The Tor Browser / file comparison
comparison: gfx/gl/GLLibraryLoader.cpp
gfx/gl/GLLibraryLoader.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
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| -1:000000000000 | 0:d71933c0c36f |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 3 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include "GLLibraryLoader.h" | |
| 6 | |
| 7 #include "nsDebug.h" | |
| 8 | |
| 9 namespace mozilla { | |
| 10 namespace gl { | |
| 11 | |
| 12 bool | |
| 13 GLLibraryLoader::OpenLibrary(const char *library) | |
| 14 { | |
| 15 PRLibSpec lspec; | |
| 16 lspec.type = PR_LibSpec_Pathname; | |
| 17 lspec.value.pathname = library; | |
| 18 | |
| 19 mLibrary = PR_LoadLibraryWithFlags(lspec, PR_LD_LAZY | PR_LD_LOCAL); | |
| 20 if (!mLibrary) | |
| 21 return false; | |
| 22 | |
| 23 return true; | |
| 24 } | |
| 25 | |
| 26 bool | |
| 27 GLLibraryLoader::LoadSymbols(SymLoadStruct *firstStruct, | |
| 28 bool tryplatform, | |
| 29 const char *prefix, | |
| 30 bool warnOnFailure) | |
| 31 { | |
| 32 return LoadSymbols(mLibrary, | |
| 33 firstStruct, | |
| 34 tryplatform ? mLookupFunc : nullptr, | |
| 35 prefix, | |
| 36 warnOnFailure); | |
| 37 } | |
| 38 | |
| 39 PRFuncPtr | |
| 40 GLLibraryLoader::LookupSymbol(PRLibrary *lib, | |
| 41 const char *sym, | |
| 42 PlatformLookupFunction lookupFunction) | |
| 43 { | |
| 44 PRFuncPtr res = 0; | |
| 45 | |
| 46 // try finding it in the library directly, if we have one | |
| 47 if (lib) { | |
| 48 res = PR_FindFunctionSymbol(lib, sym); | |
| 49 } | |
| 50 | |
| 51 // then try looking it up via the lookup symbol | |
| 52 if (!res && lookupFunction) { | |
| 53 res = lookupFunction(sym); | |
| 54 } | |
| 55 | |
| 56 // finally just try finding it in the process | |
| 57 if (!res) { | |
| 58 PRLibrary *leakedLibRef; | |
| 59 res = PR_FindFunctionSymbolAndLibrary(sym, &leakedLibRef); | |
| 60 } | |
| 61 | |
| 62 return res; | |
| 63 } | |
| 64 | |
| 65 bool | |
| 66 GLLibraryLoader::LoadSymbols(PRLibrary *lib, | |
| 67 SymLoadStruct *firstStruct, | |
| 68 PlatformLookupFunction lookupFunction, | |
| 69 const char *prefix, | |
| 70 bool warnOnFailure) | |
| 71 { | |
| 72 char sbuf[MAX_SYMBOL_LENGTH * 2]; | |
| 73 int failCount = 0; | |
| 74 | |
| 75 SymLoadStruct *ss = firstStruct; | |
| 76 while (ss->symPointer) { | |
| 77 *ss->symPointer = 0; | |
| 78 | |
| 79 for (int i = 0; i < MAX_SYMBOL_NAMES; i++) { | |
| 80 if (ss->symNames[i] == nullptr) | |
| 81 break; | |
| 82 | |
| 83 const char *s = ss->symNames[i]; | |
| 84 if (prefix && *prefix != 0) { | |
| 85 strcpy(sbuf, prefix); | |
| 86 strcat(sbuf, ss->symNames[i]); | |
| 87 s = sbuf; | |
| 88 } | |
| 89 | |
| 90 PRFuncPtr p = LookupSymbol(lib, s, lookupFunction); | |
| 91 if (p) { | |
| 92 *ss->symPointer = p; | |
| 93 break; | |
| 94 } | |
| 95 } | |
| 96 | |
| 97 if (*ss->symPointer == 0) { | |
| 98 if (warnOnFailure) | |
| 99 printf_stderr("Can't find symbol '%s'.\n", ss->symNames[0]); | |
| 100 | |
| 101 failCount++; | |
| 102 } | |
| 103 | |
| 104 ss++; | |
| 105 } | |
| 106 | |
| 107 return failCount == 0 ? true : false; | |
| 108 } | |
| 109 | |
| 110 } /* namespace gl */ | |
| 111 } /* namespace mozilla */ | |
| 112 |
