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/////////////////////////////////////////////////////////////////////////////// |
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// |
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/// \file tuklib_physmem.c |
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/// \brief Get the amount of physical memory |
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// |
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// Author: Lasse Collin |
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// |
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// This file has been put into the public domain. |
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// You can do whatever you want with this file. |
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// |
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/////////////////////////////////////////////////////////////////////////////// |
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|
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#include "tuklib_physmem.h" |
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|
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// We want to use Windows-specific code on Cygwin, which also has memory |
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// information available via sysconf(), but on Cygwin 1.5 and older it |
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// gives wrong results (from our point of view). |
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#if defined(_WIN32) || defined(__CYGWIN__) |
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# ifndef _WIN32_WINNT |
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# define _WIN32_WINNT 0x0500 |
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# endif |
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# include <windows.h> |
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|
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#elif defined(__OS2__) |
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# define INCL_DOSMISC |
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# include <os2.h> |
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|
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#elif defined(__DJGPP__) |
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# include <dpmi.h> |
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|
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#elif defined(__VMS) |
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# include <lib$routines.h> |
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# include <syidef.h> |
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# include <ssdef.h> |
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|
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#elif defined(AMIGA) || defined(__AROS__) |
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# define __USE_INLINE__ |
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# include <proto/exec.h> |
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|
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// AIX |
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#elif defined(TUKLIB_PHYSMEM_AIX) |
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# include <sys/systemcfg.h> |
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|
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#elif defined(TUKLIB_PHYSMEM_SYSCONF) |
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# include <unistd.h> |
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|
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#elif defined(TUKLIB_PHYSMEM_SYSCTL) |
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# ifdef HAVE_SYS_PARAM_H |
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# include <sys/param.h> |
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# endif |
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# include <sys/sysctl.h> |
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|
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// Tru64 |
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#elif defined(TUKLIB_PHYSMEM_GETSYSINFO) |
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# include <sys/sysinfo.h> |
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# include <machine/hal_sysinfo.h> |
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|
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// HP-UX |
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#elif defined(TUKLIB_PHYSMEM_PSTAT_GETSTATIC) |
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# include <sys/param.h> |
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# include <sys/pstat.h> |
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|
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// IRIX |
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#elif defined(TUKLIB_PHYSMEM_GETINVENT_R) |
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# include <invent.h> |
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|
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// This sysinfo() is Linux-specific. |
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#elif defined(TUKLIB_PHYSMEM_SYSINFO) |
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# include <sys/sysinfo.h> |
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#endif |
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|
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|
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extern uint64_t |
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tuklib_physmem(void) |
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{ |
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uint64_t ret = 0; |
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|
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#if defined(_WIN32) || defined(__CYGWIN__) |
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if ((GetVersion() & 0xFF) >= 5) { |
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// Windows 2000 and later have GlobalMemoryStatusEx() which |
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// supports reporting values greater than 4 GiB. To keep the |
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// code working also on older Windows versions, use |
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// GlobalMemoryStatusEx() conditionally. |
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HMODULE kernel32 = GetModuleHandle("kernel32.dll"); |
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if (kernel32 != NULL) { |
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BOOL (WINAPI *gmse)(LPMEMORYSTATUSEX) = GetProcAddress( |
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kernel32, "GlobalMemoryStatusEx"); |
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if (gmse != NULL) { |
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MEMORYSTATUSEX meminfo; |
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meminfo.dwLength = sizeof(meminfo); |
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if (gmse(&meminfo)) |
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ret = meminfo.ullTotalPhys; |
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} |
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} |
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} |
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|
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if (ret == 0) { |
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// GlobalMemoryStatus() is supported by Windows 95 and later, |
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// so it is fine to link against it unconditionally. Note that |
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// GlobalMemoryStatus() has no return value. |
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MEMORYSTATUS meminfo; |
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meminfo.dwLength = sizeof(meminfo); |
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GlobalMemoryStatus(&meminfo); |
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ret = meminfo.dwTotalPhys; |
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} |
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|
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#elif defined(__OS2__) |
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unsigned long mem; |
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if (DosQuerySysInfo(QSV_TOTPHYSMEM, QSV_TOTPHYSMEM, |
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&mem, sizeof(mem)) == 0) |
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ret = mem; |
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|
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#elif defined(__DJGPP__) |
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__dpmi_free_mem_info meminfo; |
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if (__dpmi_get_free_memory_information(&meminfo) == 0 |
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&& meminfo.total_number_of_physical_pages |
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!= (unsigned long)-1) |
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ret = (uint64_t)meminfo.total_number_of_physical_pages * 4096; |
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|
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#elif defined(__VMS) |
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int vms_mem; |
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int val = SYI$_MEMSIZE; |
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if (LIB$GETSYI(&val, &vms_mem, 0, 0, 0, 0) == SS$_NORMAL) |
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ret = (uint64_t)vms_mem * 8192; |
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|
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#elif defined(AMIGA) || defined(__AROS__) |
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ret = AvailMem(MEMF_TOTAL); |
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|
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#elif defined(TUKLIB_PHYSMEM_AIX) |
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ret = _system_configuration.physmem; |
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|
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#elif defined(TUKLIB_PHYSMEM_SYSCONF) |
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const long pagesize = sysconf(_SC_PAGESIZE); |
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const long pages = sysconf(_SC_PHYS_PAGES); |
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if (pagesize != -1 && pages != -1) |
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// According to docs, pagesize * pages can overflow. |
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// Simple case is 32-bit box with 4 GiB or more RAM, |
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// which may report exactly 4 GiB of RAM, and "long" |
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// being 32-bit will overflow. Casting to uint64_t |
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// hopefully avoids overflows in the near future. |
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ret = (uint64_t)pagesize * (uint64_t)pages; |
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|
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#elif defined(TUKLIB_PHYSMEM_SYSCTL) |
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int name[2] = { |
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CTL_HW, |
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#ifdef HW_PHYSMEM64 |
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HW_PHYSMEM64 |
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#else |
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HW_PHYSMEM |
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#endif |
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}; |
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union { |
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uint32_t u32; |
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uint64_t u64; |
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} mem; |
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size_t mem_ptr_size = sizeof(mem.u64); |
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if (sysctl(name, 2, &mem.u64, &mem_ptr_size, NULL, 0) != -1) { |
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// IIRC, 64-bit "return value" is possible on some 64-bit |
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// BSD systems even with HW_PHYSMEM (instead of HW_PHYSMEM64), |
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// so support both. |
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if (mem_ptr_size == sizeof(mem.u64)) |
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ret = mem.u64; |
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else if (mem_ptr_size == sizeof(mem.u32)) |
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ret = mem.u32; |
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} |
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|
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#elif defined(TUKLIB_PHYSMEM_GETSYSINFO) |
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// Docs are unclear if "start" is needed, but it doesn't hurt |
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// much to have it. |
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int memkb; |
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int start = 0; |
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if (getsysinfo(GSI_PHYSMEM, (caddr_t)&memkb, sizeof(memkb), &start) |
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!= -1) |
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ret = (uint64_t)memkb * 1024; |
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|
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#elif defined(TUKLIB_PHYSMEM_PSTAT_GETSTATIC) |
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struct pst_static pst; |
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if (pstat_getstatic(&pst, sizeof(pst), 1, 0) != -1) |
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ret = (uint64_t)pst.physical_memory * (uint64_t)pst.page_size; |
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|
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#elif defined(TUKLIB_PHYSMEM_GETINVENT_R) |
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inv_state_t *st = NULL; |
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if (setinvent_r(&st) != -1) { |
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inventory_t *i; |
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while ((i = getinvent_r(st)) != NULL) { |
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if (i->inv_class == INV_MEMORY |
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&& i->inv_type == INV_MAIN_MB) { |
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ret = (uint64_t)i->inv_state << 20; |
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break; |
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} |
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} |
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|
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endinvent_r(st); |
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} |
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|
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#elif defined(TUKLIB_PHYSMEM_SYSINFO) |
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struct sysinfo si; |
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if (sysinfo(&si) == 0) |
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ret = (uint64_t)si.totalram * si.mem_unit; |
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#endif |
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|
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return ret; |
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} |
