def test_constant_variable_ca(ca_server):
# COMMENTING OUT BELOW LEADS TO FAILED TEST, HANGING, AND ERROR MESSAGES:
# CAC TCP socket linger set error was Invalid argument
# CAC TCP socket shutdown error was Socket is not connected
os.environ["PYEPICS_LIBCA"] = get_lib('ca')
val = epics.caget("test:pv1", timeout=5.0)
assert val == 1.0
def test_constant_variable_ca(value, prefix, server, model):
os.environ["PYEPICS_LIBCA"] = get_lib('ca')
# check constant variable assignment
for _, variable in model.input_variables.items():
pvname = f"{prefix}:{variable.name}"
if variable.variable_type == "scalar":
epics.caput(pvname, value, timeout=1)
for _, variable in model.input_variables.items():
if variable.variable_type == "scalar":
pvname = f"{prefix}:{variable.name}"
val = epics.caget(pvname, timeout=1)
if variable.is_constant:
assert val != value
else:
assert val == value
def _libca_path(load_libca_path):
# We look for libca in a variety of different places, searched in order:
#
# 1. Firstly if CATOOLS_LIBCA_PATH is set in the environment we take that as
# gospel. This allows the remaining search to be overridden.
# 2. If epicscorelibs is installed, allow it to provide libca.
# 3. If the libca_path module is present we accept the value it defines.
# 4. Finally check for EPICS_BASE and compute appropriate architecture.
# First allow a forced override
libca_path = os.environ.get('CATOOLS_LIBCA_PATH')
if libca_path:
return libca_path
# If epicscorelibs is installed, use the bundled libca.
try:
from epicscorelibs.path import get_lib
return get_lib('ca')
except ImportError:
pass
# Next import from configuration file if present, unless this has been
# disabled.
if load_libca_path:
try:
# If libca_path has been defined go with that
from .libca_path import libca_path
return libca_path
except ImportError:
pass
# If no libca_path, how about local copies of the files?
libca_path = os.path.abspath(os.path.dirname(__file__))
if os.path.isfile(os.path.join(libca_path, lib_files[-1])):
# Yes, there seems to be something locally installed.
return libca_path
# No local install, no local configuration, no override. Try for standard
# environment variable configuration instead.
epics_base = os.environ['EPICS_BASE']
return os.path.join(epics_base, 'lib', epics_host_arch)
# Event type notification codes for camonitor
'DBE_VALUE', # Notify normal value changes
'DBE_LOG', # Notify archival value changes
'DBE_ALARM', # Notify alarm state changes
'DBE_PROPERTY', # Notify property change events (3.14.11 and later)
]
import ctypes
from epicscorelibs import path
from . import py23
if path.OS_CLASS == "WIN32":
# On windows, use stdcall calling convention for libca
libca = ctypes.WinDLL(path.get_lib("ca"), ctypes.RTLD_GLOBAL)
else:
libca = ctypes.CDLL(path.get_lib("ca"), ctypes.RTLD_GLOBAL)
# -----------------------------------------------------------------------------
# Enumeration and error code definitions.
# Flags used to identify notification events to request for subscription.
DBE_VALUE = 1
DBE_LOG = 2
DBE_ALARM = 4
DBE_PROPERTY = 8
# Connection state as passed to connection handler
CA_OP_CONN_UP = 6
CA_OP_CONN_DOWN = 7
import os, epics
from epicscorelibs.path import get_lib
# Works regardless of whether the below line is commented out
os.environ["PYEPICS_LIBCA"] = get_lib('ca')
val = epics.caget("test:pv1", timeout=5.0)
if val:
print(f"Successful, test:pv1 is {val}")
print(epics.ca.find_libca())
"EPICS_PVAS_BEACON_PERIOD": "15",
"EPICS_PVAS_BROADCAST_PORT": "60858",
"EPICS_PVAS_INTF_ADDR_LIST": "127.0.0.1:0",
"EPICS_PVAS_MAX_ARRAY_BYTES": "16384",
"EPICS_PVAS_PROVIDER_NAMES": "3a7aff4f-8fd4-4f9f-b696-bd9f5f6f13ed",
"EPICS_PVAS_SERVER_PORT": "61192",
"EPICS_PVA_ADDR_LIST": "127.0.0.1",
"EPICS_PVA_AUTO_ADDR_LIST": "NO",
"EPICS_PVA_BEACON_PERIOD": "15",
"EPICS_PVA_BROADCAST_PORT": "60858",
"EPICS_PVA_MAX_ARRAY_BYTES": "16384",
"EPICS_PVA_SERVER_PORT": "61192",
}
os.environ.update(PVA_CONFIG)
os.environ["PYEPICS_LIBCA"] = get_lib("ca")
@pytest.fixture(scope="session", autouse=True)
def rootdir():
package_path = abspath(dirname(dirname(dirname(__file__))))
return package_path
def clear_loggers():
"""
Remove handlers from all loggers
"""
import logging
loggers = [logging.getLogger()] + list(