blob: d6a216216ce7188fbbe3cfa8227c6dff87fc7102 [file] [log] [blame]
/*
* libjingle
* Copyright 2004--2010, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "webrtc/modules/audio_device/linux/latebindingsymboltable_linux.h"
#ifdef WEBRTC_LINUX
#include <dlfcn.h>
#endif
// TODO(grunell): Either put inside webrtc namespace or use webrtc:: instead.
using namespace webrtc;
namespace webrtc_adm_linux {
inline static const char *GetDllError() {
#ifdef WEBRTC_LINUX
char *err = dlerror();
if (err) {
return err;
} else {
return "No error";
}
#else
#error Not implemented
#endif
}
DllHandle InternalLoadDll(const char dll_name[]) {
#ifdef WEBRTC_LINUX
DllHandle handle = dlopen(dll_name, RTLD_NOW);
#else
#error Not implemented
#endif
if (handle == kInvalidDllHandle) {
WEBRTC_TRACE(kTraceWarning, kTraceAudioDevice, -1,
"Can't load %s : %s", dll_name, GetDllError());
}
return handle;
}
void InternalUnloadDll(DllHandle handle) {
#ifdef WEBRTC_LINUX
if (dlclose(handle) != 0) {
WEBRTC_TRACE(kTraceError, kTraceAudioDevice, -1,
"%s", GetDllError());
}
#else
#error Not implemented
#endif
}
static bool LoadSymbol(DllHandle handle,
const char *symbol_name,
void **symbol) {
#ifdef WEBRTC_LINUX
*symbol = dlsym(handle, symbol_name);
char *err = dlerror();
if (err) {
WEBRTC_TRACE(kTraceError, kTraceAudioDevice, -1,
"Error loading symbol %s : %d", symbol_name, err);
return false;
} else if (!*symbol) {
WEBRTC_TRACE(kTraceError, kTraceAudioDevice, -1,
"Symbol %s is NULL", symbol_name);
return false;
}
return true;
#else
#error Not implemented
#endif
}
// This routine MUST assign SOME value for every symbol, even if that value is
// NULL, or else some symbols may be left with uninitialized data that the
// caller may later interpret as a valid address.
bool InternalLoadSymbols(DllHandle handle,
int num_symbols,
const char *const symbol_names[],
void *symbols[]) {
#ifdef WEBRTC_LINUX
// Clear any old errors.
dlerror();
#endif
for (int i = 0; i < num_symbols; ++i) {
if (!LoadSymbol(handle, symbol_names[i], &symbols[i])) {
return false;
}
}
return true;
}
} // namespace webrtc_adm_linux