From: Tim Peters <tim.peters@gmail.com>
Date: Sat, 9 Oct 2004 22:47:13 +0000 (+0000)
Subject: _PyGILState_Init(), PyGILState_Ensure():  Since PyThread_set_key_value()
X-Git-Tag: v2.4b1~62
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f9becec8cd989743aeb22d02a0ededddeecc89a6;p=python

_PyGILState_Init(), PyGILState_Ensure():  Since PyThread_set_key_value()
can fail, check its return value, and die if it does fail.

_PyGILState_Init():  Assert that the thread doesn't already have an
association for autoTLSkey.  If it does, PyThread_set_key_value() will
ignore the attempt to (re)set the association, which the code clearly
doesn't want.
---

diff --git a/Python/pystate.c b/Python/pystate.c
index d88d2d116e..ba9be971b8 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -395,7 +395,9 @@ _PyGILState_Init(PyInterpreterState *i, PyThreadState *t)
 	autoTLSkey = PyThread_create_key();
 	autoInterpreterState = i;
 	/* Now stash the thread state for this thread in TLS */
-	PyThread_set_key_value(autoTLSkey, (void *)t);
+	assert(PyThread_get_key_value(autoTLSkey) == NULL);
+	if (PyThread_set_key_value(autoTLSkey, (void *)t) < 0)
+		Py_FatalError("Couldn't create autoTLSkey mapping");
 	assert(t->gilstate_counter == 0); /* must be a new thread state */
 	t->gilstate_counter = 1;
 }
@@ -434,7 +436,8 @@ PyGILState_Ensure(void)
 		tcur = PyThreadState_New(autoInterpreterState);
 		if (tcur == NULL)
 			Py_FatalError("Couldn't create thread-state for new thread");
-		PyThread_set_key_value(autoTLSkey, (void *)tcur);
+		if (PyThread_set_key_value(autoTLSkey, (void *)tcur) < 0)
+			Py_FatalError("Couldn't create autoTLSkey mapping");
 		current = 0; /* new thread state is never current */
 	}
 	else