1 files changed, 33 insertions, 0 deletions
diff --git a/tests/modules/scheduler/semaphore.lua b/tests/modules/scheduler/semaphore.lua
new file mode 100644
index 000000000..45cc43e1e
--- /dev/null
+++ b/tests/modules/scheduler/semaphore.lua
@@ -0,0 +1,33 @@
+import("core.base.scheduler")
+
+function _loop(semaphore, id)
+    print("[%d]: start", id)
+    while true do
+        print("[%d]: wait ..", id)
+        local value = semaphore:wait(-1)
+        print("[%d]:   -> triggered, value: %d ..", id, value)
+    end
+end
+
+function _input(semaphore)
+    while true do
+        if io.readable() then
+            local ch = io.read()
+            print("  -> post semaphore")
+            if ch then
+                semaphore:post(2)
+            end
+        else
+            os.sleep(1000)
+        end
+    end
+end
+
+function main()
+    local semaphore = scheduler.co_semaphore("", 1)
+    for i = 1, 10 do
+        scheduler.co_start(_loop, semaphore, i)
+    end
+    scheduler.co_start(_input, semaphore)
+end
+