1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/gl/GLLibraryLoader.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,112 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#include "GLLibraryLoader.h"
1.9 +
1.10 +#include "nsDebug.h"
1.11 +
1.12 +namespace mozilla {
1.13 +namespace gl {
1.14 +
1.15 +bool
1.16 +GLLibraryLoader::OpenLibrary(const char *library)
1.17 +{
1.18 + PRLibSpec lspec;
1.19 + lspec.type = PR_LibSpec_Pathname;
1.20 + lspec.value.pathname = library;
1.21 +
1.22 + mLibrary = PR_LoadLibraryWithFlags(lspec, PR_LD_LAZY | PR_LD_LOCAL);
1.23 + if (!mLibrary)
1.24 + return false;
1.25 +
1.26 + return true;
1.27 +}
1.28 +
1.29 +bool
1.30 +GLLibraryLoader::LoadSymbols(SymLoadStruct *firstStruct,
1.31 + bool tryplatform,
1.32 + const char *prefix,
1.33 + bool warnOnFailure)
1.34 +{
1.35 + return LoadSymbols(mLibrary,
1.36 + firstStruct,
1.37 + tryplatform ? mLookupFunc : nullptr,
1.38 + prefix,
1.39 + warnOnFailure);
1.40 +}
1.41 +
1.42 +PRFuncPtr
1.43 +GLLibraryLoader::LookupSymbol(PRLibrary *lib,
1.44 + const char *sym,
1.45 + PlatformLookupFunction lookupFunction)
1.46 +{
1.47 + PRFuncPtr res = 0;
1.48 +
1.49 + // try finding it in the library directly, if we have one
1.50 + if (lib) {
1.51 + res = PR_FindFunctionSymbol(lib, sym);
1.52 + }
1.53 +
1.54 + // then try looking it up via the lookup symbol
1.55 + if (!res && lookupFunction) {
1.56 + res = lookupFunction(sym);
1.57 + }
1.58 +
1.59 + // finally just try finding it in the process
1.60 + if (!res) {
1.61 + PRLibrary *leakedLibRef;
1.62 + res = PR_FindFunctionSymbolAndLibrary(sym, &leakedLibRef);
1.63 + }
1.64 +
1.65 + return res;
1.66 +}
1.67 +
1.68 +bool
1.69 +GLLibraryLoader::LoadSymbols(PRLibrary *lib,
1.70 + SymLoadStruct *firstStruct,
1.71 + PlatformLookupFunction lookupFunction,
1.72 + const char *prefix,
1.73 + bool warnOnFailure)
1.74 +{
1.75 + char sbuf[MAX_SYMBOL_LENGTH * 2];
1.76 + int failCount = 0;
1.77 +
1.78 + SymLoadStruct *ss = firstStruct;
1.79 + while (ss->symPointer) {
1.80 + *ss->symPointer = 0;
1.81 +
1.82 + for (int i = 0; i < MAX_SYMBOL_NAMES; i++) {
1.83 + if (ss->symNames[i] == nullptr)
1.84 + break;
1.85 +
1.86 + const char *s = ss->symNames[i];
1.87 + if (prefix && *prefix != 0) {
1.88 + strcpy(sbuf, prefix);
1.89 + strcat(sbuf, ss->symNames[i]);
1.90 + s = sbuf;
1.91 + }
1.92 +
1.93 + PRFuncPtr p = LookupSymbol(lib, s, lookupFunction);
1.94 + if (p) {
1.95 + *ss->symPointer = p;
1.96 + break;
1.97 + }
1.98 + }
1.99 +
1.100 + if (*ss->symPointer == 0) {
1.101 + if (warnOnFailure)
1.102 + printf_stderr("Can't find symbol '%s'.\n", ss->symNames[0]);
1.103 +
1.104 + failCount++;
1.105 + }
1.106 +
1.107 + ss++;
1.108 + }
1.109 +
1.110 + return failCount == 0 ? true : false;
1.111 +}
1.112 +
1.113 +} /* namespace gl */
1.114 +} /* namespace mozilla */
1.115 +
