package/python-sysv-ipc: new package

python-sysv-ipc provides Python bindings for System V IPC primitives
(semaphores, shared memory and message queues).

https://github.com/osvenskan/sysv_ipc

Signed-off-by: Vincent Jardin <vjardin@free.fr>
Signed-off-by: Vincent Cruz <mooz@blockos.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/testing/tests/package/sample_python_sysv_ipc.py

@@ -0,0 +1,26 @@
+import subprocess
+import sys
+import sysv_ipc
+
+key = [303, 808]
+iterations = 6
+
+queue = [
+    sysv_ipc.MessageQueue(key[0], sysv_ipc.IPC_CREX),
+    sysv_ipc.MessageQueue(key[1], sysv_ipc.IPC_CREX)
+]
+
+procs = [None] * 2
+
+procs[0] = subprocess.Popen([sys.executable, "/root/ping.py", str(key[0]), str(key[1]), str(iterations)])
+procs[1] = subprocess.Popen([sys.executable, "/root/pong.py", str(key[1]), str(key[0]), str(iterations)])
+
+for p in procs:
+    try:
+        errs = p.wait(timeout=15)
+    except subprocess.TimeoutExpired:
+        p.kill()
+        errs = p.wait()
+
+for q in queue:
+    q.remove()

support/testing/tests/package/test_python_sysv_ipc.py

@@ -0,0 +1,37 @@
+import os
+from tests.package.test_python import TestPythonPackageBase
+
+
+class TestPythonSysVIPC(TestPythonPackageBase):
+    __test__ = True
+    config = TestPythonPackageBase.config + \
+        """
+        BR2_PACKAGE_PYTHON3=y
+        BR2_PACKAGE_PYTHON_SYSV_IPC=y
+        """
+    sample_scripts = ["tests/package/sample_python_sysv_ipc.py",
+                      "tests/package/test_python_sysv_ipc/ping.py",
+                      "tests/package/test_python_sysv_ipc/pong.py"]
+
+    def test_run(self):
+        self.login()
+        self.check_sample_scripts_exist()
+
+        cmd = self.interpreter + " " + os.path.basename(self.sample_scripts[0])
+        output, ret = self.emulator.run(cmd, timeout=self.timeout)
+
+        self.assertEqual(ret, 0)
+        self.assertEqual(output, [
+            'ping 0',
+            'pong 0',
+            'ping 1',
+            'pong 1',
+            'ping 2',
+            'pong 2',
+            'ping 3',
+            'pong 3',
+            'ping 4',
+            'pong 4',
+            'ping 5',
+            'pong 5',
+        ])

support/testing/tests/package/test_python_sysv_ipc/ping.py

@@ -0,0 +1,17 @@
+import argparse
+import sysv_ipc
+
+parser = argparse.ArgumentParser()
+parser.add_argument("input", help="input message queue key", type=int)
+parser.add_argument("output", help="output message queue key", type=int)
+parser.add_argument("count", help="iterations count", type=int)
+args = parser.parse_args()
+
+incoming = sysv_ipc.MessageQueue(args.input)
+outgoing = sysv_ipc.MessageQueue(args.output)
+
+for i in range(0, args.count):
+    outgoing.send(f"ping {i}")
+
+    s, _ = incoming.receive()
+    print(s.decode())

support/testing/tests/package/test_python_sysv_ipc/pong.py

@@ -0,0 +1,17 @@
+import argparse
+import sysv_ipc
+
+parser = argparse.ArgumentParser()
+parser.add_argument("input", help="input message queue key", type=int)
+parser.add_argument("output", help="output message queue key", type=int)
+parser.add_argument("count", help="iterations count", type=int)
+args = parser.parse_args()
+
+incoming = sysv_ipc.MessageQueue(args.input)
+outgoing = sysv_ipc.MessageQueue(args.output)
+
+for i in range(0, args.count):
+    s, _ = incoming.receive()
+    print(s.decode())
+
+    outgoing.send(f"pong {i}")