feat: initial commit

LICENSE

@@ -0,0 +1,9 @@
+Copyright 2022 ptrcnull
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

@@ -0,0 +1,9 @@
+# workers
+
+simple parallelization utilities
+
+requires go 1.18+
+
+see [godoc][1] or just read the [source](workers.go)
+
+[1]: https://pkg.go.dev/git.ddd.rip/ptrcnull/workers

go.mod

@@ -0,0 +1,3 @@
+module git.ddd.rip/ptrcnull/workers
+
+go 1.18

workers.go

@@ -0,0 +1,18 @@
+package workers
+
+import "sync"
+
+// Channel launches n workers to perform an action for every item in the input channel
+func Channel[T any](n int, ch chan T, handler func(T)) {
+	var wg sync.WaitGroup
+	wg.Add(n)
+	for i := 0; i < n; i++ {
+		go func() {
+			for item := range ch {
+				handler(item)
+			}
+			wg.Done()
+		}()
+	}
+	wg.Wait()
+}