117 lines
3.6 KiB
C++
117 lines
3.6 KiB
C++
/*
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* libjingle
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* Copyright 2004--2010, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "latebindingsymboltable.h"
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#ifdef WEBRTC_LINUX
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#include <dlfcn.h>
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#endif
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// TODO(grunell): Either put inside webrtc namespace or use webrtc:: instead.
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using namespace webrtc;
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namespace webrtc_adm_linux {
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inline static const char *GetDllError() {
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#ifdef WEBRTC_LINUX
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char *err = dlerror();
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if (err) {
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return err;
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} else {
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return "No error";
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}
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#else
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#error Not implemented
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#endif
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}
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DllHandle InternalLoadDll(const char dll_name[]) {
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#ifdef WEBRTC_LINUX
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DllHandle handle = dlopen(dll_name, RTLD_NOW);
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#else
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#error Not implemented
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#endif
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if (handle == kInvalidDllHandle) {
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WEBRTC_TRACE(kTraceWarning, kTraceAudioDevice, -1,
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"Can't load %s : %d", dll_name, GetDllError());
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}
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return handle;
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}
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void InternalUnloadDll(DllHandle handle) {
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#ifdef WEBRTC_LINUX
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if (dlclose(handle) != 0) {
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WEBRTC_TRACE(kTraceError, kTraceAudioDevice, -1,
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"%d", GetDllError());
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}
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#else
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#error Not implemented
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#endif
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}
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static bool LoadSymbol(DllHandle handle,
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const char *symbol_name,
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void **symbol) {
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#ifdef WEBRTC_LINUX
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*symbol = dlsym(handle, symbol_name);
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char *err = dlerror();
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if (err) {
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WEBRTC_TRACE(kTraceError, kTraceAudioDevice, -1,
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"Error loading symbol %s : %d", symbol_name, err);
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return false;
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} else if (!*symbol) {
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WEBRTC_TRACE(kTraceError, kTraceAudioDevice, -1,
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"Symbol %s is NULL", symbol_name);
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return false;
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}
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return true;
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#else
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#error Not implemented
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#endif
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}
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// This routine MUST assign SOME value for every symbol, even if that value is
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// NULL, or else some symbols may be left with uninitialized data that the
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// caller may later interpret as a valid address.
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bool InternalLoadSymbols(DllHandle handle,
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int num_symbols,
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const char *const symbol_names[],
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void *symbols[]) {
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#ifdef WEBRTC_LINUX
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// Clear any old errors.
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dlerror();
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#endif
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for (int i = 0; i < num_symbols; ++i) {
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if (!LoadSymbol(handle, symbol_names[i], &symbols[i])) {
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return false;
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}
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}
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return true;
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}
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} // namespace webrtc_adm_linux
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