void _log(fc_log_t *log, const char *file, int line, int level, const char *fmt, ...)
{
int len, size, errno_save;
char buf[FC_MAX_ERR_STR];
va_list args;
struct timeval tv;
struct tm *tm;
if (!log || log->fd < 0) {
return;
}
gettimeofday(&tv, NULL);
tm = localtime(&tv.tv_sec);
errno_save = errno;
len = 0;
size = FC_MAX_ERR_STR;
len += fc_scnprintf(buf + len, size - len, "[%02d-%02d %02d:%02d:%02d.%ld] "
"[%*s] [%-12s:%-4d] ",
tm->tm_mon, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec,
tv.tv_usec,
MAX_LEVEL_DESC_LEN,
loglevel_desc[level],
fc_basename(file), line);
va_start(args, fmt);
len += fc_vscnprintf(buf + len, size - len, fmt, args);
va_end(args);
// we do not need '\0'
buf[len++] = '\n';
if (write(log->fd, buf, len) < 0) {
log->nerr ++;
}
errno = errno_save;
}
static void
req_process_num(struct context *ctx, struct conn *conn, struct msg *msg)
{
rstatus_t status;
uint8_t *key, nkey, cid;
struct item *it;
struct itemx *itx;
uint64_t cnum, nnum;
char numstr[FC_UINT64_MAXLEN];
int n;
key = msg->key_start;
nkey = (uint8_t)(msg->key_end - msg->key_start);
/* 1). look up existing itemx */
itx = itemx_getx(msg->hash, msg->md);
if (itx == NULL) {
/* 2a). miss -> return NOT_FOUND */
rsp_send_status(ctx, conn, msg, MSG_RSP_NOT_FOUND);
return;
}
/* 2b). hit -> read existing item into it */
it = slab_read_item(itx->sid, itx->offset);
if (it == NULL) {
rsp_send_error(ctx, conn, msg, MSG_RSP_SERVER_ERROR, errno);
return;
}
if (item_expired(it)) {
rsp_send_status(ctx, conn, msg, MSG_RSP_NOT_FOUND);
return;
}
/* 3). sanity check item data to be a number */
status = fc_atou64(item_data(it), it->ndata, &cnum);
if (status != FC_OK) {
rsp_send_error(ctx, conn, msg, MSG_RSP_CLIENT_ERROR, EINVAL);
return;
}
/* 4). remove existing itemx of it */
itemx_removex(msg->hash, msg->md);
/* 5). compute the new incr/decr number nnum and numstr */
if (msg->type == MSG_REQ_INCR) {
nnum = cnum + msg->num;
} else {
if (cnum < msg->num) {
nnum = 0;
} else {
nnum = cnum - msg->num;
}
}
n = fc_scnprintf(numstr, sizeof(numstr), "%"PRIu64"", nnum);
/* 6). alloc new item that can hold n worth of bytes */
cid = item_slabcid(nkey, n);
ASSERT(cid != SLABCLASS_INVALID_ID);
it = item_get(key, nkey, cid, n, time_reltime(msg->expiry), msg->flags,
msg->md, msg->hash);
if (it == NULL) {
rsp_send_error(ctx, conn, msg, MSG_RSP_SERVER_ERROR, ENOMEM);
return;
}
/* 7). copy numstr to it */
fc_memcpy(item_data(it), numstr, n);
rsp_send_num(ctx, conn, msg, it);
}
