[pypy-svn] pypy jitypes2: add a test that fails if we do not emit CALL_RELEASE_GIL for _ffi calls

[antocuni]

Author: Antonio Cuni <anto.cuni at gmail.com>
Branch: jitypes2
Changeset: r43329:489e9af0684e
Date: 2011-04-13 17:09 +0200
http://bitbucket.org/pypy/pypy/changeset/489e9af0684e/

Log:	add a test that fails if we do not emit CALL_RELEASE_GIL for _ffi
	calls

diff --git a/pypy/module/pypyjit/test_pypy_c/test_pypy_c_new.py b/pypy/module/pypyjit/test_pypy_c/test_pypy_c_new.py
--- a/pypy/module/pypyjit/test_pypy_c/test_pypy_c_new.py
+++ b/pypy/module/pypyjit/test_pypy_c/test_pypy_c_new.py
@@ -1037,3 +1037,34 @@
             --TICK--
             jump(p0, p1, p2, p3, p4, i22, i6, i7, p8, p9, descr=<Loop0>)
         """)
+
+    def test__ffi_call_releases_gil(self):
+        from pypy.rlib.test.test_libffi import get_libc_name
+        def main(libc_name, n):
+            import time
+            from threading import Thread
+            from _ffi import CDLL, types
+
+            libc = CDLL(libc_name)
+            sleep = libc.getfunc('sleep', [types.uint], types.uint)
+            delays = [0]*n + [1]
+
+            def loop_of_sleeps(i, delays):
+                import time
+                for delay in delays:
+                    sleep(delay)    # ID: sleep
+
+            threads = [Thread(target=loop_of_sleeps, args=[i, delays]) for i in range(5)]
+            start = time.time()
+            for i, thread in enumerate(threads):
+                thread.start()
+            for thread in threads:
+                thread.join()
+            end = time.time()
+            #
+            return end - start
+        #
+        log = self.run(main, [get_libc_name(), 200], threshold=150)
+        assert 1 <= log.result <= 1.5 # at most 0.5 seconds of overhead
+        loops = log.loops_by_id('sleep')
+        assert len(loops) == 1 # make sure that we actually JITted the loop