зеркало из https://github.com/mozilla/gecko-dev.git
114 строки
2.8 KiB
C++
114 строки
2.8 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "GLLibraryLoader.h"
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#include "nsDebug.h"
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namespace mozilla {
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namespace gl {
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bool
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GLLibraryLoader::OpenLibrary(const char *library)
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{
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PRLibSpec lspec;
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lspec.type = PR_LibSpec_Pathname;
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lspec.value.pathname = library;
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mLibrary = PR_LoadLibraryWithFlags(lspec, PR_LD_LAZY | PR_LD_LOCAL);
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if (!mLibrary)
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return false;
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return true;
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}
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bool
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GLLibraryLoader::LoadSymbols(const SymLoadStruct *firstStruct,
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bool tryplatform,
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const char *prefix,
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bool warnOnFailure)
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{
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return LoadSymbols(mLibrary,
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firstStruct,
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tryplatform ? mLookupFunc : nullptr,
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prefix,
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warnOnFailure);
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}
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PRFuncPtr
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GLLibraryLoader::LookupSymbol(PRLibrary *lib,
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const char *sym,
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PlatformLookupFunction lookupFunction)
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{
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PRFuncPtr res = 0;
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// try finding it in the library directly, if we have one
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if (lib) {
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res = PR_FindFunctionSymbol(lib, sym);
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}
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// then try looking it up via the lookup symbol
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if (!res && lookupFunction) {
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res = lookupFunction(sym);
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}
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// finally just try finding it in the process
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if (!res) {
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PRLibrary *leakedLibRef;
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res = PR_FindFunctionSymbolAndLibrary(sym, &leakedLibRef);
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}
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return res;
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}
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bool
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GLLibraryLoader::LoadSymbols(PRLibrary *lib,
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const SymLoadStruct *firstStruct,
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PlatformLookupFunction lookupFunction,
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const char *prefix,
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bool warnOnFailure)
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{
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char sbuf[MAX_SYMBOL_LENGTH * 2];
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int failCount = 0;
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const SymLoadStruct *ss = firstStruct;
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while (ss->symPointer) {
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*ss->symPointer = 0;
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for (int i = 0; i < MAX_SYMBOL_NAMES; i++) {
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if (ss->symNames[i] == nullptr)
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break;
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const char *s = ss->symNames[i];
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if (prefix && *prefix != 0) {
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strcpy(sbuf, prefix);
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strcat(sbuf, ss->symNames[i]);
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s = sbuf;
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}
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PRFuncPtr p = LookupSymbol(lib, s, lookupFunction);
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if (p) {
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*ss->symPointer = p;
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break;
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}
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}
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if (*ss->symPointer == 0) {
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if (warnOnFailure) {
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printf_stderr("Can't find symbol '%s'.\n", ss->symNames[0]);
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}
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failCount++;
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}
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ss++;
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}
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return failCount == 0 ? true : false;
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}
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} /* namespace gl */
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} /* namespace mozilla */
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