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1 | #ifndef _GLOBALHEAP_H_ |
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2 | #define _GLOBALHEAP_H_ |
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3 | |
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4 | #include "hoardsuperblock.h" |
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5 | #include "processheap.h" |
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6 | |
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7 | namespace Hoard { |
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8 | |
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9 | template <size_t SuperblockSize, |
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10 | int EmptinessClasses, |
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11 | class LockType> |
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12 | class GlobalHeap { |
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13 | |
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14 | class bogusThresholdFunctionClass { |
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15 | public: |
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16 | static inline bool function (int, int, size_t) { |
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17 | // We *never* cross the threshold for a process heap. |
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18 | return false; |
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19 | } |
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20 | }; |
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21 | |
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22 | public: |
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23 | |
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24 | GlobalHeap (void) |
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25 | : theHeap (getHeap()) |
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26 | { |
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27 | } |
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28 | |
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29 | typedef ProcessHeap<SuperblockSize, EmptinessClasses, LockType, bogusThresholdFunctionClass> SuperHeap; |
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30 | typedef HoardSuperblock<LockType, SuperblockSize, GlobalHeap> SuperblockType; |
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31 | |
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32 | void put (void * s, size_t sz) { |
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33 | assert (s); |
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34 | assert (((SuperblockType *) s)->isValidSuperblock()); |
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35 | theHeap->put ((typename SuperHeap::SuperblockType *) s, |
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36 | sz); |
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37 | } |
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38 | |
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39 | SuperblockType * get (size_t sz, void * dest) { |
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40 | SuperblockType * s = |
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41 | reinterpret_cast<SuperblockType *> |
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42 | (theHeap->get (sz, reinterpret_cast<SuperHeap *>(dest))); |
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43 | if (s) { |
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44 | assert (s->isValidSuperblock()); |
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45 | } |
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46 | return s; |
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47 | } |
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48 | |
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49 | private: |
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50 | |
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51 | SuperHeap * theHeap; |
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52 | |
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53 | inline static SuperHeap * getHeap (void) { |
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54 | static double theHeapBuf[sizeof(SuperHeap) / sizeof(double) + 1]; |
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55 | static SuperHeap * theHeap = new (&theHeapBuf[0]) SuperHeap; |
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56 | return theHeap; |
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57 | } |
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58 | |
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59 | // Prevent copying. |
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60 | GlobalHeap (const GlobalHeap&); |
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61 | GlobalHeap& operator=(const GlobalHeap&); |
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62 | |
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63 | }; |
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64 | |
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65 | }; |
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66 | |
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67 | #endif |
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