apps/kinfocenter/memory/memory_linux.cpp

   1 #include <sys/sysinfo.h>
   2 #include <unistd.h>
   3 #include <stdlib.h>
   4 #include <QFile>
   5
   6 void KCMMemory::fetchValues()
   7 {
   8   struct sysinfo info;
   9
  10   sysinfo(&info);       /* Get Information from system... */
  11
  12   /*
  13    * The sysinfo.mem_unit member variable is not available in older 2.4 kernels.
  14    * If you have troubles compiling this code, set mem_unit to "1".
  15    */
  16
  17   const int mem_unit = info.mem_unit;
  18
  19   memoryInfos[TOTAL_MEM]    = MEMORY(info.totalram)  * mem_unit; // total physical memory (without swaps)
  20   memoryInfos[FREE_MEM]     = MEMORY(info.freeram)   * mem_unit; // total free physical memory (without swaps)
  21   memoryInfos[SHARED_MEM]   = MEMORY(info.sharedram) * mem_unit;
  22   memoryInfos[BUFFER_MEM]   = MEMORY(info.bufferram) * mem_unit;
  23   memoryInfos[SWAP_MEM]     = MEMORY(info.totalswap) * mem_unit; // total size of all swap-partitions
  24   memoryInfos[FREESWAP_MEM] = MEMORY(info.freeswap)  * mem_unit; // free memory in swap-partitions
  25
  26   QFile file("/proc/meminfo");
  27   if (file.open(QIODevice::ReadOnly)) {
  28         char buf[512];
  29         while (file.readLine(buf, sizeof(buf) - 1) > 0) {
  30                 if (strncmp(buf,"Cached:",7)==0) {
  31                         unsigned long v;
  32                         v = strtoul(&buf[7],NULL,10);
  33                         memoryInfos[CACHED_MEM] = MEMORY(v) * 1024; // Cached memory in RAM
  34                         break;
  35                 }
  36         }
  37         file.close();
  38   }
  39 }
  40