IAEAphsp/include/IAEASourceIdRegistry.hh

0001 //
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0025 //
0026
0027 #ifndef IAEASourceIdRegistry_hh
0028 #define IAEASourceIdRegistry_hh 1
0029
0030 #include <bitset>
0031 #include "G4AutoLock.hh"
0032 #include "globals.hh"
0033
0034 constexpr G4int kIAEA_MaxSources = 30;  // MAX_NUM_SOURCES
0035
0036 class IAEASourceIdRegistry {
0037
0038 public:
0039
0040   static IAEASourceIdRegistry& Instance() {
0041     static IAEASourceIdRegistry inst;
0042     return inst;
0043   }
0044
0045   // Reserve the next free ID (lowest or highest; your choice)
0046   G4int ReserveNextLowest() {
0047     G4AutoLock lock(&fMutex);
0048     for (G4int ii = 0; ii < kIAEA_MaxSources; ii++) {
0049       if (!fUsed.test(ii)) {
0050     fUsed.set(ii);
0051     return ii;
0052       }
0053     }
0054     return -1; // none free
0055   }
0056
0057   // Reserve a specific ID (returns true if we could mark it)
0058   bool ReserveExact(G4int id) {
0059     if (id < 0 || id >= kIAEA_MaxSources)  return false;
0060     G4AutoLock lock(&fMutex);
0061     if (fUsed.test(id))  return false;
0062     fUsed.set(id);
0063     return true;
0064   }
0065
0066   void Release(G4int id) {
0067     if (id < 0 || id >= kIAEA_MaxSources) return;
0068     G4AutoLock lock(&fMutex);
0069     fUsed.reset(id);
0070   }
0071
0072
0073 private:
0074
0075   IAEASourceIdRegistry() = default;
0076   IAEASourceIdRegistry(const IAEASourceIdRegistry&) = delete;
0077   IAEASourceIdRegistry& operator=(const IAEASourceIdRegistry&) = delete;
0078
0079   std::bitset<kIAEA_MaxSources> fUsed;
0080   G4Mutex fMutex = G4MUTEX_INITIALIZER;
0081 };
0082
0083 #endif