def solve_low_level(gams_folder, sim_folder, output_lst=False, logoption=3):
"""Use lower level apis to run GAMS. BAsed on GAMS xpexample2.py"""
from gamsxcc import new_gamsxHandle_tp, gamsxRunExecDLL, gamsxFree, gamsxCreateD, GMS_SSSIZE
from optcc import new_optHandle_tp, optReadDefinition, optSetStrStr, optSetIntStr, optHandleToPtr, optFree, \
optCreateD
sim_folder = force_str(sim_folder)
gams_folder = force_str(gams_folder)
model = os.path.abspath(os.path.join(sim_folder, 'UCM_h.gms'))
def callGams(gamsxHandle, optHandle, sysDir, model):
deffile = force_str(sysDir + u'/optgams.def')
if optReadDefinition(optHandle, deffile):
logging.error("*** Error ReadDefinition, cannot read def file:" +
deffile)
return False
optSetStrStr(optHandle, "SysDir", sysDir)
optSetStrStr(optHandle, "WorkDir", sim_folder)
optSetStrStr(optHandle, "Input", model)
optSetIntStr(optHandle, "LogOption", logoption)
ret = gamsxRunExecDLL(gamsxHandle, optHandleToPtr(optHandle), sysDir,
1)
if ret[0] != 0:
logging.error("*** Error RunExecDLL: Error in GAMS call = " +
str(ret[1]))
if 'White space' in str(ret[1]):
logging.error(
"The Unix GAMS API does not accept white spaces. Move dispaset to a folder that does not contain white spaces"
)
return False
return True
optHandle = new_optHandle_tp()
gamsxHandle = new_gamsxHandle_tp()
try:
__ = gamsxCreateD(gamsxHandle, gams_folder, GMS_SSSIZE)
__ = optCreateD(optHandle, gams_folder, GMS_SSSIZE)
time0 = time.time()
status = callGams(gamsxHandle, optHandle, gams_folder, model)
except Exception as e:
logging.error(
'The following error occured when trying to solve the model in gams: '
+ str(e))
return False
finally:
optFree(optHandle)
gamsxFree(gamsxHandle)
logging.info('Completed simulation in {0:.2f} seconds'.format(time.time() -
time0))
return status
def terminate(gamsxHandle, optHandle, rc):
optFree(optHandle)
gamsxFree(gamsxHandle)
os._exit(rc)