beremiz

Added runtime/spawn_subprocess.py. Force use posix spawn instead of fork, with API similar to subprocess. Using fork in runtime is incompatible with Xenomai, because memory is locked and this can lead to out of memory error.
from __future__ import absolute_import
import sys
import gluon.contrib.simplejson as simplejson
class JSONRPCServiceBase(object):
def __init__(self):
self.methods = {}
def response(self, id, result):
return simplejson.dumps({'version': '1.1', 'id': id,
'result': result, 'error': None})
def error(self, id, code, message):
return simplejson.dumps({
'id': id,
'version': '1.1',
'error': {'name': 'JSONRPCError',
'code': code,
'message': message}
})
def add_method(self, name, method):
self.methods[name] = method
def process(self, data):
data = simplejson.loads(data)
id, method, params = data["id"], data["method"], data["params"]
if method in self.methods:
try:
result = self.methods[method](*params)
return self.response(id, result)
except Exception:
etype, eval, _etb = sys.exc_info()
return self.error(id, 100, 'Exception %s: %s' % (etype, eval))
except BaseException:
etype, eval, _etb = sys.exc_info()
return self.error(id, 100, '%s: %s' % (etype.__name__, eval))
else:
return self.error(id, 100, 'method "%s" does not exist' % method)
def listmethods(self):
return self.methods.keys()