closes #152, with future work needed to help Windows mutli-threaded applications

py25/bacpypes/core.py

@@ -144,6 +144,9 @@ def run(spin=SPIN, sigterm=stop, sigusr1=print_stack):
                 time.sleep(sleeptime)
                 delta -= sleeptime
 
+            # delta should be no more than the spin value
+            delta = min(delta, spin)
+
             # if there are deferred functions, use a small delta
             if deferredFns:
                 delta = min(delta, 0.001)

py27/bacpypes/core.py

@@ -142,6 +142,9 @@ def run(spin=SPIN, sigterm=stop, sigusr1=print_stack):
                 time.sleep(sleeptime)
                 delta -= sleeptime
 
+            # delta should be no more than the spin value
+            delta = min(delta, spin)
+
             # if there are deferred functions, use a small delta
             if deferredFns:
                 delta = min(delta, 0.001)

py34/bacpypes/core.py

@@ -142,6 +142,9 @@ def run(spin=SPIN, sigterm=stop, sigusr1=print_stack):
                 time.sleep(sleeptime)
                 delta -= sleeptime
 
+            # delta should be no more than the spin value
+            delta = min(delta, spin)
+
             # if there are deferred functions, use a small delta
             if deferredFns:
                 delta = min(delta, 0.001)

samples/COVServer.py

@@ -6,11 +6,15 @@ The console accepts commands that change the properties of an object that
 triggers the notifications.
 """
 
+import time
+from threading import Thread
+
 from bacpypes.debugging import bacpypes_debugging, ModuleLogger
 from bacpypes.consolelogging import ConfigArgumentParser
 from bacpypes.consolecmd import ConsoleCmd
 
-from bacpypes.core import run, enable_sleeping
+from bacpypes.core import run, deferred, enable_sleeping
+from bacpypes.task import RecurringTask
 
 from bacpypes.app import BIPSimpleApplication
 from bacpypes.object import AnalogValueObject, BinaryValueObject
@@ -22,6 +26,8 @@ _debug = 0
 _log = ModuleLogger(globals())
 
 # test globals
+test_av = None
+test_bv = None
 test_application = None
 
 #
@@ -180,8 +186,147 @@ class COVConsoleCmd(ConsoleCmd):
             print("exception: %s" % (err,))
 
 
+@bacpypes_debugging
+class TestAnalogValueTask(RecurringTask):
+
+    """
+    An instance of this class is created when '--avtask <interval>' is
+    specified as a command line argument.  Every <interval> seconds it
+    changes the value of the test_av present value.
+    """
+
+    def __init__(self, interval):
+        if _debug: TestAnalogValueTask._debug("__init__ %r", interval)
+        RecurringTask.__init__(self, interval * 1000)
+
+        # make a list of test values
+        self.test_values = list(float(i * 10) for i in range(10))
+
+    def process_task(self):
+        if _debug: TestAnalogValueTask._debug("process_task")
+        global test_av
+
+        # pop the next value
+        next_value = self.test_values.pop(0)
+        self.test_values.append(next_value)
+        if _debug: TestAnalogValueTask._debug("    - next_value: %r", next_value)
+
+        # change the point
+        test_av.presentValue = next_value
+
+
+@bacpypes_debugging
+class TestAnalogValueThread(Thread):
+
+    """
+    An instance of this class is created when '--avthread <interval>' is
+    specified as a command line argument.  Every <interval> seconds it
+    changes the value of the test_av present value.
+    """
+
+    def __init__(self, interval):
+        if _debug: TestAnalogValueThread._debug("__init__ %r", interval)
+        Thread.__init__(self)
+
+        # runs as a daemon
+        self.daemon = True
+
+        # save the interval
+        self.interval = interval
+
+        # make a list of test values
+        self.test_values = list(100.0 + float(i * 10) for i in range(10))
+
+    def run(self):
+        if _debug: TestAnalogValueThread._debug("run")
+        global test_av
+
+        while True:
+            # pop the next value
+            next_value = self.test_values.pop(0)
+            self.test_values.append(next_value)
+            if _debug: TestAnalogValueThread._debug("    - next_value: %r", next_value)
+
+            # change the point
+            test_av.presentValue = next_value
+
+            # sleep
+            time.sleep(self.interval)
+
+
+@bacpypes_debugging
+class TestBinaryValueTask(RecurringTask):
+
+    """
+    An instance of this class is created when '--bvtask <interval>' is
+    specified as a command line argument.  Every <interval> seconds it
+    changes the value of the test_bv present value.
+    """
+
+    def __init__(self, interval):
+        if _debug: TestBinaryValueTask._debug("__init__ %r", interval)
+        RecurringTask.__init__(self, interval * 1000)
+
+        # save the interval
+        self.interval = interval
+
+        # make a list of test values
+        self.test_values = [True, False]
+
+    def process_task(self):
+        if _debug: TestBinaryValueTask._debug("process_task")
+        global test_bv
+
+        # pop the next value
+        next_value = self.test_values.pop(0)
+        self.test_values.append(next_value)
+        if _debug: TestBinaryValueTask._debug("    - next_value: %r", next_value)
+
+        # change the point
+        test_bv.presentValue = next_value
+
+
+@bacpypes_debugging
+class TestBinaryValueThread(RecurringTask, Thread):
+
+    """
+    An instance of this class is created when '--bvthread <interval>' is
+    specified as a command line argument.  Every <interval> seconds it
+    changes the value of the test_bv present value.
+    """
+
+    def __init__(self, interval):
+        if _debug: TestBinaryValueThread._debug("__init__ %r", interval)
+        Thread.__init__(self)
+
+        # runs as a daemon
+        self.daemon = True
+
+        # save the interval
+        self.interval = interval
+
+        # make a list of test values
+        self.test_values = [True, False]
+
+    def run(self):
+        if _debug: TestBinaryValueThread._debug("run")
+        global test_bv
+
+        while True:
+            # pop the next value
+            next_value = self.test_values.pop(0)
+            self.test_values.append(next_value)
+            if _debug: TestBinaryValueThread._debug("    - next_value: %r", next_value)
+
+            # change the point
+            test_bv.presentValue = next_value
+
+            # sleep
+            time.sleep(self.interval)
+
+
 def main():
-    global test_application
+    global test_av, test_bv, test_application
 
     # make a parser
     parser = ConfigArgumentParser(description=__doc__)
@@ -191,6 +336,28 @@ def main():
         help="create a console",
         )
 
+    # analog value task and thread
+    parser.add_argument("--avtask", type=float,
+        help="analog value recurring task",
+        )
+    parser.add_argument("--avthread", type=float,
+        help="analog value thread",
+        )
+
+    # analog value task and thread
+    parser.add_argument("--bvtask", type=float,
+        help="binary value recurring task",
+        )
+    parser.add_argument("--bvthread", type=float,
+        help="binary value thread",
+        )
+
+    # provide a different spin value
+    parser.add_argument("--spin", type=float,
+        help="spin time",
+        default=1.0,
+        )
+
     # parse the command line arguments
     args = parser.parse_args()
 
@@ -209,18 +376,6 @@ def main():
     # make a sample application
     test_application = SubscribeCOVApplication(test_device, args.ini.address)
 
-    # make a binary value object
-    test_bv = BinaryValueObject(
-        objectIdentifier=('binaryValue', 1),
-        objectName='bv',
-        presentValue='inactive',
-        statusFlags=[0, 0, 0, 0],
-        )
-    _log.debug("    - test_bv: %r", test_bv)
-
-    # add it to the device
-    test_application.add_object(test_bv)
-
     # make an analog value object
     test_av = AnalogValueObject(
         objectIdentifier=('analogValue', 1),
@@ -235,6 +390,18 @@ def main():
     test_application.add_object(test_av)
     _log.debug("    - object list: %r", test_device.objectList)
 
+    # make a binary value object
+    test_bv = BinaryValueObject(
+        objectIdentifier=('binaryValue', 1),
+        objectName='bv',
+        presentValue='inactive',
+        statusFlags=[0, 0, 0, 0],
+        )
+    _log.debug("    - test_bv: %r", test_bv)
+
+    # add it to the device
+    test_application.add_object(test_bv)
+
     # get the services supported
     services_supported = test_application.get_services_supported()
     if _debug: _log.debug("    - services_supported: %r", services_supported)
@@ -250,9 +417,29 @@ def main():
         # enable sleeping will help with threads
         enable_sleeping()
 
+    # analog value task
+    if args.avtask:
+        test_av_task = TestAnalogValueTask(args.avtask)
+        test_av_task.install_task()
+
+    # analog value thread
+    if args.avthread:
+        test_av_thread = TestAnalogValueThread(args.avthread)
+        deferred(test_av_thread.start)
+
+    # binary value task
+    if args.bvtask:
+        test_bv_task = TestBinaryValueTask(args.bvtask)
+        test_bv_task.install_task()
+
+    # binary value thread
+    if args.bvthread:
+        test_bv_thread = TestBinaryValueThread(args.bvthread)
+        deferred(test_bv_thread.start)
+
     _log.debug("running")
 
-    run()
+    run(args.spin)
 
     _log.debug("fini")