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authorDimitri Staessens <dimitri@ouroboros.rocks>2019-10-06 21:37:45 +0200
committerDimitri Staessens <dimitri@ouroboros.rocks>2019-10-06 21:37:45 +0200
commit3c51c3be85bb0d1bdb87ea0d6632f1c256912f27 (patch)
treec7ccc8279b12c4f7bdbbb4270d617e48f51722e4 /node_modules/inflight/inflight.js
parent412c104bebc507bea9c94fd53b5bdc4b64cbfe31 (diff)
downloadwebsite-3c51c3be85bb0d1bdb87ea0d6632f1c256912f27.tar.gz
website-3c51c3be85bb0d1bdb87ea0d6632f1c256912f27.zip
build: Add some required modules for node
Diffstat (limited to 'node_modules/inflight/inflight.js')
-rw-r--r--node_modules/inflight/inflight.js54
1 files changed, 54 insertions, 0 deletions
diff --git a/node_modules/inflight/inflight.js b/node_modules/inflight/inflight.js
new file mode 100644
index 0000000..48202b3
--- /dev/null
+++ b/node_modules/inflight/inflight.js
@@ -0,0 +1,54 @@
+var wrappy = require('wrappy')
+var reqs = Object.create(null)
+var once = require('once')
+
+module.exports = wrappy(inflight)
+
+function inflight (key, cb) {
+ if (reqs[key]) {
+ reqs[key].push(cb)
+ return null
+ } else {
+ reqs[key] = [cb]
+ return makeres(key)
+ }
+}
+
+function makeres (key) {
+ return once(function RES () {
+ var cbs = reqs[key]
+ var len = cbs.length
+ var args = slice(arguments)
+
+ // XXX It's somewhat ambiguous whether a new callback added in this
+ // pass should be queued for later execution if something in the
+ // list of callbacks throws, or if it should just be discarded.
+ // However, it's such an edge case that it hardly matters, and either
+ // choice is likely as surprising as the other.
+ // As it happens, we do go ahead and schedule it for later execution.
+ try {
+ for (var i = 0; i < len; i++) {
+ cbs[i].apply(null, args)
+ }
+ } finally {
+ if (cbs.length > len) {
+ // added more in the interim.
+ // de-zalgo, just in case, but don't call again.
+ cbs.splice(0, len)
+ process.nextTick(function () {
+ RES.apply(null, args)
+ })
+ } else {
+ delete reqs[key]
+ }
+ }
+ })
+}
+
+function slice (args) {
+ var length = args.length
+ var array = []
+
+ for (var i = 0; i < length; i++) array[i] = args[i]
+ return array
+}