C初心者がmemcached-1.4.5を追いかける。(2)

C初心者がmemcached-1.4.5を追いかける。(1)の続き
ソースはコチラにてDLしました。

memcached.c(4277行目あたり)

    /* init settings */
    settings_init();

memcached.c(176行目あたり)

static void settings_init(void) {
    settings.use_cas = true;
    settings.access = 0700;
    settings.port = 11211;
    settings.udpport = 11211;
    /* By default this string should be NULL for getaddrinfo() */
    settings.inter = NULL;
    settings.maxbytes = 64 * 1024 * 1024; /* default is 64MB */
    settings.maxconns = 1024;         /* to limit connections-related memory to about 5MB */
    settings.verbose = 0;
    settings.oldest_live = 0;
    settings.evict_to_free = 1;       /* push old items out of cache when memory runs out */
    settings.socketpath = NULL;       /* by default, not using a unix socket */
    settings.factor = 1.25;
    settings.chunk_size = 48;         /* space for a modest key and value */
    settings.num_threads = 4;         /* N workers */
    settings.prefix_delimiter = ':';
    settings.detail_enabled = 0;
    settings.reqs_per_event = 20;
    settings.backlog = 1024;
    settings.binding_protocol = negotiating_prot;
    settings.item_size_max = 1024 * 1024; /* The famous 1MB upper limit. */
}


memcached.c(107行目あたり)

/** exported globals **/
struct stats stats;
struct settings settings;
time_t process_started;     /* when the process was started */

memcached.h(255行目あたり)

/* When adding a setting, be sure to update process_stat_settings */
/**
 * Globally accessible settings as derived from the commandline.
 */
struct settings {
    size_t maxbytes;
    int maxconns;
    int port;
    int udpport;
    char *inter;
    int verbose;
    rel_time_t oldest_live; /* ignore existing items older than this */
    int evict_to_free;
    char *socketpath;   /* path to unix socket if using local socket */
    int access;  /* access mask (a la chmod) for unix domain socket */
    double factor;          /* chunk size growth factor */
    int chunk_size;
    int num_threads;        /* number of worker (without dispatcher) libevent threads to run */
    char prefix_delimiter;  /* character that marks a key prefix (for stats) */
    int detail_enabled;     /* nonzero if we're collecting detailed stats */
    int reqs_per_event;     /* Maximum number of io to process on each
                               io-event. */
    bool use_cas;
    enum protocol binding_protocol;
    int backlog;
    int item_size_max;        /* Maximum item size, and upper end for slabs */
    bool sasl;              /* SASL on/off */
};

extern struct stats stats;
extern time_t process_started;
extern struct settings settings;

struct は構造体。

extern は複数ソースコードをまたいで変数やメソッドを使用するときに時に使う宣言。

settings_initでは、settings.sasl以外のメンバを初期化している。

続きは↓で
C初心者がmemcached-1.4.5を追いかける。(3){setbuf関数を使用}