[2455] | 1 | #ifndef __TOKEN_MANAGER_HPP__ |
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| 2 | #define __TOKEN_MANAGER_HPP__ |
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| 3 | |
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| 4 | #include "xios_spl.hpp" |
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| 5 | #include "exception.hpp" |
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| 6 | #include "mpi.hpp" |
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| 7 | |
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| 8 | namespace xios |
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| 9 | { |
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| 10 | |
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| 11 | class CTokenManager |
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| 12 | { |
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| 13 | |
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| 14 | public: |
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| 15 | CTokenManager(MPI_Comm& comm, int leader) : leader_(leader) |
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| 16 | { |
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| 17 | int commRank ; |
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| 18 | MPI_Comm_rank(comm, &commRank) ; |
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| 19 | MPI_Aint size = 0 ; |
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| 20 | if (leader_== commRank) size = sizeof(size_t) ; |
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[2504] | 21 | const MPI_Aint windowSize=sizeof(size_t); |
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| 22 | MPI_Win_allocate(windowSize, 1, MPI_INFO_NULL, comm, &winBufferCurrent_, &winCurrentToken_) ; |
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| 23 | MPI_Win_allocate(windowSize, 1, MPI_INFO_NULL, comm, &winBufferRetrieved_, &winRetrievedToken_) ; |
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[2455] | 24 | } |
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| 25 | |
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| 26 | size_t getToken(void) |
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| 27 | { |
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| 28 | size_t inc=1 ; |
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| 29 | size_t token ; |
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| 30 | MPI_Win_lock(MPI_LOCK_EXCLUSIVE, leader_, 0, winCurrentToken_) ; |
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| 31 | MPI_Fetch_and_op(&inc, &token, MPI_SIZE_T, leader_, 0, MPI_SUM, winCurrentToken_) ; |
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| 32 | MPI_Win_unlock(leader_, winCurrentToken_) ; |
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| 33 | return token ; |
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| 34 | } |
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| 35 | |
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| 36 | bool lockToken(size_t token) |
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| 37 | { |
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| 38 | size_t tokenRead ; |
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| 39 | MPI_Win_lock(MPI_LOCK_SHARED, leader_, 0, winRetrievedToken_) ; |
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| 40 | MPI_Get(&tokenRead, 1, MPI_SIZE_T, leader_, 0, 1, MPI_SIZE_T, winRetrievedToken_ ) ; |
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| 41 | MPI_Win_unlock(leader_, winRetrievedToken_) ; |
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| 42 | if (token==tokenRead) return true ; |
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| 43 | else return false ; |
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| 44 | } |
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| 45 | |
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| 46 | void unlockToken(size_t token) |
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| 47 | { |
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| 48 | size_t inc=1 ; |
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| 49 | size_t tokenRead ; |
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| 50 | MPI_Win_lock(MPI_LOCK_EXCLUSIVE, leader_, 0, winRetrievedToken_) ; |
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| 51 | MPI_Fetch_and_op(&inc, &tokenRead, MPI_SIZE_T, leader_, 0, MPI_SUM, winRetrievedToken_) ; |
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| 52 | MPI_Win_unlock(leader_, winRetrievedToken_) ; |
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| 53 | |
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| 54 | if (token!=tokenRead) ERROR("void CTokenManager::unlockToken(size_t token)",<<"Cannot release token="<<token<< |
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| 55 | " that is not corresponding to the locked token="<<tokenRead) ; |
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| 56 | } |
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| 57 | |
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| 58 | private: |
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| 59 | |
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| 60 | MPI_Win winCurrentToken_ ; |
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| 61 | MPI_Win winRetrievedToken_ ; |
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[2504] | 62 | void* winBufferCurrent_ ; |
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| 63 | void* winBufferRetrieved_ ; |
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| 64 | |
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[2455] | 65 | int leader_ ; |
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| 66 | |
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| 67 | size_t currentToken_=0 ; |
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| 68 | size_t retrievedToken_=0 ; |
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| 69 | |
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| 70 | |
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| 71 | } ; |
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| 72 | |
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| 73 | |
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| 74 | } |
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| 75 | |
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[2504] | 76 | #endif |
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