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5191 | serge | 1 | /* Calculate the size of physical memory. |
2 | Copyright 2000, 2001, 2003, 2004, 2005 Free Software Foundation, Inc. |
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3 | |||
4 | This program is free software; you can redistribute it and/or modify |
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5 | it under the terms of the GNU General Public License as published by |
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6 | the Free Software Foundation; either version 2, or (at your option) |
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7 | any later version. |
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8 | |||
9 | This program is distributed in the hope that it will be useful, |
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10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | GNU General Public License for more details. |
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13 | |||
14 | You should have received a copy of the GNU General Public License |
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15 | along with this program; if not, write to the Free Software Foundation, |
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16 | Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
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17 | |||
18 | /* Written by Paul Eggert. */ |
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19 | |||
20 | #if HAVE_CONFIG_H |
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21 | # include |
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22 | #endif |
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23 | |||
24 | #if HAVE_UNISTD_H |
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25 | # include |
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26 | #endif |
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27 | |||
28 | #if HAVE_SYS_PSTAT_H |
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29 | # include |
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30 | #endif |
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31 | |||
32 | #if HAVE_SYS_SYSMP_H |
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33 | # include |
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34 | #endif |
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35 | |||
36 | #if HAVE_SYS_SYSINFO_H && HAVE_MACHINE_HAL_SYSINFO_H |
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37 | # include |
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38 | # include |
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39 | #endif |
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40 | |||
41 | #if HAVE_SYS_TABLE_H |
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42 | # include |
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43 | #endif |
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44 | |||
45 | #include |
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46 | |||
47 | #if HAVE_SYS_PARAM_H |
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48 | # include |
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49 | #endif |
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50 | |||
51 | #if HAVE_SYS_SYSCTL_H |
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52 | # include |
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53 | #endif |
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54 | |||
55 | #if HAVE_SYS_SYSTEMCFG_H |
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56 | # include |
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57 | #endif |
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58 | |||
59 | #ifdef _WIN32 |
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60 | # define WIN32_LEAN_AND_MEAN |
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61 | # include |
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62 | /* MEMORYSTATUSEX is missing from older windows headers, so define |
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63 | a local replacement. */ |
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64 | typedef struct |
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65 | { |
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66 | DWORD dwLength; |
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67 | DWORD dwMemoryLoad; |
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68 | DWORDLONG ullTotalPhys; |
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69 | DWORDLONG ullAvailPhys; |
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70 | DWORDLONG ullTotalPageFile; |
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71 | DWORDLONG ullAvailPageFile; |
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72 | DWORDLONG ullTotalVirtual; |
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73 | DWORDLONG ullAvailVirtual; |
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74 | DWORDLONG ullAvailExtendedVirtual; |
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75 | } lMEMORYSTATUSEX; |
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76 | typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*); |
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77 | #endif |
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78 | |||
79 | #include "libiberty.h" |
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80 | |||
81 | /* Return the total amount of physical memory. */ |
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82 | double |
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83 | physmem_total (void) |
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84 | { |
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85 | #if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE |
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86 | { /* This works on linux-gnu, solaris2 and cygwin. */ |
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87 | double pages = sysconf (_SC_PHYS_PAGES); |
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88 | double pagesize = sysconf (_SC_PAGESIZE); |
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89 | if (0 <= pages && 0 <= pagesize) |
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90 | return pages * pagesize; |
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91 | } |
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92 | #endif |
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93 | |||
94 | #if HAVE_PSTAT_GETSTATIC |
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95 | { /* This works on hpux11. */ |
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96 | struct pst_static pss; |
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97 | if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)) |
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98 | { |
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99 | double pages = pss.physical_memory; |
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100 | double pagesize = pss.page_size; |
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101 | if (0 <= pages && 0 <= pagesize) |
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102 | return pages * pagesize; |
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103 | } |
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104 | } |
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105 | #endif |
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106 | |||
107 | #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE |
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108 | { /* This works on irix6. */ |
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109 | struct rminfo realmem; |
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110 | if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0) |
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111 | { |
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112 | double pagesize = sysconf (_SC_PAGESIZE); |
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113 | double pages = realmem.physmem; |
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114 | if (0 <= pages && 0 <= pagesize) |
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115 | return pages * pagesize; |
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116 | } |
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117 | } |
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118 | #endif |
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119 | |||
120 | #if HAVE_GETSYSINFO && defined GSI_PHYSMEM |
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121 | { /* This works on Tru64 UNIX V4/5. */ |
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122 | int physmem; |
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123 | |||
124 | if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem), |
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125 | NULL, NULL, NULL) == 1) |
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126 | { |
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127 | double kbytes = physmem; |
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128 | |||
129 | if (0 <= kbytes) |
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130 | return kbytes * 1024.0; |
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131 | } |
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132 | } |
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133 | #endif |
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134 | |||
135 | #if HAVE_SYSCTL && defined HW_PHYSMEM |
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136 | { /* This works on *bsd and darwin. */ |
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137 | unsigned int physmem; |
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138 | size_t len = sizeof physmem; |
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139 | static int mib[2] = { CTL_HW, HW_PHYSMEM }; |
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140 | |||
141 | if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0 |
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142 | && len == sizeof (physmem)) |
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143 | return (double) physmem; |
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144 | } |
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145 | #endif |
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146 | |||
147 | #if HAVE__SYSTEM_CONFIGURATION |
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148 | /* This works on AIX 4.3.3+. */ |
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149 | return _system_configuration.physmem; |
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150 | #endif |
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151 | |||
152 | #if defined _WIN32 |
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153 | { /* this works on windows */ |
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154 | PFN_MS_EX pfnex; |
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155 | HMODULE h = GetModuleHandle ("kernel32.dll"); |
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156 | |||
157 | if (!h) |
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158 | return 0.0; |
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159 | |||
160 | /* Use GlobalMemoryStatusEx if available. */ |
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161 | if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx"))) |
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162 | { |
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163 | lMEMORYSTATUSEX lms_ex; |
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164 | lms_ex.dwLength = sizeof lms_ex; |
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165 | if (!pfnex (&lms_ex)) |
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166 | return 0.0; |
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167 | return (double) lms_ex.ullTotalPhys; |
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168 | } |
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169 | |||
170 | /* Fall back to GlobalMemoryStatus which is always available. |
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171 | but returns wrong results for physical memory > 4GB. */ |
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172 | else |
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173 | { |
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174 | MEMORYSTATUS ms; |
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175 | GlobalMemoryStatus (&ms); |
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176 | return (double) ms.dwTotalPhys; |
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177 | } |
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178 | } |
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179 | #endif |
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180 | |||
181 | /* Return 0 if we can't determine the value. */ |
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182 | return 0; |
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183 | } |
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184 | |||
185 | /* Return the amount of physical memory available. */ |
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186 | double |
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187 | physmem_available (void) |
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188 | { |
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189 | #if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE |
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190 | { /* This works on linux-gnu, solaris2 and cygwin. */ |
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191 | double pages = sysconf (_SC_AVPHYS_PAGES); |
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192 | double pagesize = sysconf (_SC_PAGESIZE); |
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193 | if (0 <= pages && 0 <= pagesize) |
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194 | return pages * pagesize; |
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195 | } |
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196 | #endif |
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197 | |||
198 | #if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC |
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199 | { /* This works on hpux11. */ |
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200 | struct pst_static pss; |
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201 | struct pst_dynamic psd; |
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202 | if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0) |
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203 | && 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0)) |
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204 | { |
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205 | double pages = psd.psd_free; |
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206 | double pagesize = pss.page_size; |
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207 | if (0 <= pages && 0 <= pagesize) |
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208 | return pages * pagesize; |
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209 | } |
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210 | } |
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211 | #endif |
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212 | |||
213 | #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE |
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214 | { /* This works on irix6. */ |
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215 | struct rminfo realmem; |
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216 | if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0) |
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217 | { |
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218 | double pagesize = sysconf (_SC_PAGESIZE); |
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219 | double pages = realmem.availrmem; |
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220 | if (0 <= pages && 0 <= pagesize) |
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221 | return pages * pagesize; |
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222 | } |
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223 | } |
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224 | #endif |
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225 | |||
226 | #if HAVE_TABLE && defined TBL_VMSTATS |
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227 | { /* This works on Tru64 UNIX V4/5. */ |
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228 | struct tbl_vmstats vmstats; |
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229 | |||
230 | if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1) |
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231 | { |
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232 | double pages = vmstats.free_count; |
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233 | double pagesize = vmstats.pagesize; |
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234 | |||
235 | if (0 <= pages && 0 <= pagesize) |
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236 | return pages * pagesize; |
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237 | } |
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238 | } |
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239 | #endif |
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240 | |||
241 | #if HAVE_SYSCTL && defined HW_USERMEM |
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242 | { /* This works on *bsd and darwin. */ |
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243 | unsigned int usermem; |
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244 | size_t len = sizeof usermem; |
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245 | static int mib[2] = { CTL_HW, HW_USERMEM }; |
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246 | |||
247 | if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0 |
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248 | && len == sizeof (usermem)) |
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249 | return (double) usermem; |
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250 | } |
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251 | #endif |
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252 | |||
253 | #if defined _WIN32 |
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254 | { /* this works on windows */ |
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255 | PFN_MS_EX pfnex; |
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256 | HMODULE h = GetModuleHandle ("kernel32.dll"); |
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257 | |||
258 | if (!h) |
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259 | return 0.0; |
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260 | |||
261 | /* Use GlobalMemoryStatusEx if available. */ |
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262 | if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx"))) |
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263 | { |
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264 | lMEMORYSTATUSEX lms_ex; |
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265 | lms_ex.dwLength = sizeof lms_ex; |
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266 | if (!pfnex (&lms_ex)) |
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267 | return 0.0; |
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268 | return (double) lms_ex.ullAvailPhys; |
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269 | } |
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270 | |||
271 | /* Fall back to GlobalMemoryStatus which is always available. |
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272 | but returns wrong results for physical memory > 4GB */ |
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273 | else |
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274 | { |
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275 | MEMORYSTATUS ms; |
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276 | GlobalMemoryStatus (&ms); |
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277 | return (double) ms.dwAvailPhys; |
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278 | } |
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279 | } |
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280 | #endif |
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281 | |||
282 | /* Guess 25% of physical memory. */ |
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283 | return physmem_total () / 4; |
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284 | } |
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285 | |||
286 | |||
287 | #if DEBUG |
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288 | |||
289 | # include |
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290 | # include |
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291 | |||
292 | int |
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293 | main (void) |
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294 | { |
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295 | printf ("%12.f %12.f\n", physmem_total (), physmem_available ()); |
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296 | exit (0); |
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297 | } |
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298 | |||
299 | #endif /* DEBUG */ |
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300 | |||
301 | /* |
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302 | Local Variables: |
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303 | compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c" |
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304 | End: |
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305 | */=>=>=>=>=>=>=>=>=>=>=>=>=>=>=>=>=>=> |