blob: 9d4747714fbc7558f7db6222ddbb457008dd24a3 [file] [log] [blame]
// Copyright 2017 The Dawn & Tint Authors
//
// 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. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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 "dawn/common/DynamicLib.h"
#include <utility>
#include "dawn/common/Platform.h"
#if DAWN_PLATFORM_IS(WINDOWS)
#include "dawn/common/windows_with_undefs.h"
#if DAWN_PLATFORM_IS(WINUWP)
#include "dawn/common/WindowsUtils.h"
#endif
#elif DAWN_PLATFORM_IS(POSIX)
#include <dlfcn.h>
#else
#error "Unsupported platform for DynamicLib"
#endif
namespace dawn {
DynamicLib::~DynamicLib() {
Close();
}
DynamicLib::DynamicLib(DynamicLib&& other) {
std::swap(mHandle, other.mHandle);
}
DynamicLib& DynamicLib::operator=(DynamicLib&& other) {
std::swap(mHandle, other.mHandle);
return *this;
}
bool DynamicLib::Valid() const {
return mHandle != nullptr;
}
bool DynamicLib::Open(const std::string& filename, std::string* error) {
#if DAWN_PLATFORM_IS(WINDOWS)
#if DAWN_PLATFORM_IS(WINUWP)
mHandle = LoadPackagedLibrary(UTF8ToWStr(filename.c_str()).c_str(), 0);
#else
mHandle = LoadLibraryA(filename.c_str());
#endif
if (mHandle == nullptr && error != nullptr) {
*error = "Windows Error: " + std::to_string(GetLastError());
}
#elif DAWN_PLATFORM_IS(POSIX)
mHandle = dlopen(filename.c_str(), RTLD_NOW);
if (mHandle == nullptr && error != nullptr) {
*error = dlerror();
}
#else
#error "Unsupported platform for DynamicLib"
#endif
return mHandle != nullptr;
}
void DynamicLib::Close() {
if (mHandle == nullptr) {
return;
}
#if DAWN_PLATFORM_IS(WINDOWS)
FreeLibrary(static_cast<HMODULE>(mHandle));
#elif DAWN_PLATFORM_IS(POSIX)
dlclose(mHandle);
#else
#error "Unsupported platform for DynamicLib"
#endif
mHandle = nullptr;
}
void* DynamicLib::GetProc(const std::string& procName, std::string* error) const {
void* proc = nullptr;
#if DAWN_PLATFORM_IS(WINDOWS)
proc = reinterpret_cast<void*>(GetProcAddress(static_cast<HMODULE>(mHandle), procName.c_str()));
if (proc == nullptr && error != nullptr) {
*error = "Windows Error: " + std::to_string(GetLastError());
}
#elif DAWN_PLATFORM_IS(POSIX)
proc = reinterpret_cast<void*>(dlsym(mHandle, procName.c_str()));
if (proc == nullptr && error != nullptr) {
*error = dlerror();
}
#else
#error "Unsupported platform for DynamicLib"
#endif
return proc;
}
} // namespace dawn