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context manager to lock record

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This commit is contained in:
Michael Davidsaver
2013-12-10 16:26:42 -05:00
parent 91152738ad
commit 6a9aa2e29d
1 changed files with 24 additions and 0 deletions
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24
devsupApp/src/dbrec.c
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@ -274,6 +274,26 @@ static PyObject *pyRecord_asyncFinish(pyRecord *self, PyObject *args, PyObject *
return PyLong_FromLong(ret);
}
static PyObject *pyRecord_enter(pyRecord *self)
{
dbScanLock(self->entry.precnode->precord);
Py_RETURN_NONE;
}
static PyObject *pyRecord_exit(pyRecord *self, PyObject *args)
{
PyObject *t, *v, *tb;
/* always unlock, regardless of arguments */
dbScanUnlock(self->entry.precnode->precord);
if(!PyArg_ParseTuple(args, "OOO", &t, &v, &tb))
return NULL;
Py_RETURN_FALSE;
}
static PyMethodDef pyRecord_methods[] = {
{"name", (PyCFunction)pyRecord_name, METH_NOARGS,
"Return record name string"},
@ -297,6 +317,10 @@ static PyMethodDef pyRecord_methods[] = {
"Begin an asynchronous action. Record must be locked!"},
{"asyncFinish", (PyCFunction)pyRecord_asyncFinish, METH_VARARGS|METH_KEYWORDS,
"Complete an asynchronous action. Record must *not* be locked!"},
{"__enter__", (PyCFunction)pyRecord_enter, METH_NOARGS,
"scan lock this record"},
{"__exit__", (PyCFunction)pyRecord_exit, METH_VARARGS,
"scan unlock this record"},
{NULL, NULL, 0, NULL}
};