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annotate src/impl/hoofbaby/util/sharedlib.d @ 0:3425707ddbf6

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Initial import (hopefully this mercurial stuff works...)
author fraserofthenight
date Mon, 06 Jul 2009 08:06:28 -0700
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1 /**
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2 * Hoofbaby -- http://www.dsource.org/projects/hoofbaby
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3 * Copyright (C) 2009 Robert Fraser
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4 *
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5 * This program is free software; you can redistribute it andor
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6 * modify it under the terms of the GNU General Public License
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7 * as published by the Free Software Foundation; either version 2
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8 * of the License, or (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 */
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15
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16 module hoofbaby.util.sharedlib;
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17
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18 public import tango.sys.SharedLib;
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19
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20 version(Windows) private const char[] SHARED_LIB_EXT = ".dll";
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21 else version(Posix) private const char[] SHARED_LIB_EXT = ".so";
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22 else static assert(false);
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23
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24 private char[] stripUnderscore(char[] name)
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25 {
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26 if(name.length && name[0] == '_')
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27 return name[1 .. $];
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28 return name;
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29 }
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30
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31 public char[] shared_mixin(char[] libFile, char[][] functions)
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32 {
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33 assert(functions.length % 2 == 0);
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34 char[] r = "private SharedLib _lib;";
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35 int numFuncs = functions.length / 2;
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36 for(int i = 0; i < numFuncs; i++)
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37 {
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38 char[] type = functions[i * 2];
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39 char[] name = stripUnderscore(functions[i * 2 + 1]);
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40 if(!name.length || !type.length)
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41 continue;
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42 r ~= "public static " ~ type ~ " " ~ name ~ ";";
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43 }
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44 r ~= "public void _loadLib() {if(_lib)return; scope(failure){_unloadLib();}";
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45 r ~= "_lib = SharedLib.load(\"" ~ libFile ~ SHARED_LIB_EXT ~ "\");";
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46 for(int i = 0; i < numFuncs; i++)
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47 {
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48 char[] nameu = functions[i * 2 + 1];
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49 char[] name = stripUnderscore(nameu);
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50 if(!name.length)
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51 continue;
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52 r ~= name ~ " = " ~ "cast(typeof(" ~ name ~ ")) _lib.getSymbol(\"" ~ nameu ~ "\");";
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53 }
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54 r ~= "}";
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55 r ~= "public void _unloadLib() { if(_lib){_lib.unload();}_lib=null;";
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56 for(int i = 0; i < numFuncs; i++)
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57 {
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58 char[] name = stripUnderscore(functions[i * 2 + 1]);
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59 if(!name.length)
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60 continue;
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61 r ~= name ~ "=null;";
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62 }
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63 r ~= "}";
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64 return r;
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65 }