add sys_memsize_virtual and sys_memsize_physical info cvars

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@10452 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/zone.c b/zone.c
index 692879c7d532db90a6212cd6b7566a86a4c64349..e90df30bff1283333b035af9e8cea2f007c527b4 100644 (file)
--- a/zone.c
+++ b/zone.c
@@ -81,6 +81,8 @@ static memclump_t *clumpchain = NULL;
 
 cvar_t developer_memory = {0, "developer_memory", "0", "prints debugging information about memory allocations"};
 cvar_t developer_memorydebug = {0, "developer_memorydebug", "0", "enables memory corruption checks (very slow)"};
+cvar_t sys_memsize_physical = {CVAR_READONLY, "sys_memsize_physical", "", "physical memory size in MB (or empty if unknown)"};
+cvar_t sys_memsize_virtual = {CVAR_READONLY, "sys_memsize_virtual", "", "virtual memory size in MB (or empty if unknown)"};
 
 static mempool_t *poolchain = NULL;
 
@@ -877,5 +879,55 @@ void Memory_Init_Commands (void)
        Cmd_AddCommand ("memlist", MemList_f, "prints memory pool information (or if used as memlist 5 lists individual allocations of 5K or larger, 0 lists all allocations)");
        Cvar_RegisterVariable (&developer_memory);
        Cvar_RegisterVariable (&developer_memorydebug);
+       Cvar_RegisterVariable (&sys_memsize_physical);
+       Cvar_RegisterVariable (&sys_memsize_virtual);
+
+#if defined(WIN32)
+       {
+               MEMORYSTATUSEX status;
+               // first guess
+               Cvar_SetQuick(&sys_memsize_virtual, (sizeof(void*) == 4) ? 2048 : 8388608);
+               // then improve
+               status.dwLength = sizeof(status);
+               if(!GlobalMemoryStatusEx(&status))
+               {
+                       Cvar_SetValueQuick(&sys_memsize_physical, status.ullTotalPhys / 1048576.0);
+                       Cvar_SetValueQuick(&sys_memsize_virtual, min(sys_memsize_virtual.value, status.ullTotalVirtual / 1048576.0));
+               }
+       }
+#else
+       {
+               // first guess
+               Cvar_SetValueQuick(&sys_memsize_virtual, (sizeof(void*) == 4) ? 2048 : 268435456);
+               // then improve
+               {
+                       // Linux, and BSD with linprocfs mounted
+                       FILE *f = fopen("/proc/meminfo", "r");
+                       if(f)
+                       {
+                               static char buf[1024];
+                               while(fgets(buf, sizeof(buf), f))
+                               {
+                                       const char *p = buf;
+                                       if(!COM_ParseToken_Console(&p))
+                                               continue;
+                                       if(!strcmp(com_token, "MemTotal:"))
+                                       {
+                                               if(!COM_ParseToken_Console(&p))
+                                                       continue;
+                                               Cvar_SetValueQuick(&sys_memsize_physical, atof(com_token) / 1024.0);
+                                       }
+                                       if(!strcmp(com_token, "SwapTotal:"))
+                                       {
+                                               if(!COM_ParseToken_Console(&p))
+                                                       continue;
+                                               Cvar_SetValueQuick(&sys_memsize_virtual, min(sys_memsize_virtual.value , atof(com_token) / 1024.0 + sys_memsize_physical.value));
+                                       }
+                               }
+                               fclose(f);
+                       }
+               }
+       }
+#endif
 }