[Python-checkins] closes bpo-36139: release GIL around munmap(). (GH-12073)
Benjamin Peterson
webhook-mailer at python.org
Wed Mar 6 10:52:45 EST 2019
https://github.com/python/cpython/commit/bb9593af0ac835b93c2834d44b72fa34e30efed0
commit: bb9593af0ac835b93c2834d44b72fa34e30efed0
branch: master
author: Davide Rizzo <sorcio at gmail.com>
committer: Benjamin Peterson <benjamin at python.org>
date: 2019-03-06T07:52:34-08:00
summary:
closes bpo-36139: release GIL around munmap(). (GH-12073)
files:
A Misc/NEWS.d/next/Library/2019-03-06-13-07-29.bpo-36139.6kedum.rst
M Modules/mmapmodule.c
diff --git a/Misc/NEWS.d/next/Library/2019-03-06-13-07-29.bpo-36139.6kedum.rst b/Misc/NEWS.d/next/Library/2019-03-06-13-07-29.bpo-36139.6kedum.rst
new file mode 100644
index 000000000000..9dcd857cd256
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2019-03-06-13-07-29.bpo-36139.6kedum.rst
@@ -0,0 +1 @@
+Release GIL when closing :class:`~mmap.mmap` objects.
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index f4caf8799f10..326288cccde5 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -117,6 +117,7 @@ typedef struct {
static void
mmap_object_dealloc(mmap_object *m_obj)
{
+ Py_BEGIN_ALLOW_THREADS
#ifdef MS_WINDOWS
if (m_obj->data != NULL)
UnmapViewOfFile (m_obj->data);
@@ -135,6 +136,7 @@ mmap_object_dealloc(mmap_object *m_obj)
munmap(m_obj->data, m_obj->size);
}
#endif /* UNIX */
+ Py_END_ALLOW_THREADS
if (m_obj->weakreflist != NULL)
PyObject_ClearWeakRefs((PyObject *) m_obj);
@@ -157,28 +159,37 @@ mmap_close_method(mmap_object *self, PyObject *unused)
again.
TODO - should we check for errors in the close operations???
*/
- if (self->data != NULL) {
- UnmapViewOfFile(self->data);
- self->data = NULL;
+ HANDLE map_handle = self->map_handle;
+ HANDLE file_handle = self->file_handle;
+ char *data = self->data;
+ self->map_handle = NULL;
+ self->file_handle = INVALID_HANDLE_VALUE;
+ self->data = NULL;
+ Py_BEGIN_ALLOW_THREADS
+ if (data != NULL) {
+ UnmapViewOfFile(data);
}
- if (self->map_handle != NULL) {
- CloseHandle(self->map_handle);
- self->map_handle = NULL;
+ if (map_handle != NULL) {
+ CloseHandle(map_handle);
}
- if (self->file_handle != INVALID_HANDLE_VALUE) {
- CloseHandle(self->file_handle);
- self->file_handle = INVALID_HANDLE_VALUE;
+ if (file_handle != INVALID_HANDLE_VALUE) {
+ CloseHandle(file_handle);
}
+ Py_END_ALLOW_THREADS
#endif /* MS_WINDOWS */
#ifdef UNIX
- if (0 <= self->fd)
- (void) close(self->fd);
+ int fd = self->fd;
+ char *data = self->data;
self->fd = -1;
- if (self->data != NULL) {
- munmap(self->data, self->size);
- self->data = NULL;
+ self->data = NULL;
+ Py_BEGIN_ALLOW_THREADS
+ if (0 <= fd)
+ (void) close(fd);
+ if (data != NULL) {
+ munmap(data, self->size);
}
+ Py_END_ALLOW_THREADS
#endif
Py_RETURN_NONE;
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