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Implemented initialization stage

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This commit is contained in:
Jose Luis Cercos Pita 2012-07-30 14:30:13 +02:00 committed by Yorik van Havre
parent 94c8489d0f
commit c5ec34318b
13 changed files with 747 additions and 98 deletions
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4
src/Mod/Ship/CMakeLists.txt
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@ -56,6 +56,7 @@ SET(ShipExamples_SRCS
Examples/s60_katamaran.fcstd
Examples/wigley.fcstd
Examples/wigley_katamaran.fcstd
OpenCL/simInit.cl
)
SOURCE_GROUP("shipexamples" FILES ${ShipExamples_SRCS})
@ -144,6 +145,9 @@ SET(SimRun_SRCS
simRun/Simulation.py
simRun/TaskPanel.py
simRun/TaskPanel.ui
simRun/Sim/__init__.py
simRun/Sim/initialization.py
simRun/Sim/Utils.py
)
SOURCE_GROUP("simrun" FILES ${SimRun_SRCS})

7
src/Mod/Ship/Makefile.am
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@ -53,6 +53,7 @@ nobase_data_DATA = \
Examples/s60_katamaran.fcstd \
Examples/wigley.fcstd \
Examples/wigley_katamaran.fcstd \
OpenCL/simInit.cl \
shipLoadExample/__init__.py \
shipLoadExample/TaskPanel.py \
shipLoadExample/TaskPanel.ui \
@ -96,7 +97,11 @@ nobase_data_DATA = \
simRun/__init__.py \
simRun/Simulation.py \
simRun/TaskPanel.py \
simRun/TaskPanel.ui
simRun/TaskPanel.ui \
simRun/Sim/__init__.py \
simRun/Sim/initialization.py
simRun/Sim/Utils.py
CLEANFILES = $(BUILT_SOURCES)

99
src/Mod/Ship/OpenCL/simInit.cl Normal file
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@ -0,0 +1,99 @@
/*
* -----------------------------------------------------------------------
*
* This source file is part of AQUA-gpusph.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor Boston, MA 02110-1301, USA
*
*
* Authors:
* - Cercos Pita, Jose Luis
* - Miguel Gonzalez, Leo
* - Saelices, Jaime
* - Souto Iglesias, Antonio
*
* -----------------------------------------------------------------------
*/
#ifndef M_PI
#define M_PI 3,14159265359
#endif
#ifdef _g
#error '_g' is already defined.
#endif
#define _g __global
#ifdef _l
#error '_l' is already defined.
#endif
#define _l __local
#ifdef _c
#error '_c' is already defined.
#endif
#define _c __constant
#ifndef _grav
#define _grav 9.81
#endif
/** Setup velocity and acceleration potential for initial time step.
* @param pos Cell position.
* @param v Cell velocity.
* @param f Cell acceleration.
* @param waves Waves (A,T,phase,heading)
* @param phi Velocity potential.
* @param Phi Acceleration potential
* @param N Number of cell elements at each direction.
* @param n Number of waves.
*/
__kernel void FS(_g float4* pos, _g float4* v, _g float4* f,
_g float4* waves, _g float* phi, _g float* Phi,
uint2 N, uint n)
{
// find position in global arrays
unsigned int i = get_global_id(0);
unsigned int j = get_global_id(1);
if( (i >= N.x) || (j >= N.y) )
return;
unsigned int id = i*N.y + j;
// ---- | ------------------------ | ----
// ---- V ---- Your code here ---- V ----
unsigned int w;
for(w=0;w<n;w++){
float A = waves[w].x;
float T = waves[w].y;
float phase = waves[w].z;
float heading = M_PI*waves[w].w/180.f;
float lambda = 0.5f*_grav/M_PI * T*T;
float k = 2.f*M_PI/lambda;
float frec = 2.f*M_PI/T;
float l = pos[id].x*cos(heading) + pos[id].y*sin(heading);
// Position, velocity and acceleration
float amp = A*sin(k*l + phase);
pos[id].z = amp;
v[id].z = -frec*amp;
f[id].z = frec*frec*amp;
// Potentials
phi[id] = _grav/frec*amp;
Phi[id] = -_grav*amp;
}
// ---- A ---- Your code here ---- A ----
// ---- | ------------------------ | ----
}

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src/Mod/Ship/shipUtils/Paths.pyc Normal file
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src/Mod/Ship/shipUtils/__init__.pyc Normal file
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57
src/Mod/Ship/simRun/Sim/Utils.py Normal file
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@ -0,0 +1,57 @@
#***************************************************************************
#* *
#* Copyright (c) 2011, 2012 *
#* Jose Luis Cercos Pita <jlcercos@gmail.com> *
#* *
#* This program is free software; you can redistribute it and/or modify *
#* it under the terms of the GNU Lesser General Public License (LGPL) *
#* as published by the Free Software Foundation; either version 2 of *
#* the License, or (at your option) any later version. *
#* for detail see the LICENCE text file. *
#* *
#* This program is distributed in the hope that it will be useful, *
#* but WITHOUT ANY WARRANTY; without even the implied warranty of *
#* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
#* GNU Library General Public License for more details. *
#* *
#* You should have received a copy of the GNU Library General Public *
#* License along with this program; if not, write to the Free Software *
#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
#* USA *
#* *
#***************************************************************************
# FreeCAD
from shipUtils import Paths
# pyOpenCL
import pyopencl as cl
import numpy as np
# Standard
import math
def loadProgram(context, file):
""" Loads a file and comnpile it.
@param context OpenCL context where apply.
@param file File to load and compile.
@return Ready to use OpenCL program.
"""
f = open(file, 'r')
str = "".join(f.readlines())
return cl.Program(context, str).build()
def clPath():
""" Gets the OpenCL kernels path
@return OpenCL kernels path
"""
path = Paths.modulePath() + "/OpenCL"
return path
def globalSize(n):
""" Compute global size from amount of data.
@param n Amount of data.
@return global size.
"""
localSize = 256.0
return int(math.ceil(n/localSize)*localSize)

58
src/Mod/Ship/simRun/Sim/Utils.py~ Normal file
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@ -0,0 +1,58 @@
#***************************************************************************
#* *
#* Copyright (c) 2011, 2012 *
#* Jose Luis Cercos Pita <jlcercos@gmail.com> *
#* *
#* This program is free software; you can redistribute it and/or modify *
#* it under the terms of the GNU Lesser General Public License (LGPL) *
#* as published by the Free Software Foundation; either version 2 of *
#* the License, or (at your option) any later version. *
#* for detail see the LICENCE text file. *
#* *
#* This program is distributed in the hope that it will be useful, *
#* but WITHOUT ANY WARRANTY; without even the implied warranty of *
#* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
#* GNU Library General Public License for more details. *
#* *
#* You should have received a copy of the GNU Library General Public *
#* License along with this program; if not, write to the Free Software *
#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
#* USA *
#* *
#***************************************************************************
# FreeCAD
from shipUtils import Paths
# pyOpenCL
import pyopencl as cl
import numpy as np
# Standard
import math
def loadProgram(context, file):
""" Loads a file and comnpile it.
@param context OpenCL context where apply.
@param file File to load and compile.
@return Ready to use OpenCL program.
"""
f = open(file, 'r')
str = "".join(f.readlines())
print(str)
return cl.Program(context, str).build()
def clPath():
""" Gets the OpenCL kernels path
@return OpenCL kernels path
"""
path = Paths.modulePath() + "/OpenCL"
return path
def globalSize(n):
""" Compute global size from amount of data.
@param n Amount of data.
@return global size.
"""
localSize = 256.0
return int(math.ceil(n/localSize)*localSize)

24
src/Mod/Ship/simRun/Sim/__init__.py Normal file
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@ -0,0 +1,24 @@
#***************************************************************************
#* *
#* Copyright (c) 2011, 2012 *
#* Jose Luis Cercos Pita <jlcercos@gmail.com> *
#* *
#* This program is free software; you can redistribute it and/or modify *
#* it under the terms of the GNU Lesser General Public License (LGPL) *
#* as published by the Free Software Foundation; either version 2 of *
#* the License, or (at your option) any later version. *
#* for detail see the LICENCE text file. *
#* *
#* This program is distributed in the hope that it will be useful, *
#* but WITHOUT ANY WARRANTY; without even the implied warranty of *
#* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
#* GNU Library General Public License for more details. *
#* *
#* You should have received a copy of the GNU Library General Public *
#* License along with this program; if not, write to the Free Software *
#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
#* USA *
#* *
#***************************************************************************
import initialization, Utils

57
src/Mod/Ship/simRun/Sim/__init__.py~ Normal file
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@ -0,0 +1,57 @@
#***************************************************************************
#* *
#* Copyright (c) 2011, 2012 *
#* Jose Luis Cercos Pita <jlcercos@gmail.com> *
#* *
#* This program is free software; you can redistribute it and/or modify *
#* it under the terms of the GNU Lesser General Public License (LGPL) *
#* as published by the Free Software Foundation; either version 2 of *
#* the License, or (at your option) any later version. *
#* for detail see the LICENCE text file. *
#* *
#* This program is distributed in the hope that it will be useful, *
#* but WITHOUT ANY WARRANTY; without even the implied warranty of *
#* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
#* GNU Library General Public License for more details. *
#* *
#* You should have received a copy of the GNU Library General Public *
#* License along with this program; if not, write to the Free Software *
#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
#* USA *
#* *
#***************************************************************************
# FreeCAD
from shipUtils import Paths
# pyOpenCL
import pyopencl as cl
import numpy as np
# Standard
import math
def loadProgram(context, file):
""" Loads a file and comnpile it.
@param context OpenCL context where apply.
@param file File to load and compile.
@return Ready to use OpenCL program.
"""
f = open(file, 'r')
str = "".join(f.readlines())
return cl.Program(context, str).build()
def clPath():
""" Gets the OpenCL kernels path
@return OpenCL kernels path
"""
path = Paths.modulePath() + "/OpenCL"
return path
def globalSize(n):
""" Compute global size from amount of data.
@param n Amount of data.
@return global size.
"""
localSize = 256
return int(math.ceil(n/localSize))

113
src/Mod/Ship/simRun/Sim/initialization.py Normal file
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@ -0,0 +1,113 @@
#***************************************************************************
#* *
#* Copyright (c) 2011, 2012 *
#* Jose Luis Cercos Pita <jlcercos@gmail.com> *
#* *
#* This program is free software; you can redistribute it and/or modify *
#* it under the terms of the GNU Lesser General Public License (LGPL) *
#* as published by the Free Software Foundation; either version 2 of *
#* the License, or (at your option) any later version. *
#* for detail see the LICENCE text file. *
#* *
#* This program is distributed in the hope that it will be useful, *
#* but WITHOUT ANY WARRANTY; without even the implied warranty of *
#* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
#* GNU Library General Public License for more details. *
#* *
#* You should have received a copy of the GNU Library General Public *
#* License along with this program; if not, write to the Free Software *
#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
#* USA *
#* *
#***************************************************************************
# Simulation stuff
from Utils import *
# pyOpenCL
import pyopencl as cl
import numpy as np
class perform:
def __init__(self, context, queue, FSmesh, waves):
""" Constructor, includes program loading.
@param context OpenCL context where apply.
@param queue OpenCL command queue.
@param FSmesh Initial free surface mesh.
@param waves Considered simulation waves (A,T,phi,heading).
"""
self.context = context
self.queue = queue
self.program = loadProgram(context, clPath() + "/simInit.cl")
self.loadData(FSmesh, waves)
self.execute()
def loadData(self, FSmesh, waves):
""" Convert data to numpy format, and create OpenCL
buffers.
@param FSmesh Initial free surface mesh.
@param waves Considered simulation waves (A,T,phi,heading).
"""
mf = cl.mem_flags
nx = len(FSmesh)
ny = len(FSmesh[0])
nW = len(waves)
# Mesh data
p = np.ndarray((nx*ny, 4), dtype=np.float32)
n = np.ndarray((nx*ny, 4), dtype=np.float32)
a = np.ndarray((nx*ny, 1), dtype=np.float32)
for i in range(0, nx):
for j in range(0, ny):
id = i*ny + j
pos = FSmesh[i][j].pos
normal = FSmesh[i][j].normal
area = FSmesh[i][j].area
p[id,0] = pos.x
p[id,1] = pos.y
p[id,2] = pos.z
p[id,3] = 1.
n[id,0] = normal.x
n[id,1] = normal.y
n[id,2] = normal.z
n[id,3] = 0.
a[id,0] = area
p_cl = cl.Buffer(self.context, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=p)
n_cl = cl.Buffer(self.context, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=n)
a_cl = cl.Buffer(self.context, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=a)
v_cl = cl.Buffer(self.context, mf.READ_WRITE, size = nx*ny*4 * np.dtype('float32').itemsize)
f_cl = cl.Buffer(self.context, mf.READ_WRITE, size = nx*ny*4 * np.dtype('float32').itemsize)
phi = cl.Buffer(self.context, mf.READ_WRITE, size = nx*ny * np.dtype('float32').itemsize)
Phi = cl.Buffer(self.context, mf.READ_WRITE, size = nx*ny * np.dtype('float32').itemsize)
self.fs = {'Nx':nx, 'Ny':ny, 'pos':p_cl, 'vel':v_cl, 'acc':f_cl, \
'normal':n_cl, 'area':a_cl, 'velPot':phi, 'accPot':Phi}
# Waves data
w = np.ndarray((nW, 4), dtype=np.float32)
for i in range(0,nW):
w[i,0] = waves[i][0]
w[i,1] = waves[i][1]
w[i,2] = waves[i][2]
w[i,3] = waves[i][3]
w_cl = cl.Buffer(self.context, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=w)
self.waves = {'N':nW, 'data':w_cl}
# Ensure that all data has been written
self.queue.finish()
def execute(self):
""" Compute initial conditions. """
# Global size computation
N = np.ndarray((2, 1), dtype=np.uint32)
N[0] = self.fs['Nx']
N[1] = self.fs['Ny']
n = np.uint32(self.waves['N'])
gSize = (globalSize(N[0]),globalSize(N[1]),)
# Kernel arguments
kernelargs = (self.fs['pos'],
self.fs['vel'],
self.fs['acc'],
self.waves['data'],
self.fs['velPot'],
self.fs['accPot'],
N, n)
# Kernel launch
self.program.FS(self.queue, gSize, None, *(kernelargs))
self.queue.finish()

117
src/Mod/Ship/simRun/Sim/initialization.py~ Normal file
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@ -0,0 +1,117 @@
#***************************************************************************
#* *
#* Copyright (c) 2011, 2012 *
#* Jose Luis Cercos Pita <jlcercos@gmail.com> *
#* *
#* This program is free software; you can redistribute it and/or modify *
#* it under the terms of the GNU Lesser General Public License (LGPL) *
#* as published by the Free Software Foundation; either version 2 of *
#* the License, or (at your option) any later version. *
#* for detail see the LICENCE text file. *
#* *
#* This program is distributed in the hope that it will be useful, *
#* but WITHOUT ANY WARRANTY; without even the implied warranty of *
#* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
#* GNU Library General Public License for more details. *
#* *
#* You should have received a copy of the GNU Library General Public *
#* License along with this program; if not, write to the Free Software *
#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
#* USA *
#* *
#***************************************************************************
# Simulation stuff
from Utils import *
# pyOpenCL
import pyopencl as cl
import numpy as np
class perform:
def __init__(self, context, queue, FSmesh, waves):
""" Constructor, includes program loading.
@param context OpenCL context where apply.
@param queue OpenCL command queue.
@param FSmesh Initial free surface mesh.
@param waves Considered simulation waves (A,T,phi,heading).
"""
self.context = context
self.queue = queue
self.program = loadProgram(context, clPath() + "/simInit.cl")
self.loadData(FSmesh, waves)
self.execute()
def loadData(self, FSmesh, waves):
""" Convert data to numpy format, and create OpenCL
buffers.
@param FSmesh Initial free surface mesh.
@param waves Considered simulation waves (A,T,phi,heading).
"""
mf = cl.mem_flags
nx = len(FSmesh)
ny = len(FSmesh[0])
nW = len(waves)
# Mesh data
p = np.ndarray((nx*ny, 4), dtype=np.float32)
n = np.ndarray((nx*ny, 4), dtype=np.float32)
a = np.ndarray((nx*ny, 1), dtype=np.float32)
for i in range(0, nx):
for j in range(0, ny):
id = i*ny + j
pos = FSmesh[i][j].pos
normal = FSmesh[i][j].normal
area = FSmesh[i][j].area
p[id,0] = pos.x
p[id,1] = pos.y
p[id,2] = pos.z
p[id,3] = 1.
n[id,0] = normal.x
n[id,1] = normal.y
n[id,2] = normal.z
n[id,3] = 0.
a[id,0] = area
p_cl = cl.Buffer(self.context, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=p)
n_cl = cl.Buffer(self.context, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=n)
a_cl = cl.Buffer(self.context, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=a)
v_cl = cl.Buffer(self.context, mf.READ_WRITE, size = nx*ny*4 * np.dtype('float32').itemsize)
f_cl = cl.Buffer(self.context, mf.READ_WRITE, size = nx*ny*4 * np.dtype('float32').itemsize)
phi = cl.Buffer(self.context, mf.READ_WRITE, size = nx*ny * np.dtype('float32').itemsize)
Phi = cl.Buffer(self.context, mf.READ_WRITE, size = nx*ny * np.dtype('float32').itemsize)
self.fs = {'Nx':nx, 'Ny':ny, 'pos':p_cl, 'vel':v_cl, 'acc':f_cl, \
'normal':n_cl, 'area':a_cl, 'velPot':phi, 'accPot':Phi}
# Waves data
w = np.ndarray((nW, 4), dtype=np.float32)
for i in range(0,nW):
w[i,0] = waves[i][0]
w[i,1] = waves[i][1]
w[i,2] = waves[i][2]
w[i,3] = waves[i][3]
w_cl = cl.Buffer(self.context, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=w)
self.waves = {'N':nW, 'data':w_cl}
# Ensure that all data has been written
self.queue.finish()
def execute(self):
""" Compute initial conditions. """
# Global size computation
N = np.ndarray((2, 1), dtype=np.uint32)
N[0] = self.fs['Nx']
N[1] = self.fs['Ny']
n = np.uint32(self.waves['N'])
gSize = (globalSize(N[0]),globalSize(N[1]),)
print(gSize)
# Kernel arguments
kernelargs = (self.fs['pos'],
self.fs['vel'],
self.fs['acc'],
self.waves['data'],
self.fs['velPot'],
self.fs['accPot'],
N, n)
print('Launching...')
# Kernel launch
self.program.FS(self.queue, gSize, None, *(kernelargs))
print('Waiting...')
self.queue.finish()
print('OK!')

8
src/Mod/Ship/simRun/Simulation.py
View File

@ -34,6 +34,9 @@ import FreeCAD,FreeCADGui
from FreeCAD import Base, Vector
import Part
# Simulation stuff
from Sim import initialization
# Ship design module
from shipUtils import Paths, Translator, Math
@ -75,6 +78,11 @@ class FreeCADShipSimulation(threading.Thread):
"""
self.active = True
# Perform work here
msg = Translator.translate("\t[Sim]: Initializating OpenCL...\n")
FreeCAD.Console.PrintMessage(msg)
init = initialization.perform(self.context,self.queue,self.FSmesh,self.waves)
msg = Translator.translate("\t[Sim]: Iterating (outputs will be noticed)...\n")
FreeCAD.Console.PrintMessage(msg)
while self.active:
print("Im thread, Im running...")
time.sleep(1)

107
src/Mod/Ship/simRun/Simulation.py~ Normal file
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@ -0,0 +1,107 @@
#***************************************************************************
#* *
#* Copyright (c) 2011, 2012 *
#* Jose Luis Cercos Pita <jlcercos@gmail.com> *
#* *
#* This program is free software; you can redistribute it and/or modify *
#* it under the terms of the GNU Lesser General Public License (LGPL) *
#* as published by the Free Software Foundation; either version 2 of *
#* the License, or (at your option) any later version. *
#* for detail see the LICENCE text file. *
#* *
#* This program is distributed in the hope that it will be useful, *
#* but WITHOUT ANY WARRANTY; without even the implied warranty of *
#* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
#* GNU Library General Public License for more details. *
#* *
#* You should have received a copy of the GNU Library General Public *
#* License along with this program; if not, write to the Free Software *
#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
#* USA *
#* *
#***************************************************************************
import time
from math import *
import threading
# pyOpenCL
import pyopencl as cl
import numpy as np
# FreeCAD
import FreeCAD,FreeCADGui
from FreeCAD import Base, Vector
import Part
# Simulation stuff
from Sim import initialization
# Ship design module
from shipUtils import Paths, Translator, Math
class Singleton(type):
def __init__(cls, name, bases, dct):
cls.__instance = None
type.__init__(cls, name, bases, dct)
def __call__(cls, *args, **kw):
if cls.__instance is None:
cls.__instance = type.__call__(cls, *args,**kw)
return cls.__instance
class FreeCADShipSimulation(threading.Thread):
__metaclass__ = Singleton
def __init__ (self, device, endTime, output, FSmesh, waves):
""" Thread constructor.
@param device Device to use.
@param endTime Maximum simulation time.
@param output [Rate,Type] Output rate, Type=0 if FPS, 1 if IPF.
@param FSmesh Free surface mesh faces.
@param waves Waves parameters (A,T,phi,heading)
"""
threading.Thread.__init__(self)
# Setup as stopped
self.active = False
# Build OpenCL context and command queue
self.device = device
self.context = cl.Context(devices=[self.device])
self.queue = cl.CommandQueue(self.context)
# Storage data
self.endTime = endTime
self.output = output
self.FSmesh = FSmesh
self.waves = waves
def run(self):
""" Runs the simulation.
"""
self.active = True
# Perform work here
msg = Translator.translate("\t[Sim]: Initializating OpenCL...\n")
FreeCAD.Console.PrintMessage(msg)
init = initialization.perform(self.context,self.queue,self.FSmesh,self.waves)
msg = Translator.translate("\t[Sim]: Iterating (outputs will be noticed)...\n")
FreeCAD.Console.PrintMessage(msg)
while self.active:
print("Im thread, Im running...")
time.sleep(1)
# ...
print("Im thread, step done!")
msg = Translator.translate("\t[Sim]: Output performed!\n")
FreeCAD.Console.PrintMessage(msg)
# Set thread as stopped (and prepare it to restarting)
self.active = False
threading.Event().set()
threading.Thread.__init__(self)
def stop(self):
""" Call to stop execution.
"""
self.active = False
def isRunning(self):
""" Report thread state
@return True if thread is running, False otherwise.
"""
return self.active