	*			*
	* Permission is hereby granted, free of charge, to any person obtaining			* Permission is hereby granted, free of charge, to any person obtaining
	* a copy of this software and associated documentation files (the			* a copy of this software and associated documentation files (the
	* "Software"), to deal in the Software without restriction, including			* "Software"), to deal in the Software without restriction, including
	* without limitation the rights to use, copy, modify, merge, publish,			* without limitation the rights to use, copy, modify, merge, publish,
	* distribute, sublicense, and/or sell copies of the Software, and to			* distribute, sublicense, and/or sell copies of the Software, and to
	* permit persons to whom the Software is furnished to do so, subject to			* permit persons to whom the Software is furnished to do so, subject to
	* the following conditions:			* the following conditions:
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	* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.			* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	*/			*/

	#include "precompiled.h"			#include "precompiled.h"

	#include "lib/sysdep/os_cpu.h"			#include "lib/sysdep/os_cpu.h"
	#include "lib/alignment.h"			#include "lib/alignment.h"
	#include "lib/bits.h"			#include "lib/bits.h"
				#include "lib/config2.h"
	#include "lib/module_init.h"			#include "lib/module_init.h"

	#if OS_LINUX			#if CONFIG2_VALGRIND
	#include "valgrind.h"			# include "valgrind.h"
	#endif			#endif


	size_t os_cpu_NumProcessors()			size_t os_cpu_NumProcessors()
	{			{
	static size_t numProcessors;			static size_t numProcessors;

	if(numProcessors == 0)			if(numProcessors == 0)
	{			{
				#if CONFIG2_VALGRIND
	// Valgrind reports the number of real CPUs, but only emulates a single CPU.			// 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			// That causes problems when we expect all those CPUs to be distinct, so
	// just pretend there's only one CPU			// just pretend there's only one CPU
	if (RUNNING_ON_VALGRIND)			if (RUNNING_ON_VALGRIND)
	numProcessors = 1;			numProcessors = 1;
	else			else
				#endif
	{			{
	long res = sysconf(_SC_NPROCESSORS_CONF);			long res = sysconf(_SC_NPROCESSORS_CONF);
	ENSURE(res != -1);			ENSURE(res != -1);
	numProcessors = (size_t)res;			numProcessors = (size_t)res;
	}			}
	}			}

	return numProcessors;			return numProcessors;
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