Update the examples to use a PyThreadRef parameter.

Author: ZeroIntensity

peps/pep-0788.rst

@@ -654,7 +654,8 @@ With this PEP, you'd implement it like this:
             return -1;
         }
 
-        if (PyThreadState_Ensure(ref) < 0) {
+        PyThreadRef thread;
+        if (PyThreadState_Ensure(ref, &thread) < 0) {
             PyInterpreterRef_Close(ref);
             puts("Out of memory.\n", stderr);
             return -1;
@@ -665,7 +666,7 @@ With this PEP, you'd implement it like this:
         free(to_write);
         PyErr_Print();
 
-        PyThreadState_Release();
+        PyThreadState_Release(thread);
         PyInterpreterRef_Close(ref);
         return res < 0;
     }
@@ -756,14 +757,15 @@ This is the same code, rewritten to use the new functions:
     thread_func(void *arg)
     {
         PyInterpreterRef interp = (PyInterpreterRef)arg;
-        if (PyThreadState_Ensure(interp) < 0) {
+        PyThreadRef thread;
+        if (PyThreadState_Ensure(interp, &thread) < 0) {
             PyInterpreterRef_Close(interp);
             return -1;
         }
         if (PyRun_SimpleString("print(42)") < 0) {
             PyErr_Print();
         }
-        PyThreadState_Release();
+        PyThreadState_Release(&thread);
         PyInterpreterRef_Close(interp);
         return 0;
     }
@@ -803,7 +805,8 @@ release the interpreter reference, allowing the interpreter to shut down.
     thread_func(void *arg)
     {
         PyInterpreterRef ref = (PyInterpreterRef)arg;
-        if (PyThreadState_Ensure(ref) < 0) {
+        PyThreadRef thread;
+        if (PyThreadState_Ensure(ref, &thread) < 0) {
             PyInterpreterRef_Close(ref);
             return -1;
         }
@@ -813,7 +816,7 @@ release the interpreter reference, allowing the interpreter to shut down.
         if (PyRun_SimpleString("print(42)") < 0) {
             PyErr_Print();
         }
-        PyThreadState_Release();
+        PyThreadState_Release(thread);
         return 0;
     }
 
@@ -859,14 +862,15 @@ deadlock the interpreter if it's not released.
             return -1;
         }
 
-        if (PyThreadState_Ensure(ref) < 0) {
+        PyThreadRef thread;
+        if (PyThreadState_Ensure(ref, &thread) < 0) {
             PyInterpreterRef_Close(ref);
             return -1;
         }
         if (PyRun_SimpleString("print(42)") < 0) {
             PyErr_Print();
         }
-        PyThreadState_Release();
+        PyThreadState_Release(thread);
         PyInterpreterRef_Close(ref);
         return 0;
     }
@@ -917,14 +921,15 @@ interpreter here.
             return;
         }
 
-        if (PyThreadState_Ensure(ref) < 0) {
+        PyThreadRef thread;
+        if (PyThreadState_Ensure(ref, &thread) < 0) {
             PyInterpreterRef_Close(ref);
             return -1;
         }
         if (PyRun_SimpleString("print(42)") < 0) {
             PyErr_Print();
         }
-        PyThreadState_Release();
+        PyThreadState_Release(thread);
         PyInterpreterRef_Close(ref);
         return 0;
     }