summaryrefslogtreecommitdiffstats
path: root/gfx/gl/GLLibraryLoader.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'gfx/gl/GLLibraryLoader.cpp')
-rw-r--r--gfx/gl/GLLibraryLoader.cpp117
1 files changed, 117 insertions, 0 deletions
diff --git a/gfx/gl/GLLibraryLoader.cpp b/gfx/gl/GLLibraryLoader.cpp
new file mode 100644
index 000000000..801ffe37c
--- /dev/null
+++ b/gfx/gl/GLLibraryLoader.cpp
@@ -0,0 +1,117 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "GLLibraryLoader.h"
+
+#include "nsDebug.h"
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+namespace mozilla {
+namespace gl {
+
+bool
+GLLibraryLoader::OpenLibrary(const char* library)
+{
+ PRLibSpec lspec;
+ lspec.type = PR_LibSpec_Pathname;
+ lspec.value.pathname = library;
+
+ mLibrary = PR_LoadLibraryWithFlags(lspec, PR_LD_LAZY | PR_LD_LOCAL);
+ if (!mLibrary)
+ return false;
+
+ return true;
+}
+
+bool
+GLLibraryLoader::LoadSymbols(const SymLoadStruct* firstStruct,
+ bool tryplatform,
+ const char* prefix,
+ bool warnOnFailure)
+{
+ return LoadSymbols(mLibrary,
+ firstStruct,
+ tryplatform ? mLookupFunc : nullptr,
+ prefix,
+ warnOnFailure);
+}
+
+PRFuncPtr
+GLLibraryLoader::LookupSymbol(PRLibrary* lib,
+ const char* sym,
+ PlatformLookupFunction lookupFunction)
+{
+ PRFuncPtr res = 0;
+
+ // try finding it in the library directly, if we have one
+ if (lib) {
+ res = PR_FindFunctionSymbol(lib, sym);
+ }
+
+ // then try looking it up via the lookup symbol
+ if (!res && lookupFunction) {
+ res = lookupFunction(sym);
+ }
+
+ // finally just try finding it in the process
+ if (!res) {
+ PRLibrary* leakedLibRef;
+ res = PR_FindFunctionSymbolAndLibrary(sym, &leakedLibRef);
+ }
+
+ return res;
+}
+
+bool
+GLLibraryLoader::LoadSymbols(PRLibrary* lib,
+ const SymLoadStruct* firstStruct,
+ PlatformLookupFunction lookupFunction,
+ const char* prefix,
+ bool warnOnFailure)
+{
+ char sbuf[MAX_SYMBOL_LENGTH * 2];
+ int failCount = 0;
+
+ const SymLoadStruct* ss = firstStruct;
+ while (ss->symPointer) {
+ *ss->symPointer = 0;
+
+ for (int i = 0; i < MAX_SYMBOL_NAMES; i++) {
+ if (ss->symNames[i] == nullptr)
+ break;
+
+ const char* s = ss->symNames[i];
+ if (prefix && *prefix != 0) {
+ strcpy(sbuf, prefix);
+ strcat(sbuf, ss->symNames[i]);
+ s = sbuf;
+ }
+
+ PRFuncPtr p = LookupSymbol(lib, s, lookupFunction);
+ if (p) {
+ *ss->symPointer = p;
+ break;
+ }
+ }
+
+ if (*ss->symPointer == 0) {
+ if (warnOnFailure) {
+ printf_stderr("Can't find symbol '%s'.\n", ss->symNames[0]);
+ }
+
+ failCount++;
+ }
+
+ ss++;
+ }
+
+ return failCount == 0 ? true : false;
+}
+
+} /* namespace gl */
+} /* namespace mozilla */
+