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namespace oopse { |
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BlockSnapshotManager::BlockSnapshotManager(SimInfo* info, const std::string& filename, |
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int storageLayout, int blockCapacity) |
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< |
: SnapshotManager(storageLayout), info_(info), blockCapacity_(blockCapacity), activeBlocks_(blockCapacity_, -1) { |
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> |
: SnapshotManager(storageLayout), info_(info), blockCapacity_(blockCapacity), |
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> |
activeBlocks_(blockCapacity_, -1), activeRefCount_(blockCapacity_, 0) { |
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|
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nAtoms_ = info->getNGlobalAtoms(); |
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nRigidBodies_ = info->getNGlobalRigidBodies(); |
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#endif |
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} |
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|
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– |
bool BlockSnapshotManager::isBlockActive(int block) { |
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return std::find(activeBlocks_.begin(), activeBlocks_.end(), block) != activeBlocks_.end() ? true : false; |
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} |
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|
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+ |
|
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bool BlockSnapshotManager::loadBlock(int block) { |
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std::vector<int>::iterator i = findActiveBlock(block); |
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bool loadSuccess; |
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< |
if (isBlockActive(block)) { |
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> |
if (i != activeBlocks_.end()) { |
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> |
//if block is already in memory, just increast the reference count |
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> |
++activeRefCount_[i - activeBlocks_.begin()]; |
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loadSuccess = true; |
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} else if (getNActiveBlocks() < blockCapacity_){ |
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< |
|
| 121 |
< |
for (int i = blocks_[block].first; i < blocks_[block].second; ++i) { |
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< |
snapshots_[i] = loadFrame(i); |
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< |
} |
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< |
|
| 123 |
< |
std::vector<int>::iterator j; |
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< |
j = std::find(activeBlocks_.begin(), activeBlocks_.end(), -1); |
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< |
assert(j != activeBlocks_.end()); |
| 126 |
< |
*j = block; |
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> |
//if number of active blocks is less than the block capacity, just load it |
| 121 |
> |
internalLoad(block); |
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loadSuccess = true; |
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< |
}else { |
| 123 |
> |
} else if (hasZeroRefBlock() > 0) { |
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> |
//if already reach the block capacity, need to unload a block with 0 reference |
| 125 |
> |
int zeroRefBlock = getFirstZeroRefBlock(); |
| 126 |
> |
assert(zeroRefBlock != -1); |
| 127 |
> |
internalUnload(zeroRefBlock); |
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> |
internalLoad(block); |
| 129 |
> |
} else { |
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> |
//reach the capacity and all blocks in memory are not zero reference |
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loadSuccess = false; |
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} |
| 133 |
< |
|
| 133 |
> |
|
| 134 |
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return loadSuccess; |
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} |
| 136 |
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|
| 137 |
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bool BlockSnapshotManager::unloadBlock(int block) { |
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bool unloadSuccess; |
| 139 |
< |
if (!isBlockActive(block)){ |
| 140 |
< |
unloadSuccess = false; |
| 141 |
< |
} else { |
| 142 |
< |
for (int i = blocks_[block].first; i < blocks_[block].second; ++i) { |
| 143 |
< |
delete snapshots_[i]; |
| 144 |
< |
snapshots_[i] = NULL; |
| 139 |
> |
std::vector<int>::iterator i = findActiveBlock(block); |
| 140 |
> |
|
| 141 |
> |
if (i != activeBlocks_.end()){ |
| 142 |
> |
--activeRefCount_[i - activeBlocks_.begin()]; |
| 143 |
> |
if (activeRefCount_[i - activeBlocks_.begin()] < 0) { |
| 144 |
> |
//in case, unloadBlock called multiple times |
| 145 |
> |
activeRefCount_[i - activeBlocks_.begin()] = 0; |
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} |
| 147 |
< |
std::vector<int>::iterator j; |
| 145 |
< |
j = std::find(activeBlocks_.begin(), activeBlocks_.end(), block); |
| 146 |
< |
assert(j != activeBlocks_.end()); |
| 147 |
< |
*j = -1; |
| 147 |
> |
|
| 148 |
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unloadSuccess = true; |
| 149 |
+ |
} else { |
| 150 |
+ |
unloadSuccess = false; |
| 151 |
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} |
| 152 |
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|
| 153 |
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return unloadSuccess; |
| 154 |
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} |
| 155 |
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|
| 156 |
+ |
void BlockSnapshotManager::internalLoad(int block) { |
| 157 |
+ |
|
| 158 |
+ |
for (int i = blocks_[block].first; i < blocks_[block].second; ++i) { |
| 159 |
+ |
snapshots_[i] = loadFrame(i); |
| 160 |
+ |
} |
| 161 |
+ |
|
| 162 |
+ |
std::vector<int>::iterator j; |
| 163 |
+ |
j = std::find(activeBlocks_.begin(), activeBlocks_.end(), -1); |
| 164 |
+ |
assert(j != activeBlocks_.end()); |
| 165 |
+ |
*j = block; |
| 166 |
+ |
++activeRefCount_[j - activeBlocks_.begin()]; |
| 167 |
+ |
} |
| 168 |
+ |
|
| 169 |
+ |
void BlockSnapshotManager::internalUnload(int block) { |
| 170 |
+ |
for (int i = blocks_[block].first; i < blocks_[block].second; ++i) { |
| 171 |
+ |
delete snapshots_[i]; |
| 172 |
+ |
snapshots_[i] = NULL; |
| 173 |
+ |
} |
| 174 |
+ |
std::vector<int>::iterator j; |
| 175 |
+ |
j = std::find(activeBlocks_.begin(), activeBlocks_.end(), block); |
| 176 |
+ |
assert(j != activeBlocks_.end()); |
| 177 |
+ |
*j = -1; |
| 178 |
+ |
} |
| 179 |
+ |
|
| 180 |
+ |
bool BlockSnapshotManager::hasZeroRefBlock(){ |
| 181 |
+ |
return std::find(activeRefCount_.begin(), activeRefCount_.end(), 0); |
| 182 |
+ |
} |
| 183 |
+ |
|
| 184 |
+ |
int BlockSnapshotManager::getFirstZeroRefBlock(){ |
| 185 |
+ |
std::vector<int>::iterator i = std::find(activeRefCount_.begin(), activeRefCount_.end(), 0); |
| 186 |
+ |
return i != activeRefCount_.end() ? activeBlocks_[i - activeRefCount_.begin()] : -1; |
| 187 |
+ |
} |
| 188 |
+ |
|
| 189 |
|
std::vector<int> BlockSnapshotManager::getActiveBlocks() { |
| 190 |
|
std::vector<int> result; |
| 191 |
|
oopse::copy_if(activeBlocks_.begin(), activeBlocks_.end(), std::back_inserter(result), |
