Issue #437

Support ffi.dlopen(<void* cdata>).  See updated documentation.

2 files changed, 47 insertions, 0 deletions

diff --git a/testing/cffi0/test_ownlib.py b/testing/cffi0/test_ownlib.py
index 9295163..990f259 100644
--- a/testing/cffi0/test_ownlib.py
+++ b/testing/cffi0/test_ownlib.py
@@ -371,3 +371,29 @@ class TestOwnLib(object):
         assert s.top == 22
         assert s.right == 33
         assert s.bottom == 44
+
+    def test_dlopen_handle(self):
+        if self.module is None:
+            py.test.skip("fix the auto-generation of the tiny test lib")
+        if sys.platform == 'win32':
+            py.test.skip("uses 'dl' explicitly")
+        if self.__class__.Backend is CTypesBackend:
+            py.test.skip("not for the ctypes backend")
+        backend = self.Backend()
+        ffi1 = FFI(backend=backend)
+        ffi1.cdef("""void *dlopen(const char *filename, int flags);
+                     int dlclose(void *handle);""")
+        lib1 = ffi1.dlopen('dl')
+        handle = lib1.dlopen(self.module.encode(sys.getfilesystemencoding()),
+                             backend.RTLD_LAZY)
+        assert ffi1.typeof(handle) == ffi1.typeof("void *")
+        assert handle
+
+        ffi = FFI(backend=backend)
+        ffi.cdef("""unsigned short foo_2bytes(unsigned short a);""")
+        lib = ffi.dlopen(handle)
+        x = lib.foo_2bytes(1000)
+        assert x == 1042
+
+        err = lib1.dlclose(handle)
+        assert err == 0
diff --git a/testing/cffi1/test_re_python.py b/testing/cffi1/test_re_python.py
index 8b998d7..dce4f40 100644
--- a/testing/cffi1/test_re_python.py
+++ b/testing/cffi1/test_re_python.py
@@ -260,3 +260,24 @@ def test_selfref():
     # based on issue #429
     from re_python_pysrc import ffi
     ffi.new("selfref_ptr_t")
+
+def test_dlopen_handle():
+    import _cffi_backend
+    from re_python_pysrc import ffi
+    if sys.platform == 'win32':
+        py.test.skip("uses 'dl' explicitly")
+    ffi1 = FFI()
+    ffi1.cdef("""void *dlopen(const char *filename, int flags);
+                 int dlclose(void *handle);""")
+    lib1 = ffi1.dlopen('dl')
+    handle = lib1.dlopen(extmod.encode(sys.getfilesystemencoding()),
+                         _cffi_backend.RTLD_LAZY)
+    assert ffi1.typeof(handle) == ffi1.typeof("void *")
+    assert handle
+
+    lib = ffi.dlopen(handle)
+    assert lib.add42(-10) == 32
+    assert type(lib.add42) is _cffi_backend.FFI.CData
+
+    err = lib1.dlclose(handle)
+    assert err == 0