6 #include "server/database.h"
7 #include "server/mapgen.h"
8 #include "server/server_config.h"
9 #include "server/server_map.h"
10 #include "signal_handlers.h"
13 struct ServerMap server_map;
14 static Server *server;
18 // send a block to a client and reset block request
19 static void send_block(Client *client, MapBlock *block)
21 MapBlockExtraData *extra = block->extra;
23 pthread_mutex_lock(&client->mtx);
24 if (client->state == CS_ACTIVE)
25 (void) (write_u32(client->fd, CC_BLOCK)
26 && write_v3s32(client->fd, block->pos)
27 && write_u64(client->fd, extra->size)
28 && write_u64(client->fd, extra->rawsize)
29 && write(client->fd, extra->data, extra->size) != -1);
30 pthread_mutex_unlock(&client->mtx);
33 // send block to near clients
34 // block mutex has to be locked
35 static void send_block_to_near(MapBlock *block)
37 MapBlockExtraData *extra = block->extra;
39 if (extra->state == MBS_GENERATING)
45 map_serialize_block(block, &extra->data, &extra->size, &extra->rawsize);
46 database_save_block(block);
48 if (extra->state == MBS_CREATED)
51 pthread_rwlock_rdlock(&server->players_rwlck);
52 ITERATE_LIST(&server->players, pair) {
53 Client *client = pair->value;
55 if (within_simulation_distance(client->pos, block->pos, server_config.simulation_distance))
56 send_block(client, block);
58 pthread_rwlock_unlock(&server->players_rwlck);
61 // list_clear_func callback for sending changed blocks to near clients
62 static void list_send_block(void *key, unused void *value, unused void *arg)
64 MapBlock *block = key;
66 pthread_mutex_lock(&block->mtx);
67 send_block_to_near(block);
68 pthread_mutex_unlock(&block->mtx);
71 // pthread start routine for mapgen thread
72 static void *mapgen_thread(void *arg)
74 MapBlock *block = arg;
75 MapBlockExtraData *extra = block->extra;
77 pthread_mutex_lock(&block->mtx);
78 extra->state = MBS_GENERATING;
79 pthread_mutex_unlock(&block->mtx);
81 List changed_blocks = list_create(NULL);
82 list_put(&changed_blocks, block, NULL);
84 mapgen_generate_block(block, &changed_blocks);
86 pthread_mutex_lock(&block->mtx);
87 extra->state = MBS_READY;
88 pthread_mutex_unlock(&block->mtx);
90 list_clear_func(&changed_blocks, &list_send_block, NULL);
92 pthread_mutex_lock(&server_map.joining_threads_mtx);
93 if (! server_map.joining_threads) {
94 pthread_mutex_lock(&server_map.mapgen_threads_mtx);
95 list_delete(&server_map.mapgen_threads, &extra->mapgen_thread);
96 pthread_mutex_unlock(&server_map.mapgen_threads_mtx);
98 pthread_mutex_unlock(&server_map.joining_threads_mtx);
103 // launch mapgen thread for block
104 // block mutex has to be locked
105 static void launch_mapgen_thread(MapBlock *block)
107 pthread_mutex_lock(&server_map.mapgen_threads_mtx);
108 pthread_t *thread_ptr = &((MapBlockExtraData *) block->extra)->mapgen_thread;
109 pthread_create(thread_ptr, NULL, mapgen_thread, block);
110 list_put(&server_map.mapgen_threads, thread_ptr, NULL);
111 pthread_mutex_unlock(&server_map.mapgen_threads_mtx);
114 // list_clear_func callback used to join running generator threads on shutdown
115 static void list_join_thread(void *key, unused void *value, unused void *arg)
117 pthread_join(*(pthread_t *) key, NULL);
121 // note: all these functions require the block mutex to be locked, which is always the case when a map callback is invoked
123 // callback for initializing a newly created block
124 // load block from database or initialize state, mgstage buffer and data
125 static void on_create_block(MapBlock *block)
127 MapBlockExtraData *extra = block->extra = malloc(sizeof(MapBlockExtraData));
129 if (! database_load_block(block)) {
130 extra->state = MBS_CREATED;
134 block->data[x][y][z] = map_node_create(NODE_AIR, NULL, 0);
135 extra->mgs_buffer[x][y][z] = MGS_VOID;
140 // callback for deleting a block
142 static void on_delete_block(MapBlock *block)
144 MapBlockExtraData *extra = block->extra;
152 // callback for determining whether a block should be returned by map_get_block
153 // hold back blocks that are not fully generated except when the create flag is set to true
154 static bool on_get_block(MapBlock *block, bool create)
156 MapBlockExtraData *extra = block->extra;
158 if (extra->state < MBS_READY && ! create)
164 // callback for deciding whether a set_node call succeeds or not
165 // reject set_node calls that try to override nodes placed by later mapgen stages, else update mgs buffer - also make sure block is inserted into changed blocks list
166 static bool on_set_node(MapBlock *block, v3u8 offset, unused MapNode *node, void *arg)
168 MapgenSetNodeArg *msn_arg = arg;
177 MapgenStage *old_mgs = &((MapBlockExtraData *) block->extra)->mgs_buffer[offset.x][offset.y][offset.z];
179 if (mgs >= *old_mgs) {
183 list_put(msn_arg->changed_blocks, block, NULL);
191 // callback for when a block changes
192 // send block to near clients if not part of map generation
193 static void on_after_set_node(MapBlock *block, unused v3u8 offset, void *arg)
196 send_block_to_near(block);
199 // join all map generation threads
200 static void join_mapgen_threads()
202 pthread_mutex_lock(&server_map.joining_threads_mtx);
203 server_map.joining_threads = true;
204 pthread_mutex_unlock(&server_map.joining_threads_mtx);
206 pthread_mutex_lock(&server_map.mapgen_threads_mtx);
207 list_clear_func(&server_map.mapgen_threads, &list_join_thread, NULL);
208 pthread_mutex_unlock(&server_map.mapgen_threads_mtx);
210 pthread_mutex_lock(&server_map.joining_threads_mtx);
211 server_map.joining_threads = false;
212 pthread_mutex_unlock(&server_map.joining_threads_mtx);
215 // generate a hut for new players to spawn in
216 static void generate_spawn_hut()
218 f32 wood_color[3] = {0.11f, 1.0f, 0.29f};
219 List changed_blocks = list_create(NULL);
221 for (s32 x = -4; x <= +4; x++) {
222 for (s32 y = 0; y <= 3; y++) {
223 for (s32 z = -3; z <= +2; z++) {
224 mapgen_set_node((v3s32) {x, server_map.spawn_height + y, z}, map_node_create(NODE_AIR, NULL, 0), MGS_PLAYER, &changed_blocks);
229 for (s32 x = -5; x <= +5; x++) {
230 for (s32 z = -4; z <= +3; z++) {
231 mapgen_set_node((v3s32) {x, server_map.spawn_height - 1, z}, map_node_create(NODE_OAK_WOOD, wood_color, sizeof wood_color), MGS_PLAYER, &changed_blocks);
232 mapgen_set_node((v3s32) {x, server_map.spawn_height + 4, z}, map_node_create(NODE_OAK_WOOD, wood_color, sizeof wood_color), MGS_PLAYER, &changed_blocks);
236 for (s32 y = 0; y <= 3; y++) {
237 for (s32 x = -5; x <= +5; x++) {
238 mapgen_set_node((v3s32) {x, server_map.spawn_height + y, -4}, map_node_create(((y == 1 || y == 2) && ((x >= -3 && x <= -1) || (x >= +1 && x <= +2))) ? NODE_AIR : NODE_OAK_WOOD, wood_color, sizeof(f32) * 3), MGS_PLAYER, &changed_blocks);
239 mapgen_set_node((v3s32) {x, server_map.spawn_height + y, +3}, map_node_create(((y == 1 || y == 2) && ((x >= -3 && x <= -2) || (x >= +1 && x <= +3))) ? NODE_AIR : NODE_OAK_WOOD, wood_color, sizeof(f32) * 3), MGS_PLAYER, &changed_blocks);
243 for (s32 y = 0; y <= 3; y++) {
244 for (s32 z = -3; z <= +2; z++) {
245 mapgen_set_node((v3s32) {-5, server_map.spawn_height + y, z}, map_node_create(NODE_OAK_WOOD, wood_color, sizeof(f32) * 3), MGS_PLAYER, &changed_blocks);
246 mapgen_set_node((v3s32) {+5, server_map.spawn_height + y, z}, map_node_create(((y != 3) && (z == -1 || z == +0)) ? NODE_AIR : NODE_OAK_WOOD, wood_color, sizeof(f32) * 3), MGS_PLAYER, &changed_blocks);
259 for (int i = 0; i < 6; i++) {
260 for (s32 y = server_map.spawn_height - 2;; y--) {
261 v3s32 pos = {posts[i].x, y, posts[i].y};
262 Node node = map_get_node(server_map.map, pos).type;
265 if (node != NODE_AIR)
271 if (node_definitions[node].solid)
274 mapgen_set_node(pos, map_node_create(node == NODE_LAVA ? NODE_VULCANO_STONE : NODE_OAK_WOOD, wood_color, sizeof(f32) * 3), MGS_PLAYER, &changed_blocks);
278 list_clear_func(&changed_blocks, &list_send_block, NULL);
283 // ServerMap singleton constructor
284 void server_map_init(Server *srv)
288 server_map.map = map_create((MapCallbacks) {
289 .create_block = &on_create_block,
290 .delete_block = &on_delete_block,
291 .get_block = &on_get_block,
292 .set_node = &on_set_node,
293 .after_set_node = &on_after_set_node,
295 server_map.joining_threads = false;
296 server_map.mapgen_threads = list_create(NULL);
297 pthread_mutex_init(&server_map.joining_threads_mtx, NULL);
298 pthread_mutex_init(&server_map.mapgen_threads_mtx, NULL);
301 // ServerMap singleton destructor
302 void server_map_deinit()
304 join_mapgen_threads();
305 pthread_mutex_destroy(&server_map.joining_threads_mtx);
306 pthread_mutex_destroy(&server_map.mapgen_threads_mtx);
307 map_delete(server_map.map);
310 // handle block request from client (thread safe)
311 void server_map_requested_block(Client *client, v3s32 pos)
313 if (within_simulation_distance(client->pos, pos, server_config.simulation_distance)) {
314 MapBlock *block = map_get_block(server_map.map, pos, true);
316 pthread_mutex_lock(&block->mtx);
317 MapBlockExtraData *extra = block->extra;
319 switch (extra->state) {
321 launch_mapgen_thread(block);
328 send_block(client, block);
330 pthread_mutex_unlock(&block->mtx);
334 // prepare spawn region
335 void server_map_prepare_spawn()
338 s32 dist = server_config.simulation_distance;
339 s32 total = (dist * 2 + 1);
340 total *= total * total;
341 s32 last_percentage = -1;
343 for (s32 x = -dist; x <= (s32) dist; x++) {
344 for (s32 y = -dist; y <= (s32) dist; y++) {
345 for (s32 z = -dist; z <= (s32) dist; z++) {
347 join_mapgen_threads();
351 MapBlock *block = map_get_block(server_map.map, (v3s32) {x, y, z}, true);
353 pthread_mutex_lock(&block->mtx);
354 if (((MapBlockExtraData *) block->extra)->state == MBS_CREATED)
355 launch_mapgen_thread(block);
356 pthread_mutex_unlock(&block->mtx);
360 s32 percentage = 100.0 * done / total;
362 if (percentage > last_percentage) {
363 last_percentage = percentage;
364 printf("Preparing spawn... %d%%\n", percentage);
370 join_mapgen_threads();
372 s64 saved_spawn_height;
373 if (database_load_meta("spawn_height", &saved_spawn_height)) {
374 server_map.spawn_height = saved_spawn_height;
376 s32 spawn_height = -1;
378 while (map_get_node(server_map.map, (v3s32) {0, ++spawn_height, 0}).type != NODE_AIR)
381 server_map.spawn_height = spawn_height + 5;
382 generate_spawn_hut();
383 database_save_meta("spawn_height", server_map.spawn_height);