-bool EmergeThread::getBlockOrStartGen(v3s16 p, MapBlock **b,
- BlockMakeData *data, bool allow_gen) {
- v2s16 p2d(p.X, p.Z);
- //envlock: usually takes <=1ms, sometimes 90ms or ~400ms to acquire
- JMutexAutoLock envlock(m_server->m_env_mutex);
+EmergeAction EmergeThread::getBlockOrStartGen(
+ const v3s16 &pos, bool allow_gen, MapBlock **block, BlockMakeData *bmdata)
+{
+ MutexAutoLock envlock(m_server->m_env_mutex);
+
+ // 1). Attempt to fetch block from memory
+ *block = m_map->getBlockNoCreateNoEx(pos);
+ if (*block && !(*block)->isDummy()) {
+ if ((*block)->isGenerated())
+ return EMERGE_FROM_MEMORY;
+ } else {
+ // 2). Attempt to load block from disk if it was not in the memory
+ *block = m_map->loadBlock(pos);
+ if (*block && (*block)->isGenerated())
+ return EMERGE_FROM_DISK;
+ }
+
+ // 3). Attempt to start generation
+ if (allow_gen && m_map->initBlockMake(pos, bmdata))
+ return EMERGE_GENERATED;
+
+ // All attempts failed; cancel this block emerge
+ return EMERGE_CANCELLED;
+}
+
+
+MapBlock *EmergeThread::finishGen(v3s16 pos, BlockMakeData *bmdata,
+ std::map<v3s16, MapBlock *> *modified_blocks)
+{
+ MutexAutoLock envlock(m_server->m_env_mutex);
+ ScopeProfiler sp(g_profiler,
+ "EmergeThread: after Mapgen::makeChunk", SPT_AVG);