src/CpuAffinitySet.h

   1 /*
   2  * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #ifndef SQUID_CPU_AFFINITY_SET_H
  10 #define SQUID_CPU_AFFINITY_SET_H
  11
  12 #include "compat/cpu.h"
  13
  14 /// cpu affinity management for a single process
  15 class CpuAffinitySet
  16 {
  17 public:
  18     CpuAffinitySet();
  19
  20     /// set CPU affinity for this process
  21     void apply();
  22
  23     /// undo CPU affinity changes for this process
  24     void undo();
  25
  26     /// whether apply() was called and was not undone
  27     bool applied();
  28
  29     /// set CPU affinity mask
  30     void set(const cpu_set_t &aCpuSet);
  31
  32 private:
  33     cpu_set_t theCpuSet; ///< configured CPU affinity for this process
  34     cpu_set_t theOrigCpuSet; ///< CPU affinity for this process before apply()
  35 };
  36
  37 #endif // SQUID_CPU_AFFINITY_SET_H
  38