libiberty/physmem.c - gcc - Git at Google

 /* Calculate the size of physical memory.
    Copyright (C) 2000-2023 Free Software Foundation, Inc.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2, or (at your option)
    any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software Foundation,
    Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */

 /* Written by Paul Eggert.  */

 #if HAVE_CONFIG_H
 # include <config.h>
 #endif

 #if HAVE_UNISTD_H
 # include <unistd.h>
 #endif

 #if HAVE_SYS_PSTAT_H
 # include <sys/pstat.h>
 #endif

 #if HAVE_SYS_SYSMP_H
 # include <sys/sysmp.h>
 #endif

 #if HAVE_SYS_SYSINFO_H && HAVE_MACHINE_HAL_SYSINFO_H
 # include <sys/sysinfo.h>
 # include <machine/hal_sysinfo.h>
 #endif

 #if HAVE_SYS_TABLE_H
 # include <sys/table.h>
 #endif

 #include <sys/types.h>

 #if HAVE_SYS_PARAM_H
 # include <sys/param.h>
 #endif

 #if HAVE_SYS_SYSCTL_H
 # include <sys/sysctl.h>
 #endif

 #if HAVE_SYS_SYSTEMCFG_H
 # include <sys/systemcfg.h>
 #endif

 #ifdef _WIN32
 # define WIN32_LEAN_AND_MEAN
 # include <windows.h>
 /*  MEMORYSTATUSEX is missing from older windows headers, so define
     a local replacement.  */
 typedef struct
 {
   DWORD dwLength;
   DWORD dwMemoryLoad;
   DWORDLONG ullTotalPhys;
   DWORDLONG ullAvailPhys;
   DWORDLONG ullTotalPageFile;
   DWORDLONG ullAvailPageFile;
   DWORDLONG ullTotalVirtual;
   DWORDLONG ullAvailVirtual;
   DWORDLONG ullAvailExtendedVirtual;
 } lMEMORYSTATUSEX;
 typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*);
 #endif

 #include "libiberty.h"

 /* Return the total amount of physical memory.  */
 double
 physmem_total (void)
 {
 #if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
   { /* This works on linux-gnu, solaris2 and cygwin.  */
     double pages = sysconf (_SC_PHYS_PAGES);
     double pagesize = sysconf (_SC_PAGESIZE);
     if (0 <= pages && 0 <= pagesize)
       return pages * pagesize;
   }
 #endif

 #if HAVE_PSTAT_GETSTATIC
   { /* This works on hpux11.  */
     struct pst_static pss;
     if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0))
       {
 	double pages = pss.physical_memory;
 	double pagesize = pss.page_size;
 	if (0 <= pages && 0 <= pagesize)
 	  return pages * pagesize;
       }
   }
 #endif

 #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
   { /* This works on irix6. */
     struct rminfo realmem;
     if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
       {
 	double pagesize = sysconf (_SC_PAGESIZE);
 	double pages = realmem.physmem;
 	if (0 <= pages && 0 <= pagesize)
 	  return pages * pagesize;
       }
   }
 #endif

 #if HAVE_GETSYSINFO && defined GSI_PHYSMEM
   { /* This works on Tru64 UNIX V4/5.  */
     int physmem;

     if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem),
 		    NULL, NULL, NULL) == 1)
       {
 	double kbytes = physmem;

 	if (0 <= kbytes)
 	  return kbytes * 1024.0;
       }
   }
 #endif

 #if HAVE_SYSCTL && defined HW_PHYSMEM
   { /* This works on *bsd and darwin.  */
     unsigned int physmem;
     size_t len = sizeof physmem;
     static int mib[2] = { CTL_HW, HW_PHYSMEM };

     if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0
 	&& len == sizeof (physmem))
       return (double) physmem;
   }
 #endif

 #if HAVE__SYSTEM_CONFIGURATION
   /* This works on AIX 4.3.3+.  */
   return _system_configuration.physmem;
 #endif

 #if defined _WIN32
   { /* this works on windows */
     PFN_MS_EX pfnex;
     HMODULE h = GetModuleHandle ("kernel32.dll");

     if (!h)
       return 0.0;

     /*  Use GlobalMemoryStatusEx if available.  */
     if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
       {
 	lMEMORYSTATUSEX lms_ex;
 	lms_ex.dwLength = sizeof lms_ex;
 	if (!pfnex (&lms_ex))
 	  return 0.0;
 	return (double) lms_ex.ullTotalPhys;
       }

     /*  Fall back to GlobalMemoryStatus which is always available.
         but returns wrong results for physical memory > 4GB.  */
     else
       {
 	MEMORYSTATUS ms;
 	GlobalMemoryStatus (&ms);
 	return (double) ms.dwTotalPhys;
       }
   }
 #endif

   /* Return 0 if we can't determine the value.  */
   return 0;
 }

 /* Return the amount of physical memory available.  */
 double
 physmem_available (void)
 {
 #if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
   { /* This works on linux-gnu, solaris2 and cygwin.  */
     double pages = sysconf (_SC_AVPHYS_PAGES);
     double pagesize = sysconf (_SC_PAGESIZE);
     if (0 <= pages && 0 <= pagesize)
       return pages * pagesize;
   }
 #endif

 #if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
   { /* This works on hpux11.  */
     struct pst_static pss;
     struct pst_dynamic psd;
     if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)
 	&& 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0))
       {
 	double pages = psd.psd_free;
 	double pagesize = pss.page_size;
 	if (0 <= pages && 0 <= pagesize)
 	  return pages * pagesize;
       }
   }
 #endif

 #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
   { /* This works on irix6. */
     struct rminfo realmem;
     if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
       {
 	double pagesize = sysconf (_SC_PAGESIZE);
 	double pages = realmem.availrmem;
 	if (0 <= pages && 0 <= pagesize)
 	  return pages * pagesize;
       }
   }
 #endif

 #if HAVE_TABLE && defined TBL_VMSTATS
   { /* This works on Tru64 UNIX V4/5.  */
     struct tbl_vmstats vmstats;

     if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1)
       {
 	double pages = vmstats.free_count;
 	double pagesize = vmstats.pagesize;

 	if (0 <= pages && 0 <= pagesize)
 	  return pages * pagesize;
       }
   }
 #endif

 #if HAVE_SYSCTL && defined HW_USERMEM
   { /* This works on *bsd and darwin.  */
     unsigned int usermem;
     size_t len = sizeof usermem;
     static int mib[2] = { CTL_HW, HW_USERMEM };

     if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0
 	&& len == sizeof (usermem))
       return (double) usermem;
   }
 #endif

 #if defined _WIN32
   { /* this works on windows */
     PFN_MS_EX pfnex;
     HMODULE h = GetModuleHandle ("kernel32.dll");

     if (!h)
       return 0.0;

     /*  Use GlobalMemoryStatusEx if available.  */
     if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
       {
 	lMEMORYSTATUSEX lms_ex;
 	lms_ex.dwLength = sizeof lms_ex;
 	if (!pfnex (&lms_ex))
 	  return 0.0;
 	return (double) lms_ex.ullAvailPhys;
       }

     /*  Fall back to GlobalMemoryStatus which is always available.
         but returns wrong results for physical memory > 4GB  */
     else
       {
 	MEMORYSTATUS ms;
 	GlobalMemoryStatus (&ms);
 	return (double) ms.dwAvailPhys;
       }
   }
 #endif

   /* Guess 25% of physical memory.  */
   return physmem_total () / 4;
 }


 #if DEBUG

 # include <stdio.h>
 # include <stdlib.h>

 int
 main (void)
 {
   printf ("%12.f %12.f\n", physmem_total (), physmem_available ());
   exit (0);
 }

 #endif /* DEBUG */

 /*
 Local Variables:
 compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c"
 End:
 */
	/* Calculate the size of physical memory.
	Copyright (C) 2000-2023 Free Software Foundation, Inc.

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2, or (at your option)
	any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software Foundation,
	Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */

	/* Written by Paul Eggert. */

	#if HAVE_CONFIG_H
	# include <config.h>
	#endif

	#if HAVE_UNISTD_H
	# include <unistd.h>
	#endif

	#if HAVE_SYS_PSTAT_H
	# include <sys/pstat.h>
	#endif

	#if HAVE_SYS_SYSMP_H
	# include <sys/sysmp.h>
	#endif

	#if HAVE_SYS_SYSINFO_H && HAVE_MACHINE_HAL_SYSINFO_H
	# include <sys/sysinfo.h>
	# include <machine/hal_sysinfo.h>
	#endif

	#if HAVE_SYS_TABLE_H
	# include <sys/table.h>
	#endif

	#include <sys/types.h>

	#if HAVE_SYS_PARAM_H
	# include <sys/param.h>
	#endif

	#if HAVE_SYS_SYSCTL_H
	# include <sys/sysctl.h>
	#endif

	#if HAVE_SYS_SYSTEMCFG_H
	# include <sys/systemcfg.h>
	#endif

	#ifdef _WIN32
	# define WIN32_LEAN_AND_MEAN
	# include <windows.h>
	/* MEMORYSTATUSEX is missing from older windows headers, so define
	a local replacement. */
	typedef struct
	{
	DWORD dwLength;
	DWORD dwMemoryLoad;
	DWORDLONG ullTotalPhys;
	DWORDLONG ullAvailPhys;
	DWORDLONG ullTotalPageFile;
	DWORDLONG ullAvailPageFile;
	DWORDLONG ullTotalVirtual;
	DWORDLONG ullAvailVirtual;
	DWORDLONG ullAvailExtendedVirtual;
	} lMEMORYSTATUSEX;
	typedef WINBOOL (WINAPI PFN_MS_EX) (lMEMORYSTATUSEX);
	#endif

	#include "libiberty.h"

	/* Return the total amount of physical memory. */
	double
	physmem_total (void)
	{
	#if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
	{ /* This works on linux-gnu, solaris2 and cygwin. */
	double pages = sysconf (_SC_PHYS_PAGES);
	double pagesize = sysconf (_SC_PAGESIZE);
	if (0 <= pages && 0 <= pagesize)
	return pages * pagesize;
	}
	#endif

	#if HAVE_PSTAT_GETSTATIC
	{ /* This works on hpux11. */
	struct pst_static pss;
	if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0))
	{
	double pages = pss.physical_memory;
	double pagesize = pss.page_size;
	if (0 <= pages && 0 <= pagesize)
	return pages * pagesize;
	}
	}
	#endif

	#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
	{ /* This works on irix6. */
	struct rminfo realmem;
	if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
	{
	double pagesize = sysconf (_SC_PAGESIZE);
	double pages = realmem.physmem;
	if (0 <= pages && 0 <= pagesize)
	return pages * pagesize;
	}
	}
	#endif

	#if HAVE_GETSYSINFO && defined GSI_PHYSMEM
	{ /* This works on Tru64 UNIX V4/5. */
	int physmem;

	if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem),
	NULL, NULL, NULL) == 1)
	{
	double kbytes = physmem;

	if (0 <= kbytes)
	return kbytes * 1024.0;
	}
	}
	#endif

	#if HAVE_SYSCTL && defined HW_PHYSMEM
	{ /* This works on bsd and darwin. /
	unsigned int physmem;
	size_t len = sizeof physmem;
	static int mib[2] = { CTL_HW, HW_PHYSMEM };

	if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0
	&& len == sizeof (physmem))
	return (double) physmem;
	}
	#endif

	#if HAVE__SYSTEM_CONFIGURATION
	/* This works on AIX 4.3.3+. */
	return _system_configuration.physmem;
	#endif

	#if defined _WIN32
	{ /* this works on windows */
	PFN_MS_EX pfnex;
	HMODULE h = GetModuleHandle ("kernel32.dll");

	if (!h)
	return 0.0;

	/* Use GlobalMemoryStatusEx if available. */
	if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
	{
	lMEMORYSTATUSEX lms_ex;
	lms_ex.dwLength = sizeof lms_ex;
	if (!pfnex (&lms_ex))
	return 0.0;
	return (double) lms_ex.ullTotalPhys;
	}

	/* Fall back to GlobalMemoryStatus which is always available.
	but returns wrong results for physical memory > 4GB. */
	else
	{
	MEMORYSTATUS ms;
	GlobalMemoryStatus (&ms);
	return (double) ms.dwTotalPhys;
	}
	}
	#endif

	/* Return 0 if we can't determine the value. */
	return 0;
	}

	/* Return the amount of physical memory available. */
	double
	physmem_available (void)
	{
	#if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
	{ /* This works on linux-gnu, solaris2 and cygwin. */
	double pages = sysconf (_SC_AVPHYS_PAGES);
	double pagesize = sysconf (_SC_PAGESIZE);
	if (0 <= pages && 0 <= pagesize)
	return pages * pagesize;
	}
	#endif

	#if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
	{ /* This works on hpux11. */
	struct pst_static pss;
	struct pst_dynamic psd;
	if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)
	&& 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0))
	{
	double pages = psd.psd_free;
	double pagesize = pss.page_size;
	if (0 <= pages && 0 <= pagesize)
	return pages * pagesize;
	}
	}
	#endif

	#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
	{ /* This works on irix6. */
	struct rminfo realmem;
	if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
	{
	double pagesize = sysconf (_SC_PAGESIZE);
	double pages = realmem.availrmem;
	if (0 <= pages && 0 <= pagesize)
	return pages * pagesize;
	}
	}
	#endif

	#if HAVE_TABLE && defined TBL_VMSTATS
	{ /* This works on Tru64 UNIX V4/5. */
	struct tbl_vmstats vmstats;

	if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1)
	{
	double pages = vmstats.free_count;
	double pagesize = vmstats.pagesize;

	if (0 <= pages && 0 <= pagesize)
	return pages * pagesize;
	}
	}
	#endif

	#if HAVE_SYSCTL && defined HW_USERMEM
	{ /* This works on bsd and darwin. /
	unsigned int usermem;
	size_t len = sizeof usermem;
	static int mib[2] = { CTL_HW, HW_USERMEM };

	if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0
	&& len == sizeof (usermem))
	return (double) usermem;
	}
	#endif

	#if defined _WIN32
	{ /* this works on windows */
	PFN_MS_EX pfnex;
	HMODULE h = GetModuleHandle ("kernel32.dll");

	if (!h)
	return 0.0;

	/* Use GlobalMemoryStatusEx if available. */
	if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
	{
	lMEMORYSTATUSEX lms_ex;
	lms_ex.dwLength = sizeof lms_ex;
	if (!pfnex (&lms_ex))
	return 0.0;
	return (double) lms_ex.ullAvailPhys;
	}

	/* Fall back to GlobalMemoryStatus which is always available.
	but returns wrong results for physical memory > 4GB */
	else
	{
	MEMORYSTATUS ms;
	GlobalMemoryStatus (&ms);
	return (double) ms.dwAvailPhys;
	}
	}
	#endif

	/* Guess 25% of physical memory. */
	return physmem_total () / 4;
	}


	#if DEBUG

	# include <stdio.h>
	# include <stdlib.h>

	int
	main (void)
	{
	printf ("%12.f %12.f\n", physmem_total (), physmem_available ());
	exit (0);
	}

	#endif /* DEBUG */

	/*
	Local Variables:
	compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c"
	End:
	*/