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chaindb: fix async.

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This commit is contained in:
Christopher Jeffrey 2016-01-21 03:48:39 -08:00
parent b273bec120
commit b65ed25b29
1 changed files with 10 additions and 7 deletions
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17
lib/bcoin/chain.js
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@ -714,7 +714,6 @@ function ChainDB(chain, options) {
this.tip = -1;
this.size = 0;
this.fd = null;
this._writing = 0;
// Need to cache up to the retarget interval
// if we're going to be checking the damn
@ -863,7 +862,6 @@ ChainDB.prototype.saveAsync = function save(entry, callback) {
// Speed up writes by doing them asynchronously
// and keeping the data to be written in memory.
this._queue[entry.height] = entry;
this._writing++;
// Write asynchronously to the db.
raw = entry.toRaw();
@ -877,14 +875,13 @@ ChainDB.prototype.saveAsync = function save(entry, callback) {
// Something tried to write here but couldn't.
// Synchronously write it and get it over with.
try {
if (item !== entry)
if (item && item !== entry)
success = self._write(item.toRaw(), offset);
} catch (e) {
err = e;
}
delete self._queue[entry.height];
self._writing--;
if (err) {
if (callback)
@ -901,7 +898,13 @@ ChainDB.prototype.saveAsync = function save(entry, callback) {
ChainDB.prototype.remove = function remove(height) {
assert(height >= 0);
if (this._queue[height]) {
utils.debug('Warning: write job in progress.');
delete this._queue[height];
}
this._write(this._nullBlock, height * BLOCK_SIZE);
delete this._cache[height];
// If we deleted several blocks at the end, go back
// to the last non-null block and truncate the file
@ -959,6 +962,8 @@ ChainDB.prototype._writeAsync = function _writeAsync(data, offset, callback) {
if (offset < 0 || offset == null)
return false;
self.size += added;
(function callee() {
fs.write(self.fd, data, index, size, offset, function(err, bytes) {
if (err)
@ -968,10 +973,8 @@ ChainDB.prototype._writeAsync = function _writeAsync(data, offset, callback) {
size -= bytes;
offset += bytes;
if (index === data.length) {
self.size += added;
if (index === data.length)
return callback(null, true);
}
callee();
});