janwas
ee4c7965dd
* app_hooks: add display_error; can be used by atlas to override our dialog box * lots of small fixes (mostly pertaining to headers) * debug: clean up display_error, protect from reentrancy, fix a few edge cases (e.g. error message from dtor -> exit pressed -> suppress all subsequent errors) * delay_load: add warning: NLSO ctors are unreliable since we're compiling into static lib This was SVN commit r4009.
119 lines
3.2 KiB
C++
119 lines
3.2 KiB
C++
/**
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* =========================================================================
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* File : cpu.cpp
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* Project : 0 A.D.
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* Description : CPU and memory detection.
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*
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* @author Jan.Wassenberg@stud.uni-karlsruhe.de
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* =========================================================================
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*/
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/*
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* Copyright (c) 2003-2005 Jan Wassenberg
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*
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* Redistribution and/or modification are also permitted under the
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* terms of the GNU General Public License as published by the
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* Free Software Foundation (version 2 or later, at your option).
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "precompiled.h"
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#include "lib/lib.h"
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#include "cpu.h"
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#if CPU_IA32
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# include "lib/sysdep/ia32.h"
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#endif
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char cpu_type[CPU_TYPE_LEN] = "";
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double cpu_freq = 0.f;
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// -1 if detect not yet called, or cannot be determined
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int cpus = -1;
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int cpu_ht_units = -1;
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int cpu_cores = -1;
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int cpu_speedstep = -1;
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void cpu_init()
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{
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#if CPU_IA32
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// must come before any uses of ia32.asm, e.g. by get_cpu_info
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ia32_init();
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// no longer set 24 bit (float) precision by default: for
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// very long game uptimes (> 1 day; e.g. dedicated server),
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// we need full precision when calculating the time.
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// if there's a spot where we want to speed up divides|sqrts,
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// we can temporarily change precision there.
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//ia32_control87(IA32_PC_24, IA32_MCW_PC);
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// to help catch bugs, enable as many floating-point exceptions as
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// possible. that means only zero-divide, because the JS engine is
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// triggering the rest.
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// note: passing a flag *disables* that exception.
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ia32_control87(IA32_EM_ZERODIVIDE|IA32_EM_INVALID|IA32_EM_DENORMAL|IA32_EM_OVERFLOW|IA32_EM_UNDERFLOW|IA32_EM_INEXACT, IA32_MCW_EM);
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// no longer round toward zero (truncate). changing this setting
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// resulted in much faster float->int casts, because the compiler
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// could be told (via /QIfist) to use FISTP while still truncating
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// the result as required by ANSI C. however, FPU calculation
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// results were changed significantly, so it had to be disabled.
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//ia32_control87(IA32_RC_CHOP, IA32_MCW_RC);
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#endif
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// detects CPU clock frequency and capabilities, which are prerequisites
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// for using the TSC as a timer (desirable due to its high resolution).
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// do this before lengthy init so we can time those accurately.
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#if OS_WIN
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extern LibError win_get_cpu_info();
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win_get_cpu_info();
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#elif OS_UNIX
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extern LibError unix_get_cpu_info();
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unix_get_cpu_info();
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#endif
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#if CPU_IA32
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ia32_get_cpu_info();
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#endif
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}
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//
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// memory
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//
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size_t tot_mem = 0;
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size_t avl_mem = 0;
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size_t page_size = 0;
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void get_mem_status()
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{
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#ifdef _SC_PAGESIZE
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if(!page_size)
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page_size = (size_t)sysconf(_SC_PAGESIZE);
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#endif
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// Sys V derived (GNU/Linux, Solaris)
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#if defined(_SC_AVPHYS_PAGES)
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tot_mem = sysconf(_SC_PHYS_PAGES ) * page_size;
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avl_mem = sysconf(_SC_AVPHYS_PAGES) * page_size;
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// BSD / Mac OS X
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#elif defined(HW_PHYSMEM)
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size_t len = sizeof(tot_mem);
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int mib[2] = { CTL_HW, HW_PHYSMEM };
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sysctl(mib, 2, &tot_mem, &len, 0, 0);
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mib[1] = HW_USERMEM;
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sysctl(mib, 2, &avl_mem, &len, 0, 0);
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#endif
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}
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