distributed/protocol.h

   1 #ifndef PACHI_DISTRIBUTED_PROTOCOL_H
   2 #define PACHI_DISTRIBUTED_PROTOCOL_H
   3
   4 #include <sys/socket.h>
   5 #include <arpa/inet.h>
   6
   7 #include "board.h"
   8
   9
  10 /* Each slave thread maintains a ring of 256 buffers holding
  11  * incremental stats received from the slave. The oldest
  12  * buffer is recycled to hold stats sent to the slave and
  13  * received the next reply. */
  14 #define BUFFERS_PER_SLAVE_BITS 8
  15 #define BUFFERS_PER_SLAVE (1 << BUFFERS_PER_SLAVE_BITS)
  16
  17 struct slave_state;
  18 typedef void (*buffer_hook)(void *buf, int size);
  19 typedef void (*state_alloc_hook)(struct slave_state *sstate);
  20 typedef int (*getargs_hook)(void *buf, struct slave_state *sstate, int cmd_id);
  21
  22 struct buf_state {
  23         void *buf;
  24         /* All buffers have the same physical size. size is the
  25          * number of valid bytes. It is set only when the buffer
  26          * is actually in the receive queueue. */
  27         int size;
  28         int queue_index;
  29         int owner;
  30 };
  31
  32 struct slave_state {
  33         int max_buf_size;
  34         int thread_id;
  35         struct in_addr client; // for debugging only
  36         state_alloc_hook alloc_hook;
  37         buffer_hook insert_hook;
  38         getargs_hook args_hook;
  39
  40         /* Index in received_queue of most recent processed
  41          * buffer, -1 if none processed yet. */
  42         int last_processed;
  43
  44         /* --- PRIVATE DATA for protocol.c --- */
  45
  46         struct buf_state b[BUFFERS_PER_SLAVE];
  47         int newest_buf;
  48         int slave_sock;
  49
  50         /* --- PRIVATE DATA for merge.c --- */
  51
  52         /* Hash table of incremental stats. */
  53         struct incr_stats *stats_htable;
  54         int stats_hbits;
  55         int stats_id;
  56
  57         /* Hash indices updated by stats merge. */
  58         int *merged;
  59         int max_merged_nodes;
  60 };
  61 extern struct slave_state default_sstate;
  62
  63 void protocol_lock(void);
  64 void protocol_unlock(void);
  65
  66 void logline(struct in_addr *client, char *prefix, char *s);
  67
  68 void clear_receive_queue(void);
  69 void update_cmd(struct board *b, char *cmd, char *args, bool new_id);
  70 void new_cmd(struct board *b, char *cmd, char *args);
  71 void get_replies(double time_limit, int min_replies);
  72 void protocol_init(char *slave_port, char *proxy_port, int max_slaves);
  73
  74 extern int reply_count;
  75 extern char **gtp_replies;
  76 extern int active_slaves;
  77
  78 /* All binary buffers received from all slaves in current move are in
  79  * receive_queue[0..queue_length-1] */
  80 extern struct buf_state **receive_queue;
  81 extern int queue_length;
  82 /* Queue age is incremented each time the queue is emptied. */
  83 extern int queue_age;
  84
  85 /* Max size of all gtp commands for one game.
  86  * 60 chars for the first line of genmoves plus 100 lines
  87  * of 30 chars each for the stats at last move. */
  88 #define CMDS_SIZE (60*MAX_GAMELEN + 30*100)
  89
  90 /* Max size for one line of reply or slave log. */
  91 #define BSIZE 4096
  92
  93 #endif