1 | r""" |
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2 | DLL driver for C kernels |
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3 | |
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4 | If the environment variable *SAS_OPENMP* is set, then sasmodels |
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5 | will attempt to compile with OpenMP flags so that the model can use all |
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6 | available kernels. This may or may not be available on your compiler |
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7 | toolchain. Depending on operating system and environment. |
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8 | |
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9 | Windows does not have provide a compiler with the operating system. |
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10 | Instead, we assume that TinyCC is installed and available. This can |
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11 | be done with a simple pip command if it is not already available:: |
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12 | |
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13 | pip install tinycc |
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14 | |
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15 | If Microsoft Visual C++ is available (because VCINSTALLDIR is |
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16 | defined in the environment), then that will be used instead. |
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17 | Microsoft Visual C++ for Python is available from Microsoft: |
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18 | |
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19 | `<http://www.microsoft.com/en-us/download/details.aspx?id=44266>`_ |
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20 | |
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21 | If neither compiler is available, sasmodels will check for *MinGW*, |
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22 | the GNU compiler toolchain. This available in packages such as Anaconda |
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23 | and PythonXY, or available stand alone. This toolchain has had |
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24 | difficulties on some systems, and may or may not work for you. |
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25 | |
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26 | You can control which compiler to use by setting SAS_COMPILER in the |
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27 | environment: |
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28 | |
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29 | - tinycc (Windows): use the TinyCC compiler shipped with SasView |
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30 | - msvc (Windows): use the Microsoft Visual C++ compiler |
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31 | - mingw (Windows): use the MinGW GNU cc compiler |
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32 | - unix (Linux): use the system cc compiler. |
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33 | - unix (Mac): use the clang compiler. You will need XCode installed, and |
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34 | the XCode command line tools. Mac comes with OpenCL drivers, so generally |
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35 | this will not be needed. |
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36 | |
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37 | Both *msvc* and *mingw* require that the compiler is available on your path. |
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38 | For *msvc*, this can done by running vcvarsall.bat in a windows terminal. |
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39 | Install locations are system dependent, such as: |
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40 | |
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41 | C:\Program Files (x86)\Common Files\Microsoft\Visual C++ for Python\9.0\vcvarsall.bat |
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42 | |
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43 | or maybe |
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44 | |
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45 | C:\Users\yourname\AppData\Local\Programs\Common\Microsoft\Visual C++ for Python\9.0\vcvarsall.bat |
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46 | |
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47 | OpenMP for *msvc* requires the Microsoft vcomp90.dll library, which doesn't |
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48 | seem to be included with the compiler, nor does there appear to be a public |
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49 | download location. There may be one on your machine already in a location |
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50 | such as: |
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51 | |
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52 | C:\Windows\winsxs\x86_microsoft.vc90.openmp*\vcomp90.dll |
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53 | |
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54 | If you copy this to somewhere on your path, such as the python directory or |
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55 | the install directory for this application, then OpenMP should be supported. |
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56 | |
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57 | For full control of the compiler, define a function |
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58 | *compile_command(source,output)* which takes the name of the source file |
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59 | and the name of the output file and returns a compile command that can be |
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60 | evaluated in the shell. For even more control, replace the entire |
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61 | *compile(source,output)* function. |
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62 | |
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63 | The global attribute *ALLOW_SINGLE_PRECISION_DLLS* should be set to *False* if |
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64 | you wish to prevent single precision floating point evaluation for the compiled |
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65 | models, otherwise set it defaults to *True*. |
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66 | """ |
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67 | from __future__ import print_function |
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68 | |
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69 | import sys |
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70 | import os |
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71 | from os.path import join as joinpath, splitext |
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72 | import subprocess |
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73 | import tempfile |
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74 | import ctypes as ct # type: ignore |
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75 | import _ctypes as _ct |
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76 | import logging |
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77 | |
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78 | import numpy as np # type: ignore |
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79 | |
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80 | try: |
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81 | import tinycc |
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82 | except ImportError: |
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83 | tinycc = None |
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84 | |
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85 | from . import generate |
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86 | from .kernel import KernelModel, Kernel |
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87 | from .kernelpy import PyInput |
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88 | from .exception import annotate_exception |
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89 | from .generate import F16, F32, F64 |
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90 | |
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91 | try: |
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92 | from typing import Tuple, Callable, Any |
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93 | from .modelinfo import ModelInfo |
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94 | from .details import CallDetails |
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95 | except ImportError: |
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96 | pass |
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97 | |
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98 | if "SAS_COMPILER" in os.environ: |
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99 | compiler = os.environ["SAS_COMPILER"] |
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100 | elif os.name == 'nt': |
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101 | # If vcvarsall.bat has been called, then VCINSTALLDIR is in the environment |
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102 | # and we can use the MSVC compiler. Otherwise, if tinycc is available |
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103 | # the use it. Otherwise, hope that mingw is available. |
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104 | if "VCINSTALLDIR" in os.environ: |
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105 | compiler = "msvc" |
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106 | elif tinycc: |
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107 | compiler = "tinycc" |
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108 | else: |
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109 | compiler = "mingw" |
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110 | else: |
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111 | compiler = "unix" |
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112 | |
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113 | ARCH = "" if ct.sizeof(ct.c_void_p) > 4 else "x86" # 4 byte pointers on x86 |
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114 | if compiler == "unix": |
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115 | # Generic unix compile |
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116 | # On mac users will need the X code command line tools installed |
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117 | #COMPILE = "gcc-mp-4.7 -shared -fPIC -std=c99 -fopenmp -O2 -Wall %s -o %s -lm -lgomp" |
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118 | CC = "cc -shared -fPIC -std=c99 -O2 -Wall".split() |
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119 | # add openmp support if not running on a mac |
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120 | if sys.platform != "darwin": |
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121 | CC.append("-fopenmp") |
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122 | def compile_command(source, output): |
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123 | """unix compiler command""" |
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124 | return CC + [source, "-o", output, "-lm"] |
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125 | elif compiler == "msvc": |
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126 | # Call vcvarsall.bat before compiling to set path, headers, libs, etc. |
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127 | # MSVC compiler is available, so use it. OpenMP requires a copy of |
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128 | # vcomp90.dll on the path. One may be found here: |
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129 | # C:/Windows/winsxs/x86_microsoft.vc90.openmp*/vcomp90.dll |
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130 | # Copy this to the python directory and uncomment the OpenMP COMPILE |
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131 | # TODO: remove intermediate OBJ file created in the directory |
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132 | # TODO: maybe don't use randomized name for the c file |
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133 | # TODO: maybe ask distutils to find MSVC |
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134 | CC = "cl /nologo /Ox /MD /W3 /GS- /DNDEBUG".split() |
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135 | if "SAS_OPENMP" in os.environ: |
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136 | CC.append("/openmp") |
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137 | LN = "/link /DLL /INCREMENTAL:NO /MANIFEST".split() |
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138 | def compile_command(source, output): |
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139 | """MSVC compiler command""" |
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140 | return CC + ["/Tp%s"%source] + LN + ["/OUT:%s"%output] |
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141 | elif compiler == "tinycc": |
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142 | # TinyCC compiler. |
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143 | CC = [tinycc.TCC] + "-shared -rdynamic -Wall".split() |
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144 | def compile_command(source, output): |
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145 | """tinycc compiler command""" |
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146 | return CC + [source, "-o", output] |
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147 | elif compiler == "mingw": |
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148 | # MinGW compiler. |
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149 | CC = "gcc -shared -std=c99 -O2 -Wall".split() |
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150 | if "SAS_OPENMP" in os.environ: |
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151 | CC.append("-fopenmp") |
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152 | def compile_command(source, output): |
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153 | """mingw compiler command""" |
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154 | return CC + [source, "-o", output, "-lm"] |
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155 | |
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156 | # Windows-specific solution |
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157 | if os.name == 'nt': |
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158 | # Assume the default location of module DLLs is in .sasmodels/compiled_models. |
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159 | DLL_PATH = os.path.join(os.path.expanduser("~"), ".sasmodels", "compiled_models") |
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160 | if not os.path.exists(DLL_PATH): |
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161 | os.makedirs(DLL_PATH) |
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162 | else: |
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163 | # Set up the default path for compiled modules. |
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164 | DLL_PATH = tempfile.gettempdir() |
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165 | |
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166 | ALLOW_SINGLE_PRECISION_DLLS = True |
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167 | |
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168 | def compile(source, output): |
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169 | # type: (str, str) -> None |
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170 | """ |
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171 | Compile *source* producing *output*. |
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172 | |
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173 | Raises RuntimeError if the compile failed or the output wasn't produced. |
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174 | """ |
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175 | command = compile_command(source=source, output=output) |
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176 | command_str = " ".join('"%s"'%p if ' ' in p else p for p in command) |
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177 | logging.info(command_str) |
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178 | try: |
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179 | # need shell=True on windows to keep console box from popping up |
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180 | shell = (os.name == 'nt') |
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181 | subprocess.check_output(command, shell=shell, stderr=subprocess.STDOUT) |
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182 | except subprocess.CalledProcessError as exc: |
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183 | raise RuntimeError("compile failed.\n%s\n%s"%(command_str, exc.output)) |
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184 | if not os.path.exists(output): |
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185 | raise RuntimeError("compile failed. File is in %r"%source) |
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186 | |
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187 | def dll_name(model_info, dtype): |
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188 | # type: (ModelInfo, np.dtype) -> str |
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189 | """ |
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190 | Name of the dll containing the model. This is the base file name without |
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191 | any path or extension, with a form such as 'sas_sphere32'. |
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192 | """ |
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193 | bits = 8*dtype.itemsize |
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194 | basename = "sas%d_%s"%(bits, model_info.id) |
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195 | basename += ARCH + ".so" |
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196 | |
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197 | # Hack to find precompiled dlls |
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198 | path = joinpath(generate.DATA_PATH, '..', 'compiled_models', basename) |
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199 | if os.path.exists(path): |
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200 | return path |
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201 | |
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202 | return joinpath(DLL_PATH, basename) |
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203 | |
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204 | |
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205 | def dll_path(model_info, dtype): |
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206 | # type: (ModelInfo, np.dtype) -> str |
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207 | """ |
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208 | Complete path to the dll for the model. Note that the dll may not |
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209 | exist yet if it hasn't been compiled. |
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210 | """ |
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211 | return os.path.join(DLL_PATH, dll_name(model_info, dtype)) |
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212 | |
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213 | |
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214 | def make_dll(source, model_info, dtype=F64): |
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215 | # type: (str, ModelInfo, np.dtype) -> str |
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216 | """ |
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217 | Returns the path to the compiled model defined by *kernel_module*. |
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218 | |
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219 | If the model has not been compiled, or if the source file(s) are newer |
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220 | than the dll, then *make_dll* will compile the model before returning. |
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221 | This routine does not load the resulting dll. |
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222 | |
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223 | *dtype* is a numpy floating point precision specifier indicating whether |
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224 | the model should be single, double or long double precision. The default |
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225 | is double precision, *np.dtype('d')*. |
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226 | |
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227 | Set *sasmodels.ALLOW_SINGLE_PRECISION_DLLS* to False if single precision |
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228 | models are not allowed as DLLs. |
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229 | |
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230 | Set *sasmodels.kerneldll.DLL_PATH* to the compiled dll output path. |
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231 | The default is the system temporary directory. |
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232 | """ |
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233 | if dtype == F16: |
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234 | raise ValueError("16 bit floats not supported") |
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235 | if dtype == F32 and not ALLOW_SINGLE_PRECISION_DLLS: |
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236 | dtype = F64 # Force 64-bit dll |
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237 | # Note: dtype may be F128 for long double precision |
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238 | |
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239 | dll = dll_path(model_info, dtype) |
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240 | |
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241 | if not os.path.exists(dll): |
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242 | need_recompile = True |
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243 | else: |
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244 | dll_time = os.path.getmtime(dll) |
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245 | newest_source = generate.dll_timestamp(model_info) |
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246 | need_recompile = dll_time < newest_source |
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247 | if need_recompile: |
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248 | basename = splitext(os.path.basename(dll))[0] + "_" |
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249 | system_fd, filename = tempfile.mkstemp(suffix=".c", prefix=basename) |
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250 | source = generate.convert_type(source, dtype) |
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251 | with os.fdopen(system_fd, "w") as file_handle: |
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252 | file_handle.write(source) |
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253 | compile(source=filename, output=dll) |
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254 | # comment the following to keep the generated c file |
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255 | # Note: if there is a syntax error then compile raises an error |
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256 | # and the source file will not be deleted. |
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257 | os.unlink(filename) |
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258 | #print("saving compiled file in %r"%filename) |
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259 | return dll |
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260 | |
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261 | |
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262 | def load_dll(source, model_info, dtype=F64): |
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263 | # type: (str, ModelInfo, np.dtype) -> "DllModel" |
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264 | """ |
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265 | Create and load a dll corresponding to the source, info pair returned |
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266 | from :func:`sasmodels.generate.make` compiled for the target precision. |
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267 | |
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268 | See :func:`make_dll` for details on controlling the dll path and the |
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269 | allowed floating point precision. |
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270 | """ |
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271 | filename = make_dll(source, model_info, dtype=dtype) |
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272 | return DllModel(filename, model_info, dtype=dtype) |
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273 | |
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274 | |
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275 | class DllModel(KernelModel): |
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276 | """ |
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277 | ctypes wrapper for a single model. |
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278 | |
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279 | *source* and *model_info* are the model source and interface as returned |
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280 | from :func:`gen.make`. |
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281 | |
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282 | *dtype* is the desired model precision. Any numpy dtype for single |
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283 | or double precision floats will do, such as 'f', 'float32' or 'single' |
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284 | for single and 'd', 'float64' or 'double' for double. Double precision |
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285 | is an optional extension which may not be available on all devices. |
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286 | |
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287 | Call :meth:`release` when done with the kernel. |
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288 | """ |
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289 | def __init__(self, dllpath, model_info, dtype=generate.F32): |
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290 | # type: (str, ModelInfo, np.dtype) -> None |
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291 | self.info = model_info |
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292 | self.dllpath = dllpath |
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293 | self._dll = None # type: ct.CDLL |
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294 | self._kernels = None # type: List[Callable, Callable] |
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295 | self.dtype = np.dtype(dtype) |
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296 | |
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297 | def _load_dll(self): |
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298 | # type: () -> None |
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299 | try: |
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300 | self._dll = ct.CDLL(self.dllpath) |
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301 | except: |
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302 | annotate_exception("while loading "+self.dllpath) |
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303 | raise |
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304 | |
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305 | float_type = (ct.c_float if self.dtype == generate.F32 |
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306 | else ct.c_double if self.dtype == generate.F64 |
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307 | else ct.c_longdouble) |
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308 | |
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309 | # int, int, int, int*, double*, double*, double*, double*, double |
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310 | argtypes = [ct.c_int32]*3 + [ct.c_void_p]*4 + [float_type] |
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311 | names = [generate.kernel_name(self.info, variant) |
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312 | for variant in ("Iq", "Iqxy", "Imagnetic")] |
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313 | self._kernels = [self._dll[name] for name in names] |
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314 | for k in self._kernels: |
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315 | k.argtypes = argtypes |
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316 | |
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317 | def __getstate__(self): |
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318 | # type: () -> Tuple[ModelInfo, str] |
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319 | return self.info, self.dllpath |
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320 | |
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321 | def __setstate__(self, state): |
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322 | # type: (Tuple[ModelInfo, str]) -> None |
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323 | self.info, self.dllpath = state |
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324 | self._dll = None |
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325 | |
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326 | def make_kernel(self, q_vectors): |
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327 | # type: (List[np.ndarray]) -> DllKernel |
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328 | q_input = PyInput(q_vectors, self.dtype) |
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329 | # Note: pickle not supported for DllKernel |
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330 | if self._dll is None: |
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331 | self._load_dll() |
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332 | is_2d = len(q_vectors) == 2 |
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333 | kernel = self._kernels[1:3] if is_2d else [self._kernels[0]]*2 |
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334 | return DllKernel(kernel, self.info, q_input) |
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335 | |
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336 | def release(self): |
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337 | # type: () -> None |
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338 | """ |
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339 | Release any resources associated with the model. |
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340 | """ |
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341 | dll_handle = self._dll._handle |
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342 | if os.name == 'nt': |
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343 | ct.windll.kernel32.FreeLibrary(dll_handle) |
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344 | else: |
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345 | _ct.dlclose(dll_handle) |
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346 | del self._dll |
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347 | self._dll = None |
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348 | |
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349 | class DllKernel(Kernel): |
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350 | """ |
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351 | Callable SAS kernel. |
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352 | |
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353 | *kernel* is the c function to call. |
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354 | |
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355 | *model_info* is the module information |
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356 | |
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357 | *q_input* is the DllInput q vectors at which the kernel should be |
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358 | evaluated. |
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359 | |
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360 | The resulting call method takes the *pars*, a list of values for |
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361 | the fixed parameters to the kernel, and *pd_pars*, a list of (value, weight) |
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362 | vectors for the polydisperse parameters. *cutoff* determines the |
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363 | integration limits: any points with combined weight less than *cutoff* |
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364 | will not be calculated. |
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365 | |
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366 | Call :meth:`release` when done with the kernel instance. |
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367 | """ |
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368 | def __init__(self, kernel, model_info, q_input): |
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369 | # type: (Callable[[], np.ndarray], ModelInfo, PyInput) -> None |
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370 | self.kernel = kernel |
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371 | self.info = model_info |
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372 | self.q_input = q_input |
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373 | self.dtype = q_input.dtype |
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374 | self.dim = '2d' if q_input.is_2d else '1d' |
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375 | self.result = np.empty(q_input.nq+1, q_input.dtype) |
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376 | self.real = (np.float32 if self.q_input.dtype == generate.F32 |
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377 | else np.float64 if self.q_input.dtype == generate.F64 |
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378 | else np.float128) |
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379 | |
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380 | def __call__(self, call_details, values, cutoff, magnetic): |
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381 | # type: (CallDetails, np.ndarray, np.ndarray, float, bool) -> np.ndarray |
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382 | |
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383 | kernel = self.kernel[1 if magnetic else 0] |
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384 | args = [ |
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385 | self.q_input.nq, # nq |
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386 | None, # pd_start |
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387 | None, # pd_stop pd_stride[MAX_PD] |
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388 | call_details.buffer.ctypes.data, # problem |
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389 | values.ctypes.data, #pars |
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390 | self.q_input.q.ctypes.data, #q |
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391 | self.result.ctypes.data, # results |
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392 | self.real(cutoff), # cutoff |
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393 | ] |
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394 | #print("Calling DLL") |
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395 | #call_details.show(values) |
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396 | step = 100 |
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397 | for start in range(0, call_details.num_eval, step): |
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398 | stop = min(start + step, call_details.num_eval) |
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399 | args[1:3] = [start, stop] |
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400 | kernel(*args) # type: ignore |
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401 | |
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402 | #print("returned",self.q_input.q, self.result) |
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403 | pd_norm = self.result[self.q_input.nq] |
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404 | scale = values[0]/(pd_norm if pd_norm != 0.0 else 1.0) |
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405 | background = values[1] |
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406 | #print("scale",scale,background) |
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407 | return scale*self.result[:self.q_input.nq] + background |
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408 | |
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409 | def release(self): |
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410 | # type: () -> None |
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411 | """ |
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412 | Release any resources associated with the kernel. |
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413 | """ |
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414 | self.q_input.release() |
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