[Python-checkins] r84774 - in python/branches/py3k: Include/ceval.h Misc/NEWS Python/ceval.c Python/ceval_gil.h Python/pythonrun.c
antoine.pitrou
python-checkins at python.org
Mon Sep 13 16:16:52 CEST 2010
Author: antoine.pitrou
Date: Mon Sep 13 16:16:46 2010
New Revision: 84774
Log:
Issue #9828: Destroy the GIL in Py_Finalize(), so that it gets properly
re-created on a subsequent call to Py_Initialize(). The problem (a crash)
wouldn't appear in 3.1 or 2.7 where the GIL's structure is more trivial.
Modified:
python/branches/py3k/Include/ceval.h
python/branches/py3k/Misc/NEWS
python/branches/py3k/Python/ceval.c
python/branches/py3k/Python/ceval_gil.h
python/branches/py3k/Python/pythonrun.c
Modified: python/branches/py3k/Include/ceval.h
==============================================================================
--- python/branches/py3k/Include/ceval.h (original)
+++ python/branches/py3k/Include/ceval.h Mon Sep 13 16:16:46 2010
@@ -160,6 +160,7 @@
PyAPI_FUNC(int) PyEval_ThreadsInitialized(void);
PyAPI_FUNC(void) PyEval_InitThreads(void);
+PyAPI_FUNC(void) _PyEval_FiniThreads(void);
PyAPI_FUNC(void) PyEval_AcquireLock(void);
PyAPI_FUNC(void) PyEval_ReleaseLock(void);
PyAPI_FUNC(void) PyEval_AcquireThread(PyThreadState *tstate);
Modified: python/branches/py3k/Misc/NEWS
==============================================================================
--- python/branches/py3k/Misc/NEWS (original)
+++ python/branches/py3k/Misc/NEWS Mon Sep 13 16:16:46 2010
@@ -10,6 +10,10 @@
Core and Builtins
-----------------
+- Issue #9828: Destroy the GIL in Py_Finalize(), so that it gets properly
+ re-created on a subsequent call to Py_Initialize(). The problem (a crash)
+ wouldn't appear in 3.1 or 2.7 where the GIL's structure is more trivial.
+
- Issue #9210: Configure option --with-wctype-functions was removed. Using the
functions from the libc caused the methods .upper() and lower() to become
locale aware and created subtly wrong results.
Modified: python/branches/py3k/Python/ceval.c
==============================================================================
--- python/branches/py3k/Python/ceval.c (original)
+++ python/branches/py3k/Python/ceval.c Mon Sep 13 16:16:46 2010
@@ -313,6 +313,15 @@
}
void
+_PyEval_FiniThreads(void)
+{
+ if (!gil_created())
+ return;
+ destroy_gil();
+ assert(!gil_created());
+}
+
+void
PyEval_AcquireLock(void)
{
PyThreadState *tstate = PyThreadState_GET();
@@ -368,10 +377,6 @@
if (!gil_created())
return;
- /*XXX Can't use PyThread_free_lock here because it does too
- much error-checking. Doing this cleanly would require
- adding a new function to each thread_*.h. Instead, just
- create a new lock and waste a little bit of memory */
recreate_gil();
pending_lock = PyThread_allocate_lock();
take_gil(tstate);
Modified: python/branches/py3k/Python/ceval_gil.h
==============================================================================
--- python/branches/py3k/Python/ceval_gil.h (original)
+++ python/branches/py3k/Python/ceval_gil.h Mon Sep 13 16:16:46 2010
@@ -95,6 +95,9 @@
#define MUTEX_INIT(mut) \
if (pthread_mutex_init(&mut, NULL)) { \
Py_FatalError("pthread_mutex_init(" #mut ") failed"); };
+#define MUTEX_FINI(mut) \
+ if (pthread_mutex_destroy(&mut)) { \
+ Py_FatalError("pthread_mutex_destroy(" #mut ") failed"); };
#define MUTEX_LOCK(mut) \
if (pthread_mutex_lock(&mut)) { \
Py_FatalError("pthread_mutex_lock(" #mut ") failed"); };
@@ -106,6 +109,9 @@
#define COND_INIT(cond) \
if (pthread_cond_init(&cond, NULL)) { \
Py_FatalError("pthread_cond_init(" #cond ") failed"); };
+#define COND_FINI(cond) \
+ if (pthread_cond_destroy(&cond)) { \
+ Py_FatalError("pthread_cond_destroy(" #cond ") failed"); };
#define COND_SIGNAL(cond) \
if (pthread_cond_signal(&cond)) { \
Py_FatalError("pthread_cond_signal(" #cond ") failed"); };
@@ -305,9 +311,24 @@
_Py_atomic_store_explicit(&gil_locked, 0, _Py_memory_order_release);
}
+static void destroy_gil(void)
+{
+ MUTEX_FINI(gil_mutex);
+#ifdef FORCE_SWITCHING
+ MUTEX_FINI(switch_mutex);
+#endif
+ COND_FINI(gil_cond);
+#ifdef FORCE_SWITCHING
+ COND_FINI(switch_cond);
+#endif
+ _Py_atomic_store_explicit(&gil_locked, -1, _Py_memory_order_release);
+ _Py_ANNOTATE_RWLOCK_DESTROY(&gil_locked);
+}
+
static void recreate_gil(void)
{
_Py_ANNOTATE_RWLOCK_DESTROY(&gil_locked);
+ /* XXX should we destroy the old OS resources here? */
create_gil();
}
Modified: python/branches/py3k/Python/pythonrun.c
==============================================================================
--- python/branches/py3k/Python/pythonrun.c (original)
+++ python/branches/py3k/Python/pythonrun.c Mon Sep 13 16:16:46 2010
@@ -514,6 +514,10 @@
PyGrammar_RemoveAccelerators(&_PyParser_Grammar);
+#ifdef WITH_THREAD
+ _PyEval_FiniThreads();
+#endif
+
#ifdef Py_TRACE_REFS
/* Display addresses (& refcnts) of all objects still alive.
* An address can be used to find the repr of the object, printed
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