def callAtom(self, atom, arguments, namedArgsMap):
"""
This method is used to reuse atoms without having to rebuild them.
"""
# Promote the atom, on the basis that atoms are generally reused.
atom = promote(atom)
# Log the atom to the JIT log. Don't do this if the atom's not
# promoted; it'll be slow.
jit_debug(atom.repr)
try:
return self.recvNamed(atom, arguments, namedArgsMap)
except Refused as r:
addTrail(r, self, atom, arguments)
raise
except UserException as ue:
addTrail(ue, self, atom, arguments)
raise
except MemoryError:
ue = userError(u"Memory corruption or exhausted heap")
addTrail(ue, self, atom, arguments)
raise ue
except StackOverflow:
check_stack_overflow()
ue = userError(u"Stack overflow")
addTrail(ue, self, atom, arguments)
raise ue
def recv(self, atom, args):
if atom is RUN_1:
return IntObject(int(unwrapStr(args[0]).encode('utf-8')))
if atom is RUN_2:
inp = unwrapStr(args[0])
radix = unwrapInt(args[1])
try:
v = int(inp.encode("utf-8"), radix)
except ValueError:
raise userError(u"Invalid literal for base %d: %s" % (
radix, inp))
return IntObject(v)
if atom is FROMBYTES_1:
return IntObject(int(unwrapBytes(args[0])))
if atom is FROMBYTES_2:
bs = unwrapBytes(args[0])
radix = unwrapInt(args[1])
try:
v = int(bs, radix)
except ValueError:
raise userError(u"Invalid literal for base %d: %s" % (
radix, bytesToString(bs)))
return IntObject(v)
raise Refused(self, atom, args)
def setTarget(self, newTarget):
if self.isSwitchable:
self._target = newTarget.resolutionRef()
if self is self._target:
raise userError(u"Ref loop")
else:
raise userError(u"No longer switchable")
def recv(self, atom, args):
if atom is RUN_1:
pname = unwrapStr(args[0])
for extension in [".ty", ".mast"]:
path = pname.encode("utf-8") + extension
for base in self.paths:
try:
with open(os.path.join(base, path), "rb") as handle:
source = handle.read()
with self.recorder.context("Deserialization"):
return loadMASTBytes(source)
except IOError:
continue
raise userError(u"Could not locate " + pname)
if atom is RUN_2:
scope = unwrapMap(args[1])
d = {}
for k, v in scope.items():
s = unwrapStr(k)
if not s.startswith("&&"):
raise userError(u"evalMonteFile scope map must be of the "
"form '[\"&&name\" => binding]'")
d[s[2:]] = scope[k]
code = obtainModule(self.paths, unwrapStr(args[0]).encode("utf-8"),
self.recorder)
return evaluateRaise([code], d)[0]
raise Refused(self, atom, args)
def auditDeepFrozen(audition):
from typhon.nodes import FinalPattern, Obj
from typhon.objects.user import Audition
from typhon.objects.printers import toString
if not isinstance(audition, Audition):
raise userError(u"not invoked with an Audition")
ast = audition.ast
if not isinstance(ast, Obj):
raise userError(u"audition not created with an object expr")
n = ast._n
if isinstance(n, FinalPattern):
objName = ast._n._n
else:
objName = None
ss = ast._script.getStaticScope()
namesUsed = ss.read + ss.set
errors = []
for name in namesUsed:
if name == objName:
continue
guard = audition.getGuard(name)
if not deepFrozenSupersetOf(guard):
errors.append(u'"%s" in the lexical scope of %s does not have a '
u'guard implying DeepFrozen, but %s' %
(name, audition.fqn, toString(guard)))
if len(errors) > 0:
raise userError(u'\n'.join(errors))
def _slice(self, start, stop):
if start < 0:
raise userError(u"slice/1: Negative start")
if stop < 0:
raise userError(u"slice/2: Negative stop")
stop = min(stop, len(self.objs))
start = min(start, stop)
return self.objs[start:stop]
def get(self, index):
# Lookup by index.
if index < 0:
raise userError(u"get/1: Index %d cannot be negative" % index)
try:
return self.objs[index]
except IndexError:
raise userError(u"get/1: Index %d is out of bounds" % index)
def takeTurn(self):
from typhon.objects.exceptions import sealException
from typhon.objects.refs import Promise, resolution
with self._pendingLock:
resolver, target, atom, args, namedArgs = self._pending.pop(0)
# Set up our Miranda FAIL.
if namedArgs.extractStringKey(u"FAIL", None) is None:
if resolver is not None:
FAIL = resolver.makeSmasher()
else:
from typhon.objects.ejectors import theThrower
FAIL = theThrower
namedArgs = namedArgs.withStringKey(u"FAIL", FAIL)
# If the target is a promise, then we should send to it instead of
# calling. Try to resolve it as much as possible first, though.
target = resolution(target)
# self.log(u"Taking turn: %s<-%s(%s) (resolver: %s)" %
# (target.toQuote(), atom.verb,
# u", ".join([arg.toQuote() for arg in args]),
# u"yes" if resolver is not None else u"no"))
try:
if isinstance(target, Promise):
if resolver is None:
target.sendOnly(atom, args, namedArgs)
else:
result = target.send(atom, args, namedArgs)
# The resolver may have already been invoked, so we'll use
# .resolveRace/1 instead of .resolve/1. ~ C.
resolver.resolveRace(result)
else:
result = target.callAtom(atom, args, namedArgs)
if resolver is not None:
# Same logic as above.
resolver.resolveRace(result)
except UserException as ue:
if resolver is not None:
resolver.smash(sealException(ue))
else:
self.log(u"Uncaught user exception while taking turn"
u" (and no resolver): %s" %
ue.formatError().decode("utf-8"),
tags=["serious"])
except VatCheckpointed:
self.log(u"Ran out of checkpoints while taking turn",
tags=["serious"])
if resolver is not None:
resolver.smash(sealException(userError(u"Vat ran out of checkpoints")))
except Ejecting:
self.log(u"Ejector tried to escape vat turn boundary",
tags=["serious"])
if resolver is not None:
resolver.smash(sealException(userError(u"Ejector tried to escape from vat")))
def _slice(self, start, stop):
if start < 0:
raise userError(u"slice/2: Negative start")
if stop < 0:
raise userError(u"slice/2: Negative stop")
keys = self.objectSet.keys()[start:stop]
rv = monteSet()
for k in keys:
rv[k] = None
return rv
def _slice(self, start, stop):
if start < 0:
raise userError(u"slice/2: Negative start")
if stop < 0:
raise userError(u"slice/2: Negative stop")
keys = self.objectSet.keys()[start:stop]
rv = monteSet()
for k in keys:
rv[k] = None
return rv
def _slice(self, start, stop):
if start < 0:
raise userError(u"slice/1: Negative start")
if stop < 0:
raise userError(u"slice/1: Negative stop")
items = self.objectMap.items()[start:stop]
rv = monteMap()
for k, v in items:
rv[k] = v
return rv
def recv(self, atom, args):
from typhon.nodes import Noun, Method, Obj
from typhon.objects.equality import optSame, EQUAL
from typhon.objects.user import Audition
if atom is _UNCALL_0:
from typhon.objects.collections.maps import EMPTY_MAP
return ConstList([subrangeGuardMaker, StrObject(u"get"), ConstList([self.superGuard]), EMPTY_MAP])
if atom is AUDIT_1:
audition = args[0]
if not isinstance(audition, Audition):
raise userError(u"not invoked with an Audition")
ast = audition.ast
if not isinstance(ast, Obj):
raise userError(u"audition not created with an object expr")
methods = ast._script._methods
for m in methods:
if isinstance(m, Method) and m._verb == u"coerce":
mguard = m._g
if isinstance(mguard, Noun):
rGSG = audition.getGuard(mguard.name)
if isinstance(rGSG, FinalSlotGuard):
rGSG0 = rGSG.valueGuard
if isinstance(rGSG0, SameGuard):
resultGuard = rGSG0.value
if optSame(resultGuard, self.superGuard) is EQUAL or (
SUPERSETOF_1 in self.superGuard.respondingAtoms()
and self.superGuard.call(u"supersetOf", [resultGuard]) is wrapBool(True)
):
return wrapBool(True)
raise userError(
u"%s does not have a result guard implying "
u"%s, but %s" % (audition.fqn, self.superGuard.toQuote(), resultGuard.toQuote())
)
raise userError(
u"%s does not have a determinable "
u"result guard, but <& %s> :%s" % (audition.fqn, mguard.name, rGSG.toQuote())
)
break
return self
if atom is PASSES_1:
return wrapBool(args[0].auditedBy(self))
if atom is COERCE_2:
specimen, ej = args[0], args[1]
if specimen.auditedBy(self):
return specimen
c = specimen.call(u"_conformTo", [self])
if c.auditedBy(self):
return c
throw(ej, StrObject(u"%s does not conform to %s" % (specimen.toQuote(), self.toQuote())))
raise Refused(self, atom, args)
def samenessFringe(original, path, fringe, sofar=None):
"""
Walk an object graph, building up the fringe.
Returns whether the graph is settled.
"""
# Resolve the object.
o = resolution(original)
# Handle primitive cases first.
if o in (NullObject, TrueObject, FalseObject):
return True
if (isinstance(o, CharObject) or isinstance(o, DoubleObject)
or isinstance(o, IntObject) or isinstance(o, BigInt)
or isinstance(o, StrObject) or isinstance(o, BytesObject)
or isinstance(o, TraversalKey)):
return True
if isinstance(o, ConstMap) and o.empty():
return True
if sofar is None:
sofar = {}
elif o in sofar:
return True
if isinstance(o, ConstList):
sofar[o] = None
return listFringe(o, fringe, path, sofar)
if selfless in o.auditorStamps():
if transparentStamp in o.auditorStamps():
sofar[o] = None
return samenessFringe(o.call(u"_uncall", []), path, fringe, sofar)
if semitransparentStamp in o.auditorStamps():
sofar[o] = None
p = o.call(u"_uncall", [])
if not isinstance(p, SealedPortrayal):
userError(
u'Semitransparent portrayal was not a SealedPortrayal!')
return samenessFringe(p, path, fringe, sofar)
if isResolved(o):
return True
# Welp, it's unsettled.
if fringe is not None:
fringe.append(FringeNode(o, path))
return False
def recv(self, atom, args):
if atom is GETCONTENTS_0:
return self.open(openGetContentsCB, flags=os.O_RDONLY, mode=0000)
if atom is SETCONTENTS_1:
data = unwrapBytes(args[0])
sibling = self.temporarySibling(".setContents")
p, r = makePromise()
vat = currentVat.get()
uv_loop = vat.uv_loop
fs = ruv.alloc_fs()
path = sibling.asBytes()
# Use CREAT | EXCL to cause a failure if the temporary file
# already exists.
flags = os.O_WRONLY | os.O_CREAT | os.O_EXCL
sc = SetContents(vat, data, r, sibling, self)
ruv.stashFS(fs, (vat, sc))
ruv.fsOpen(uv_loop, fs, path, flags, 0777, openSetContentsCB)
return p
if atom is OPENFOUNT_0:
return self.open(openFountCB, flags=os.O_RDONLY, mode=0000)
if atom is OPENDRAIN_0:
# Create the file if it doesn't yet exist, and truncate it if it
# does. Trust the umask to be reasonable for now.
flags = os.O_CREAT | os.O_WRONLY
# XXX this behavior should be configurable via namedarg?
flags |= os.O_TRUNC
return self.open(openDrainCB, flags=flags, mode=0777)
if atom is RENAME_1:
fr = args[0]
if not isinstance(fr, FileResource):
raise userError(u"rename/1: Must be file resource")
return self.rename(fr.asBytes())
if atom is SIBLING_1:
name = unwrapStr(args[0])
if u'/' in name:
raise userError(u"sibling/1: Illegal file name '%s'" % name)
return self.sibling(name.encode("utf-8"))
if atom is TEMPORARYSIBLING_0:
return self.temporarySibling(".new")
raise Refused(self, atom, args)
def samenessFringe(original, path, fringe, sofar=None):
"""
Walk an object graph, building up the fringe.
Returns whether the graph is settled.
"""
# Resolve the object.
o = resolution(original)
# Handle primitive cases first.
if o in (NullObject, TrueObject, FalseObject):
return True
if (isinstance(o, CharObject) or isinstance(o, DoubleObject) or
isinstance(o, IntObject) or isinstance(o, BigInt) or
isinstance(o, StrObject) or isinstance(o, BytesObject) or
isinstance(o, TraversalKey)):
return True
if isinstance(o, ConstMap) and o.empty():
return True
if sofar is None:
sofar = {}
elif o in sofar:
return True
if isinstance(o, ConstList):
sofar[o] = None
return listFringe(o, fringe, path, sofar)
if selfless in o.auditorStamps():
if transparentStamp in o.auditorStamps():
sofar[o] = None
return samenessFringe(o.call(u"_uncall", []), path, fringe, sofar)
if semitransparentStamp in o.auditorStamps():
sofar[o] = None
p = o.call(u"_uncall", [])
if not isinstance(p, SealedPortrayal):
userError(u'Semitransparent portrayal was not a SealedPortrayal!')
return samenessFringe(p, path, fringe, sofar)
if isResolved(o):
return True
# Welp, it's unsettled.
if fringe is not None:
fringe.append(FringeNode(o, path))
return False
def recv(self, atom, args):
if atom is GETCONTENTS_0:
return self.open(openGetContentsCB, flags=os.O_RDONLY, mode=0000)
if atom is SETCONTENTS_1:
data = unwrapBytes(args[0])
sibling = self.temporarySibling(".setContents")
p, r = makePromise()
vat = currentVat.get()
uv_loop = vat.uv_loop
fs = ruv.alloc_fs()
path = sibling.asBytes()
# Use CREAT | EXCL to cause a failure if the temporary file
# already exists.
flags = os.O_WRONLY | os.O_CREAT | os.O_EXCL
sc = SetContents(vat, data, r, sibling, self)
ruv.stashFS(fs, (vat, sc))
ruv.fsOpen(uv_loop, fs, path, flags, 0777, openSetContentsCB)
return p
if atom is OPENFOUNT_0:
return self.open(openFountCB, flags=os.O_RDONLY, mode=0000)
if atom is OPENDRAIN_0:
# Create the file if it doesn't yet exist, and truncate it if it
# does. Trust the umask to be reasonable for now.
flags = os.O_CREAT | os.O_WRONLY
# XXX this behavior should be configurable via namedarg?
flags |= os.O_TRUNC
return self.open(openDrainCB, flags=flags, mode=0777)
if atom is RENAME_1:
fr = args[0]
if not isinstance(fr, FileResource):
raise userError(u"rename/1: Must be file resource")
return self.rename(fr.asBytes())
if atom is SIBLING_1:
name = unwrapStr(args[0])
if u'/' in name:
raise userError(u"sibling/1: Illegal file name '%s'" % name)
return self.sibling(name.encode("utf-8"))
if atom is TEMPORARYSIBLING_0:
return self.temporarySibling(".new")
raise Refused(self, atom, args)
def pop(self):
from typhon.objects.collections.lists import ConstList
if self.objectMap:
key, value = self.objectMap.popitem()
return ConstList([key, value])
else:
raise userError(u"pop/0: Pop from empty map")
def put(self, index, value):
top = len(self._l)
if 0 <= index < top:
self._l[index] = self.coerce(value)
else:
raise userError(u"put/2: Index %d out of bounds for list of length %d" %
(index, top))
def withIndex(self, index, value):
# Make a new ConstList.
if not (0 < index < len(self._l)):
raise userError(u"with/2: Index %d is out of bounds" % index)
new = self._l[:]
new[index] = value
return new
def run(self, executable, argv, env, stdinFount=None, stdoutDrain=None,
stderrDrain=None, stdin=False, stdout=False, stderr=False):
# Sixth incarnation: Now with streamcaps!
# Unwrap argv.
l = []
for arg in argv:
bs = unwrapBytes(arg)
assert bs is not None, "proven impossible"
l.append(bs)
argv = l
# Unwrap and prep environment.
d = {}
for (k, v) in env.items():
d[unwrapBytes(k)] = unwrapBytes(v)
packedEnv = [k + '=' + v for (k, v) in d.items()]
env = d
vat = currentVat.get()
# Set up the list of streams and attach streamcaps.
stdinSink = nullSink
stdoutSource = stderrSource = emptySource
streams = []
if stdin:
stream = ruv.rffi.cast(ruv.stream_tp,
ruv.alloc_pipe(vat.uv_loop))
streams.append(stream)
wrapped = ruv.wrapStream(stream, 1)
stdinSink = StreamSink(wrapped, vat)
else:
streams.append(nullptr(ruv.stream_t))
if stdout:
stream = ruv.rffi.cast(ruv.stream_tp,
ruv.alloc_pipe(vat.uv_loop))
streams.append(stream)
wrapped = ruv.wrapStream(stream, 1)
stdoutSource = StreamSource(wrapped, vat)
else:
streams.append(nullptr(ruv.stream_t))
if stderr:
stream = ruv.rffi.cast(ruv.stream_tp,
ruv.alloc_pipe(vat.uv_loop))
streams.append(stream)
wrapped = ruv.wrapStream(stream, 1)
stderrSource = StreamSource(wrapped, vat)
else:
streams.append(nullptr(ruv.stream_t))
try:
process = ruv.allocProcess()
sub = SubProcess(vat, process, argv, env, stdin=stdinSink,
stdout=stdoutSource, stderr=stderrSource)
vat.enqueueEvent(SpawnProcessIOEvent(
vat, sub, process, executable, argv, packedEnv, streams))
return sub
except ruv.UVError as uve:
raise userError(u"makeProcess: Couldn't spawn process: %s" %
uve.repr().decode("utf-8"))
def put(self, index, value):
top = self.strategy.size(self)
if 0 <= index <= top:
self.strategy.store(self, index, value)
else:
raise userError(u"put/2: Index %d out of bounds for list of length %d" %
(index, top))
def withIndex(self, index, value):
# Make a new ConstList.
if index >= self.strategy.size(self) or index < 0:
raise userError(u"with/2: Index %d is out of bounds" % index)
new = self.strategy.fetch_all(self)[:]
new[index] = value
return new
def withIndex(self, index, value):
# Make a new ConstList.
if index >= self.strategy.size(self) or index < 0:
raise userError(u"with/2: Index %d is out of bounds" % index)
new = self.strategy.fetch_all(self)[:]
new[index] = value
return new
def eq(self, other):
if not isinstance(other, Proxy):
return False
if self.checkSlot() or other.checkSlot():
raise userError(u"equals comparison of resolved proxy is"
u" impossible")
return optSame(self.handler, other.handler) is EQUAL
def fromSecretBytes(self, secretKey):
expectedSize = intmask(rsodium.cryptoBoxSecretkeybytes())
if len(secretKey) != expectedSize:
message = u"Expected key length of %d bytes, not %d" % (
expectedSize, len(secretKey))
raise userError(message)
return SecretKey(secretKey)
def resolveKey(key):
from typhon.objects.refs import Promise, isResolved
if isinstance(key, Promise):
key = key.resolution()
if not isResolved(key):
raise userError(u"Unresolved promises cannot be used as map keys")
return key
def insert(self, index, value):
if 0 <= index < len(self._l):
self._l.insert(index, self.coerce(value))
elif index == len(self._l):
self._l.append(self.coerce(value))
else:
raise userError(u"insert/2: Index %d is out of bounds" % index)
def makeProxy(handler, resolutionBox, resolved):
if not isSettled(handler):
raise userError(u"Proxy handler not settled")
if unwrapBool(resolved):
return FarRef(handler, resolutionBox)
else:
return RemotePromise(handler, resolutionBox)
def fromPublicBytes(self, publicKey):
expectedSize = intmask(rsodium.cryptoBoxPublickeybytes())
if len(publicKey) != expectedSize:
message = u"Expected key length of %d bytes, not %d" % (
expectedSize, len(publicKey))
raise userError(message)
return PublicKey(publicKey)
def __init__(self, vat, handler, resolutionBox):
if not handler.isSettled():
raise userError(u"Proxy handler not settled: " +
handler.toString())
self.vat = vat
self.handler = handler
self.resolutionBox = resolutionBox
def _resolve(self, target, strict=True):
if self._ref is None:
if strict:
raise userError(u"Already resolved")
return False
else:
if self.guard is not None and not isinstance(target,
UnconnectedRef):
# Coerce. If there's a problem, then smash the promise.
with Ejector() as ej:
try:
target = self.guard.call(u"coerce", [target, ej])
except Ejecting as e:
if e.ejector is not ej:
raise
target = UnconnectedRef(self.vat, e.value)
except UserException as ue:
from typhon.objects.exceptions import sealException
target = UnconnectedRef(self.vat, sealException(ue))
self._ref.setTarget(_toRef(target, self.vat))
self._ref.commit()
self._buf.deliverAll(target)
self._ref = None
self._buf = None
return True
def makeProxy(handler, resolutionBox, resolved):
if not isSettled(handler):
raise userError(u"Proxy handler not settled")
if unwrapBool(resolved):
return FarRef(handler, resolutionBox)
else:
return RemotePromise(handler, resolutionBox)
def callAll(self, atom, args, namedArgs):
if self.isSwitchable:
raise userError(u"not synchronously callable (%s)" %
atom.repr.decode("utf-8"))
else:
self.resolutionRef()
return self._target.callAll(atom, args, namedArgs)
def eq(self, other):
if not isinstance(other, Proxy):
return False
if self.checkSlot() or other.checkSlot():
raise userError(u"equals comparison of resolved proxy is"
u" impossible")
return optSame(self.handler, other.handler) is EQUAL
def recv(self, atom, args):
if atom is ISSETTLED_1:
return wrapBool(isSettled(args[0]))
if atom is OPTSAME_2:
first, second = args
result = optSame(first, second)
if result is NOTYET:
return NullObject
return wrapBool(result is EQUAL)
if atom is SAMEEVER_2:
first, second = args
result = optSame(first, second)
if result is NOTYET:
raise userError(u"Not yet settled!")
return wrapBool(result is EQUAL)
if atom is SAMEYET_2:
first, second = args
result = optSame(first, second)
return wrapBool(result is EQUAL)
if atom is MAKETRAVERSALKEY_1:
return TraversalKey(args[0])
raise Refused(self, atom, args)
def __init__(self, handler, resolutionBox):
if not isSettled(handler):
raise userError(u"Proxy handler not settled: " +
handler.toString())
self.handler = handler
self.resolutionBox = resolutionBox
self.committed = False
def __init__(self, handler, resolutionBox):
if not isSettled(handler):
raise userError(u"Proxy handler not settled: " +
handler.toString())
self.handler = handler
self.resolutionBox = resolutionBox
self.committed = False
def callAll(self, atom, args, namedArgs):
if self.isSwitchable:
raise userError(u"not synchronously callable (%s)" %
atom.repr.decode("utf-8"))
else:
self.resolutionRef()
return self._target.callAll(atom, args, namedArgs)
def recv(self, atom, args):
if atom is ISSETTLED_1:
return wrapBool(isSettled(args[0]))
if atom is OPTSAME_2:
first, second = args
result = optSame(first, second)
if result is NOTYET:
return NullObject
return wrapBool(result is EQUAL)
if atom is SAMEEVER_2:
first, second = args
result = optSame(first, second)
if result is NOTYET:
raise userError(u"Not yet settled!")
return wrapBool(result is EQUAL)
if atom is SAMEYET_2:
first, second = args
result = optSame(first, second)
return wrapBool(result is EQUAL)
if atom is MAKETRAVERSALKEY_1:
return TraversalKey(args[0])
raise Refused(self, atom, args)
def makeProcess(executable, args, environment):
"""
Create a subordinate process on the current node from the given
executable, arguments, and environment.
"""
# Third incarnation: libuv-powered and requiring bytes.
executable = unwrapBytes(executable)
# This could be an LC, but doing it this way fixes the RPython annotation
# for the list to be non-None.
argv = []
for arg in unwrapList(args):
s = unwrapBytes(arg)
assert s is not None, "proven impossible by hand"
argv.append(s)
env = {}
for (k, v) in unwrapMap(environment).items():
env[unwrapBytes(k)] = unwrapBytes(v)
packedEnv = [k + '=' + v for (k, v) in env.items()]
vat = currentVat.get()
try:
process = ruv.allocProcess()
sub = SubProcess(vat, process, argv, env)
ruv.spawn(vat.uv_loop,
process,
file=executable,
args=argv,
env=packedEnv)
sub.retrievePID()
return sub
except ruv.UVError as uve:
raise userError(u"makeProcess: Couldn't spawn process: %s" %
uve.repr().decode("utf-8"))
def unseal(self, cipher, nonce):
try:
message = rsodium.boxUnseal(cipher, nonce, self.publicKey,
self.secretKey)
except rsodium.SodiumError:
raise userError(u"unseal/2: Couldn't open this box")
return message
def resolveKey(key):
from typhon.objects.refs import Promise, isResolved
if isinstance(key, Promise):
key = key.resolution()
if not isResolved(key):
raise userError(u"Unresolved promises cannot be used as map keys")
return key
def put(self, index, value):
top = self.strategy.size(self)
if 0 <= index < top:
self.strategy.store(self, index, value)
else:
raise userError(
u"put/2: Index %d out of bounds for list of length %d" %
(index, top))
def slice(self, start):
if start < 0:
raise userError(u"slice/1: Negative start")
keys = self.objectSet.keys()[start:]
rv = monteSet()
for k in keys:
rv[k] = None
return rv
def slice(self, start):
if start < 0:
raise userError(u"slice/1: Negative start")
items = self.objectMap.items()[start:]
rv = monteMap()
for k, v in items:
rv[k] = v
return rv
def throw(ej, payload):
if ej is None or ej is NullObject:
raise UserException(payload)
if isinstance(ej, Ejector):
ej.fire(payload)
else:
ej.call(u"run", [payload])
raise userError(u"Ejector did not exit")
def recv(self, atom, args):
# _makeIterator/0: Create an iterator for this collection's contents.
if atom is _MAKEITERATOR_0:
return self._makeIterator()
if atom is _PRINTON_1:
printer = args[0]
self.printOn(printer)
return NullObject
# contains/1: Determine whether an element is in this collection.
if atom is CONTAINS_1:
return wrapBool(self.contains(args[0]))
# size/0: Get the number of elements in the collection.
if atom is SIZE_0:
return IntObject(self.size())
# slice/1 and slice/2: Select a subrange of this collection.
if atom is SLICE_1:
start = unwrapInt(args[0])
try:
return self.slice(start)
except IndexError:
raise userError(u"slice/1: Index out of bounds")
# slice/1 and slice/2: Select a subrange of this collection.
if atom is SLICE_2:
start = unwrapInt(args[0])
stop = unwrapInt(args[1])
try:
return self.slice(start, stop)
except IndexError:
raise userError(u"slice/1: Index out of bounds")
# snapshot/0: Create a new constant collection with a copy of the
# current collection's contents.
if atom is SNAPSHOT_0:
return self.snapshot()
if atom is JOIN_1:
l = unwrapList(args[0])
return self.join(l)
return self._recv(atom, args)
def multiply(self, count):
# multiply/1: Create a new list by repeating this list's contents.
if count < 0:
raise userError(u"multiply/1: Can't multiply list %d times" %
count)
elif count == 0:
return []
else:
return self.objs * count
def fromPairs(wrappedPairs):
from typhon.objects.collections.lists import unwrapList
d = monteMap()
for obj in unwrapList(wrappedPairs):
pair = unwrapList(obj)
if len(pair) != 2:
raise userError(u"fromPairs/1: Not a pair")
d[pair[0]] = pair[1]
return ConstMap(d)
def isSameEver(first, second):
"""
Call this instead of _equalizer.sameEver/2.
"""
result = optSame(first, second)
if result is NOTYET:
raise userError(u"Not yet settled!")
return result is EQUAL
def eq(self, other):
if not isinstance(other, DisconnectedRef):
return False
result = (isSameEver(self.handler, other.handler) and isSameEver(
self.resolutionIdentity, other.resolutionIdentity))
if (result and not isSameEver(self._problem, other._problem)):
raise userError(u"Ref invariant violation: disconnected refs with "
u" same identity but different problems")
return result
def ensureByte(char):
"""
Like chr(ord(char)), but throws on failure.
"""
if not u'\x00' <= char <= u'\xff':
raise userError(u"Unacceptable bytestring character: " +
quoteChar(char))
return chr(ord(char))
def run(self, data):
if self.closed:
raise userError(u"run/1: Couldn't write to closged file")
sb = ruv.scopedBufs([data], self)
bufs = sb.allocate()
fs = ruv.alloc_fs()
ruv.stashFS(fs, (self._vat, sb))
ruv.fsWrite(self._vat.uv_loop, fs, self._fd, bufs, 1, -1, writeFileCB)
def resolveKey(key):
from typhon.objects.refs import Promise, isResolved
if isinstance(key, Promise):
key = key.resolution()
# Do the resolution check again.
if not isResolved(key):
raise userError(u"Unresolved promises cannot be used as map keys")
# If the original key wasn't a promise, then no checks are needed.
return key
def run(self, data):
if self.closed:
raise userError(u"run/1: Couldn't send to closed stream")
# XXX backpressure?
uv_write = ruv.alloc_write()
sb = ruv.scopedBufs([data], self)
bufs = sb.allocate()
ruv.stashWrite(uv_write, (self._vat, sb))
ruv.write(uv_write, self._stream._stream, bufs, 1, writeStreamCB)
def audit(self, audition):
from typhon.objects.user import Audition
if not isinstance(audition, Audition):
raise userError(u"not an Audition")
from typhon.metrics import globalRecorder
with globalRecorder().context("Audition (DF)"):
auditDeepFrozen(audition)
audition.ask(deepFrozenStamp)
return False
def ask(self, auditor):
if not self.active:
self.log(u"ask/1: Stolen audition: %s" % pemci, tags=["serious"])
raise userError(u"Audition is out of scope")
cached = False
self.askedLog.append(auditor)
if auditor in self.cache:
answer, asked, guards = self.cache[auditor]
self.log(u"ask/1: %s: %s (cached)" %
(auditor.toString(), boolStr(answer)))
for name, value in guards:
# We remember what the binding guards for the previous
# invocation were.
if self.guards[name] != value:
# If any of them have changed, we need to re-audit.
self.log(u"ask/1: %s: Invalidating" % name)
break
else:
# XXX stopgap: Ignore negative answers in the cache.
cached = answer
if cached:
for a in asked:
# We remember the other auditors invoked during this
# audition. Let's re-ask them since not all of them may have
# cacheable results.
self.log(u"ask/1: Reasking %s" % auditor.toString())
answer = self.ask(a)
return answer
else:
# This seems a little convoluted, but the idea is that the logs
# are written to during the course of the audition, and then
# copied out to the cache afterwards.
prevlogs = self.askedLog, self.guardLog
self.askedLog = []
self.guardLog = []
try:
result = unwrapBool(auditor.call(u"audit", [self]))
if self.guardLog is None:
self.log(u"ask/1: %s: %s (uncacheable)" %
(auditor.toString(), boolStr(result)))
else:
self.log(u"ask/1: %s: %s" %
(auditor.toString(), boolStr(result)))
self.cache[auditor] = (result, self.askedLog[:],
self.guardLog[:])
return result
finally:
self.askedLog, self.guardLog = prevlogs
self.log(u"ask/1: %s: failure" % auditor.toString())
return False
